Heat exchanger-reactor

FIELD: power engineering.

SUBSTANCE: heat exchanger-reactor comprises a vessel in the form of a truncated cone, with a surface concave towards its vertical axis with bottoms, nozzle for coolant inlet and outlet from tube and shell spaces. Inside the vessel 1 there is a tube bundle arranged, comprising at least two rows of cone-shaped pipes fixed with ends in holes of plates along concentric circumferences. Tubes are installed with an inclination simultaneously in two directions: with an inclination to a vertical axis of the vessel and with an additional inclination arranged by displacement of ends in a circumferential direction, i.e. along arcs of circumferences of their installation in tube plates. At the same time inclination angles are arranged within the limits of 0.5-50.0 degrees from the vertical plane stretching via the vertical axis of the vessel.

EFFECT: no necessity to increase input parameters of a coolant, which helps to save thermal and electric power.

5 cl, 4 dwg

 

The invention relates to the field of heat and can be used in power, chemical, petrochemical and other industries, the implementation of the processes followed by large thermal effects, in particular in heterogeneous catalytic oxidation, hydrogenation and dehydrogenation.

Known reactor for carrying out endothermic and exothermic catalytic reactions, consisting of casing, pipe heat transfer, which may be located a solid catalyst. In addition, the heat exchanger includes a peripheral tube of a heat transfer. The reaction mixture passes through the catalyst bed located outside the heat transfer tubes, and then through the catalyst bed located in the annular space of the double pipe heat or inside the heat transfer tubes, and then leaves the apparatus through the peripheral tubes of heat transfer (RF Patent 2379100 IPC C2 B01J 8/02 SW 3/3, published in 2008).

The reactor complex in design. Loading and unloading of the catalyst is difficult. The large resistance of the reaction gases is not justified by the increased efficiency of heat transfer in comparison with other similar purpose devices.

Known shell-and-tube reactor with liquid cooling under pressure for carrying out catalytic reactions containing the beam vertically the x reactor filled with a catalyst tubes, the ends of which are sealed at the top and bottom tube sheets. Tube connected to the housing is sealed by the sealing device and consist of separate sections connected tightly with each other also sealing device. At least one of the tube sheets has a locking element in the form of parallel to the bars holding the disc and the hole for the outlet or inlet pipe. The nodes of the reactor may be connected by welding and do not require heat treatment after Assembly (RF Patent 2392045 IPC B01J 8/06 publ. 2008).

In shell-and-tube reactor above structure is difficult to achieve uniform and the same in all tubes of the heat exchange, as well as the consistency of the speed of removal or supply of heat with the speed of the process taking place in the catalyst tubes. Moreover, remain in the reactor cavity used sufficiently. Disassembly and repair of the reactor with a steam drum is more complicated in comparison with the traditional layout of the reactor.

The known heat exchanger, suitable for chemical processes, in which the passages for the heated medium (cold fluid) gradually increase, and for the heating medium (cooling fluid) is gradually narrowing. The flow rate of environments along the surface t is loobman remains constant. This is achieved by the use of ring sectors. In this unit provide optimal heat transfer (Germany Application DE 102590398 IPC F28D 9/00 publ. 2004).

In such heat exchangers in the annular sectors of the flow parameters at different levels will be different. Moreover, these differences do not coincide with similar differences in neighboring sectors. In such apparatus to achieve high performance is difficult.

The known heat exchanger, which can be used as a chemical reactor, where to align the speed and gradient of the resistance value of the flow area of the first flow pipe space) is uneven is inversely proportional to the density of the filler or the value of the local values of heat flow (U.S. Pat. USA 4108241 class. 165/146, IPC F28F 13/00 publ. 1978).

The heat exchanger can operate only in a narrow range of costs without readjustment.

Closest to the claimed invention and adopted for the prototype is a heat exchanger, comprising a housing in the shape of a truncated cone with the heads, the nozzles of the input and output of fluids in the tubing and annulus, tube, holes are fixed pipe in the form of truncated cones inclined at an angle relative to the Central vertical axis of the casing, and pipes, in addition to the Central, Ni is sustained fashion tilted by shifting all the circles of their placement in the tube sheet holes 0.5-50.0 degrees, and the holes in the tube sheets are made under the truncated cone of the same height with closed tops (the Patent for useful model RF 101162 IPC F28D 15/00 publ. in 10.01.2011 year). However, in the known heat exchange apparatus underutilized volume, which leads to insufficient high heat transfer rate and, in addition, creates additional stresses occurring during operation, caused by centrifugal forces, which reduces the reliability of the device.

