CN111504097A - External connection straight-through type phase change heat exchange device - Google Patents
External connection straight-through type phase change heat exchange device Download PDFInfo
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- CN111504097A CN111504097A CN202010346406.0A CN202010346406A CN111504097A CN 111504097 A CN111504097 A CN 111504097A CN 202010346406 A CN202010346406 A CN 202010346406A CN 111504097 A CN111504097 A CN 111504097A
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- 230000008859 change Effects 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 147
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000001704 evaporation Methods 0.000 claims abstract description 32
- 230000008020 evaporation Effects 0.000 claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims description 91
- 239000000178 monomer Substances 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 15
- 238000009826 distribution Methods 0.000 abstract description 9
- 238000007701 flash-distillation Methods 0.000 description 25
- 238000013461 design Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
Abstract
An external connection straight-through type phase change heat exchange device belongs to the technical field of energy. The invention solves the problems that the existing phase change heat exchange device is too large in size and inconvenient to transport, assemble and disassemble, and the liquid inlet mode and the water distribution mode of the existing flash evaporator are easy to block. The heat exchange tube bundle is arranged on the upper portion of the cavity structure, a flash chamber is formed in the lower portion of the cavity structure, the spray tube is communicated with the upper side wall of the flash chamber, liquid to be flashed enters the flash chamber through the spray tube for flash evaporation, steam obtained after flash evaporation moves upwards to the upper portion of the cavity structure and exchanges heat with the liquid to be heated in the heat exchange tube bundle, and the temperature of the liquid to be heated in the heat exchange tube bundle rises.
Description
Technical Field
The invention relates to an externally-connected straight-through type phase-change heat exchange device, and belongs to the technical field of energy environmental protection.
Background
The phase change heat exchange devices of the prior art generally comprise: flash vessel, condenser, vacuum system, control system and some connecting lines. The principle of the phase change heat exchange device is that the flash evaporation steam generated by utilizing the flash evaporation principle of low-temperature waste hot water under the vacuum condition enters a condenser to heat the heating circulating water, and then the heating circulating water heats the surrounding buildings. The basic function is to flash the low-temperature water, and the utilization of the heat of the flash steam is suitable for heating; in addition, the effect of reducing the industrial wastewater can be achieved by utilizing the concentration effect of flash evaporation on the industrial wastewater.
Phase change heat transfer device among the prior art, flash vessel all are independent equipment with the condenser, and flash vessel and condenser are for controlling mostly, and the middle pipy steam channel intercommunication that passes through leads to phase change heat transfer device area and volume all too big, and the transportation loading and unloading of being not convenient for, and limited because of the inside place of most mills or enterprises, leads to its popularization and application to receive the influence. Meanwhile, the flash evaporator adopts a mode of feeding liquid from the upper part, and the inside of the flash evaporator adopts a water distribution plate or a spraying mode to distribute water, so that the problem of blockage is easily caused, and the cleaning and maintenance period is shortened.
Disclosure of Invention
The invention provides an external connection straight-through type phase-change heat exchange device, aiming at solving the problems that the existing phase-change heat exchange device is too large in size and inconvenient to transport, assemble and disassemble and the problems that the liquid inlet mode and the water distribution mode of the existing flash evaporator are easy to block.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an external connection through type phase change heat exchange device comprises N external connection through type phase change heat exchange monomers, wherein N is more than or equal to 1, each externally-connected straight-through phase change heat exchange monomer comprises a shell and a spray pipe, the shell is arranged in a sealing manner and has a hollow cavity structure, the shell is communicated with a vacuum pump, through the vacuum pump with the inside evacuation of casing, and the heat exchanger tube bank has been arranged on the upper portion of cavity structure, the effect that vacuum pump and heat exchanger tube bank are passed through to the lower part of cavity structure forms the flash distillation chamber, and the spray tube is arranged with the upper portion lateral wall intercommunication of flash distillation chamber, treats that flash distillation liquid passes through the spray tube gets into and carries out the flash distillation in the flash distillation chamber, and the steam upward movement that obtains after the flash distillation is to the upper portion of cavity structure and with the heat exchanger tube bank in treat that the liquid heat transfer is carried out, makes treating in the heat exchanger tube bank that the liquid temperature of heating rises, offers on the casing and remains the flash distillation liquid export.
