CN112728966B - A four-pass plate-tube heat exchanger and a method of using the same - Google Patents
A four-pass plate-tube heat exchanger and a method of using the same Download PDFInfo
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- CN112728966B CN112728966B CN202110078413.1A CN202110078413A CN112728966B CN 112728966 B CN112728966 B CN 112728966B CN 202110078413 A CN202110078413 A CN 202110078413A CN 112728966 B CN112728966 B CN 112728966B
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- heat exchanger
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 239000000110 cooling liquid Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000005494 condensation Effects 0.000 claims abstract description 10
- 238000009833 condensation Methods 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/224—Longitudinal partitions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a four-flow plate and tube type heat exchanger, which comprises a cylinder, wherein end plates are fixed at two ends of the cylinder to form a heat exchanger shell, a baffle plate is fixed in the shell along the axial direction of the heat exchanger shell, the shell is divided into a plate-pass heat exchange cavity and a tube-pass heat exchange cavity by the baffle plate, a plurality of heat exchange plates are arranged in the plate-pass heat exchange cavity in parallel with the end plates, four through holes are formed in the heat exchange plates and the end plates, fluid collecting and distributing inlet and outlet pipes are fixed on the through holes, the heat exchange plates, the end plates, the cylinder and the baffle plate jointly form a plurality of small cavities, and two fluid collecting and distributing holes in the fluid collecting and distributing inlet and outlet pipes leak out in each small cavity, so that a phase-changeable gas condensing cavity and a phase-changeable cooling liquid cavity which are mutually alternate are formed. According to the four-flow-plate tubular heat exchanger and the application method thereof, the circulating cooling liquid and the low-temperature cooling liquid are adopted in one heat exchanger to perform heat exchange condensation and cooling on the phase-changeable fluid, so that the space is saved, and the heat exchange efficiency is improved.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a four-flow plate and tube type heat exchanger and a use method thereof.
Background
A heat exchanger (heat exchanger) is a device that transfers a portion of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. The heat exchanger plays an important role in chemical industry, petroleum, power, food and other industrial production, and can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in the chemical industry, so that the heat exchanger has wide application range.
At present, the heat exchanger used at present can not ensure sufficient heat exchange and accurate temperature control in the heat exchange process with phase change, even the double-flow Cheng Guanban heat exchanger, because the plate-side heat exchange and the tube-side heat exchange use the same cooling liquid, the temperature of the flowing liquid can not be accurately controlled, a plurality of heat exchangers are required to be connected in parallel or in series, and the continuous work can be completed, thereby the whole manufacturing cost and occupied space of the whole heat exchange system are increased.
Therefore, how to provide a four-flow plate and tube heat exchanger and a using method thereof is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a four-flow plate-tube heat exchanger and a method for using the same, in which a circulating coolant and a low-temperature coolant are used to exchange heat, condense and cool a phase-changeable fluid, so that not only can space be saved and heat exchange efficiency be improved, but also the temperature of the flowing condensed fluid can be precisely controlled by controlling the exchange areas of the plate pass and the tube pass and the temperature and flow of the two coolants.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A four-flow-path plate-tube heat exchanger comprises a cylinder, wherein two ends of the cylinder are fixedly provided with end plates to form a heat exchanger shell, a baffle plate is axially fixed in the shell and divides the shell into a plate-path heat exchange cavity and a tube-path heat exchange cavity, a plurality of heat exchange plates are arranged in the plate-path heat exchange cavity and are parallel to the end plates, four through holes are formed in the heat exchange plates and the end plates, fluid collecting and distributing inlet and outlet pipes are fixedly penetrated through the through holes, the heat exchange plates, the end plates, the cylinder and the baffle plate form a plurality of small cavities together, two fluid collecting and distributing holes in the fluid collecting and outlet pipes are arranged in each small cavity, so that a phase-changeable gas condensation cavity and a cooling liquid cavity are formed, a plurality of heat exchange tubes are vertically and fixedly arranged in the tube-path heat exchange cavity and are arranged in the tube-path heat exchange cavity, holes are formed in the positions, close to the two end plates, the low-temperature cooling liquid inflow pipes and the low-temperature cooling liquid flow outlet pipes are fixedly connected, the condensate flows into and out of the two ends of the tube heat exchange cavity, the condensate flows into and flows into the two ends of the heat exchange cavity, and the condensate flow into and flows into the two end plates and the two ends of the condensate collecting and outlet pipes are respectively.
