Heat exchanger-modular water heater and heat exchanger element (versions)

FIELD: mechanics, heating.

SUBSTANCE: in compliance with the invention, the heat exchanger-modular water heater incorporates one or two modules each comprising, at least, two heat exchanger units integrated by a diffuser to feed a cooling medium and a confuser to withdraw the medium to be cooled, primarily, a turbine hot exhaust gas. It also comprises the manifolds feeding and withdrawing the medium being heated, primarily, air, each communicating, via a tube plates fitted directly in the said manifold walls, with the multi-row bank of the four-pass heat exchanger variable standard-size pipes, the said standards sizes being calculated from the ratios covered by this invention and the aforesaid tube plates being secured by appropriated spacers. The multi-row bank can be made up of, at least, two trains of two-pass U-shape pipes integrated by the aforesaid manifolds and, at least, one bypass chamber.

EFFECT: high-efficiency heat exchanger, lower heat exchanger metal input, optimum design and spacers, higher design rigidity, simpler assembly of heat exchange pipe banks.

21 cl, 16 dwg

 

The invention relates to a power system, namely, devices for waste heat recovery from gas units, in particular for heating air exhaust products of combustion coming from the compressor of a gas turbine compressor units at compressor stations of main gas pipelines.

Known air heater (SU # 992920, F12L 15/04, 1983), containing one above the other and mounted on the lower frame blocks heat exchange sections formed by a vertical pipe horizontal pipe boards, rigidly connected to each other and the upper junction box with a compensating temperature changes, while the heater is supplied with power by a belt with spring supports, covering wiring trunking, rigidly fastened with a belt in the zone below its compensator, and the area above the last interacting with spring supports.

Also known regenerative air heater (SU # 985595, F12L 15/04, 1982), containing pipe Board fixed inside the bundle of heat exchange tubes mounted in vertical rows which are orthogonal to the reference edges of the tube plate, thus to reduce thermal stresses of the pipe to secure the bundle of tubes in tube plates of the tubes in the rows in the segment is Oh, located in the edges of the tube plate, connected with each other and with the tube boards additional spacers.

The disadvantages of the above devices is their high metal content, due to the presence of vertical heat exchange tubes and the horizontal tube sheets. In the first analog load from the top of the distribution box is perceived through the blocks of the heat exchange sections of the lower frame, and therefore it took the introduction of the power belt with spring supports. In the second analogue to reduce thermal stresses it took the introduction of spacers, uniting pipe between itself and the tube Board.

The closest analogue in part of the heat exchanger is a regenerative air heater (RU # 31838 U1, F23L 15/04, 27.08.2003, containing heat exchange units having collected packages bundles of heat exchange tubes, the ends of which the fastening elements are connected with the collector supply and exhaust air, the bundle of heat exchange tubes has the form of a coil and made odnopalatnim, with the fastening elements of the heat transfer pipes to the collectors made in the form of a separate tube sheets, welded directly into the wall of the respective collector.

The disadvantages closest analogue is that it does not provide high thermal efficiency, and that the same compactness of the packing of heat exchange tubes while providing strength and rigidity, consequently, the closest analogue has a high metal content.

In part of a heat exchanger unit heat exchanger the closest analogue is the heat exchanger of the regenerative air heater, comprising a four-way multi-row bundle of heat exchange tubes (RU No. 17600 U1, F23L 15/04, 10.04.2001,) articulated set of horizontal rows of tubes V-shaped with one loss and two rectilinear branches, and each row contains two sets of tubes V-shaped, located next to each other on the same level.

A disadvantage of this device is that it does not provide a high efficiency of heat transfer and has a high metal content.

The problem to be solved by all objects of the claimed group of inventions is to provide compactness of the device, improve the heat exchange efficiency while increasing the strength and rigidity of the structure and reducing the metal.

The task of the first group object of the invention is solved due to the fact that the heat exchanger - block-sectional heater according to the invention contains at least two sections, within each of which is placed at least two heat exchanger units, each of which includes a diffuser inlet and the confuser for removal of cooling medium to the lecturer inlet and collector drainage of the heated medium, each of which is connected through a separate tube sheets mounted directly in the wall of the corresponding manifold inlet or outlet of the heated environment, with multi-beam four-way heat exchanger tubes, mainly with different number of tubes in the adjacent height rows, predominantly horizontal, with the Department of vertically and horizontally from each other by distantsiruyutsa elements, each heat exchange tube row is made with the number of bends in different pipes beam from four to six, forming four straight branches and connecting them three tribes, and the number and distribution pipes in the beam taken with respect to the conditions under which the ratio of volume VTT[m3]occupied heat exchange tubes in the block and is equal to the total volume of straight branches and knees pipes beam, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes, minus the volume of the shell environment between branches and knees pipes beam to the total internal volume of the heat transfer block Vwnb.[m3], limited by the plate, top cover and end walls of the housing unit, determined in the range of values ofaverage of 0.56÷of 0.85, and the ratio of the total length ∑L [the] pipe beam to the total area of ∑ SNTTexternal heat exchange surface of the pipe is determined by the coefficientcomponents of 0.08÷0,32 [m-1].

In each section of the heat exchanger of the heat exchange units can be placed one above the other, and the preferred number of blocks is four, and the manifold inlet and a manifold outlet of the heated environment can be made with the possibility of connection to the pipeline inlet and outlet of the heated medium, which is used preferably air, including enriched with oxygen, the cooling medium can be used, the products of combustion after the turbine of the gas turbine installation.

The ratio of the combined length ∑l" rectilinear branches of heat exchange tubes, streamlined in the transverse direction, and a total length ∑L [m] of all the heat exchange tubes of the beam can be to 0.78 to 0.92, while the outer and inner tubes in each row of the beam can each contain at least one bending length equal πR, and bendings of the other pipes in all ranks of the beam can be made of length equal tothe outer tube of each series, with more pipes than in adjacent rows, one died in length πR, forming the knee, connecting the internal branch of this pipe, and the total number is about bend this pipe is five, while the inner pipe of each of the rows having more pipes than in adjacent rows, has two bending length πR, each of which forms a knee connecting the respective inner and outer branches of this pipe, and the total number of bends in this pipe is four, step and between the longitudinal axes of the adjacent pipe straight branches is (1,5-2,5)d, where d is the outer diameter of the tubes, step b between the axes of adjacent tubes on the straight parts of the knees is (1,8-2,8)d, and in each row step and between the longitudinal axes of the adjacent pipe straight branches is less than or greater than the step b between the longitudinal axes of the knee adjacent pipe, and preferably<b or step is the step b, and the number of heat transfer tubes interconnecting the height of the beam for odd and even rows may be respectively m and n, where m is an even number, and n=(m-1), the number of rows of tubes in the bundle of k - preferably odd, and k>3, the tubes in the adjacent height rows can to be placed in a checkerboard pattern with offset (0,4÷0,6)a, [m], where a is the spacing between the longitudinal axes of adjacent tubes on the straight branches of the same series [m], the number of tubes in the unit may be preferably 263-563 pieces

Every knee pipes of all ranks of the beam, formed by two bends in length each, equalmay win coupled with gibs rectilinear insert a length, a multiple of 2A, where a is the spacing between the axes of the same rectilinear branches of adjacent tubes of the row, or every knee pipes of all ranks of the beam, formed by two bends in length each, equalmay contain conjugated with gibs rectilinear box in length, varying in different pipes range from a value equal to 2a±10% [m] to a value equal to 2a (m-1)±10% [m] for rows with a large number of tubes than in the adjacent height rows, and for the remaining rows to a value equal to a(2n-1)±10% [m], where

a step between the axes of the same name rectilinear branches adjacent pipe series [m],

m is the number of pipes in a row with a large number of pipes, mainly an even number of tubes in the odd rows

n is the number of pipes in a row with a smaller number of pipes, mainly an odd number of tubes in the even rows.

The task of the second object of invention is the first option of performing a heat exchanger unit heat exchanger - block-section of the air heater according to the invention contains four branches of the four-way multi-row bundle of heat exchange tubes, arranged in horizontal rows and distanceremaining horizontally and vertically from each other, a manifold inlet and a manifold outlet of the heated medium, each of which is connected with a heat exchange tubes through individual Trubnikov, mounted directly in the wall of the corresponding manifold inlet or outlet of the heated medium, each heat exchange tube row is made with four, or five, or six bends of radius R, forming four straight branches and connecting them three tribes, with lots of bending the two tubes in each odd row has length πR, namely, one of the pipes on the inner knee, the other on up to two external knees for the rest of the pipes odd and even rows of plots bending length πR/2 and articulated in pairs by straight inserts of length N'ifor external knees and Hifor the inner knee, and the number of heat transfer tubes interconnecting the height of the beam for odd and even rows respectively m and n, where m is an even number, and n=(m-1), the number of rows of tubes in the bundle of k - preferably odd, and k>3, the tubes adjacent the height of the rows arranged in a checkerboard pattern with offset (0,4÷0,6) [m], where a is the step between the longitudinal axes of the rectilinear branches of adjacent tubes of one series [m], with length N'iand Nistraight inserts the knee of the i-th tube is variable: for an odd number of heat exchange tubes vary from a value equal to 2A±10% [m], to a value equal to 2A(m-1)±10% [m], and for even number from value, equal and 10% [m], to a value equal to a(2n-1)±10% [m].

Placement of tubes in the volume occupied, at least one branch of the beam, may be accepted with conditions, the first of which is the ratio of the total area of ∑FNTPthe outer heat exchange surface of the pipes that branch beam to the volume ∑VM.S.occupied by the shell environment in the zone of active heat transfer branches of the beam and is equal to the volume of the branches of the beam at the outer contour, defined conditional planes related to the external surfaces of extreme heat exchange tubes branch beam, minus the volume occupied by the actual heat exchange tubes in this branch of the beam is in the range of values defined by the coefficientcomponents (84,5-460) [m-1], the second condition is that the ratio of the total volume of ∑VV.S.for the heated medium in the pipe branch beam to the volume VMSdetermined coefficientcomponents 0,78-1,25.