Furthermore, the outlet of the liquid to be flashed is arranged on the side wall of the lower part of the flash chamber, and the end of the spray pipe, which is positioned outside the flash chamber, is an inlet of the liquid to be flashed.
Further, when N is larger than or equal to 2, the N externally-connected straight-through type phase-change heat exchange monomers are sequentially communicated and arranged from the first effect to the Nth effect from top to bottom, liquid to be flashed after the flashing of the first effect enters the next effect for flashing through a liquid outlet to be flashed in the previous effect and a liquid inlet to be flashed in the next effect, and the liquid to be flashed after the flashing of the Nth effect flows into a liquid water outlet pipe to be flashed through a liquid outlet to be flashed in the Nth effect.
Further, the spray pipe is of a conical pipe structure or a straight pipe structure.
Further, the bottom surface of the flash chamber is obliquely arranged, and the low-level end of the flash chamber is close to and lower than the outlet of the liquid to be flashed in the effect.
Further, the middle parts of the cavity structures in the shell are horizontally provided with demisters.
Furthermore, a water collecting device is arranged between the heat exchange tube bundle and the demister to collect steam condensate water, and a steam channel is formed in the water collecting device.
Further, a support is fixedly arranged at the bottom of the casing positioned at the lowest part, and the support is used for realizing the fixed installation of the casing relative to the ground.
Furthermore, two confluence channels are arranged at the upper part of the shell, when N is equal to 1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply pipe of the liquid to be heated through the other confluence channel; when N is larger than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a conveying pipe of the liquid to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe of the liquid to be heated.
Furthermore, the heat exchange tube bundle in each effect comprises a plurality of heat exchange straight tubes which are parallel to each other, and the heat exchange straight tubes are horizontally paved on the upper part of the cavity structure.
Furthermore, each heat exchange tube bundle in the effect comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial and horizontally arranged from inside to outside.
Compared with the prior art, the invention has the following effects:
the single-effect or multi-effect flash evaporation device has the advantages that the single-effect or multi-effect flash evaporation function is realized, the externally-connected through type phase change heat exchange monomer can be used as the externally-connected through type phase change heat exchange device with the single effect, when the multi-effect flash evaporation is needed, each effect is of a monomer structure, and therefore the plurality of externally-connected through type phase change heat exchange monomers are overlapped and fixedly connected, and the installation is more convenient.
Heat transfer and flash distillation in the outer continuous straight-through type phase transition heat transfer monomer are all through arranging the realization from top to bottom in same cavity, the steam upward movement that obtains after the flash distillation, compare through solitary steam channel intercommunication with solitary condenser among the prior art and solitary flash vessel, the heat transfer effect is better, and effectively reduced phase transition heat transfer device's volume and area, the system cost is lower, and integrative structure effectively reduces the construction cycle, the more loading and unloading of being convenient for, manufacturing cost is greatly reduced also. The limited bearing degree of the inner site of a factory or an enterprise and the like is reduced.
Compared with a phase-change heat exchange device with the same heat exchange capacity in the prior art, the phase-change heat exchange device has the advantage that the heat exchange efficiency is improved by nearly two times.
Guarantee through the spray tube that treat that flash distillation liquid gets into the flash distillation chamber smoothly, adopt the spray thrower to spray and adopt the water distribution plate to carry out the mode of water distribution among the prior art and compare, effectively avoid the emergence of jam problem, and then effectively prolong and wash the maintenance cycle to through the spray tube under flash distillation negative pressure state, the water column can be the blasting form dispersion, can realize than prior art better water distribution and flash distillation effect.
And, this application realizes the side direction feed liquor through arranging the spray tube at flash chamber upper portion lateral wall, very big has made things convenient for the washing maintenance to the spray tube.