The technical result, which is aimed by the invention, is to increase heat transfer rate and efficiency of the process in the rector, as well as improving the reliability in the operation.

The technical result is achieved by the fact that in the exchanger-reactor, comprising a housing in the shape of a truncated cone with the heads, the nozzles of the input and output of the heat transfer pipe and the annular space, the tube, the holes are fixed in concentric circles inclined to the axis, at least two rows of tubes, in addition, the pipe will also inclined offset by arcs of circles, placing them all on one of the tube sheets, the Central tube, with at least one row of tubes inclined offset by arcs of circles, placing them all on one of Trubin the x arrays in the opposite direction relative tilt offset in the adjacent row or in adjacent rows.

Pipes are in the form of a truncated cone.

The surface is made concave to its vertical axis, with maximum concavity is located at a distance 02,58-0,65 from the big tube.

In the Central tube are thermal and other sensors.

Figure 1 shows a General view of the exchanger-reactor (without insulation and supporting devices), figure 2 - General view of the tube bundle, with at least two rows of tubes and tube sheets (without casing and bottoms), figure 3 is a view in the direction of the tube bundle in figure 2 (without tube sheets), figure 4 - view of B in the direction of the tube bundle (without tube sheets).

The exchanger-reactor (1) includes a housing 1 in the form of a truncated cone with a concave in the direction of its vertical axis surface with the heads 2, 3, the branch pipes 4, 5 input and output coolant pipe space, and the nozzles 6, 7 input and output coolant annulus. Inside the housing 1 posted by tube bundle (figure 2). It consists of at least two rows of conical tubes 8, 9, arranged in concentric circles and fixed ends in the tube sheets 11, 12. The holes in the tube sheets 11, 12 are made under the truncated cones of the same height closed small peaks. The Central pipe 10 conical shape, its axis coincides with the vertical OS is Yu of the housing 1. Inside the tube 10 is the casing for thermal and other sensors. Pipes 8, 9 are tilted simultaneously in two directions: with an inclination to the vertical axis of the housing 1 and with the additional tilt, executed by displacement of the ends in the circumferential direction, i.e. the arcs of circles, placing them in the tube sheets 11 or 12. When this inclination is made in the range of 0.5 to 50.0 degrees from the vertical plane passing through the vertical axis of the housing 1. The direction of the additional bending of the pipes 8, 9 are made of alternating. For example, the pipe 9 of the second row from the edge of the beam is tilted in the opposite direction relative to the pipe 8 of the first extreme series. Can be selected any other sequence alignments with opposite slopes. Preferably, if the striping will be done in two or more rows from the last row.

As a result of implementation of the two types of tilt achieved by reducing the diameter of the tube bundle. This decrease gradually develops in the mind's movement from the tube sheets 11, 12 in the direction of the middle pane. The minimum diameter is reached at a distance of 0.58-0.65 altitude drawn from a large tube 11.

At this altitude the housing 1 has a maximum contraction. The distance from the inner surface of the housing 1 to the tube bundle is equal to the distance between the outer is mi surfaces of the pipes 8, 9, and the tube sheets according to the calculations.

The exchanger-reactor operates as follows. In the case of the organization of parallel heat exchange, the heat transfer medium or the reaction mixture pipe space is supplied through the pipe 4 and the bottom 3 of small diameter pipes 8, 9, 10, passing through it, reacting and exchanging heat through their walls with coolant annulus, goes through the bottom 5 of a large diameter and the pipe 6. The stream tube area due to bending of the pipes 8, 9 seeks to acquire twisted appearance. The angle of attack of the flow tube space is directed towards the inner walls of the pipes 8, 9. The coolant annulus enters the exchanger-reactor through pipe 6 and, giving or receiving heat through the outer walls of the pipes 8, 9, 10, the coolant pipe space, exits through pipe 7. When organizing a counter-current heat exchange, the heat transfer medium or the reaction mixture pipe space passes the same path as the fluid annulus flows through the pipe 7 and exchanging heat through the pipes 8, 9, 10 with the fluid or reaction mixture pipe space, out through the pipe 6. Sometimes it is advantageous to apply the coolant pipe space or the reaction mixture through the pipe 5 from the side of the large diameter heat is obmennik-reactor. In this case, threads are organized in opposite directions.