The four-flow-path plate-tube heat exchanger disclosed by the invention has the advantages that the phase-change gas can be condensed after the heat exchange of the plate-path heat exchange cavity, the condensed liquid enters the tube-path heat exchange cavity to exchange heat and finally flows out of the cooling condensate outflow pipe, the phase-change gas adopts circulating cooling liquid and low-temperature cooling liquid to exchange heat, condense and cool the phase-change fluid in one heat exchanger, the space can be saved, the heat exchange efficiency is improved, and the temperature of the outflow condensed liquid can be accurately controlled through controlling the temperature and the flow of the tube-path heat exchange area and the two cooling liquids.
Preferably, the four through holes formed in the heat exchange plate and the end plate are respectively an air flow hole, a condensate outflow hole, a coolant inflow hole and a coolant outflow hole, and the air flow hole, the condensate outflow hole, the coolant inflow hole and the coolant outflow hole respectively correspond to and penetrate through fluid collecting and distributing inlet and outlet pipes respectively, namely a gas inflow pipe, a condensate outflow pipe, a coolant inflow pipe and a coolant outflow pipe, and the condensate outflow pipe is communicated with the condensate inflow pipe through a connecting pipe.
The technical scheme has the advantages that the four pipes with different use functions, namely the gas inflow pipe, the condensate outflow pipe, the cooling liquid inflow pipe and the cooling liquid outflow pipe, are all formed by fluid collecting and distributing inflow pipes, are used in pairs, each pair of pipes is staggered with the fluid collecting and distributing Kong Qiahao of the other pair of pipes, and the gas inflow pipe and the condensate outflow pipe are paired, and the cooling liquid inflow pipe and the cooling liquid outflow pipe are paired so as to promote the corresponding phase-changeable gas condensation cavity and the cooling liquid cavity respectively.
Preferably, the apertures of the fluid distribution holes are equal to the spacing distance.
The technical scheme has the beneficial effects that the fluid collecting and distributing holes are uniformly distributed, so that heat exchange is more uniform.
Preferably, the spacing between adjacent fluid distribution holes is at least greater than the thickness of the heat exchanger plate.
The technical scheme has the beneficial effect of ensuring that the phase-changeable gas condensation cavity and the cooling liquid cavity form independent cavities.
Preferably, the heat exchange tube is provided with an upper deflector and a lower deflector perpendicular to the heat exchange tube, and the lowest end of the upper deflector is lower than the highest end of the lower deflector.
The technical scheme has the beneficial effects that the low-temperature cooling liquid can be uniformly distributed in the tube side heat exchange cavity, and the heat exchange uniformity is ensured.
Preferably, the half seal head is fixed at two ends of the cylinder through an inner flange, an outer flange, bolts and nuts, the fixing position of the half seal head is located at the outer side of the end plate corresponding to the tube side heat exchange cavity, and a half seal head gasket is arranged between the half seal head and the end plate.
The technical scheme has the beneficial effects that the inner flange, the outer flange, the bolts and the nuts can ensure that the connection between the half seal head and the end plate is stable, and the half seal head gasket can prevent condensate in the half seal head from leaking outwards.
Preferably, the semi-seal head is a semi-circular arc body with an inner cavity and comprises a circular arc part and a flat plate part, and a condensate inlet and outlet are formed in the circular arc part.
The technical proposal has the advantages that the condensed liquid in the heat exchange tube is convenient to collect and then flows out through the cooling condensed liquid outflow tube.
Preferably, the partition plate is welded and fixed with the cylinder, and two ends of the connecting pipe are welded and fixed with the condensate outflow pipe and the condensate inflow pipe respectively.
The technical scheme has the beneficial effects of firm welding and fixing and simple process.