The parameters of each tube of the series can be defined dependencies:

Li+1=2l'i+1+2l"i+1-Δ+2H'i+1+H"i+1+3πR

Li+1- length sweep (i+1)-th pipe series [m];

l'i+1- the length of the outer rectilinear branch (i+1)-th pipe of a number equal to

l'i+1=l'i-b [m];

l"i+1the length of the inner straight branch (i+1)-th pipe of a number equal to the li+1=l'i-Δ [m];

H'i+1- length of straight inserts external knees (i+1)-th pipe of a number equal to N'i+1=N'i-2a [m],

N"i+1- length of straight insertion of the inner knee (i+1)-th pipe of a number equal to N"i+1=H"i+2A [m];

a step between the longitudinal axes of the same name rectilinear branches adjacent in the row of pipe [m];

b - step between the longitudinal axes of the rectilinear inserts knees adjacent pipes in a row [m];

Δ - empirical value [3-12]·10-3[m];

l'i, liN'iand Ni- the appropriate settings for the first tube in the series, starting from the outer tube to the inner in this series, and step and is (1,5-2,5)·d, step b may be (1,8-2,8)·d, where d is the outer diameter of heat transfer tube [m], sweep length Lminheat pipe minimum length shall be not less than 0.75 of the length of the sweep Lmaxthe tubes of maximum length, thus placing the heat exchange tubes in the row can be selected in compliance with the conditions under which the ratio of the area of the inner surface of heat exchanger tubes in straight-ve is Vah series located perpendicular to the flow of cooling medium to the volume occupied by the adjacent heat exchange tubes, and is equal to the volume defined conditional planes related to the external surfaces of heat exchange tubes of the row, taking into account the gaps between the pipes is 0,02-0,12 [m-1].

Pipe row may contain an even number of tubes, preferably at least two and not more than ten, or it may contain an odd number of tubes, preferably of not less than three and not more than nine, the tubes can be arranged in series with a variable distance between the axes of the outer branches, and the lowest value of the distance from the pipe, the ends of which can be terminated at next to each other apertures corresponding sibling rows of holes in the tube plate collectors inlet and outlet of the heated medium, preferably air, a heat exchanger unit regenerative air heater, and each subsequent chetyrehvetvevoj pipe number can be made covering the previous with the outer side of the outer branches and the highest value of this distance from the pipe, the ends of which can be sealed at the most remote from each other apertures corresponding sibling rows of holes in the tube plate collectors inlet and outlet of the heated medium, and two internal branches each is sleduyushei pipe in a series of connecting them with the knee placed outside in the bend, formed by the respective branches and connecting the knee of the previous tube in the tube row, at this step and between the longitudinal axes of the same name rectilinear branches of adjacent tubes in the row is less than or greater than the step b between the longitudinal axes of the rectilinear inserts knees adjacent pipes in a row, and preferably<b or step is the step b, and, in addition, for each heat exchange tube row distance H between the longitudinal axes of its external rectilinear branches is (30-85)d; length of straight branches l' and l" can be respectively (74-145)d and (100-135)d, where d is the outer diameter of heat transfer tube [m], the number N of heat exchange tubes in a block with an odd number of rows k pipes in the beam is determined by the dependence N=0,5(k-1)(2m-1)+m and is preferably 263-563 units, or the number N of heat exchange tubes in the unit when there is an even number k of tubes in the bundle is determined by the dependence N=0,5k(2m-1) and is preferably 263-563 pieces

Between the reservoir inlet and outlet of the heated environment can be mounted displacer tube environment, made in the form of a profiled panel with a flat plane located between the collector supply or exhaust of the heated environment, while the square bore manifold inlet or exhaust manifold heated medium may be of 0.45-0,82 total area ol the output section of the heat exchange tubes of the bundle, moreover, the heat exchange unit can be equipped with devices for slinging and manholes-manholes, made in the collector supply and discharge of the heated medium.

The task of the third group object of the invention is the second option of performing a heat exchanger unit heat exchanger - block-section of the air heater according to the invention contains a spatial frame, bottom, top cover and end walls of the housing, the diffuser inlet and the confuser for removal of cooling medium, the reservoir inlet and outlet of the heated medium pipe boards and multi-pass multi-row bundle of heat exchange tubes, forming respectively in each row an even number of straight Novotrubny branches, including at least two internal and two external, United plots with gibs mostly constant for all pipes beam radius, or multi-row bundle of heat exchange tubes, consisting of at least two packages of two-way U-shaped tubes forming within each package dvuhvetvevym, for example, the horizontal rows of tubes, distanceremaining within rows and between rows from each other, a manifold inlet and a manifold outlet of the heated medium and located between at least one overflow chamber, and a manifold inlet and a manifold drain agrave the second environment, and an overflow chamber is connected to the heat exchange tubes of the tube Board or separate pipe boards, at least part of which is, or which forms part of a wall fence collector inlet and exhaust manifold heated medium and a bypass chamber, with the bottom cover and one of the end walls of the housing unit is made in the form of panels with piping of stiffeners forming a flat rod system, and the spatial frame unit is formed by a set of plane truss systems frameworks of these panels with their apex intermediate the uprights and rigidly associated with the casing inlet and outlet of the heated medium, which, in turn, is connected with the bottom of the block and between dvukhkontsevaya diaphragms and the displacer shell environment, with part of the casing inlet and outlet of the heated medium mounted them pipe boards and a displacer shell environment form total developed spatial rigid end wall of the housing unit, and the longitudinal sides of the frame is made with fastening elements respectively of the diffuser and confuser for supply and removal of cooling medium, with each heat exchange tube bundle of the distance H between the longitudinal axes of its external ramalina what's branches is (30-85)d; length of straight branches l' and l", respectively (95-145)d and (100-135)d, where d is the outer diameter of heat transfer tube [m].

The displacer tube may be made in the form of a profiled panel with a flat plane, the inner surface of which may be located between the reservoir inlet and outlet of the heated medium in the same plane with the outer plane of the tube plates, or in the form of a flat bar welded to the walls of the reservoir inlet and outlet of the heated environment so that its inner surface may be located in the same plane with the outer plane of the tube plates, with the heat exchange unit can be supplied mounted on the bottom of the chassis unit discontinuously elements for heat-exchanger tubes in the outer branches of the multi-beam in the form of distantsiruyutsa gratings, and mentioned heat exchanger pipes can be passed through holes distantsiruyutsa gratings, and subsequent rows of heat exchange tubes in the area of internal branches can be separated discontinuously straps folded form, which can be attached to the racks set on the bottom, and, in addition, on the bottom of the case can be attached combs for at least the internal branches of the lower row of heat exchange tubes.

The cross-sectional area of each of the collectors ACC is Yes and outlet of the heated medium may be of 1.8-3.5 from the total of the cross-section area of heat exchange tubes in the unit, when the collector supply and discharge of the heated medium can be performed with manholes-manholes, spaced from the bottom of the block, with manhole covers-manhole hinge can be secured to the casing inlet and outlet of the heated environment can be rotated in the plane perpendicular to the longitudinal axis of symmetry of the collector supply and discharge of the heated medium, and on the inner walls of the reservoir inlet and outlet of the heated environment can be installed on a support, forming a ladder for inspection and maintenance of the reservoir inlet and outlet of the heated medium pipe and boards, and the heat exchange unit can be equipped with means for attaching the diffuser to supply and confuser for removal of cooling medium, installed on the opposite side elements of the spatial framework of the unit, as well as the brackets for attaching the outer insulation.

Distantsiruyasj grilles can be installed to lock in the case of the regenerative air heater, distantsiruyasj strap folded form can be located on two sides alternating reference plots, one for the top and bottom edges of the folds for the contact corresponding to the lower and upper ledges adjacent the height of the folded strips and connecting two ledges n is stronger plot, forming the supporting elements for supporting the beam pipe, while the tubes distanced vertically and horizontally from each other by ensuring that the distance between the longitudinal axes of the adjacent heat exchange tubes in a row, which is about 1.5-2.3 diameter of the tubes, and in the next the height of the rows with the provision of the distance between the longitudinal axes of the heat exchange tubes of adjacent rows, constituting 0.6 to 1.5 diameter of the tubes, with the tubes in the adjacent height rows can be arranged in a checkerboard pattern, distantsiruyasj folded strips overlying each row can be supported with its bottom tabs on unto them the top of the upper projections of the folds adjacent the height of the underlying distantsiruyutsa strap with the education system of support contacts, offset in each height range 0.4-0.6 step tubes in the row, and the thickness of the folded strap shall be not less than 0.03 diameter heat exchange tubes, and distantsiruyasj elements on the external and internal branches may be located along the length of the heat exchange tubes preferably with the same step, while supporting areas on the upper and lower edges of the folds can be made with the supporting surface in the form of a fragment of a cylindrical surface of radius constituting not more than 35% of the diameter of the heat exchange of the second pipe, convex to the outside, or reference areas on the upper and lower edges of the folds can be made with a flat bearing surface.

The inlet manifold or the exhaust manifold of the heated medium may be in the form of a cylindrical shell with an aperture, which may be welded tube plate, and a projection on the end face of the tube plate curved section of the shell, forming the end face of the opening may be located within the thickness of the tube plate, which can be done with through holes at the ends of heat exchange tubes of a heat exchanger unit, and the holes can be arranged in rows along the height of the tube plate in increments of axes in a row, the components of (1,5-2,8)·d, step series on the height of the tube plate comprising (0,60-0,84)·d, where d is the outer diameter of the tubes, and with offset holes in adjacent rows (0,4÷0,6) step value in the row, with the total area of the through holes in the tube plate at the ends of heat exchange tubes of the heat exchange unit may be 56-85% of the overall square pipe field in the plane of the tube plate, bounded by the contour formed by the set of conditional direct tangent to the outer edges at the holes in the tube plate and square tube field can be 0,75÷0,94 from the total area of the frontal projection of the pipe is oski, the connection of the shell and tube Board in the plane of the cross-section of the shell may be made in the angular range γ=28-75°and the ratio of the area of projection onto a specified plane curvilinear section of the shell, forming the end face of the opening to the area of the projection on the plane of the corresponding end face of the tube plate can be 0,048÷0,172, and the side edges of the tube plate can be made triangular, with one of the faces can be made with education in cross-section in contact with the sides of the support section and the adjacent faces can be made - one adjacent to the surface of the tube plate, facing the collector inlet or outlet of the heated medium, with the bevel forming with the plane of the reference corner plot α=(22-29)°and the other addressed to the external surface of the tube plate, the face can be performed with the bevel forming with the plane of the reference corner plot β=(25-35)°.

Triangular edge of the tube plate can be performed with the width of the support section comprising at least 4.5% of the total thickness of the pipe forming Board wafer, the edge with bevel α=(22-29)° can be made wide, part of 5.9 to 12.5% of total thickness of the plate, and the edge with bevel β=(25-35)° can be made wide, component 79-89,6% of the total thickness of the plates is.

The task of the fourth object group of inventions is the third version of the complete heat exchanger heat exchanger of the type of block or block-sectional regenerative air heater according to the invention contains a multi-row bundle of heat exchange tubes, consisting of at least two packages of two-way U-shaped tubes forming within each package dvuhvetvevym, for example, the horizontal rows of tubes, distanceremaining within rows and between rows from each other, a manifold inlet and a manifold outlet of the heated medium and located between at least one overflow chamber, and a manifold inlet and a manifold outlet of the heated medium, and the bypass chamber is connected with a heat exchange tubes of the tube Board or separate pipe boards, at least part of which is, or which forms part of a wall fence collector inlet and exhaust manifold heated medium and the bypass chamber, the total area of the through holes in the tube plate or tube plates at the ends of heat exchanger tubes heat exchanger unit is 29-85% of the overall square pipe of the field.

