CN111504097B - Externally-connected straight-through phase change heat exchange device - Google Patents
Externally-connected straight-through phase change heat exchange device Download PDFInfo
- Publication number
- CN111504097B CN111504097B CN202010346406.0A CN202010346406A CN111504097B CN 111504097 B CN111504097 B CN 111504097B CN 202010346406 A CN202010346406 A CN 202010346406A CN 111504097 B CN111504097 B CN 111504097B
- Authority
- CN
- China
- Prior art keywords
- liquid
- heat exchange
- flashed
- effect
- phase change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 claims abstract description 140
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000001704 evaporation Methods 0.000 claims abstract description 41
- 230000008020 evaporation Effects 0.000 claims abstract description 41
- 239000007921 spray Substances 0.000 claims abstract description 28
- 239000000178 monomer Substances 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims description 87
- 238000012546 transfer Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 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
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
An externally connected through type phase change heat exchanger belongs to the technical field of energy. The application solves the problems that the existing phase change heat device is overlarge in volume and inconvenient to transport, load and unload, and the liquid inlet mode and the water distribution mode of the existing flash evaporator are extremely easy to be blocked. The device comprises N external through type phase change heat exchange monomers, wherein N is more than or equal to 1, each external through type phase change heat exchange monomer comprises a shell and a spray pipe, the shell is hermetically arranged and internally provided with a cavity structure, a vacuum pump is arranged in the shell in a communicating way, the inside of the shell is vacuumized through the vacuum pump, a heat exchange tube bundle is arranged on the upper part of the cavity structure, a flash chamber is formed on the lower part of the cavity structure, the spray pipe is communicated with the upper side wall of the flash chamber, flash evaporation liquid to be flashed is introduced into the flash chamber through the spray pipe, steam obtained after flash evaporation moves upwards to the upper part of the cavity structure and exchanges heat with 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 is increased.
Description
Technical Field
The application relates to an externally-connected straight-through type phase change heat device, and belongs to the technical field of energy environment protection.
Background
The prior art phase change thermic devices generally comprise: flash evaporator, condenser, vacuum system, control system and some connecting lines. The principle of the phase change heat exchanger is that the flash evaporation principle of low-temperature waste hot water is utilized under the vacuum condition, the generated flash evaporation steam enters a condenser to heat heating circulating water, and then the heating circulating water heats surrounding buildings. The basic function is to flash-evaporate low-temperature water, and the utilization of the heat of flash steam is suitable for heating; in addition, the industrial wastewater can be reduced by utilizing the concentration effect of flash evaporation on the industrial wastewater.
The phase change heat transfer device in the prior art, the flash evaporator and the condenser are all independent devices, and the flash evaporator and the condenser are mostly arranged left and right, and the middle is communicated through a tubular steam channel, so that the occupied area and the volume of the phase change heat transfer device are overlarge, the transportation, the loading and the unloading are inconvenient, and the popularization and the application are influenced because the internal sites of most factories or enterprises are limited. Meanwhile, the flash evaporator adopts the upper liquid inlet mode, 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 very easy to occur, and the cleaning and maintenance period is shortened.
Disclosure of Invention
The application aims to solve the problems that the existing phase change heat device is overlarge in volume and inconvenient to transport, load and unload and the problems that the liquid inlet mode and the water distribution mode of the existing flash evaporator are extremely easy to be blocked, and further provides an external connection straight-through type phase change heat device.
The technical scheme adopted by the application for solving the technical problems is as follows:
the utility model provides an external straight-through phase change heat transfer device, it includes N external straight-through phase change heat transfer monomer, and wherein N is greater than or equal to 1, and every external straight-through phase change heat transfer monomer all includes casing and spray tube, the sealed setting of casing and its interior cavity structure that is, casing intercommunication are provided with the vacuum pump, through the vacuum pump with the inside evacuation of casing, and the heat transfer tube bank has been arranged on the upper portion of cavity structure, the flash chamber is formed through the effect of vacuum pump and heat transfer tube bank in the lower part of cavity structure, the spray tube is arranged with the upper portion lateral wall intercommunication of flash chamber, waits to flash liquid and passes through the spray tube gets into the flash chamber and flash evaporation, and the steam that obtains after the flash evaporation upwards moves to the upper portion of cavity structure and carries out the heat transfer with the liquid that waits to heat in the heat transfer tube bank, makes the temperature of the liquid that wait in the heat transfer tube bank rise, has seted up the liquid export that waits to flash evaporation on the casing, and the liquid that waits to flash evaporation after the flash evaporation flows out through waiting to flash evaporation liquid export.