Preferably, the end plate is provided with a plurality of heat exchange tube holes at positions corresponding to the heat exchange tubes, and the fluid collecting and distributing holes are square holes or round holes.
The technical scheme has the beneficial effects that the plurality of heat exchange tube holes are used for enabling condensate in the heat exchange tube to flow into the inner cavity of the semi-seal head, and the shape of the fluid collecting and distributing holes can be freely selected according to actual needs.
The invention also discloses a use method of the four-flow plate-tube heat exchanger, after the phase-changeable gas enters the plate-tube heat exchange cavity from the gas inflow tube, the cooling liquid cavity and the phase-changeable gas condensation cavity are arranged alternately, the phase-changeable gas is condensed after entering the plate-tube heat exchange cavity, and the condensed liquid enters the tube-tube heat exchanger for heat exchange through the condensate outflow tube, the connecting tube and the condensate inflow tube and finally flows out from the cooling condensate outflow tube.
Compared with the prior art, the four-flow plate and tube heat exchanger and the use method thereof can simultaneously adopt circulating cooling liquid and low-temperature cooling liquid to exchange heat, condense and cool phase-changeable fluid in one heat exchanger, so that not only can space be saved and heat exchange efficiency be improved, but also the temperature of the flowing condensed fluid can be precisely and purely controlled through the exchange area of a control plate pass and a tube pass and the temperature and flow of the two cooling liquids.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the external shape of a four-flow plate tube heat exchanger provided by the invention.
Fig. 2 is a schematic diagram of an internal structure of the four-flow plate tube heat exchanger provided by the invention.
Fig. 3 is a schematic side view of a four-flow plate tube heat exchanger provided by the invention.
Fig. 4 is a schematic diagram of fluid flow heat exchange of four fluids in a heat exchanger according to the present invention.
Fig. 5 is a schematic view of a heat exchanger plate provided by the present invention.
Fig. 6 is a schematic view of a fluid collecting and distributing inlet and outlet pipe provided by the invention.
Fig. 7 is a schematic diagram of a semi-seal head provided by the invention.
Fig. 8 is a partial enlarged view of the internal structure of the plate heat exchange cavity provided by the invention.
Fig. 9 is a schematic view of an end plate according to the present invention.
Wherein, each reference sign is:
1-cylinder, 2-end plate, 3-heat exchange plate, 4-separator, 5-semi-seal, 6-seal gasket, 7-lower baffle, 8-upper baffle, 9-gas inflow tube, 10-condensate outflow tube, 11-coolant inflow tube, 12-coolant outflow tube, 13-condensate inflow tube, 14-cooling condensate outflow tube, 15-low temperature coolant inflow tube, 16-low temperature coolant outflow tube, 17-connecting tube, 18-inner flange, 19-outer flange, 20 bolt, 21 nut, 22-air flow hole, 23-condensate outflow hole, 24-coolant inflow hole, 25-coolant outflow hole, 26-fluid collecting and distributing inflow tube, 27-heat exchange tube, 28-fluid collecting and distributing hole, 29-semi-seal flange outer face, 30-semi-seal flange inner face, 31-phase-changeable gas condensing cavity, 32-inlet and outlet cooling liquid cavity, 33-condensate, 34-heat exchange tube hole, 51-arc-shaped part, 52-flat plate part.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As can be seen from fig. 1,2, 3 and 4, the embodiment of the invention discloses a four-flow plate tube type heat exchanger, which comprises a cylinder 1, an end plate 2, a heat exchange plate 3, a baffle plate 4, a semi-seal head 5, a semi-seal head gasket 6, a lower guide plate 7, an upper guide plate 8, a gas inflow tube 9, a condensate outflow tube 10, a cooling liquid inflow tube 11, a cooling liquid outflow tube 12, a condensate inflow tube 13, a cooling condensate outflow tube 14, a low-temperature cooling liquid inflow tube 15, a low-temperature cooling liquid outflow tube 16, a connecting tube 17, an inner flange 18, an outer flange 19, a fluid collecting and distributing inflow tube 26 and a heat exchange tube 27. The heat exchange device comprises a cylinder 1, a heat exchange cavity, a tube side