Each package through a series of one inner tube of the series may be made by bending a length equal to πR, and all other pipes of all rows in a batch is to be performed with two bends each length, equal πR/2, where R is the bend radius, comprising (2,5-6,0)d, where d is the external diameter of the tubes, and can be articulated in pairs by means of linear sections of different lengths.

The number and distribution pipes in the beam can be taken with respect to the conditions under which the ratio of the volume VTT[m3]occupied heat exchange tubes in the block and is equal to the total volume of straight branches and knees pipes beam, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes, minus the volume of the shell environment between branches and knees pipes beam to the total internal volume of the heat transfer block Vwnb.[m3], defined in the range valuesaverage of 0.56÷of 0.85, and the ratio of the total length ∑L [m] pipe beam to the total area of ∑SNTTexternal heat exchange surface of the pipe is determined by the coefficientcomponents of 0.08÷0,32 [m-1].

In each row step and between the longitudinal axes of the adjacent pipe straight branches is less than or greater than the step b between the longitudinal axes of the knee adjacent pipe, preferably a<b, or step and may be equal to step b.

Step a between the longitudinal axes of the adjacent pipe straight branches can be (1.5 to 2.5)d, where the d - the outer diameter of the tubes, step b between the axes of adjacent tubes on the straight parts of the knee may be (1,8-2,8)d.

As the heated medium can be used preferably air, including enriched with oxygen, the cooling medium can be used, the products of combustion after the turbine of the gas turbine installation.

The technical result provided by all the objects of a group of inventions is to provide a high efficiency of heat transfer while reducing the metal regenerative air heater due to the developed invention designs of heat exchanger and its elements, allowing optimal placement of heat exchange tubes in the beam, optimal performance distantsiruyutsa elements, increasing the stiffness and strength of structures operating at high temperatures while reducing the metal by reducing the size and metal grating elements for heat-exchanger tubes and simplify the Assembly of the bundle of heat exchange tubes.

The ratio of the volume VTT[m3]occupied heat exchange tubes in the block and is equal to the total volume of straight branches and knees pipes beam, defined by the outer contour of the conditional planes touching the I outer surfaces of extreme heat exchange tubes, net volume of intertubular environment between branches and knees pipes beam to the total internal volume of the heat transfer block Vwnb.[m-1] is defined by the coefficientIf the specified value is less than 0,56, it leads to unnecessary consumption of materials and increase in size and inefficient use of the heat of exhaust gases of combustion, if the specified value is greater 0,85 - there is a sharp decrease in the efficiency of heat exchange processes due to the increased aerodynamic resistance when passing through a supersaturated pipe volume of the heat exchanger.

The ratio of the total length ∑L [m] pipe beam to the total area of ∑SNTTexternal heat exchange surface of the pipe is determined by the coefficientIf the specified value is less than 0,08 sharply deteriorate heat transfer processes due to the large diameters of the pipes and the lack of specific surface per unit volume of the heated space, if the specified value is greater 0,32 - there is a sharp increase in the aerodynamic drag of the flow of heated air in the pipes due to small diameter pipes.

The ratio of the total area of ∑FNTPthe outer heat exchange surface of the pipes that branch beam to the volume ∑V MSoccupied by the shell environment in the zone of active heat transfer branches of the beam and is equal to the volume of the branches of the beam at the outer contour, defined conditional planes related to the external surfaces of extreme heat exchange tubes branch beam, minus the volume occupied by the actual heat exchange tubes in this branch of the beam is in the range of values defined by the coefficient

If the specified value is less than 84,5 - is an inefficient use of space and excessive consumption and lower efficiency of heat transfer due to irrational sparse arrangement of tubes in the bundle and the under-utilization of the heat of exhaust gases to heat the air in the apparatus. If the specified value is greater 460, there is a decrease in the efficiency of heat exchange and increased energy losses due to a sharp increase in aerodynamic resistance due to over-saturation of the volume of the beam pipes.

The ratio of the total volume of ∑VV.S.for the heated medium in the pipe branch beam to the volume VMSdetermined coefficient. If the specified value is less than 0,78, there is a decrease in the efficiency of the device due to low productivity heating insufficient in the spirit per unit volume of exhaust gases of combustion. If the specified value is greater of 1.25, it can also decrease the efficiency of the device due to the irrational ratio of the volumes of heated air and cooled medium is flue gas combustion.

If the total area of the through holes in the tube plate or tube plates at the ends of heat exchange tubes of the heat transfer block is less than 29%, takes place undue waste of material on the tube plate and a sharp decrease in the efficiency of the heat exchange unit due to insufficient performance of the unit, and if said ratio is more than 85% - decreases the efficiency of heat transfer due to saturation of the volume of the block pipes and irrational ratio of the volume of heated medium and volume of the cooling medium is flue gas combustion.

The invention is illustrated by drawings, where

1 shows a regenerative air heater, side view;

figure 2 - the same, top view;

figure 3 - heat exchanger of the regenerative air heater, top view;

figure 4 - heat exchanger tube, top view;

figure 5 - node a in figure 3;

figure 6 - cross section b-B in figure 3;

figure 7 - heat exchanger of the regenerative air heater with open hatch covers-manhole, top view;

on Fig - block regenerative air heater is a perspective view of;

n the Fig.9 - distanziali element in the form of folded plates;

figure 10 is a section of the regenerative air heater, the main view;

figure 11 is a section of the regenerative air heater, side view;

on Fig - collector inlet or outlet of the heated environment, the main view;

on Fig - section b-b In Fig;

on Fig node G on Fig;

on Fig node D on Fig;

on Fig - embodiment of a heat exchanger unit with an overflow chamber in the plan.

Heat exchanger - block-section of the heater contains at least two sections 1, within each of which is placed at least two heat exchanging unit 2, each of which includes a diffuser 3 for the supply and the confuser 4 for removal of cooling medium, the inlet manifold 5 and an exhaust manifold 6 of the heated medium, each of which is connected through a separate tube sheets 7, which are mounted directly in the wall of the corresponding manifold inlet 5 or the outlet 6 of the heated environment, with multi-beam 8 four-way heat exchange tubes 9, mainly with different number of tubes 9 in the adjacent the height of the rows 10, mostly horizontal, with the Department of vertically and horizontally from each other by distantsiruyutsa elements 11. Each heat exchange tube 9 number 10 is made with a number of bends 12, 13 different pipes 9 p is CCA 8 from four to six, forming four straight branches 14, 15 and connecting them three tribes 16, 17, 18. The number and distribution pipes 9 in beam 8 are taken with respect to the conditions under which the ratio of the volume VTT[m3]occupied heat exchange tubes 9 in block 1 and is equal to the total volume of straight branches 14, 15 and knees 16-18 pipe 9 of the beam 8, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes 19, 20, minus the volume of the shell environment between the branches 14, 15 and knees 16-18 pipe 9 of the beam 8, to the total internal volume of the heat transfer block Vwnb.[m3], limited by the plate, top cover and end walls of the housing unit, determined in the range of values ofaverage of 0.56÷0,85. The ratio of the combined length ∑L [m] pipe 9 of the beam 8 to the total area of ∑SNTTexternal heat exchange surface of the pipe 9 is determined by the coefficientcomponents of 0.08÷0,32 [m-1].

In each section 1 heat exchanger heat exchanger blocks 2 are arranged one above the other, and the preferred number of blocks is four. The inlet manifold 5 and an exhaust manifold 6 of the heated medium is made with possibility of connection to the pipeline inlet and outlet of the heated medium, which is used in the N. preferably air, including enriched with oxygen. As the cooling medium used in the products of combustion after the turbine of the gas turbine installation.

The ratio of the combined length ∑l" rectilinear branches 14, 15 of the heat exchange tubes 9, streamlined in the transverse direction, and a total length ∑L [m] of all the heat exchange tubes 9 of the beam 8 is 0.78 to 0.92. External 19 and the inner pipe 20 in each row 10 of the beam 8 each contain at least one bend 12 length equal πR, and the bends 13 other pipes 9 in every 10 rows beam 8 made of length equal to. The outer tube 19 of each of the rows 10, having a larger number of tubes 9 than in adjacent rows has one died 12 long πR, forming the knee 17 connecting the internal branch 15 of this pipe 9, and the total number of bends 12, 13 this pipe is five. The inner tube 20 of each of the rows 10, having a larger number of tubes 9 than in adjacent rows, has two bend 12 in length πR, each of which forms a knee 16, 18 connecting the respective inner 15 and outer 15 this branch pipe 9, and the total number of bends 12, 13 this pipe 9 is four. Step a between the longitudinal axes of the adjacent pipe 9 straight branches 14, 15 is (1,5-2,5)d, where d is the outer diameter of the tubes 9. Step b between the axes of adjacent pipe 9 on the straight parts of the inserts 21 knees 16-18 is (1,8-2,8d. In each row 10 step and between the longitudinal axes of the adjacent pipe straight branches 14, 15 is less than or greater than the step b between the longitudinal axes of the knee 16-18 adjacent pipe 9, and preferably<b or step is the step b, and the number of heat exchange tubes 9 in the adjacent height rows 10 beam 8 for odd and even rows respectively m and n, where m is an even number, and n=(m-1), the number of rows of tubes in the bundle of k - preferably odd, and k>3, the tubes adjacent the height of the rows arranged in a checkerboard pattern with offset (0,4÷0,6)a [m], where a is the spacing between the longitudinal axes of adjacent tubes on straight branches 14, 15 of one row of 10 [m], the number of tubes 9 in block 1 is preferably 263-563 pieces

Every knee 16-18 pipe 8 all series 10 beam 8, formed by two bends 13 length of each equalcontains conjugated with gibs 13 rectilinear box 21 with a length that is a multiple of 2A, where a is the spacing between the axes of the same rectilinear branches 14, 15 adjacent pipe 9 number 10, or every knee 16-18 pipe 9 all series 10 beam 8, formed by two bends 13 length of each equalcontains conjugated with gibs 13 rectilinear box 21 in length, varying in different pipes 9 number 10 from the value equal to 2A±10% [m], to a value equal to 2A(m-1)±10% [m], for a series with a large number of tubes 9, the eat in connecting with them on the height of the rows, and for the rest of the series to a value equal to a(2n-1)±10% [m], where

and pitch axes of the same name rectilinear branches adjacent pipe series [m],

m is the number of pipes in a row with a large number of pipes, mainly an even number of tubes in the odd rows

n is the number of pipes in a row with a smaller number of pipes, mainly an odd number of tubes in the even rows.