The advantages of the proposed heat exchanger-reactor that if a row of tubes in the annular space occurs a twisting flow in one direction, then in the next another row is formed by twisting in the opposite direction. The centrifugal force produced by the bending of the same profile, are balanced. The axial load from the stream pipe space is distributed more evenly.

When the direction of flow from the periphery to the center, from input to output and circumference, the flow becomes complex in the directions of the wave shape, more uniform in all directions. A slight increase in the flow resistance caused by the change of direction of the flow in contact with the pipe, the slopes are opposite, increasing part of the flow going around the circumference, ensuring the completeness of the volume. At the same time disappear prevailing speed of the individual currents. Washing the external surfaces of the pipe approaches the cross-washing, and the total resistance of the exchanger-reactor does not increase.

In the tube space appears secondary multidirectional circulation, resulting in cross-section pipes, intensificar heat transfer and p is ocessi in the reactor.

In the use case with a concave surface and implementation of two types of bending tubes is further reduced bore annulus. This leads to additional increase in the flow rate, therefore, to enhance heat transfer in the area where the most likely overheating or lack of heat in the tube space, in addition, multi-directional bending of pipes counterbalance the centrifugal force, thereby increasing the reliability of the reactor during operation. There is no need to amplify the input parameters of the coolant annulus, thus saving thermal and/or electrical energy. Thus, in the proposed heat exchanger-reactor of the completeness of thermal energy is increased by 6-7%.

Due to more uniform and intense heat, decrease or complete disappearance of zones of overheating or overcooling, as shown by preliminary calculations, the yield of the target products in processes such as dehydrogenation and partial oxidation of hydrocarbons is increased to 10%.

1. The exchanger-reactor, comprising a housing in the shape of a truncated cone with the heads, the nozzles of the input and output of the heat transfer pipe and the annular space, the tube, the holes are fixed concentrically on the circles inclined to the axis, at least two rows of tubes, in addition, the pipe will also inclined offset by arcs of circles, placing them all on one of the tube sheets, the Central tube, wherein, in at least one row of tubes inclined offset by arcs of circles, placing them all on one of the tube sheets in the opposite direction relative tilt offset in the adjacent row or in adjacent rows.

2. The exchanger-reactor according to claim 1, characterized in that the pipes are in the form of a truncated cone.

3. The exchanger-reactor according to claim 1, characterized in that the surface of the body is concave towards its vertical axis.

4. The exchanger-reactor according to claim 1, characterized in that the Central tube are thermal and other sensors.



 

Same patents:

FIELD: power engineering.

SUBSTANCE: plant comprises a jacket that passes in longitudinal direction between the head end and the base end, inside which there are inbuilt elements that form a heat-exchange and a mixing structure. Besides, there is coolant medium supply as an internal flow into pipes of inbuilt elements from the base end to the head end and fluid supply as an external flow from the head end to the base end. The plant comprises reinforcement elements to stabilise inbuilt elements in longitudinal direction from pressure gradients developed by fluid, besides, in the main area they are joined with reinforcement elements into a partial structure, which is not exposed to thermal expansion, and in the side area they remain at least partially non-reinforced to form a partial structure capable of thermal expansion in longitudinal direction.

EFFECT: increased efficiency of heat exchange, improvement of the plant.

14 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: heating device of high-viscous oil products and their mixtures includes cylindrical housing with inlet and outlet covers with the appropriate inlet and outlet connection pipelines, tube grids located inside the housing, and distributing inlet and outlet boxes equipped with inlet and outlet tubes respectively and interconnected with ends of tube grids for pumping of heat carrier. Housing is located vertically, lower outlet cover is tapered with outlet connection pipe in lower part, which is enveloped below that cover with inlet distribution box which has the possibility of exchanging the heat with taper surface of lower cover, and upper inlet cover is equipped with inlet connection pipe installed coaxially with the housing; at that, tube grid is made in the form of hopper bent inside the housing and converging downwards; inside that hopper there located is baffle plate distributing the flow of oil products to tube grids and uniformly connected along the perimetre at least to three tubes of the grid with heat-conducting plates.

EFFECT: device is reliable-to-operate, and uniform resistance to flow of oil products is provided.

2 dwg

Heat exchanger // 2384802

FIELD: heating.

SUBSTANCE: invention refers to heat engineering and can be used as heat exchanger of nuclear power plant operating in variable load conditions. In heat exchanger containing a bundle of heat exchange zigzag-shaped tubes with external finning in straight sections, which is installed in the housing, spacers arranged between tubes of the bundle so that mixing chambers are formed in the bending area of the latter, the spacers have thickenings in straight tube sections and grooves evenly spaced relative to them so that an individual channel is formed around each tube, which interconnects mixing chambers to each other.

