Plant for combined heat exchange and static mixing with fluid

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

 

The invention relates to an apparatus that combines the heat transfer between the fluid and the coolant environment with static mixing liquid. The invention also concerns the application of this setting.

Patent EP-A-0009638 is a heat exchanger arranged in the form of the reactor, through which the heat of polymerization reaction is given to maintain the optimum temperature. This polymerization reactor includes a tubular housing and built-in items, which can be heat transfer from the polymerized mixture, which is a highly viscous liquid. Built-in items at the same time act as a static mixer of this high-viscosity fluid.

A similar design with case and built-in elements is the device for which were found a variety of applications. A typical application consists in cooling the molten complex polyester, which is formed in the reactor for polycondensation at a temperature of about 290°C. After removal of this product from this reactor, the temperature should be lowered by 10°C, to minimize decomposition of the product. The cooling should be done in the device evenly and in a narrow range of residence time of the melt complex of the polyester to obtain a homogeneous product. Upon receipt thin Polief the situations fibers have very accurately to maintain the homogeneity of the temperature distribution of the melt.

Known from the patent EP-A-0009638 polymerization reactor for the combined conduction heat transfer and static mixing includes a housing in the form of a casing, which runs in the longitudinal direction between the head end and a base end, and built-in elements, which form the heat exchange and mixing structure. Built-in items consist of passing in the longitudinal direction of the pipe, which has a meandering shape. These pipes below sometimes referred to as "heat transfer/mixing tubes". Each pipe has a curved part of the tube, and part of the tube connecting the curved part of the tube and which is straight and parallel to each other. Pipes are laid in the form of a flat layers contacting each other and adjacent to each other straight sections of pipe cross. The environment of the coolant is pumped in the form of internal flow through pipes embedded elements. Pipe connected to the head end, where also is located inlet connection for external flow of the cooled product. The cooled product leaves the plant at the base end to which built-in elements are not connected. Due to the lack of communication between the base end and inline elements eliminates the need for compensation of thermal expansion, which would result is a black expansion of built elements and the housing. Differences in thermal expansion manifested, in particular, when the starting mode, because the coils almost immediately reach the temperature of the coolant, while the body only indirectly and slowly heated polymer in space shirt.

In the known polymerization reactor, the heat exchange is done in turn order, namely in the first half of each pipe in once-through mode and in the second half - in counter-current mode. The inner flow of coolant crossed through the winding form of the external flow of a highly viscous fluid so that flow and countercurrent flow is combined also cross over.

The task of the invention to provide an improved installation, which is functionally linked as known polymerization reactor, however, in this installation, the heat transfer is more efficient. This problem is solved by setting defined in paragraph 1 of the claims.

The installation, which combines the heat transfer between the fluid and the coolant environment with static mixing liquid, includes built-in elements in the casing. The casing is held in the longitudinal direction between the head end and the base end. Built form elements of heat transfer and mixing structure. Wednesday th the media served as an internal flow in pipes embedded elements from the base end to the head end. The liquid is supplied as the external flow from the head end to the base end. Provide reinforcing elements, which stabilize the built-in elements in the longitudinal direction from the effects of pressure gradients generated in the liquid. Built-in items in the main area are connected to the reinforcing elements with the formation of a partial structure which is not susceptible to thermal expansion; and in the side area, which is additional to the main area, they remain as extending in the longitudinal direction of the partial structure, at least partially, without reinforcement.

Dependent claims 2-9 claims relate to preferred variants of execution of the installation according to the invention. The possibility of using the installation according to the invention is subject to paragraph 10 of the claims.

Hereinafter the invention will be explained with attracting drawings.

Fig. 1 represents the head end of the installation according to the invention with a heat exchange/mixing tube,

Fig. 2 represents two layers adjacent to each heat exchange/mixing tubes,

Fig. 3 is a partial longitudinal section of the installation according to the invention,

Fig. 4 represents a further example of the reinforcing elements.

Installation 1 according to the invention is described which is using Fig.1-4. This setting is 1, which combines the heat exchange between the liquid 8 and 7 of the heat carrier with a static mixing liquid 8, includes built-in items 2 and the casing 3 with the tubular body 3', through which passes liquid 8. The treated liquid 8 typically has a relatively high dynamic viscosity of at least 1 PA.with; the most important options for use installation 1, it represents a polymer melt, which has a pressure of, for example, 50 bar (5 MPa).