heat exchange cavity, a plurality of heat exchange plates 3, four through holes, a plurality of small cavities, a plurality of phase-changeable gas condensing cavities and a plurality of cooling liquid cavities, wherein the two ends of the cylinder 1 are respectively fixed with end plates 2 to form a heat exchanger shell, a baffle 4 is axially fixed in the shell, the baffle 4 divides the shell into the plate side heat exchange cavity and the tube side heat exchange cavity, the plate side heat exchange cavity is internally provided with the plurality of heat exchange plates 3 parallel to the end plates 2, the heat exchange plates 4 and the end plates 5 are respectively provided with four through holes, fluid collecting and distributing pipes 26 penetrate through the through holes, the heat exchange plates 3, the end plates 2, the cylinder 1 and the baffle 4 form the small cavities together, and fluid collecting and distributing holes 28 on the two fluid collecting and distributing pipes 26 leak in each small cavity, so that a phase-changeable gas condensing cavity and a cooling liquid cavity are formed alternately;
A plurality of heat exchange tubes 27 are fixedly arranged in the tube side heat exchange cavity and perpendicular to the end plates 2, openings are formed in the positions, close to the two end plates 2, of the cylinder 1, the low-temperature cooling liquid inflow tube 15 and the low-temperature cooling liquid outflow tube 16 are fixedly connected, two ends of the cylinder 1, corresponding to the tube side heat exchange cavity, are fixedly provided with half sealing heads 5, two ends of the plurality of heat exchange tubes 27 penetrate through the end plates 2 and are communicated with inner cavities of the half sealing heads 5, the half sealing heads on two sides are respectively connected with a condensate inflow tube 13 and a cooling condensate outflow tube 14, and the condensate inflow tube 13 is communicated with one fluid collecting and distributing inflow tube 26.
The four-flow plate-tube heat exchanger is specifically implemented according to the following steps that firstly, end plates 2 are welded at two ends of a cylinder 1 to form a heat exchanger shell, a baffle plate 4 is welded in the shell, the shell is divided into two cavities, namely a plate-pass heat exchange cavity and a tube-pass heat exchange cavity, at least three heat exchange plates 3 are arranged in one cavity in parallel with the end plates 2 to form the plate-pass heat exchange cavity, a plurality of heat exchange tubes 27 are arranged in the other cavity and perpendicular to the end plates 2, and two ends of each heat exchange tube 27 are welded and fixed with the end plates 2 at two ends of the cylinder 1 to form the tube-pass heat exchange cavity.
Next, referring to fig. 5 and 9, four holes having the same diameter are formed in each of the two end plates 2 and the heat exchange plates 3, namely, the air flow hole 22, the condensate outflow hole 23, the coolant inflow hole 24, and the coolant outflow hole 25, respectively, and the four holes in each of the heat exchange plates 3 are welded to four fluid collecting and distributing inlet/outlet pipes 26, respectively, and the heat exchange plates are welded to the inner wall of the cylinder 1 and the separator 4.
Further, as shown in fig. 8, the plate heat exchange cavity is a plurality of small cavities formed by a plurality of heat exchange plates 3, fluid collecting and distributing inlet and outlet pipes 26, a cylinder 1 and a partition plate 4, and only two fluid collecting and distributing holes 28 on the fluid collecting and distributing inlet and outlet pipes 26 can leak out from each small cavity, so that a phase-changeable gas condensation cavity 31 and a cooling liquid cavity 32 which are arranged alternately are formed.
Further, referring to fig. 6, the fluid collecting and distributing inlet and outlet pipe 26 is plugged at one end, fluid collecting and distributing holes 28 are uniformly formed at intervals along the length direction of the pipe, preferably the aperture and the interval distance are equal, and the fluid collecting and distributing inlet and outlet pipe can be round holes or polygonal holes, preferably square holes, and the interval between adjacent holes is at least larger than the thickness of the heat exchange plate 3. The pore diameter and the pore distance are determined by heat exchange balance calculation.