Heat exchanger 2 in the first embodiment perform the heat exchanger - block-section of the heater contains four branches 14, 15 four-way multi beam 8 of the heat exchange tubes 9, arranged in horizontal rows 10 and distanceremaining horizontally and vertically from each other, the inlet manifold 5 and an exhaust manifold 6 of the heated medium, each of which is connected with a heat exchange tubes 9 through a separate tube sheets 7, which are mounted directly in the wall of the corresponding manifold inlet 5 or the outlet of the heated medium. Each heat exchange tube 9 number 10 is made with four, or five, or six bends 12, 13 radius R, forming four straight branches 14, 15 and connecting them three tribes 16-18. Lots bend 12 the two pipes 9 in each odd row has length πR, namely, one of the pipes on the inner knee 17, the other - on the two outer lap 16, 18, for the rest of the pipes odd and even rows in ascci bend 13 have a length of π R/2 and articulated in pairs by means of straight-line inserts 14, 15 length N'ifor external lap 16, 18 and N"ifor internal knee 17. The number of heat exchange tubes 9 in the adjacent height rows 10 beam 8 for odd and even rows respectively m and n, where m is an even number, and n=(m-1). The number of rows of 10 tubes 9 in beam 8 k - preferably odd, and k>3, the tubes adjacent the height of the rows arranged in a checkerboard pattern with offset (0,4÷0,6) [m], where a is the step between the longitudinal axes of the rectilinear branches of adjacent tubes of one series [m]. Length N'iand N"istraight inserts 21 knees 16-18 i-th tube is made variable: for an odd number of heat exchange tubes vary from a value equal to 2a±10% [m], to a value equal to 2a(m-1)±10% [m], and for an even number of - magnitude equal to a±10% [m], to a value equal to a(2n-1)±10% [m].

The placement of the pipes 9 in the volume occupied, at least one branch 14 or 15 of the beam 8, accepted with conditions, the first of which is the ratio of the total area of ∑FNTPthe outer heat exchange surface of the tubes 9 of this branch 14 or 15 of the beam 8 to the volume ∑VMSoccupied by the shell environment in the zone of active heat transfer branch 14 or 15 of the beam 8 and is equal to the volume of the branches 14 or 15 of the beam 8 on the outer con is ur, defined conditional planes related to the external surfaces of extreme heat exchange tubes 19, 20 branch 14 or 15 of the beam 8, minus the volume occupied by the actual heat exchange tubes 9 in this branch 14 or 15 of the beam 8, is in the range of values defined by the coefficientcomponents (84,5-460) [m-1], the second condition is that the ratio of the total volume of ∑VV.S.for the heated medium in the pipe branch beam to the volume VMSdetermined coefficientcomponents 0,78-1,25.

The parameters of each pipe 9 number 10 is defined dependencies:

Li+1=2l'i+1+2l"i+1-Δ+2H'i+1+H"i+1+3πR

Li+1- length sweep (i+1)-th pipe series [m];

l'i+1- the length of the outer rectilinear branches 14 (i+1)-th pipe of a number equal to l'i+1=l'i-b [m];

l"i+1the length of the inner straight branch 15 (i+1)-th pipe of a number equal to l"i+1=l'i-Δ [m];

H'i+1- length of straight inserts 21 of the outer lap 16, 18 (i+1)-th pipe of a number equal to N'i+1=H'i-2A [m];

Hi+1- length of straight insertion of the inner knee (i+1)-th pipe of a number equal to N"i+1=Hi"+2A [m];

and the step between the longitudinal axes of the same name rectilinear branches adjacent in the row of pipe [m];

b - step between the longitudinal axes of the rectilinear inserts knees adjacent pipes in a row [m];

Δ - empirical value [3-12]·10-3[m];

l'il"iN'iand H"i- the appropriate settings for the first tube in the series, starting from the outer tube to the inner in this series, and step and is (1,5-2,5)·d, step b is (1,8-2,8)·d, where d is the outer diameter of heat transfer tube [m], sweep length Lminheat pipe minimum length is not less than 0.75 of the length of the sweep Lmaxthe tubes of maximum length, thus placing the heat exchange tubes 9 in the range of 10 selected to satisfy the conditions according to which the ratio of the area of the inner surface of heat exchanger tubes 9 on straight branches 14, 15 rows perpendicular to the flow of cooling medium to the volume occupied by the adjacent heat exchange tubes, and is equal to the volume defined conditional planes related to the external surfaces of heat exchange tubes 9 number 10, taking into account the gaps between the pipes is 0,02-0,12 [m-1].

Pipe row 10 contains an even number of tube 9, preferably at least two and not more than ten, or he has an odd h the words of the pipes 9, preferably at least three and not more than nine, while the tubes are in series with a variable distance between the axes of the outer branches 14, 15. The lowest value of the distance from the pipe, the ends of which are sealed in the extreme next to each other apertures corresponding sibling rows of holes in the tube plate 7 reservoir inlet 5 and outlet 6 of the heated medium, preferably air, a heat exchanger unit 2 regenerative air heater. Each subsequent chetyrehvetvevoj pipe 9 number 10 made covering the previous with the outer side of the outer branches 14 and the highest value of this distance from the pipe 9, the ends of which are sealed at the most remote from each other apertures corresponding sibling rows of holes in the tube plate 7 reservoir inlet 5 and outlet 6 of the heated medium. Two internal branches 14 of each subsequent pipe in a series of connecting with their knee 17 posted the outer side of the bend formed by the respective branches 15 and connecting the knee 17 previous pipe in the pipe line. Step a between the longitudinal axes of the same name rectilinear branches 14, 15 adjacent tubes in the row is less than or greater than the step b between the longitudinal axes of the rectilinear inserts 21 knees 16-18 adjacent pipes in a row, preferably a<b or step is the step b, and, in addition, for each heat e is constant pipe some distance H between the longitudinal axes of its external rectilinear branches is (30-85)d; length of straight branches l' and l", respectively (74-145)d and (100-135)d, where d is the outer diameter of heat transfer tube [m]. The number N of heat exchange tubes 9 in block 2 with an odd number of rows k pipes in the beam is determined by the dependence N=0,5(k-1)(2m-1)+m, or N number of heat exchange tubes in the unit when there is an even number k of tubes in the bundle is determined by the dependence N=0,5k(2m-1).

Between the reservoir inlet 5 and outlet 6 of the heated medium is fixed displacer 22 shell environment, made in the form of profiled panels with flat area 23 located between the reservoir inlet 5 and outlet 6 of the heated medium. Square bore manifold inlet 5 or the exhaust manifold 6 of the heated medium is 0.45-0,82 total of the cross-section area of the heat exchange tubes 9 of the beam 8. Heat exchange unit 2 is equipped with a device 24 for slinging and manholes-manholes (not shown)made in the reservoir inlet 5 and outlet 6 of the heated medium.

Heat exchanger 2 according to the second variant implementation contains a spatial frame 25, a bottom 26, a top cover 27 and end walls 28 of the housing 29, the diffuser 3 for the supply and the confuser 4 for removal of cooling medium, the reservoir inlet 5 and outlet 6 of the heated medium pipe 7 boards and a multi-pass multi beam 8 of the heat exchange tubes 9, abrazos the x respectively in each row 10 an even number of straight Novotrubny branches 14, 15, including at least two 15 internal and two external 14, the joint sections with bends 12, 13 mostly constant for all pipes 9 beam 8 radius. The bottom 26, the cover 27 and one of the end walls 28 of the housing 29 of the block 2 is made in the form of panels with piping of stiffeners forming a flat rod system 30. Spatial frame 25 of the block 2 is formed by a set of plane truss systems 30 frames these panels uniting their intermediate racks 31 and rigidly associated with the casing inlet 5 and outlet 6 of the heated medium. The reservoir inlet 5 and outlet 6 of the heated environment, in turn, is connected with the bottom 26 of the block 2 and between dvukhkontsevaya diaphragms and the displacer 22 shell environment. Part of the casing inlet 5 and outlet 6 of the heated medium mounted them pipe boards 7 and the displacer 22 shell environment form total developed spatial rigid end wall 32 of the housing 29 of the block 2. Along the longitudinal sides of the frame 25 is made with fastening elements respectively of the diffuser 3 for the supply and confuser 4 for removal of cooling medium. For each of the heat exchange tubes 9 of the beam 8, the distance H between the longitudinal axes of its external rectilinear branches 14, 15 is (30-85)d; length of straight branches l' and l" sostav the et, respectively (95-145)d and (100-135)d, where d is the outer diameter of heat transfer tube [m].

The displacer 22 shell environment made in the form of a profiled panel with a flat plane 23, the inner surface of which is located between the reservoir inlet 5 and outlet 6 of the heated medium in the same plane with the outer plane of the tube plates 7, or in the form of a flat bar welded to the walls of the reservoir inlet 5 and outlet 6 of the heated environment so that its inner surface lies in the same plane with the outer plane of the tube plates 7. Heat exchanger 2 is provided secured to the bottom 26 and the frame 25 of the housing 29 unit 2 discontinuously elements 11 for the heat exchange tubes 9 of the outer branches 14 of the beam in the form of distantsiruyutsa lattices. Mentioned the tubes are fed through holes distantsiruyutsa lattices. Subsequent rows of heat exchange tubes 9 into the inside of the branches 15 are separated discontinuously straps 33 folded form, which is attached to the racks set on the bottom 26. On the bottom 26 of the housing 29 is fixed combs 34 to at least the inner branches 15 of the bottom row of heat exchange tubes 9.

The cross-sectional area of each of the collectors inlet 5 and outlet 6 of the heated medium is 1.8 and 3.5 of the total area of the flow area of the heat exchange tubes 9 in block 2. The reservoir inlet 5 and outlet 6 of the heated environment issue is lnany with manholes-manholes, spaced from the bottom 26 of the block 2. The cover 35 covers-manhole hinged to the casing inlet 5 and outlet 6 of the heated environment can be rotated in the plane perpendicular to the longitudinal axis of symmetry of the reservoir inlet 5 and outlet 6 of the heated medium. On the inner walls of the reservoir inlet 5 and outlet 6 cooling medium is installed a support, forming a ladder for inspection and maintenance of the reservoir inlet 5 and outlet 6 of the heated medium pipe and boards 7.

Heat exchange unit 2 is equipped with means for attachment of the diffuser 3 for the supply and confuser 4 for removal of cooling medium, installed on the opposite side elements of the spatial framework 25 block 2, and brackets for attaching the outer insulation.

For foreign branches 14 of the beam 8 distantsiruyasj elements 11 ensuring separation of heat exchange tubes 9 horizontally and vertically and their spatial fixation, formed by the separator 36 with holes for the passage of pipes 9, made with the possibility of fixing in the case of the regenerative air heater 1. For internal branches 15 of the beam 8 pipe 9 distantsiruyasj elements 11 made in the form of distantsiruyutsa strips 33 folded shape having located on both sides of the plates alternating reference sections 37 one-ve on the khnemu and lower edges of the folds for the contact corresponding to the lower and upper ledges adjacent the height of the folded strips 33 and the connecting tabs of the two inclined section 38, forming the supporting elements for supporting the tube bundle. The tubes 9 distanced vertically and horizontally from each other by ensuring that the distance between the longitudinal axes of the adjacent heat exchange tubes in a row, which is about 1.5-2.3 diameter of the tubes 9. In the neighbouring height rows 10, providing the distance between the longitudinal axes of the heat exchange tubes 9 of the adjacent rows, constituting 0.6 to 1.5 diameter heat exchange tubes 9.