Further, the liquid outlet to be flashed is formed in the side wall of the lower part of the flash chamber, and one end of the spray pipe, which is positioned outside the flash chamber, is a liquid inlet to be flashed.
Further, when N is more than or equal to 2, the N externally-connected straight-through phase change heat exchange monomers are sequentially communicated from top to bottom to form a first effect to an nth effect, the liquid to be flashed after the last effect is flashed in the next effect through a liquid outlet to be flashed in the last effect and a liquid inlet to be flashed in the next effect, and the liquid to be flashed after the nth effect is flashed flows into the liquid water withdrawal 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 arranged obliquely, and the lower end of the flash chamber is arranged close to and lower than the liquid outlet to be flashed in the effect.
Further, demisters are horizontally arranged in the middle of the cavity structure in the shell.
Further, a water collecting device is arranged between the heat exchange tube bundle and the demister to collect steam condensate, and a steam channel is formed in the water collecting device.
Further, a bracket is fixedly arranged at the bottom of the shell at the lowest part, and the fixed installation of the shell relative to the ground is realized through the bracket.
Further, two converging channels are arranged at the upper part of the shell, when N=1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe of the liquid to be heated through one converging channel, and the other end of the heat exchange tube bundle is communicated with the liquid inlet pipe of the liquid to be heated through the other converging channel; when N is more than or equal to 2, one confluence channel in the N effect is communicated with the 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 the liquid conveying pipe to be heated, and the other confluence channel in the first effect is communicated with the liquid supply pipe of the liquid to be heated.
Further, the heat exchange tube bundles in each effect comprise 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.
Further, the heat exchange tube bundles in each effect comprise at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are coaxially and horizontally arranged in sequence from inside to outside.
Compared with the prior art, the application has the following effects:
the single-effect or multi-effect flash evaporation function is achieved, the externally-connected straight-through type phase change heat exchange monomer can be used as a single-effect externally-connected straight-through type phase change heat exchange device, and when multi-effect flash evaporation is needed to be achieved, a plurality of externally-connected straight-through type phase change heat exchange monomers are overlapped and fixedly connected due to the fact that each effect is of a monomer structure, and the externally-connected straight-through type phase change heat exchange monomer is convenient to install.
The heat exchange and flash evaporation in the externally connected straight-through phase change heat exchange monomer are realized by arranging the same cavity up and down, the steam obtained after flash evaporation moves upwards, compared with the independent condenser and the independent flash evaporator in the prior art which are communicated through independent steam channels, the heat exchange effect is better, the volume and the occupied area of the phase change heat exchange device are effectively reduced, the system cost is lower, the construction period is effectively reduced, the transportation, the loading and unloading are more convenient, and the manufacturing cost is also greatly reduced. The limited bearing degree of the sites and the like in factories or enterprises is reduced.
Compared with the phase change heat exchange device with the same heat exchange capacity in the prior art, the heat exchange efficiency is improved by nearly two times.
The liquid to be flashed smoothly enters the flash chamber through the spray pipe, and compared with the mode of spraying by adopting a sprayer and water distribution by adopting a water distribution plate in the prior art, the flash chamber has the advantages that the blocking problem is effectively avoided, the cleaning maintenance period is further effectively prolonged, in addition, the water column can be dispersed in a blasting manner through the spray pipe under the flash evaporation negative pressure state, and better water distribution and flash evaporation effects than those in the prior art can be realized.
In addition, the spray pipe is arranged on the side wall of the upper part of the flash chamber, so that lateral liquid feeding is realized, and cleaning and maintenance of the spray pipe are greatly facilitated.