Further, referring to fig. 2 and 9, the tube side heat exchange chamber is formed by forming two holes on the side of the cylindrical surface 1 close to the two end plates 2, welding the low temperature cooling liquid inflow tube 15 and the low temperature cooling liquid outflow tube 16, and arranging a plurality of upper guide plates 8 and lower guide plates 7 on a plurality of heat exchange tubes 27.
Further, referring to fig. 1,2 and 7, the two half heads 5 are respectively fixed by inner flanges 18 welded at both ends of the cylinder 1 and by outer flanges 19, bolts 20 and nuts 21, at positions outside the end plates 2 corresponding to the tube side heat exchange chambers. As shown in fig. 7, the semi-seal head 5 is a semi-circular arc-shaped body with an inner cavity, and comprises a circular arc-shaped part 51 and a flat plate part 52, and is installed in a manner that the outer surface 29 of the semi-seal head flange is close to the outer flange 19, the inner surface 30 of the semi-seal head flange is close to the inner flange 18, a condensate inlet and outlet 33 is formed in the circular arc-shaped part 51, and the condensate inlet and outlet 33 is respectively communicated with the condensate inflow pipe 13 and the cooling condensate outflow pipe 14. A half seal head gasket 6 is arranged between the half seal head 5 and the end plate 2. The condensate inflow pipe 13 and the cooling condensate outflow pipe 14 are welded on the outer sides of the two half seal heads 5.
Still further, a connecting pipe 17 is welded between the condensate outflow pipe 10 and the condensate inflow pipe 13.
The four pipes serving as the gas inflow pipe 9, the condensate outflow pipe 10, the coolant inflow pipe 11, and the coolant outflow pipe 12 are all made of the fluid collecting and distributing inflow pipe 26, and are used in pairs, wherein each pair of pipes is just offset from the fluid collecting and distributing holes 28 of the other pair of pipes.
The four-flow plate-tube heat exchanger disclosed by the invention has the use process that after the phase-changeable gas enters the plate-tube heat exchange cavity from the gas inflow tube 9, the cooling liquid cavity 32 and the phase-changeable gas condensation cavity 31 are arranged alternately, the phase-changeable gas enters the plate-tube heat exchange cavity and is condensed, the condensed liquid enters the tube-tube heat exchanger through the condensate outflow tube 10, the connecting tube 17 and the condensate inflow tube 13 for heat exchange, and finally flows out of the cooling condensate outflow tube 14, so that the heat exchange condensation and cooling of the phase-changeable fluid by adopting circulating cooling liquid and low-temperature cooling liquid in the same heat exchanger are realized, the space is saved, the heat exchange efficiency is improved, and the temperature of the condensed liquid flowing out can be precisely controlled through the exchange area of the control plate and the tube pass and the temperature and flow of the two cooling liquids.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The four-flow-path plate-tube heat exchanger is characterized by comprising a cylinder (1), wherein end plates (2) are fixed at two ends of the cylinder (1) to form a heat exchanger shell, a baffle plate (4) is fixed in the shell along the axial direction of the shell, and the baffle plate (4) divides the shell into a plate-path heat exchange cavity and a tube-path heat exchange cavity;
four through holes are formed in the heat exchange plate (3) and the end plate (2), fluid collecting and distributing inlet and outlet pipes (26) are fixedly penetrated through the through holes, the heat exchange plate (3), the end plate (2), the cylinder (1) and the partition plate (4) form a plurality of small cavities together, and two fluid collecting and distributing holes (28) on the fluid collecting and distributing inlet and outlet pipes (26) leak out in each small cavity, so that a phase-changeable gas condensation cavity (31) and a cooling liquid cavity (32) which are mutually spaced are formed;
A plurality of heat exchange pipes (27) are vertically and fixedly arranged in the tube side heat exchange cavity and the end plates (2), holes are formed in the positions, close to the two end plates (2), of the cylinder (1) and are fixedly connected with a low-temperature cooling liquid inflow pipe (15) and a low-temperature cooling liquid outflow pipe (16), half seal heads (5) are fixedly arranged at the two ends, corresponding to the tube side heat exchange cavity, of the cylinder (1), the two ends of the plurality of heat exchange pipes (27) penetrate through the end plates (2) and are communicated with the inner cavities of the half seal heads (5), condensate inflow pipes (13) and cooling condensate outflow pipes (14) are respectively connected to the half seal heads (5) at the two sides, and the condensate inflow pipe (13) is communicated with one fluid collecting and distributing inflow pipe (26);