The tubes 9 in the adjacent height rows arranged in a checkerboard pattern, distantsiruyasj folded elements 11 of each of the overlying series supported his lower tabs on unto them the top of the upper ridges of the pleats adjacent the height of the underlying distancerange element 11 with the education system of support contacts, offset in each height range 0.4-0.6 step tubes 9 in row 10. The thickness of the folded strap 33 is not less than 0.03 diameter heat exchange tubes 9 and distantsiruyasj elements 11 to 14 external and 15 internal branches are located along the length of the heat exchange tubes 9 are preferably the same step. The combination of folded distantsiruyutsa element 11 forms a team, at least in the cross section of the branches 14, 15 spatial carrier grating, at least for the respective branches 14, 15 beam 8 with longitudinal and transverse step is mi-forming elements, the corresponding longitudinal and transverse steps of heat exchange tubes 9 of the beam 8.

In each row step and between the longitudinal axes of the adjacent pipe straight branches 14, 15 is less than or greater than the step b between the longitudinal axes of adjacent tubes in straight 21 knee 16-18, preferably a<b, or step and is equal to step b. Lots bend 12 the two tubes in each odd row has length πR, namely, one of the pipes on the inner knee 17, the other - on the two outer lap 16, 18, for the rest of the pipes odd and even rows of plots bend 13 have a length of πR/2 and articulated in pairs by means of straight portions 21 of different lengths.

Reference sections 37 on the upper and lower edges of the folds are made with the supporting surface in the form of a fragment of a cylindrical surface of radius constituting not more than 35% of the diameter of the tubes 9 which is convex to the outside, or supporting parts 37 on the upper and lower edges of the folds are made with a flat bearing surface.

The collector inlet 5 or the exhaust manifold 6 of the heated medium heat exchanger of the type of block or block-sectional regenerative air heater is made in the form of a cylindrical shell 39 with the opening, in which welded tube sheet 7. Projection on the end face of the tube plate 7 curved section of the shell 39, which forms the end face of the opening located the Jena within the thickness of the tube plate 7. Tube sheet 7 is made with a through hole 40 at the ends of heat exchange tubes 9 of the heat transfer unit 2. Holes 40 are arranged in rows along the height of the tube plate 7 in increments of axes in a row, the components of (1,5-2,8)·d, step series on the height of the tube plate 7 constituting (0,60-0,84)·d, where d is the outer diameter of the tubes 9, and with offset holes 41 in the adjacent rows (0,4÷0,6) step value in the row.

The total area of the through holes 40 in the tube plate 7 at the ends of heat exchange tubes 9 of the heat transfer unit 2 is 56-85% of the overall square pipe field in the plane of the tube plate 7, bounded on the contour formed by the set of conditional direct tangent to the outer edges at the holes 40 in the tube plate 7 and the area of the pipe margin is 0.75÷0,94 of the total area of the frontal projection of the tube plate.

The connection of the shell 39 and tube Board 7 in the plane of the cross-section of the shell is made in the angular range γ=28-75°and the ratio of the area of projection onto a specified plane curvilinear section of the shell 39, which forms the end face of the opening to the area of the projection on the plane of the corresponding end face of the tube plate is 0,048÷0,172.

The side edges of the tube plate 7 is made triangular, with one of the faces 41 are made with the formation of the cross-section of the contact is exporting with a drum 39 support section, and the adjacent faces made - one 42 adjacent to the surface of the tube plate 7, facing the collector inlet 5 or the outlet 6 of the heated medium, with the bevel forming with the plane of the reference corner plot α=(22-29)°and the other 43 facing the outer surface of the tube plate 7, the face is made with a bevel forming with the plane of the reference corner plot β=(25-35)°.

Triangular edge of the tube plate 7 is made with a wide reference area comprising not less than 4.5% of the total thickness of the pipe forming plaque plate 7, the line 42 with the bevel α=(22-29)° made wide, part of 5.9 to 12.5% of total thickness of the plate, and the face 43 with bevel β=(25-35)° executed width, component 79-89,6% of the total thickness of the plate.

Heat exchanger 2 can contain multi-row bundle of heat exchange tubes, consisting of at least two packages of two-way U-shaped pipes 45, 46 forming within each package 44 dvuhvetvevym, for example, the horizontal rows of tubes 45, 46, distanceremaining within row and between the rows from one another, the inlet manifold 5 and an exhaust manifold 6 of the heated medium and located between at least one bypass chamber 47 and the inlet manifold 5 and an exhaust manifold 6 of the heated medium, and a bypass chamber 47 is connected with a heat exchange tubes 45 common to either the pipe Board 48 or separate pipe boards 7, at least part of which is, or which forms part of the wall fence of the inlet manifold 5 and an exhaust manifold 6 of the heated medium and a bypass chamber 47.

The heat exchange unit according to the third variant of execution contains multi-row bundle of heat exchange tubes, consisting of at least two packets 44 two-way U-shaped pipes 45, 46 forming within each package dvuhvetvevym, for example, the horizontal rows of tubes 45, 46, distanceremaining within row and between the rows from one another, the inlet manifold 5 and an exhaust manifold 6 of the heated medium and located between at least one bypass chamber 47 and the inlet manifold 5 and an exhaust manifold 6 of the heated medium, and a bypass chamber 47 is connected to heat exchanger pipes 45 common pipe Board 48 or separate pipe boards 7, at least part of which is, or which forms part of the wall fence of the inlet manifold 5 and an exhaust manifold 6 of the heated medium and a bypass chamber 46. The total area of the through holes in the tube plate 48 or the tube plate 7 at the ends of heat exchanger tubes 45, 46 of the heat exchange unit 2 is 29-85% of the overall square pipe of the field.

Each package 44 through a series of one inner tube 45 series made by bending a length equal to πR, and all other pipe 46 all adovacate 44 is made with two bends each length, equal πR/2, where R is the bend radius, comprising (2,5-6,0)d, where d is the external diameter of the tubes 45, 46, and articulated in pairs by means of linear sections of different lengths.

The number and distribution pipes 45, 46 in the beam taken with respect to the conditions under which the ratio of the volume VTT[m3]occupied heat exchanger tubes 45, 46 in the block 2 and is equal to the total volume of straight branches 50 and knees 51 pipes 45, 46 of the beam, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes 46, minus the volume of the shell environment between the branches 50 and knees 51 pipes 45, 46 of the beam to the total internal volume of the heat exchange unit 2 Vwnb.[m3], defined in the range valuesaverage of 0.56-of 0.85, and the ratio of the total length ∑L [m] pipe beam to the total area of ∑SNTTexternal heat transfer surfaces of the pipes 45, 46 defined by the coefficientcomponents of 0.08-0,32 [m-1].

In each row step and between the longitudinal axis 52 of adjacent pipes 45, 46 rectilinear branches less than 50 or greater than the step b between the longitudinal axes of the knee 51 connecting pipes 45, 46 preferably a<b, or step and is equal to step b.

Step a between the longitudinal axes of adjacent tubes 45, 46 rectilinear branches 50 may be (,5-2,5) d, where d is the outer diameter of the tubes 45, 46, and step b between the axes of adjacent tubes 45, 46 on the straight parts 49 lap 51 is (1,8-2,8)d.

As the heated medium can be used preferably air, including enriched with oxygen, the cooling medium used in the products of combustion after the turbine of the gas turbine installation.

The performance of the regenerative air heater is as follows.

The air used to fire the gas turbine, enters the compressor, which is compressed, and then by pipeline supply through the collector supply of the heated medium pipe and the Board is served in the tubes of the heat exchange units of each section. The temperature after the compressor is about 200°C.

The combustion products of the above composition from the turbine of the gas turbine through the diffuser adjacent to the heat exchange units, get inside the unit sections and wash the tubes with heated air. Supply products of combustion to the heat exchange units is in counter-current with the direction of movement of the heated air, that is, the products of combustion come in heat-exchange unit from the location of the collector drainage of the heated medium. At the entrance to the heat exchanger products down the deposits have a temperature of 520-550° C.

Passing through the heat exchange pipe units, air is heated by the combustion products to a temperature of 440-450°and through the tube Board enters the collector outlet of the heated medium from which the pipeline is input to the furnace GTU.

The combustion products are vented to atmosphere through the confuser, adjacent to the heat exchange units.

1. Heat exchanger - block-sectional heater, characterized in that it contains at least two sections, within each of which is placed at least two heat exchanger units, each of which includes a diffuser inlet and the confuser to drain the cooled environment, the manifold inlet and a manifold outlet of the heated medium, each of which is connected through a separate tube sheets mounted directly in the wall of the corresponding manifold inlet or outlet of the heated environment, with multi-beam four-way heat exchanger tubes, mainly with different number of tubes in the adjacent height rows, predominantly horizontal, with the Department of vertically and horizontally from each other by distantsiruyutsa elements, each heat exchange tube row is made with the number of bends in different pipes beam from four to six, forming four straight branches and connecting them three to the s, the number and distribution pipes in the beam taken with respect to the conditions under which the ratio of the volume VTT[m3]occupied heat exchange tubes in the block and is equal to the total volume of straight branches and knees pipes beam, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes, minus the volume of the shell environment between branches and knees pipes beam to the total internal volume of the heat transfer block Vwnl··[m3], limited by the plate, top cover and end walls of the housing unit, determined in the range of values ofaverage of 0.56-of 0.85, and the ratio of the total length ΣL [m] pipe beam to the total area of ΣSNTTexternal heat exchange surface of the pipe is determined by the coefficientcomponents of 0.08-0,32 [m-1].

2. Heat exchanger according to claim 1, characterized in that each section of the heat exchange units are arranged one above the other, and the preferred number of blocks is four, and the manifold inlet and a manifold outlet of the heated medium is made with possibility of connection to the pipeline inlet and outlet of the heated medium, which is used preferably air, including enriched the content of the m oxygen, the cooling medium used in the products of combustion after the turbine of the gas turbine installation.