EFFECT: providing forced heat exchange for obtaining small overall dimensions of equipment owing to increasing uniform temperature field in cross section of tube bundle, and decreasing relative tube deformation at thermal elongations.

4 dwg

Heat exchanger // 2378595

FIELD: heating systems.

SUBSTANCE: invention refers to heat engineering and can be used during arrangement of high thermally stressed heat exchanger of nuclear power plant. In heat exchanger consisting of bank of heat exchange coil tubes the ends of which are fixed in tube sheets arranged in the form of a platen, straight sections of several coil tubes are located consequently in one plane, and bent sections are opened to the side from location plane of straight sections; at that, opening of bends of opposite ends, straight sections, is made to different sides.

EFFECT: providing maximum compactness of tube bank of heat exchanger and reaching high degree of heat exchange efficiency owing to arrangement of heat removal surface itself during operation, increasing life time of reliable operation of heat exchanger design at high specific thermal stresses of the volume occupied with it.

5 dwg

Heat exchanger // 2341751

FIELD: power engineering.

SUBSTANCE: invention can be used in feed water heaters of thermal and nuclear power plants. Proposed heat exchanger consists of a shell inside which a central header and vertical tube platens connected with their ends to appropriate central header chambers are installed. At that each platen is made at least of one "П"-shaped section with transverse parts installed in the shell one above the other, and intermediate part wherein external tubes are installed longitudinally on the shell side, and internal tubes are located on the header side. Internal tubes of the intermediate section part are made with additional sections bent in the direction of central header and located between transverse parts of this section. In this case average tube length makes bigger in each platen, which leads to less number of tubes used in each platen, and therefore to velocity increase in tube and intertube spaces of platens and heat exchange intensification, which finally reduces heat exchanger specific amount of metal.

EFFECT: reducing thermal and hydraulic maldistributions in platens, which also improves platen heat exchange and reduces to a greater degree the heat exchanger specific amount of metal.

2 dwg

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

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

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: 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

Heat exchanger // 2341751

FIELD: power engineering.

SUBSTANCE: invention can be used in feed water heaters of thermal and nuclear power plants. Proposed heat exchanger consists of a shell inside which a central header and vertical tube platens connected with their ends to appropriate central header chambers are installed. At that each platen is made at least of one "П"-shaped section with transverse parts installed in the shell one above the other, and intermediate part wherein external tubes are installed longitudinally on the shell side, and internal tubes are located on the header side. Internal tubes of the intermediate section part are made with additional sections bent in the direction of central header and located between transverse parts of this section. In this case average tube length makes bigger in each platen, which leads to less number of tubes used in each platen, and therefore to velocity increase in tube and intertube spaces of platens and heat exchange intensification, which finally reduces heat exchanger specific amount of metal.

EFFECT: reducing thermal and hydraulic maldistributions in platens, which also improves platen heat exchange and reduces to a greater degree the heat exchanger specific amount of metal.

2 dwg

Heat exchanger // 2378595

FIELD: heating systems.

SUBSTANCE: invention refers to heat engineering and can be used during arrangement of high thermally stressed heat exchanger of nuclear power plant. In heat exchanger consisting of bank of heat exchange coil tubes the ends of which are fixed in tube sheets arranged in the form of a platen, straight sections of several coil tubes are located consequently in one plane, and bent sections are opened to the side from location plane of straight sections; at that, opening of bends of opposite ends, straight sections, is made to different sides.

EFFECT: providing maximum compactness of tube bank of heat exchanger and reaching high degree of heat exchange efficiency owing to arrangement of heat removal surface itself during operation, increasing life time of reliable operation of heat exchanger design at high specific thermal stresses of the volume occupied with it.

5 dwg

Heat exchanger // 2384802

FIELD: heating.

SUBSTANCE: invention refers to heat engineering and can be used as heat exchanger of nuclear power plant operating in variable load conditions. In heat exchanger containing a bundle of heat exchange zigzag-shaped tubes with external finning in straight sections, which is installed in the housing, spacers arranged between tubes of the bundle so that mixing chambers are formed in the bending area of the latter, the spacers have thickenings in straight tube sections and grooves evenly spaced relative to them so that an individual channel is formed around each tube, which interconnects mixing chambers to each other.