Drawings
Fig. 1 is a schematic diagram of a main section of a single-effect externally connected straight-through phase change heat exchanger with n=1 (in the case of a heat exchange tube bundle comprising several heat exchange straight tubes);
fig. 2 is a schematic side cross-sectional view of a single-effect externally connected straight-through phase change heat transfer device with n=1 (in the case of a heat exchange tube bundle comprising 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 of a heat exchange tube bundle comprising several heat exchange straight tubes);
fig. 4 is a schematic diagram of a main section of a multi-effect externally connected straight-through phase change heat exchanger with n=3 (in case the heat exchange tube bundle comprises several heat exchange straight tubes);
fig. 5 is a schematic front view of a multi-effect externally connected straight-through phase change heat exchanger with n=3 (in the case of a heat exchange tube bundle comprising several heat exchange straight tubes).
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 5, the embodiment is described as an external through phase change heat exchange device, which includes N external through phase change heat exchange monomers, where N is greater than or equal to 1, each external through phase change heat exchange monomer includes a housing 1 and a spray pipe 4, the housing 1 is sealed and is in a cavity structure, a vacuum pump 19 is disposed in the housing 1 in a communicating manner, the interior of the housing 1 is vacuumized by the vacuum pump 19, a heat exchange tube bundle 3 is disposed at the upper portion of the cavity structure, a flash chamber 2 is formed by the vacuum pump 19 and the heat exchange tube bundle 3 at the lower portion of the cavity structure, the spray pipe 4 is disposed in communication with an upper side wall of the flash chamber 2, liquid to be flashed enters the flash chamber 2 through the spray pipe 4 for flash evaporation, and vapor obtained after flash evaporation moves upward to the upper portion of the cavity structure and exchanges heat with the liquid to be heated in the heat exchange tube bundle 3, so that the temperature of the liquid to be heated in the heat exchange tube bundle 3 rises, a liquid to be flashed outlet 9 is disposed on the housing 1, and the liquid to be flashed flows out through the liquid to be flashed outlet 9.
N=1 is a single-effect externally connected through-type phase change heat exchange device, and N is more than or equal to 2 is a multi-effect externally connected through-type phase change heat exchange device. The higher the value of N, the higher the flash evaporation device height, and the higher the cost, preferably N is 1 or less and 6 or less.
The housing 1 is preferably a box-type structure made up of six plates.
The liquid to be flashed is preferably a medium-high Wen Dai flash liquid with the temperature of 30-95 ℃, and can also be other liquid to be flashed in any temperature range. Before the liquid to be flashed enters each effect flash chamber 2, the interior of the shell 1 is vacuumized through the vacuum pump 19, then the liquid to be flashed enters the flash chambers 2 for flash evaporation, the liquid to be flashed is flashed and evaporated immediately because the pressure in the flash chambers is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed, and the obtained vapor is condensed after heat exchange with the liquid to be heated in the heat exchange tube bundles in the first effect upwards along the spatial pressure gradient, and the liquid to be heated flows out to be supplied to a heat user or flows to a cooling tower or realizes other purposes after being heated.
The steam condensate generated in the heat exchange tube bundle 3 is discharged into a condensate water tank 18 through a condensate water pipe 17 and a water pump, and noncondensable gases generated in the cavity structure are all discharged through a vacuum pump 19.
The number of water pumps and the number of vacuum pumps are not limited in the present 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 noncondensable gas; the device can also share a water pump for discharging condensed water and a vacuum pump for vacuumizing and discharging noncondensable gas at the same time.
The vacuum pump 19 involved 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.
The spray pipe 4 is a short pipe section subjected to thermal calculation, and because the liquid to be flashed is dissolved with easily crystallized substances or contains solid impurities, in order to ensure that the liquid to be flashed smoothly enters the flash chamber, the spray pipe 4 is designed into a tubular structure, compared with the mode of spraying by a sprayer and water distribution by a water distribution plate in the prior art, the spray pipe effectively avoids the occurrence of blocking problems, further effectively prolongs the cleaning and maintenance period, and water columns are dispersed in a blasting manner under the flash evaporation negative pressure state through the spray pipe, so that better water distribution and flash evaporation effects than the prior art can be realized.
The nozzle is preferably arranged horizontally.