3. Heat exchanger according to claim 1, characterized in that the ratio of the combined length ΣL" rectilinear branches of heat exchange tubes, streamlined in the transverse direction, and a total length ΣL [m] of all the heat exchange tubes of the beam is 0.78 to 0.92, while the outer and inner tubes in each row beam each containing at least one bending length equal πR, and bendings of the other pipes in all ranks of the beam made of length equal tothe outer tube of each series, with more pipes than in adjacent rows, one died in length πR, forming the knee, connecting the internal branch of this pipe, and the total number of bends this pipe is five, and the inner tube of each of the rows having more pipes than in adjacent rows, has two bending length πR, each of which forms a knee connecting the respective inner and outer branches of this pipe, and the total number of bends in this pipe is four, step and between the longitudinal axes of the adjacent pipe straight branches is (1,5-2,5)d, where d is the outer diameter of the tubes, step ″b″ between the axes of adjacent tubes on the straight parts of the knees is (1,8-2,8)d, and in each row, step ″and″ m is waiting for longitudinal axes of adjacent tubes rectilinear branches more or less, than step ″b″ between the longitudinal axes of the knee adjacent pipe, and preferably<b, or step and equal step ″b″, and the number of heat transfer tubes interconnecting the height of the beam for odd and even rows respectively m and n, where m is an even number, a n=(m-1), the number of rows of tubes in the bundle of k - preferably odd, and k>3, the tubes in the adjacent height rows placed in a checkerboard pattern with offset (0,4-0,6)a [m], where a is the spacing between the longitudinal axes of adjacent tubes on the straight branches of the same series [m], the number of tubes in the block is preferably 263-563 pieces

4. Heat exchanger according to claim 1, characterized in that every knee pipes of all ranks of the beam, formed by two bends in length each, equalcontains conjugated with gibs rectilinear insert a length that is a multiple of 2a, where a is the spacing between the axes of the same rectilinear branches of adjacent tubes of the row, or every knee pipes of all ranks of the beam, formed by two bends length of each equalcontains conjugated with gibs rectilinear box in length, varying in different pipes range from a value equal to 2a±10% [m] to a value equal to 2A(m-1)±10% [m] for rows with a large number of tubes than in the adjacent height rows, and for the remaining rows to a value equal to a(2n-1)±10% [m], is de

a step between the axes of the same name rectilinear branches adjacent pipe series, [m],

m is the number of pipes in a row with a large number of pipes, mainly an even number of tubes in the odd rows

n is the number of pipes in a row with a smaller number of pipes, mainly an odd number of tubes in the even rows.

5. Heat exchanger heat exchanger - block-section of the heater, characterized in that it contains four branches of the four-way multi-row bundle of heat exchange tubes, arranged in horizontal rows and distanceremaining horizontally and vertically from each other, a manifold inlet and a manifold outlet of the heated medium, each of which is connected with a heat exchange tubes through a separate tube sheets mounted directly in the wall of the corresponding manifold inlet or outlet of the heated medium, each heat exchange tube row is made with four, or five, or six bends of radius R, forming four straight branches and connecting them three tribes, when this plots bend the two tubes in each odd row has length πR, namely one of the pipes on the inner knee, the other on up to two external knees for the rest of the pipes odd and even rows of plots bending length πR/2, and articulated, in pairs through remaining inserts of length N' ifor external knees and Nifor the inner knee and the number of heat transfer tubes interconnecting the height of the beam for odd and even rows respectively m and n, where m is an even number, and n=(m-1), the number of rows of tubes in the bundle of k - preferably odd, and k>3, the tubes adjacent the height of the rows arranged in a checkerboard pattern with offset (0,4-0,6) [m], where a is the step between the longitudinal axes of the rectilinear branches of adjacent tubes of one series, [m], this length N'iand Nistraight inserts the knee of the i-th tube is variable: for an odd number of heat exchange tubes vary from a value equal to 2A±10%, [m], to a value equal to 2A(m-1)±10% [m] and for every even number is the absolute value is equal to a±10% [m], to a value equal to a(2n-1)±10% [m].

6. Heat exchanger according to claim 5, characterized in that the placement of the pipes in the volume occupied, at least one branch beam, accepted with conditions, the first of which is the ratio of the total area of ΣFNTPthe outer heat exchange surface of the pipes that branch beam to the volume ΣVMSoccupied by the shell environment in the zone of active heat transfer branches of the beam and is equal to the volume of the branches of the beam at the outer contour, defined conditional planes related to the external surfaces of extreme heat exchange tubes wet and beam minus the volume occupied by the actual heat exchange tubes in this branch of the beam is in the range of values defined by the coefficientcomponents (84,5-460) [m-1], the second condition is that the ratio of the total volume of ΣVV.S.for the heated medium in the pipe branch beam to the volume VMSdetermined coefficientcomponents 0,78-1,25.

7. Heat exchanger according to claim 5, characterized in that the parameters of each pipe of a number of defined dependencies

Li+1=2l'i+1+2li+1-Δ+2H'i+1+Hi+1+3πR

Li+1- length sweep (i+1)-th pipe series [m];

l'i+1- the length of the outer rectilinear branch (i+1)-th pipe of a number equal to l'i+1=l'i-b[m];

li+1the length of the inner straight branch (i+1)-th pipe of a number equal to the li+1=l'i-Δ[m];

H'i+1- length of straight inserts external knees (i+1)-th pipe of a number equal to N'i+1=N'i-2A [m],

Hi+1- length of straight insertion of the inner knee (i+1)-th pipe of a number equal to Ni+1=Ni+2A [m];

and the step between the longitudinal axes of the same name rectilinear branches adjacent in the row of pipe [m];

b - step between the longitudinal axes of the rectilinear inserts knees adjacent pipes in a row [m];

Δ - empirical value [3-12]·10-3[m];

l'i, liH'iand Hi- options for ″i″ pipes in series, starting from the outer tube to the inner in this series, and step ″and″ is (1,5-2,5)·d, step ″b″ is (1,8-2,8)·d, where d is the outer diameter of heat transfer tube [m], sweep length Lminheat pipe minimum length is not less than 0.75 of the length of the sweep Lmaxthe tubes of maximum length, thus placing the heat exchange tubes in the row selected in compliance with the conditions under which the ratio of the area of the inner surface of heat exchanger tubes on the straight branches of the line, perpendicular to the flow of cooling medium to the volume occupied by the adjacent heat exchange tubes, and is equal to the volume defined conditional planes related to the external surfaces of heat exchange tubes of the row, taking into account the gaps between the pipes is 0,02-0,12 [m-1].

8. Heat exchanger according to claim 5, characterized in that the pipe series contains an even number of tubes, preferably at least two and not more than ten, or it contains an odd number of tubes, preferably of not less than three and not more than nine, while the tubes are in series with a variable distance between the axes of the outer branches, and the lowest value of this p is stoane the pipe, the ends of which are sealed in the extreme next to each other apertures corresponding sibling rows of holes in the tube plate collectors inlet and outlet of the heated medium, preferably air, a heat exchanger unit regenerative air heater, and each subsequent chetyrehvetvevoj pipe number is made covering the previous with the outer side of the outer branches and the highest value of this distance from the pipe, the ends of which are sealed at the most remote from each other apertures corresponding sibling rows of holes in the tube plate collectors inlet and outlet of the heated medium, and two internal branches each subsequent pipe in a series of connecting them with the knee placed outside in the bend formed by the respective branches and connecting the knee of the previous tube in the tube row, at this step ″and″ between the longitudinal axes of the same name rectilinear branches of adjacent tubes in the row is less than or greater than the step ″b″ between the longitudinal axes of the rectilinear inserts knees adjacent pipes in a row, and preferably<b, or step ″and″ equal step ″b″, and, in addition, for each heat exchange tube row distance N between the longitudinal axes of its external rectilinear branches is (30-85)d; length of straight branches l' and l", respectively (74-145)d is (100-135)d, where d is the outer diameter of heat transfer tube [m], the number N of heat exchange tubes in a block with an odd number of rows k pipes in the beam is determined by the dependence N=0,5(k-1)(2m-1)+m, or N number of heat exchange tubes in the unit when there is an even number k of tubes in the bundle is determined by the dependence N=0,5k(2m-1).

9. Heat exchanger according to claim 5, characterized in that between the reservoir inlet and outlet of the heated medium is fixed displacer tube environment, made in the form of a profiled panel with a flat plane located between the collector supply or exhaust of the heated environment, while the square bore manifold inlet or exhaust manifold heated medium is 0.45-0,82 total of the cross-section area of the heat exchange tubes of the beam, and heat exchanger equipped with devices for slinging and manholes-manholes, made in the collector supply and discharge of the heated medium.

10. Heat exchanger heat exchanger of the type of block or block-sectional regenerative air heater, characterized in that it contains a spatial frame, bottom, top cover and end walls of the housing, the diffuser inlet and the confuser for removal of cooling medium, the reservoir inlet and outlet of the heated medium pipe boards and multi-mnogorjadnyh the bundle of heat exchange tubes, forming respectively in each row an even number of straight Novotrubny branches, including at least two internal and two external, United plots with gibs mostly constant for all pipes beam radius, or multi-row bundle of heat exchange tubes, consisting of at least two packages of two-way U-shaped tubes forming within each package dvuhvetvevym, for example, the horizontal rows of tubes, distanceremaining within rows and between rows from each other, a manifold inlet and a manifold outlet of the heated medium and located between at least one bypass chamber, and a manifold inlet and a manifold outlet of the heated medium, and an overflow chamber is connected to the heat exchange tubes of the tube Board or separate pipe boards, at least part of which is, or which forms part of a wall fence collector inlet and exhaust manifold heated medium and a bypass chamber, with the bottom cover and one of the end walls of the housing unit is made in the form of panels with piping of stiffeners forming a flat rod system, and the spatial frame unit is formed by a set of plane truss systems frameworks of these panels with their apex intermediate the uprights and rigidly links the data with them by the casing inlet and outlet of the heated medium, which, in turn, is connected with the bottom of the block and between dvukhkontsevaya diaphragms and the displacer shell environment, with part of the casing inlet and outlet of the heated medium mounted them pipe boards and a displacer shell environment form total developed spatial rigid end wall of the housing unit, and the longitudinal sides of the frame is made with fastening elements respectively of the diffuser and confuser for supply and removal of cooling medium, with each heat exchange tube bundle of the distance H between the longitudinal axes of its external rectilinear branches is (30-85)d; length of straight branches l' and l" respectively (95-145)d and (100-135)d, where d is the outer diameter of heat transfer tube [m].

11. The heat exchange unit of claim 10, characterized in that the displacer shell environment made in the form of a profiled panel with a flat plane, the inner surface of which is located between the reservoir inlet and outlet of the heated medium in the same plane with the outer plane of the tube sheets or in the form of a flat bar welded to the walls of the reservoir inlet and outlet of the heated environment so that its inner surface lies in the same plane with the outer plane of the tube plates, while the heat exchanger block has closed the prisoners on the bottom of the chassis unit discontinuously elements for heat-exchanger tubes in the outer branches of the multi-beam in the form of distantsiruyutsa gratings, and mentioned the tubes are fed through holes distantsiruyutsa gratings, and subsequent rows of heat exchange tubes in the area of internal branches separated discontinuously straps folded form, which is attached to the racks set on the bottom, and also on the bottom of the case attached combs for at least the internal branches of the lower row of heat exchange tubes.