EFFECT: providing forced heat exchange for obtaining small overall dimensions of equipment owing to increasing uniform temperature field in cross section of tube bundle, and decreasing relative tube deformation at thermal elongations.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: heating device of high-viscous oil products and their mixtures includes cylindrical housing with inlet and outlet covers with the appropriate inlet and outlet connection pipelines, tube grids located inside the housing, and distributing inlet and outlet boxes equipped with inlet and outlet tubes respectively and interconnected with ends of tube grids for pumping of heat carrier. Housing is located vertically, lower outlet cover is tapered with outlet connection pipe in lower part, which is enveloped below that cover with inlet distribution box which has the possibility of exchanging the heat with taper surface of lower cover, and upper inlet cover is equipped with inlet connection pipe installed coaxially with the housing; at that, tube grid is made in the form of hopper bent inside the housing and converging downwards; inside that hopper there located is baffle plate distributing the flow of oil products to tube grids and uniformly connected along the perimetre at least to three tubes of the grid with heat-conducting plates.

EFFECT: device is reliable-to-operate, and uniform resistance to flow of oil products is provided.

2 dwg

FIELD: power engineering.

SUBSTANCE: plant comprises a jacket that passes in longitudinal direction between the head end and the base end, inside which there are inbuilt elements that form a heat-exchange and a mixing structure. Besides, there is coolant medium supply as an internal flow into pipes of inbuilt elements from the base end to the head end and fluid supply as an external flow from the head end to the base end. The plant comprises reinforcement elements to stabilise inbuilt elements in longitudinal direction from pressure gradients developed by fluid, besides, in the main area they are joined with reinforcement elements into a partial structure, which is not exposed to thermal expansion, and in the side area they remain at least partially non-reinforced to form a partial structure capable of thermal expansion in longitudinal direction.

EFFECT: increased efficiency of heat exchange, improvement of the plant.

14 cl, 4 dwg

FIELD: power engineering.

SUBSTANCE: heat exchanger-reactor comprises a vessel in the form of a truncated cone, with a surface concave towards its vertical axis with bottoms, nozzle for coolant inlet and outlet from tube and shell spaces. Inside the vessel 1 there is a tube bundle arranged, comprising at least two rows of cone-shaped pipes fixed with ends in holes of plates along concentric circumferences. Tubes are installed with an inclination simultaneously in two directions: with an inclination to a vertical axis of the vessel and with an additional inclination arranged by displacement of ends in a circumferential direction, i.e. along arcs of circumferences of their installation in tube plates. At the same time inclination angles are arranged within the limits of 0.5-50.0 degrees from the vertical plane stretching via the vertical axis of the vessel.

EFFECT: no necessity to increase input parameters of a coolant, which helps to save thermal and electric power.

5 cl, 4 dwg

FIELD: heating.

SUBSTANCE: in the heat exchanging device the finned heat exchanging tube with the diameter d is made serpentine-shaped with an outer finning diameter D and the thickness of the fins L1, located at a distance L2 from each other. The amplitude of the serpentine A on the outer finning diameter is not less than A=D×(2+1L1+L2L11), the wave period of the serpentine P is not less than P=2D×(1+1L1+L2L11).

EFFECT: intensification of heat exchanging due to turbulence in the flow passing inside the finned serpentine-shaped tubes, and increase in the area of heat exchanging of the device.

23 cl, 8 dwg, 2 tbl

FIELD: heating.

SUBSTANCE: heat exchange device includes elements in the form of spirally wound pipes with alternating straight and ring-shaped sections located opposite each other. The elements are installed in each other with ring-shaped sections. The straight sections of adjacent elements in the heat exchange device are located on one side, and the ring-shaped sections are located on the other side; with that, the elements in the cross section of the heat exchange device are located about its axis in a circumferential direction, with orientation of the ring-shaped sections to the above said axis. The straight sections in the elements can be located in different planes at an angle to each other. In this case, rings of the ring-shaped sections have different diameters, which are maximum in the middle of the elements and minimum in its end sections. At alignment of direction of windings of the adjacent elements, the planes that adjoin the outer side of the ring-shaped sections intersect the axis of the heat exchange device at an acute angle. At mutually opposite direction of the windings of the adjacent elements, the above planes and the axis are parallel.

EFFECT: reduction of overall dimensions of the heat exchange device due to a sealed layout of adjacent elements in it; possibility of arranging it in cylindrical, annular, toroid-shaped and spherical cavities.

4 cl, 14 dwg

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