The four through holes formed in the heat exchange plate (3) and the end plate (2) are respectively an airflow hole (22), a condensate outflow hole (23), a coolant inflow hole (24) and a coolant outflow hole (25), wherein the airflow hole (22), the condensate outflow hole (23), the coolant inflow hole (24) and the coolant outflow hole (25) are respectively a gas inflow pipe (9), a condensate outflow pipe (10), a coolant inflow pipe (11) and a coolant outflow pipe (12) corresponding to the through fluid collecting and distributing inlet pipes (26), and the condensate outflow pipe (10) is communicated with the condensate inflow pipe (13) through a connecting pipe (17);
After the phase-changeable gas enters the plate-process heat exchange cavity from the gas inflow pipe (9), the cooling liquid cavity (32) and the phase-changeable gas condensation cavity (31) are arranged alternately, the phase-changeable gas is condensed after entering the plate-process heat exchange cavity, and condensed liquid enters the tube-process heat exchanger for heat exchange through the condensate outflow pipe (10), the connecting pipe (17) and the condensate inflow pipe (13) and finally flows out from the cooling condensate outflow pipe (14).
2. A four-pass plate and tube heat exchanger according to claim 1 wherein the fluid collection and distribution holes (28) have an equal aperture and spacing distance.
3. A four-pass plate and tube heat exchanger according to claim 2, wherein the spacing between adjacent fluid distribution holes (28) is at least greater than the thickness of the heat exchanger plate (3).
4. A four-flow plate and tube heat exchanger according to claim 1, wherein the heat exchange tube (27) is provided with an upper baffle (8) and a lower baffle (7) perpendicular to the heat exchange tube (27), and the lowest end of the upper baffle (8) is lower than the highest end of the lower baffle (7).
5. The four-flow plate and tube heat exchanger according to claim 1, wherein the half seal head (5) is fixed at two ends of the cylinder (1) through an inner flange (18), an outer flange (19), bolts (20) and nuts (21), the fixing positions of the half seal head are located at the outer sides of the end plates (2) corresponding to the tube side heat exchange cavities, and half seal head gaskets (6) are arranged between the half seal head (5) and the end plates (2).
6. The four-flow plate and tube heat exchanger according to claim 1, wherein the semi-seal head (5) is a semi-circular arc body with an inner cavity and comprises a circular arc portion (51) and a flat plate portion (52), and condensate inlets and outlets (33) are formed in the circular arc portion (51).
7. The four-flow plate and tube heat exchanger according to claim 1, wherein the partition plate (4) is welded and fixed with the cylinder (1), and both ends of the connecting tube (17) are welded and fixed with the condensate outflow tube (10) and the condensate inflow tube (13) respectively.
8. The four-flow plate and tube heat exchanger according to claim 1, wherein a plurality of heat exchange tube holes (34) are formed in the end plate (2) at positions corresponding to the heat exchange tubes (27), and the fluid collecting and distributing holes (28) are square holes or round holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078413.1A CN112728966B (en) | 2021-01-21 | 2021-01-21 | A four-pass plate-tube heat exchanger and a method of using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078413.1A CN112728966B (en) | 2021-01-21 | 2021-01-21 | A four-pass plate-tube heat exchanger and a method of using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112728966A CN112728966A (en) | 2021-04-30 |
| CN112728966B true CN112728966B (en) | 2024-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110078413.1A Active CN112728966B (en) | 2021-01-21 | 2021-01-21 | A four-pass plate-tube heat exchanger and a method of using the same |
Country Status (1)
| Country | Link |
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| CN117249705B (en) * | 2023-10-17 | 2024-05-28 | 杭州中泰深冷技术股份有限公司 | High-stability plate-fin heat exchanger for LNG ship |
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