The casing 3 is held in the longitudinal direction between the head end 4 and the base end 5. Built-in elements 2 form a heat exchanging and mixing structure. Wednesday 7 coolant flows as internal flow in the pipes 21, 22 built-in elements 2 from the base end 5 to the head end 4. Liquid 8 flows as external flow from the head end 4 to the base end 5. Provide reinforcing elements 6 (see Fig. 2 and 4), which stabilize the built-in elements 2 in the longitudinal direction from the effects of pressure gradients generated in the liquid 8. Built-in items 2 in the main area are connected to the reinforcing elements 6 with the formation of partial patterns 2A, which is not affected by thermal expansion. In the side area, which is additional to the main area, built-in items 2 remain without Amirov the treatment or only partially with reinforcement, so a flexible, capable of extension in the longitudinal direction of the partial structure of 2b (rectangle, outlined in phantom line). Thanks to this flexible partial structure 2b is compensating for thermal expansion, which is necessary due to the different thermal expansion of the built-in items 2 and case 3'arising, for example, when starting the setup mode.

Installation 1 according to the invention the heat exchange is performed in one pass, and it is in counter-current mode. In counter-current mode, as is known, in the medium between the inner and outer flow results in a greater temperature difference than in once-through mode. Therefore, the heat exchange can be performed more efficiently than by the multi-turn heat transfer in a known polymerization reactor. Thus, for example, such a reactor, which has a length of 2 m can be replaced by a counter-current reactor, which is about 35 cm shorter (both reactor have the same square cross-section and the same cooling capacity). Simultaneously halved pressure drop internal flow (heat transfer medium in the form of thermal oil).

Heat transfer/mixing pipes, i.e. pipes 21, 22 built-in elements 2 form a flat, stacked in parallel layers 200, aspolozhena which in the transverse direction is indicated in Fig. 1 in phantom lines 204. In each layer 200 pipe 22 (respectively 21) attached to the winding form comprising arcuate curves 201 and parallel straight sections 202 of the pipe, from the input end 25 on the base end 5 to the output end 24 at the head end 4. The straight sections 202 of the pipe adjacent layers 200 intersect at points 203 crossing. In Fig. 3 on the left shows two adjacent tubes 21 and 22, the right only pipe 21.

In the main area of the built-in elements 2 pipes 21 and 22 of two adjacent layers 200 is fixed on the axial, that is, passing in the longitudinal direction, the rod 6', which forms the preferred form of the reinforcing element 6. Rod 6' is fixed on the base end 5 and passes through the rigid partial structure 2A until the flexible partial structure 2b, which provides compensation for thermal expansion. It is also possible form of execution in which the rod 6' mounted on the head end 4, and a flexible partial structure 2b is formed on the base end 5.

Reinforcing elements 6 are preferably formed in the form of belt plates (not shown), the rods 6' (Fig. 2) or the connecting inserts 6” (Fig. 4), which are distributed in many places. Under tape inserts understand the reinforcing elements 6, which are made though comparable with cuts rods, but like with edentulism inserts 6” in Fig. 4 are located with the distribution. On rods 6' or plates provided with recesses in the form of grooves for laying pipes 21 and 22 so that United these plates pipes adjoin or are located at relatively short distances from each other, which are considerably smaller than the thickness of the plates. Preferably the locking connection between the tubes and plates, respectively, between the tubes and the rods 6' are made by soldering in a soldering furnace. Of course, the connection can also be made by welding. The design of the reinforcement, illustrated in Fig. 4, the connecting insert 6” bind every two adjacent straight section 202 of the pipe. They are preferably welded in place.

Inflexible partial structure 2A of the main area is formed so strong that built-in items remain operable, when in the outer flow due to the resistance of the flow having pressure difference in the longitudinal direction between the ends of the installation of at least 10 bar (1 MPa), preferably 40 bar (4 MPa).

Installation 1 according to the invention, generally designed so that the head end 4 and the base end 5 connected with the casing 3, as well as with built-in elements 2 without disassembly. In this case, the built-in items 2 alautranservice. If you need a removable built-in items 2, it may be preferable to use a known device (polymerization reactor).

The casing 3 between the outer wall 30 and the tubular body 3' may contain annular gap 31, through which can be skipped coolant, preferably a part of the environment of the coolant 7 (the inlet 35 and the outlet 34 of the coolant).

Heat transfer/mixing tubes 21, 22 are inserted and fixed in the holes 40 at the head end 4 and the holes 50 in the base end 5. Holes 40 are arranged in two annular segments near the casing; holes 50 are arranged in the plate, crossing the middle of the base end 5. The environment of the coolant 7 is supplied through the inlet pipe 51, and a distribution chamber 517 in separate tubes 21, 22 built-in items 2 and their output is combined in the manifold 417, and the outlet port 41.