Drawings
Fig. 1 is a schematic main sectional view of a single-effect externally-connected straight-through phase-change heat exchange device when N is 1 (in the case that a heat exchange tube bundle includes a plurality of heat exchange straight tubes);
fig. 2 is a schematic side sectional view of a single-effect externally-connected straight-through phase-change heat exchanger with N ═ 1 (in the case where the heat exchange tube bundle includes several heat exchange straight tubes);
fig. 3 is a schematic top view of a single-effect externally-connected straight-through phase-change heat exchanger with N ═ 1 (in the case that the heat exchange tube bundle includes several heat exchange straight tubes);
fig. 4 is a main sectional view of the multi-effect externally-connected straight-through phase-change heat exchange device when N is 3 (in the case that the heat exchange tube bundle includes a plurality of heat exchange straight tubes);
fig. 5 is a schematic front view of the multi-effect externally-connected straight-through phase-change heat exchange device when N is 3 (in the case that the heat exchange tube bundle includes a plurality of heat exchange straight tubes).
Detailed Description
The first embodiment is as follows: the embodiment is described by combining fig. 1-5, an externally connected straight-through type phase change heat exchange device comprises N externally connected straight-through type phase change heat exchange monomers, wherein N is more than or equal to 1, each externally connected straight-through type phase change heat exchange monomer comprises a shell (1) and a spray pipe (4), the shell (1) is hermetically arranged and is internally provided with a cavity structure, the shell (1) is communicated with a vacuum pump (19), the inside of the shell (1) is vacuumized through the vacuum pump (19), the upper part of the cavity structure is provided with a heat exchange pipe bundle (3), the lower part of the cavity structure forms a flash evaporation chamber (2) through the action of the vacuum pump (19) and the heat exchange pipe bundle (3), the spray pipe (4) is communicated with the side wall of the upper part of the flash evaporation chamber (2), liquid to be flashed enters the flash evaporation chamber (2) through the spray pipe (4) for flash evaporation, steam obtained after flash evaporation moves upwards to the upper part of the cavity structure and exchanges heat, the temperature of the liquid to be heated in the heat exchange tube bundle (3) is raised, a liquid outlet (9) to be flashed is formed in the shell (1), and the liquid to be flashed after flashing flows out through the liquid outlet (9) to be flashed.
The method is implemented according to the following steps that N is equal to or greater than 1, the height of the flash evaporation device is higher, the manufacturing cost is higher, and N is preferably greater than or equal to 1 and less than or equal to 6.
The housing (1) is preferably a box-shaped structure consisting of six plates.
The liquid to be flashed is preferably a liquid to be flashed at a medium-high temperature of 30-95 ℃, and can also be a liquid to be flashed in any other temperature range. Before the liquid to be flashed enters each effect flash evaporation chamber (2), the interior of the shell (1) is vacuumized through a vacuum pump (19), then the liquid to be flashed enters the flash evaporation chamber (2) for flash evaporation, and because the pressure in the flash evaporation chamber is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed, the liquid to be flashed is flash evaporated immediately, the obtained vapor exchanges heat with the liquid to be heated in the heat exchange tube bundle in the first effect along a spatial pressure gradient, the vapor is condensed, and the liquid to be heated flows out after being heated and is supplied to a heat user or flows to a cooling tower or other purposes are realized.
Steam condensate generated in the heat exchange tube bundle (3) is discharged into a condensate water tank (18) through a condensate pipe (17) and a water pump, and non-condensable gas generated in the cavity structure is discharged through a vacuum pump (19).
The number of water pumps and the number of vacuum pumps are not limited in this application, for example: each effect can be independently provided with a water pump for discharging condensed water and a vacuum pump for vacuumizing and discharging non-condensable gas; the N effect can be used for simultaneously sharing one water pump for discharging condensed water, and simultaneously sharing one vacuum pump for vacuumizing and discharging non-condensable gas.
The vacuum pump (19) referred to in the present application may be any device that can achieve evacuation of the interior of the housing (1). Which is preferably arranged in communication in the upper part of the housing (1).
Spray tube (4) are one section nozzle stub through thermodynamic calculation, because of dissolving in the liquid of treating the flash distillation has easy crystalline substance or contains solid impurity, in order to guarantee to treat that the flash distillation liquid gets into the flash chamber smoothly, design spray tube (4) for tubular structure, compare with the mode that adopts the spray thrower to spray and adopt the water distribution plate to carry out the water distribution among the prior art, effectively avoid the emergence of jam problem, and then effectively prolong and wash the maintenance cycle, and under flash distillation negative pressure state through the spray tube, the water column can be the blasting form dispersion, can realize better water distribution and flash evaporation effect than prior art.