12. The heat exchange unit of claim 10, wherein the cross-sectional area of each of the collector supply and discharge of the heated medium is 1.8 and 3.5 of the total area of the flow area of heat exchange tubes in the unit, and the collector supply and discharge of the heated medium is made with manholes-manholes, spaced from the bottom of the block, with manhole covers-manhole hinged to the casing inlet and outlet of the heated environment can be rotated in the plane perpendicular to the longitudinal axis of symmetry of the collector supply and discharge of the heated medium, and on the inner walls of the reservoir inlet and outlet of the heated medium mounted support, forming a ladder for inspection and maintenance of the reservoir inlet and outlet of the heated medium pipe and boards, and heat exchanger equipped with means for attaching the diffuser inlet and confuser for removal of ohlord the emnd environment, mounted on opposite lateral elements of the spatial framework of the unit, as well as the brackets for attaching the outer insulation.

13. Heat exchanger according to claim 11, characterized in that distantsiruyasj grilles are installed to lock in the case of the regenerative air heater, distantsiruyasj strap folded forms are located on two sides alternating reference plots, one for the top and bottom edges of the folds for the contact corresponding to the lower and upper ledges adjacent the height of the folded strips and the connecting tabs of the two inclined section forming the supporting elements for supporting the beam pipe, while the tubes distanced vertically and horizontally from each other by ensuring that the distance between the longitudinal axes of the adjacent heat exchange tubes in a row, which is about 1.5-2.3 diameter of the tubes and in the neighbouring height rows, ensuring the distance between the longitudinal axes of the heat exchange tubes of adjacent rows, constituting 0.6 to 1.5 diameter of the tubes, with the tubes in the adjacent height rows arranged in a checkerboard pattern, distantsiruyasj folded strips overlying each row supported his lower tabs on unto them the top of the upper ridges of the pleats adjacent the height of Nigel away distantsiruyutsa strap with the education system of support contacts, offset in each height range 0.4-0.6 step tubes in the row, and the thickness of the folded strips is not less than 0.03 diameter heat exchange tubes, and distantsiruyasj elements on the external and internal branches are located along the length of the heat exchange tubes preferably with the same step, while supporting areas on the upper and lower edges of the folds are made with the supporting surface in the form of a fragment of a cylindrical surface of radius constituting not more than 35% of the diameter of the tubes which is convex to the outside, or reference areas on the upper and lower edges of the folds are made with a flat bearing surface.

14. The heat exchange unit of claim 10, characterized in that the inlet manifold or the exhaust manifold of the heated medium is made in the form of a cylindrical shell with an aperture, in which welded tube plate, and a projection on the end face of the tube plate curved section of the shell, forming the end face of the opening, is located within the thickness of the tube plate, which is made with through holes at the ends of heat exchange tubes of a heat exchanger unit, and the holes are arranged in rows along the height of the tube plate in increments of axes in a row, the components of (1,5-2,8)·d, step series on the height of the tube plate comprising (0,60-0,84)·d, where d is the outer diameter of the tubes, and with offset holes Smirnykh series (0,4-0,6) step value in the row, the total area of the through holes in the tube plate at the ends of heat exchanger tubes heat exchanger unit is 56-85% of the overall square pipe field in the plane of the tube plate, bounded by the contour formed by the set of conditional direct tangent to the outer edges at the holes in the tube plate, and the area of the pipe margin is 0.75-0,94 of the total area of the frontal projection of the tube plate, the connection of the shell and tube Board in the plane of the cross-section of the shell is made in the angular range γ=28-75°and the ratio of the area of projection onto a specified plane curvilinear section of the shell, forming the end of the opening to the area of the projection on the plane of the corresponding end face of the tube plate is 0,0480,172, and the side edges of the tube plate is made triangular, with one side made with education in cross-section in contact with the sides of the support section and the adjacent faces made - one adjacent to the surface of the tube plate, facing the collector inlet or outlet of the heated medium, with the bevel forming with the plane of the reference corner plot α=22-29°and the other towards the outer surface of the tube plate face is made with a bevel forming with plane of the reference corner plot β=25-35°.

15. Heat the Lok at 14, characterized in that the triangular edge of the tube plate is made with a wide reference area comprising not less than 4.5% of the total thickness of the pipe forming Board wafer, the edge with bevel α=22-29° made wide, part of 5.9 to 12.5% of total thickness of the plate, and the edge with bevel β=25-35° executed width, component 79-89,6% of the total thickness of the plate.

16. Heat exchanger heat exchanger - block-section of the heater, characterized in that it contains a multi-row bundle of heat exchange tubes, consisting of at least two packages of two-way U-shaped tubes forming within each package dvuhvetvevym, for example, the horizontal rows of tubes, distanceremaining within rows and between rows from each other, a manifold inlet and a manifold outlet of the heated medium and located between at least one overflow chamber, and a manifold inlet and a manifold outlet of the heated medium, and an overflow chamber is connected to the heat exchange tubes of a common pipe Board or separate pipe boards, at least part of which is, or which forms part of a wall fence collector inlet and exhaust manifold heated medium and the bypass chamber, the total area of the through holes in the tube plate or pipe to the hands at the ends of heat exchanger tubes heat exchanger unit is 29-85% of the overall square pipe of the field.

17. Heat exchanger according to item 16, characterized in that in each package through a series of one inner tube series made by bending a length equal to πR, and all other pipes all series bundle with two bends, each of length equal to πR/2, where R is the bend radius, comprising (2,5-6,0)d, where d is the external diameter of the tubes, and articulated in pairs by means of linear sections of different lengths.

18. Heat exchanger according to item 16, characterized in that the number and distribution pipes in the beam taken with respect to the conditions under which the ratio of the volume VTT[m3]occupied heat exchange tubes in the block and is equal to the total volume of straight branches and knees pipes beam, defined by the outer contour of the conditional planes related to the external surfaces of extreme heat exchange tubes, minus the volume of the shell environment between branches and knees pipes beam to the total internal volume of the heat transfer block Vwnl··[m3], defined in the range valuesaverage of 0.56-of 0.85, and the ratio of the total length ΣL[m] pipe beam to the total area of ΣSNTTexternal heat exchange surface of the pipe is determined by the coefficientcomponents of 0.08-0,32 [m-1].

19. Heat exchanger according to item 16, characterized in that h is about in each row, step ″ and″ between the longitudinal axes of the adjacent pipe straight branches is less than or greater than the step ″b″ between the longitudinal axes of the knee adjacent pipe, and preferably<b, or step ″and″ equal step ″b″.

20. Heat exchanger according to item 16, wherein the step ″and″ between the longitudinal axes of the adjacent pipe straight branches is (1,5-2,5)d, where d is the outer diameter of the tubes, step ″b″ between the axes of adjacent tubes on the straight parts of the knees is (1,8-2,8)d.

21. Heat exchanger according to item 16, characterized in that as the heated medium used is preferably air, including enriched with oxygen, the cooling medium used in the products of combustion after the turbine of the gas turbine installation.



 

Same patents:

FIELD: mechanics, heating.

SUBSTANCE: in compliance with the invention, the heat exchanger-modular water heater incorporates one or two modules each comprising, at least, two heat exchanger units integrated by a diffuser to feed a cooling medium and a confuser to withdraw the medium to be cooled, primarily, a turbine hot exhaust gas. It also comprises the manifolds feeding and withdrawing the medium being heated, primarily, air, each communicating, via a tube plate, with, at least, one multi-row bank of multipass heat exchange pipes, the various pipes being furnished with bends varying in number from four to six and forming four rectilinear runs combining their three bends. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. The unit of the heat exchange-modular air heater comprises four runs of the heat exchanger pipe multi-row four-pass bank, the said pipes being laid in horizontal rows spaced in horizontal and vertical planes, the manifolds feeding and withdrawing the medium being heated, each being connected, via separate tube plates, with heat exchanger pipes, each tube plate being mounted in the aforesaid manifold walls. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with the proposed invention, the aforesaid heat exchanger unit-modular air heater comprises a carcass, a bottom, and upper and lower casing walls, a diffuser to feed the medium to be cooled and a confuser to feed the aforesaid medium, manifolds feeding and withdrawing the medium to be heated and furnished with tube plates that form, in every row, an even number of rectilinear multi-pipe banks including, at least, two inner and two outer banks integrated by constant-radius bends. Note here that the unit housing bottom, cover and one of the side walls represent panels with a reinforcement framing elements forming a flat rod systems, while the unit carcass is formed by a set of the aforesaid flat rod systems with intermediate posts inter jointing the aforesaid systems and the manifolds housings rigidly fixed thereto and, in their turn, attached to the unit bottom and inter jointed via two-ring diaphragms and a pipe medium displacer. Note that the parts of the aforesaid manifolds housings with the aforesaid tube plates and pipe medium displacer fitted therein form, when combined, the unit housing rigid face wall while the side walls allow fastening the diffuser and confuser elements. Note here also that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with this invention, the aforesaid heat exchanger unit-modular air heater incorporates a multi-row heat exchanger pipe bank made up of, at least, two bundles of two-pass U-pipes forming, within one bundle, two-run horizontal rows of pipes spaced apart both in rows and between rows, manifolds of feeding and withdrawing the medium being heated and, at least one bypass chamber arranged there between. Note here that the aforesaid manifolds and the bypass chamber communicate with the heat exchanger pipes via a common tube plate or separate tube plates, at least, one part of the said plates forming a part of the aforesaid manifolds enclosure walls. Note also here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs.

EFFECT: higher heat exchange efficiency, lower metal intensity of regenerative air heater.

34 cl, 15 dwg

The heat exchanger // 2141613
The invention relates to heat engineering, primarily for vehicles, namely, devices, providing comfortable conditions in the cabin of a vehicle, and air conditioning equipment

The heat exchanger // 2117892
The invention relates to a heat exchanger, in particular for installations operated with large load variations and/or temperature, for example as a cooler of the cooling air for the gas turbine containing tubes for separation of heat environment, in particular air, and heat-absorbing medium, in particular water, and heat transfer occurs by backflow pipes that serve as flow channels for the heat-absorbing medium, are sinuously between the intake and exhaust manifold pipes and the heat-release environment washes these winding pipe

The heat exchanger // 2080536
The invention relates to heat exchange devices used in membrane technology for temperature control of mediums and products of membrane separation and apparatus alcohol production for carrying out processes of condensation in systems containing gases

The heat exchanger // 2063602
The invention relates to heat exchange devices and can be used in climate installations vehicles, as well as in other industries

The heat exchanger // 2062969
The invention relates to the field of refrigeration technology and can be used as a cooler or condenser systems kondicionirovanija air, mainly vehicles

The heat exchanger // 2058006
The invention relates to heat exchange apparatus and can be used in power, chemical, oil, food, dairy industry and other sectors of the economy

Capacitor // 2028569
The invention relates to transport machinery, and in particular to cooling systems of vehicle bodies, and can be used, in particular, in air conditioning systems

The heat exchanger // 2024813
The invention relates to vehicles, namely, devices, providing comfortable conditions in the cabin of a vehicle

FIELD: mechanics, heating.