For liquid 8 head end 4 has a Central inlet opening 42, and the base end 5 has an outlet 52 located on the side of the center. Both holes 42 and 52 may also be located in the center or offset from the center, or the inlet opening 42 is offset from the center, and the exhaust port 52 is placed in the center.

Installation 1 according to the invention can be used, for example, molten complex is oliefera or other molten polymer (liquid 8), so by cooling to minimize decomposition. Another application is the heating of the polymer to make it more fluid. Another use is in heating or cooling of highly viscous media in the field of food products such as chocolate, caramel, mass or material for chewing gum. As the environment 7 coolant, typically used as a heat-transfer oil. Also applies to other media, such as water or steam.

1. Installation (1) for the implementation of combined heat exchange between the liquid (8) and medium (7) of the heat carrier with a static mixing fluid, and built-in items (2) in the casing (3), which runs in the longitudinal direction between the head end (4) and the base end (5), form a heat exchanging and mixing structure, and provides for the supply of the medium of the coolant in the internal flow in pipes (21, 22) built-in elements from the base end to the head end and fluid flow on the outside of the flow from the head end to the base end, and installation contains reinforcing elements (6, 6', 6") for stabilization built-in elements in the longitudinal direction of the pressure gradients generated by the liquid, and built-in items in the main area associated reinforcing elements in the partial structure (2A), which is e exposed thermal expansion, and in a side region, which is complementary to the main area, remain at least partially reinforced with the formation of a partial structure (2b), capable of thermal expansion in the longitudinal direction.

2. Installation according to claim 1, characterized in that the tube (21, 22) built-in items (2) form of flat, parallel layers (200), in which each of the pipes is winding includes arcuate bends (201) and parallel straight sections (202) pipes and passes from the input end (25) to the output end (24), and direct pipe adjacent layers intersect.

3. Installation according to claim 1 or 2, characterized in that the main area of the built-in elements (2) pipes (21, 22) is fixed on the axial, that is, passing in the longitudinal direction, the rods (6') or connected via elements in the form of belt plates, and the plates or bars provided with recesses in the form of grooves for laying pipes so that the pipes connected with the help of these plates or rods, adjoin or are located at relatively short distances from each other, which are considerably smaller than the thickness of the plates or rods, and fastening connection preferably made by soldering in a soldering furnace.

4. Installation according to claim 1 or 2, characterized in that the tube (21, 22) in the main oblaststroevskaya elements (2) are connected using the connecting inserts (6"), the fastening connection is preferably made by welding.

5. Installation according to claim 1, characterized in that the main area of the built-in elements (2) are made so strong that built-in items remain in working condition when the differential pressure in the longitudinal direction between the ends of the installation of at least 10 bar (1 MPa), preferably 40 bar (4 MPa).

6. Installation according to claim 1, characterized in that the head and base ends (4, 5) connected to the casing (3)and with built-in elements (2) without disassembly and built-in items are fixed.

7. Installation according to claim 1, characterized in that the casing (3) has a ring gap (31) for holding the coolant environment.

8. Installation according to claim 1, characterized in that the tube (21, 22) built-in elements (2) on the head and base ends (4, 5) are inserted and fixed in the holes (40), which are located on the ring near the enclosure or plate, crossing the middle of the head or, respectively, of the base end.

9. Installation according to claim 1, characterized in that the liquid (8) head end (4) has a Central inlet opening (42) and the base end (5) is offset from the center, located at the side of the center of the outlet opening (52), or Vice versa, or both ends (4, 5) holes (42, 52) are arranged offset from the center or in the center.

10. Application installation (1) according to one of claims 1 to 9, and the liquid (8) is a melted polymer.

11. The use of claim 10, and the molten polymer is a melt complex polymer.

12. The use of claim 10, and the environment (7) coolant is a heat-transfer oil.

13. The method of operation of the installation according to claim 1, in which a liquid (8) use of molten polymer, and carry out the cooling of the molten polymer to minimize decomposition of the polymer.

14. The method of operation of the installation according to claim 1, in which a liquid (8) use of molten polymer, and carry out the heating of the molten polymer to enhance the fluidity of the polymer.



 

Same patents:

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.

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FIELD: power engineering.

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FIELD: mechanics, heating.

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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

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The heat exchanger // 2080536
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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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