The nozzles are preferably arranged horizontally.
When N is more than or equal to 2, the residual liquid to be flashed after the first effect flash evaporation downwards enters the flash evaporation chamber in the second effect, the liquid is flashed again, the generated steam upwards exchanges heat with the heat exchange tube bundle in the second effect, the residual liquid to be flashed after the flash evaporation enters the flash evaporation chamber in the third effect and is flashed again, the generated steam upwards exchanges heat with the heat exchange tube bundle in the third effect, and the residual liquid to be flashed continuously flashes downwards until the last effect flash evaporation is finished. Discharging the residual liquid to be flashed through a liquid outlet to be flashed;
the liquid to be heated and the steam are subjected to countercurrent heat exchange, the liquid to be heated sequentially flows through the heat exchange tube bundles from the Nth effect to the first effect from bottom to top, the liquid to be heated exchanges heat with the steam through the heat exchange tube bundles, namely, the liquid to be heated enters the heat exchange tube bundles from the Nth effect liquid inlet pipe 14, enters the heat exchange tube bundles from the Nth effect through the liquid conveying pipe 15, after being heated, the liquid enters the heat exchange tube bundles from the Nth effect through the liquid conveying pipe 15, the process is circulated until the liquid to be heated enters the heat exchange tube bundles from the first effect, and after being heated, the liquid to be heated is output through the liquid supply pipe 13 and is supplied to a heat user or flows to a cooling tower.
The liquid to be heated in the heat exchange tube bundle is heated, and the steam outside the tube is condensed to release heat.
The upper side wall of the shell in each effect is provided with a water discharge port and an air discharge port, and the water discharge port and the air discharge port are condensed water and non-condensed air discharge channels on the steam side in the shell.
This application has multiple-effect flash distillation function, and the heat exchanger tube bank in each effect all is intercommunication about with flash chamber (2) and arranges, and the steam upward movement that obtains after the flash distillation has effectively reduced phase transition heat transfer device's volume, compares with prior art, and the transportation loading and unloading of being more convenient for has reduced the limited bearing degree such as mill or the inside place of enterprise.
The external connection through type phase change heat exchange monomer in the application can be used independently, and a plurality of external connection through type phase change heat exchange monomers can be mutually overlapped and communicated for use so as to realize the integration of the system. )
The spray pipe (4) is of a conical pipe structure or a straight pipe structure.
The liquid outlet (9) to be flashed is arranged on the side wall of the lower part of the flash chamber (2), and the end of the spray pipe (4) outside the flash chamber is an inlet for the liquid to be flashed.
When N is more than or equal to 2, the N externally-connected straight-through type phase-change heat exchange monomers are sequentially communicated from top to bottom and are arranged from the first effect to the Nth effect, the liquid to be flashed after the flashing of the previous effect enters the next effect for flashing through the liquid outlet (9) to be flashed in the previous effect and the liquid outlet (9) to be flashed in the next effect, and the liquid to be flashed after the flashing of the Nth effect flows into the liquid water outlet pipe (10) to be flashed through the liquid outlet (9) to be flashed in the Nth effect. (so design, treat that flash distillation liquid comes water pipe 16 and treats flash distillation liquid import and get into the flash chamber from the side through treating flash distillation liquid, flash steam gets into cavity structure upper portion, through heat exchange tube bank (3) heat transfer, heats the liquid of waiting to heat (the liquid export of waiting to flash distillation of Nth effect can arrange bottom or the lateral wall at the casing according to actual need.))
The bottom surface of the flash chamber (2) is obliquely arranged, and the lower end of the flash chamber is close to and lower than the outlet (9) of the liquid to be flashed in the effect. (so designed as to facilitate the flow of the liquid after flash evaporation out of the liquid outlet (9) to be flashed.)