SUBSTANCE: in compliance with the invention, the heat exchanger-modular water heater incorporates one or two modules each comprising, at least, two heat exchanger units integrated by a diffuser to feed a cooling medium and a confuser to withdraw the medium to be cooled, primarily, a turbine hot exhaust gas. It also comprises the manifolds feeding and withdrawing the medium being heated, primarily, air, each communicating, via a tube plate, with, at least, one multi-row bank of multipass heat exchange pipes, the various pipes being furnished with bends varying in number from four to six and forming four rectilinear runs combining their three bends. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. The unit of the heat exchange-modular air heater comprises four runs of the heat exchanger pipe multi-row four-pass bank, the said pipes being laid in horizontal rows spaced in horizontal and vertical planes, the manifolds feeding and withdrawing the medium being heated, each being connected, via separate tube plates, with heat exchanger pipes, each tube plate being mounted in the aforesaid manifold walls. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with the proposed invention, the aforesaid heat exchanger unit-modular air heater comprises a carcass, a bottom, and upper and lower casing walls, a diffuser to feed the medium to be cooled and a confuser to feed the aforesaid medium, manifolds feeding and withdrawing the medium to be heated and furnished with tube plates that form, in every row, an even number of rectilinear multi-pipe banks including, at least, two inner and two outer banks integrated by constant-radius bends. Note here that the unit housing bottom, cover and one of the side walls represent panels with a reinforcement framing elements forming a flat rod systems, while the unit carcass is formed by a set of the aforesaid flat rod systems with intermediate posts inter jointing the aforesaid systems and the manifolds housings rigidly fixed thereto and, in their turn, attached to the unit bottom and inter jointed via two-ring diaphragms and a pipe medium displacer. Note that the parts of the aforesaid manifolds housings with the aforesaid tube plates and pipe medium displacer fitted therein form, when combined, the unit housing rigid face wall while the side walls allow fastening the diffuser and confuser elements. Note here also that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with this invention, the aforesaid heat exchanger unit-modular air heater incorporates a multi-row heat exchanger pipe bank made up of, at least, two bundles of two-pass U-pipes forming, within one bundle, two-run horizontal rows of pipes spaced apart both in rows and between rows, manifolds of feeding and withdrawing the medium being heated and, at least one bypass chamber arranged there between. Note here that the aforesaid manifolds and the bypass chamber communicate with the heat exchanger pipes via a common tube plate or separate tube plates, at least, one part of the said plates forming a part of the aforesaid manifolds enclosure walls. Note also here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs.

EFFECT: higher heat exchange efficiency, lower metal intensity of regenerative air heater.

34 cl, 15 dwg

FIELD: technological processes; heating.

SUBSTANCE: utiliser of waste gases heat contains thermal pipes that are made with annular cross sections and through central channels, which are connected with gas supply nozzle, at that condensation sections of pipes are installed in air duct, and evaporating sections - in flue duct, multicyclone. Outlets of central channels of thermal pipes communicate with flue duct bottom part, with which multicyclone element inlets also communicate, which are equipped with vortex generators, and their outlets are connected to nozzles, which are installed in flue duct between thermal pipes, perforated partition that overlaps intertubular space sides with nozzle top ends, and its openings are coaxial to openings of nozzles, at that partition is installed in plane that is inclined at an angle to horizon to provide direction of flows of gas from nozzles purified in cyclone elements in direction to outlet nozzle of flue duct with approximately identical velocities.

EFFECT: efficient purification of gases from hard aerosol particles.

1 dwg

FIELD: domestic facilities.

SUBSTANCE: invention relates to combined heat and power supply plant for household use. Proposed domestic combined heat and power plant contains Stirling engine and water heater. Stirling engine is installed for heating by first burner supplied with fuel gas. Plant contains additionally intake gas duct passing from Stirling engine in contact with fuel gas intake in first burner preliminary heating of fuel gas delivered into first burner and then heating of water which is subsequently heated by water heater. Water heater is provided with second burner. Plant is designed so that outlet gas and gas from second burner form combined flow immediately after heating of water, and combined flow for heating of water is located higher from outlet gas relative to flow. Plant contains additionally cooler of Stirling engine arranged for heating water higher than outlet gas relative to direction of flow.

EFFECT: provision of effective heating of water, reduced cost of heating and provision of compact device.

2 cl, 4 dwg

FIELD: heat power engineering.

SUBSTANCE: heat exchanger comprises conical housing provided with branch pipes for supplying and discharging heating fluid and fluid to be heated. The wall of the housing is provided with the passage L-shaped in cross-section and made of a conical spiral. The inner side of the housing is formed by two belt surfaces shaped into conical spirals whose generatrices are parallel to the generatrices of two adjacent heat exchanging spiral surfaces belonging to the L-shaped passage. The heat exchanger is additionally provided with the inner section that is mounted coaxially to the housing and made of finned hollow twisting core shaped into overturned truncated cone, branch pipe for supplying fluid to be heated into its space, and shaped branch pipe that is in communication with the L-shaped passage of the outer heat exchanging section through fittings. The shaped branch pipe is provided with inner spiral fining. The outer spiral fining of the core and shaped branch pipe is made to mate the screw surfaces of the inner shape of the conical housing. The core of the inner section bears on the impeller-shaped structure provided with the impeller load-bearing members whose ends are secured to the walls of the branch pipe for supplying heating fluid to the heat exchanger.

EFFECT: enhanced efficiency.

1 cl, 2 dwg

Air heater // 2309333

FIELD: mechanical engineering; other industries; production and usage of the air heaters.

SUBSTANCE: the invention provides, that heating up of the air is exercised with the help of the leaving heat-transfer medium. The technical result of the invention is manufacture and repair simplification, the increased reliability and effectiveness of operation and maintenance. The air heater includes the channels of the heat-transfer mediums formed between the thin sheet plates collected in the package by means of the pins located near to the angular stepwise cut-outs of the plates of the spacing bands with holes for the pins and cut-outs near to their butts mounted along accordingly the lateral sides, the front and rear sides of plates. The package of the plates is limited by the lower and upper plates of rigidity with the ledge on their external side, on which the ends of the pins are mounted. The edges of the plates adjacent to the conforming bands are conjugated with their rounded lateral sides and have the bending of the counter direction, and their protruding and adjacent to each other edges are fixed in the clamping component. The front, rear and lateral edges of the extreme plates are adjacent accordingly to the ledges of the upper and lower plates of rigidity. The ledges, the butts of the plates, their cut-outs and the edges of the plates in the area of their cut-outs along their cutting lines form along the perimeters of the air heater faces the flat surfaces for installation of the pipe ducts of the heat-transfer mediums. The positive effect is the increased efficiency of manufacture and operation.

EFFECT: the invention ensures simplification of the air heater manufacture and repair, the increased reliability and effectiveness of its operation and maintenance.

4 cl, 8 dwg

FIELD: heat power engineering.

SUBSTANCE: invention is designed for use of heat of flue gases of boiler units and industrial furnaces for heating air delivered for combustion. According to invention, proposed polyfunctional jet air heater has gas duct accommodating heat chamber in beginning of which cold air branch pipes are laid from cold air header through bottom terminating in slotted nozzles of cold air arranged parallel to each other and directed to side of movement of flue gases and intermediate traps-contractions installed coaxially opposite each cold air nozzle and terminating in intermediate slotted nozzles, and row of hot air traps is arranged in end of heat chamber, said traps being connected through hot air branch pipes with hot air header, cleaning chamber with conical bottom connected through hydraulic lock with drain pipeline in which perforated cassettes are placed parallel to gas flow. Cassettes are covered with layer of calcium hydroxide (Ca(OH)2) and are provided with gas channels in between connected to cover of cassettes and vertical separating plates attached at angle relative to normal movement of flue gases to cover of baffle plates.

EFFECT: reduced content of aggressive and harmful admixtures in cooled flue gases, improved efficiency and ecological safety of devices.

1 dwg

Air heater // 2296270

FIELD: air conditioning or ventilation.

SUBSTANCE: air heater comprises shell with branch pipes for supplying and discharging air, furnace provided with the burning device and chimney, and convection section made of pipes connected with collectors. The furnace is made of a cylindrical sleeve. The pipes of the convection section are arranged in staggered order around the furnace parallel to the cylindrical surface of the furnace. The inlet collector is mounted for permitting connection with the furnace from the side of the burning device, and outlet collector is connected with the chimney from the opposite side. There are transverse baffles between the shell and furnace.

EFFECT: enhanced efficiency and simplified structure.

2 dwg

Air heater // 2296269

FIELD: heat supply systems.

SUBSTANCE: air heater comprises shell with branch pipes for supplying and discharging air, furnace provided with burning device and chimney and mounted inside the shell, and convection member made of pipes connected with the collectors. The furnace is made of a cylindrical sleeve. The pipes of the convection member are arranged in staggered order around the furnace parallel to its cylindrical surface. The inlet collector is connected with the furnace and is mounted in front of the burning device. The inlet collector is made of a sector with a blunt angle. The outlet collector is connected with the chimney and is made of a sector with an acute angle. The device is provided with the intermediate collector. Between the shell and furnace there are transverse baffles.

EFFECT: simplified structure.

FIELD: heat power engineering.

SUBSTANCE: method comprises heating air by means of its direct contact with the flue gas via convection and radiation. The device comprises gas box through which branch pipes for cold air pass and which is provided with slot nozzles for flowing cold air at its ends. The nozzles are parallel to the direction of the flue gas.

EFFECT: enhanced efficiency.

2 dwg

FIELD: heat power engineering, applicable for use of the heat of flue gases of boiler units of industrial furnaces at heating of air supplied for burning.

SUBSTANCE: the air heater has a pile of glass heat-exchanging elements made of heat-resistant low-alkaline glass reinforced by a metal screen fastened with the use of sealings between the two tube plates by bolts and placed in a body with a cover, the heat-exchanging elements are U-shaped or L-shaped and have air ducts having a rough surface of the walls, they are laid in rows on one another between the posts fastened to the supporting beams with formation of a gas conduit between each adjacent row, and are interconnected through elastic seals.

EFFECT: enhanced service reliability and economic efficiency.

2 dwg

Fire air heater // 2246074

FIELD: heating engineering.

SUBSTANCE: fire air heater has air duct which received ring fuel manifold with outlet ports oriented in the direction of air flow. The combustion stabilizer is made of ring cone, V- or U-shaped in cross-section, whose diverging member abuts against the manifold over its periphery from the side of inflowing air. The ignition device is mounted downstream of the fuel manifold.

EFFECT: enhanced efficiency.

2 dwg

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