A demister (5) is horizontally arranged in the middle of the cavity structure in the shell (1). (by such design, the upper part and the lower part of the cavity structure are communicated through the demister (5), the demister (5) is horizontally arranged, the demisting area is effectively increased, fine water drops, spray, other non-vapor substances and the like in flash steam can be filtered out through the demister (5). The structure of the demister (5) is the prior art, and is not described again here
A water collecting device (6) is arranged between the heat exchange tube bundle (3) and the demister (5) to collect steam condensate, and a steam channel (7) is formed in the water collecting device (6). (by such design, the water collecting device (6) can be any device capable of collecting condensed water in the prior flash evaporation technology, steam directly enters the upper part of the shell (1) through the steam channel (7) for heat exchange, the water collecting device (6) preferably comprises a water collecting disc (20) and a water collecting tank (8), the water collecting disc (20) is in a cone-shaped structure, a through hole is formed in the middle of the water collecting disc (20), a conical baffle (21) is fixedly arranged above the water collecting disc (20), the conical baffle (21) is positioned right above the through hole, a plurality of steam channels (7) are formed between the conical baffle (21) and the water collecting disc (20), the water collecting tank (8) is an annular through groove, the large end of the water collecting disc (20) is a low-level end and is positioned above the water collecting tank (8), liquid collected by the water collecting disc (20) flows to the water collecting tank (8), and the water collecting tank (8) is communicated with an external water pipe (17), condensed water collected by the water collecting tank (8) enters a condensed water tank (18) through a condensed water pipe (17). The annular structure of the water collecting tank (8) and the integral structure of the externally-connected straight-through type phase change heat exchange monomer are arranged along with the shape, namely if the cross section of the externally-connected straight-through type phase change heat exchange monomer is of a rectangular structure, the water collecting tank (8) is of a rectangular ring structure, and if the cross section of the externally-connected straight-through type phase change heat exchange monomer is of a circular structure, the water collecting tank (8) is of a circular ring structure. )
And a bracket (11) is fixedly arranged at the bottom of the lowest shell (1), and the bracket (11) is fixedly arranged relative to the ground. (so design, effectively avoid remaining wait to flash distillation liquid through waiting to flash distillation liquid export (9) and external drain pump when discharging, cavitation that probably takes place in the water pump, and then guarantee that remaining wait to flash distillation liquid discharges smoothly.)
Two confluence channels (12) are arranged at the upper part of the shell (1), when N is equal to 1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe (14) of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply pipe (13) of the liquid to be heated through the other confluence channel; when N is more than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe (14) of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a liquid conveying pipe (15) of the liquid to be heated, the other confluence channel in the first effect is communicated with a liquid supply pipe (13) of the liquid to be heated (by the design, the liquid to be heated sequentially passes through the liquid inlet pipe (14) of the liquid to be heated and the liquid conveying pipes (15) of the liquid to be heated and finally flows out through the liquid supply pipe (13) of the liquid to be heated.)
The second embodiment is as follows: as shown in figures 1-5, the heat exchange tube bundle (3) in each effect comprises a plurality of heat exchange straight tubes which are parallel to each other, and the heat exchange straight tubes are horizontally laid on the upper part of the cavity structure.
The third concrete implementation mode: as shown in figures 1-5, the heat exchange tube bundle (3) in each effect comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial and horizontally arranged from inside to outside. (each heat exchange elbow is of an annular structure.)
The fourth concrete implementation mode: as shown in FIGS. 1 to 5, when N is 3, the flash chambers are sequentially a first effect 101 to a third effect 103 from top to bottom.
The liquid to be flashed enters the inside of a flash chamber in the first effect 101 from the side direction for flash evaporation, due to the action of a vacuum pump, the pressure in the flash chamber is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed, the liquid to be flashed is flash evaporated immediately, the obtained vapor exchanges heat with the liquid to be heated in a heat exchange tube bundle in the first effect 101 along the spatial pressure gradient upwards, the vapor is condensed, and the liquid to be heated is heated;
the liquid outlet to be flashed communicated with the lower side wall of the last effect flash chamber is communicated with the spray pipe communicated with the upper side wall of the next effect flash chamber through a liquid conveying pipe 22 to be flashed, the residual liquid to be flashed after the flash evaporation of the first effect 101 flows out to the liquid outlet to be flashed of the first side wall of the flash chamber, enters the flash chamber in the second effect 102 through the liquid conveying pipe 22 to be flashed and the spray pipe, the generated steam is flashed again, the generated steam exchanges heat upwards with the heat exchange tube bundle in the second effect 102, the residual liquid to be flashed enters the flash chamber in the third effect 103 for re-flash evaporation, and the generated steam exchanges heat upwards with the heat exchange tube bundle in the third effect 103. The residual liquid to be flashed is discharged through a liquid outlet to be flashed on the side wall of the flash chamber of the third effect 103 and an externally connected drain pump.
The steam condensate generated in each effect is correspondingly discharged through a water pump, and the non-condensable gas in the steam is correspondingly discharged through a vacuum pump.
The liquid to be heated flows from bottom to top through the heat exchange tube bundle from the N-th effect 101 to the first effect in sequence, exchanges heat with steam through the heat exchange tube bundle, flows out from the upper part after being heated, and is supplied to a heat user or flows to a cooling tower or other purposes. The liquid feeding pipe (13) for the liquid to be heated is communicated with one confluence channel in one effect, the other confluence channel in the first effect 101 is communicated with one confluence channel in the second effect 102, the other confluence channel in the second effect 102 is communicated with one confluence channel in the third effect 103 through two conveying pipes (15) for the liquid to be heated, the liquid feeding pipe (14) for the liquid to be heated is communicated with the other confluence channel (12) in the third effect 103, the liquid to be heated sequentially passes through the liquid feeding pipe (14) for the liquid to be heated and the two conveying pipes (15) for the liquid to be heated, and finally flows out through the liquid feeding pipe (13) for the liquid to be heated to supply heat for a heat user. Other components and connection relations are the same as those of the first, second or third embodiment.
Claims (11)
1. An external connection straight-through type phase change heat exchange device is characterized in that: the phase-change heat exchanger comprises N externally-connected straight-through type phase-change heat exchange monomers, wherein N is larger than or equal to 1, each externally-connected straight-through type phase-change heat exchange monomer comprises a shell (1) and a spray pipe (4), the shell (1) is arranged in a sealed mode and is of a cavity structure, the shell (1) is provided with a vacuum pump (19) in a communicated mode, the interior of the shell (1) is vacuumized through the vacuum pump (19), a heat exchange pipe bundle (3) is arranged on the upper portion of the cavity structure, the lower portion of the cavity structure forms a flash evaporation chamber (2) through the vacuum pump (19) and the heat exchange pipe bundle (3), the spray pipes (4) are arranged in a communicated mode with the side wall of the upper portion of the flash evaporation chamber (2), liquid to be flashed enters the flash evaporation chamber (2) through the spray pipes (4) to be flashed, steam obtained after flashing upwards moves to the upper portion of the cavity structure and exchanges heat, the shell (1) is provided with a liquid outlet (9) to be flashed, and the liquid to be flashed after flashing flows out through the liquid outlet (9) to be flashed.
2. An externally connected through-type phase-change heat transfer device according to claim 1, wherein: the liquid outlet (9) to be flashed is arranged on the side wall of the lower part of the flash chamber (2), and the end of the spray pipe (4) outside the flash chamber is an inlet for the liquid to be flashed.
3. An externally connected through-type phase-change heat transfer device according to claim 2, wherein: when N is more than or equal to 2, the N externally-connected straight-through type phase-change heat exchange monomers are sequentially communicated from top to bottom and are arranged from the first effect to the Nth effect, the liquid to be flashed after the flashing of the previous effect enters the next effect for flashing through the liquid outlet (9) to be flashed in the previous effect and the liquid outlet (9) to be flashed in the next effect, and the liquid to be flashed after the flashing of the Nth effect flows into the liquid water outlet pipe (10) to be flashed through the liquid outlet (9) to be flashed in the Nth effect.
4. An externally connected through-type phase-change heat exchanger according to claim 1, 2 or 3, wherein: the spray pipe (4) is of a conical pipe structure or a straight pipe structure.
5. An externally connected through-type phase-change heat transfer device according to claim 4, wherein: the bottom surface of the flash chamber (2) is obliquely arranged, and the lower end of the flash chamber is close to and lower than the outlet (9) of the liquid to be flashed in the effect.
6. An externally connected through-type phase-change heat exchange device according to claim 1, 2, 3 or 5, wherein: a demister (5) is horizontally arranged in the middle of the cavity structure in the shell (1).
7. An externally connected through-type phase-change heat transfer device according to claim 6, wherein: a water collecting device (6) is arranged between the heat exchange tube bundle (3) and the demister (5) to collect steam condensate, and a steam channel (7) is formed in the water collecting device (6).
8. An external connection through type phase change heat exchange device according to claim 1, 2, 3, 5 or 7, wherein: and a bracket (11) is fixedly arranged at the bottom of the lowest shell (1), and the bracket (11) is fixedly arranged relative to the ground.
9. An external connection through type phase change heat exchange device according to claim 1, 2, 3, 5 or 7, wherein: two confluence channels (12) are arranged at the upper part of the shell (1), when N is equal to 1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe (14) of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply pipe (13) of the liquid to be heated through the other confluence channel; when N is more than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe (14) of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a conveying pipe (15) of the liquid to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe (13) of the liquid to be heated.
10. An externally connected through-type phase-change heat transfer device according to claim 9, wherein: the heat exchange tube bundle (3) in each effect comprises a plurality of heat exchange straight tubes which are parallel to each other, and the heat exchange straight tubes are horizontally paved on the upper part of the cavity structure.
11. An externally connected through-type phase-change heat transfer device according to claim 9, wherein: the heat exchange tube bundle (3) in each effect comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial and horizontally arranged from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346406.0A CN111504097B (en) | 2020-04-27 | 2020-04-27 | Externally-connected straight-through phase change heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010346406.0A CN111504097B (en) | 2020-04-27 | 2020-04-27 | Externally-connected straight-through phase change heat exchange device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4312710A (en) * | 1979-01-26 | 1982-01-26 | Mitsubishi Jukogyo Kabushiki Kaisha | Multistage flash evaporator |
| CN101830529A (en) * | 2010-04-18 | 2010-09-15 | 胜利油田胜利勘察设计研究院有限公司 | Method for preparing clean water by using oil field sewage and for utilizing waste heat |
| CN106745428A (en) * | 2017-01-11 | 2017-05-31 | 江苏科技大学 | A kind of heat collection type solar multistage flash evaporation seawater desalting device and method |
| CN109821340A (en) * | 2019-02-21 | 2019-05-31 | 中国华电科工集团有限公司 | A kind of double regenerated smoke processing systems |
| CN110627289A (en) * | 2019-10-28 | 2019-12-31 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN110746025A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Low-temperature negative-pressure wastewater zero discharge system |
| CN110746024A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Concentrated waste heat retrieval and utilization device of low temperature economizer waste water |
| CN210030096U (en) * | 2019-03-13 | 2020-02-07 | 北京华源泰盟节能设备有限公司 | High-temperature sewage heat exchange system |
| CN212227822U (en) * | 2020-04-27 | 2020-12-25 | 哈尔滨工大金涛科技股份有限公司 | External connection straight-through type phase change heat exchange device |
-
2020
- 2020-04-27 CN CN202010346406.0A patent/CN111504097B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4312710A (en) * | 1979-01-26 | 1982-01-26 | Mitsubishi Jukogyo Kabushiki Kaisha | Multistage flash evaporator |
| CN101830529A (en) * | 2010-04-18 | 2010-09-15 | 胜利油田胜利勘察设计研究院有限公司 | Method for preparing clean water by using oil field sewage and for utilizing waste heat |
| CN106745428A (en) * | 2017-01-11 | 2017-05-31 | 江苏科技大学 | A kind of heat collection type solar multistage flash evaporation seawater desalting device and method |
| CN109821340A (en) * | 2019-02-21 | 2019-05-31 | 中国华电科工集团有限公司 | A kind of double regenerated smoke processing systems |
| CN210030096U (en) * | 2019-03-13 | 2020-02-07 | 北京华源泰盟节能设备有限公司 | High-temperature sewage heat exchange system |
| CN110627289A (en) * | 2019-10-28 | 2019-12-31 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN110746025A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Low-temperature negative-pressure wastewater zero discharge system |
| CN110746024A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Concentrated waste heat retrieval and utilization device of low temperature economizer waste water |
| CN212227822U (en) * | 2020-04-27 | 2020-12-25 | 哈尔滨工大金涛科技股份有限公司 | External connection straight-through type phase change heat exchange device |
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