When N is more than or equal to 2, the residual liquid to be flashed after the flash evaporation of the first effect is downward and enters a flash evaporation chamber in the second effect for flash evaporation again, the generated steam is heat exchanged with a heat exchange tube bundle in the second effect, the residual liquid to be flashed enters a flash evaporation chamber in the third effect for flash evaporation again, the generated steam is heat exchanged with the heat exchange tube bundle in the third effect upward, and the residual liquid to be flashed continues to be flashed downward until the flash evaporation of the last effect is finished. The rest liquid to be flashed is discharged 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 N 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 in the N effect from the liquid inlet tube 14 of the N effect, after being heated and warmed, enters the heat exchange tube bundles in the N-1 effect through the liquid conveying tube 15 to be heated, after being heated, enters the heat exchange tube bundles in the N-2 effect through the liquid conveying tube 15 to be heated, the process is circulated until the liquid to be heated enters the heat exchange tube bundles in the first effect, and after being heated and warmed, the liquid to be heated is output through the liquid supply tube 13 to be heated and 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 condenses to release heat.
The upper side wall of the shell is provided with a water discharge port and a gas discharge port, which are condensed water and noncondensable gas discharge channels on the steam side in the shell.
The application has multiple-effect flash evaporation function, the heat exchange tube bundle and the flash evaporation chamber 2 in each effect are vertically communicated, the steam obtained after flash evaporation moves upwards, the volume of the phase-change heat exchange device is effectively reduced, and compared with the prior art, the application is more convenient for transportation, loading and unloading, and reduces the limited bearing degree of the sites and the like in factories or enterprises.
The externally-connected through-type phase change heat exchange monomer can be used independently, and a plurality of externally-connected through-type phase change heat exchange monomers can be mutually overlapped and communicated for use, so that the integration of a system is realized.
The spray pipe 4 is in 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 one end of the spray pipe 4 positioned outside the flash chamber is a liquid inlet to be flashed.
When N is more than or equal to 2, N externally connected straight-through phase change heat exchange monomers are sequentially communicated from top to bottom to form a first effect to an nth effect, the liquid to be flashed after the last effect is flashed in the next effect through a liquid outlet 9 to be flashed in the last effect and a liquid inlet to be flashed in the next effect, and the liquid to be flashed after the nth effect is flashed flows into a liquid water withdrawal pipe 10 to be flashed through the liquid outlet 9 to be flashed in the nth effect. So designed, the liquid to be flashed enters the flash chamber from the side through the liquid water inlet pipe 16 to be flashed and the liquid inlet to be flashed, and the flash steam enters the upper part of the cavity structure and exchanges heat through the heat exchange tube bundle 3 to heat the liquid to be heated. The nth liquid outlet to be flashed can be arranged at the bottom end or the side wall of the shell according to actual needs.
The bottom surface of the flash chamber 2 is arranged obliquely, and the lower end thereof is arranged close to and below the liquid outlet 9 to be flashed in this effect. So designed, the flashed liquid is facilitated to flow 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. Through defroster 5 intercommunication between cavity structure's upper portion and the lower part, defroster 5 level is arranged, effectively increases the defogging area. Fine water droplets, other non-vaporous substances, etc. in the flash steam can be filtered out by the demister 5. The demister 5 is of a structure of the prior art and will not be described here in detail.
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 arranged on the water collecting device 6. So designed, the water receiving device 6 can be any device capable of collecting condensed water in the prior flash evaporation technology. The 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, wherein the water collecting disc 20 is of a cone-shaped structure, a through hole is formed in the middle of the water collecting disc 20, a cone-shaped baffle 21 is fixedly arranged above the water collecting disc 20, the cone-shaped baffle 21 is located right above the through hole, and a plurality of steam channels 7 are formed between the cone-shaped baffle 21 and the water collecting disc 20. The water collecting tank 8 is an annular through tank, and the large end of the water collecting tray 20 is a low-level end and is positioned above the water collecting tank 8. The liquid collected in the water collection tray 20 flows to the water collection tank 8. The water collecting tank 8 is communicated with an external condensate pipe 17, and condensate water collected by the water collecting tank 8 enters a condensate water tank 18 through the condensate pipe 17. The annular structure of the water collecting tank 8 and the integral structure of the external through type phase change heat exchange monomer are arranged along with the shape, namely, if the cross section of the external through type phase change heat exchange monomer is of a rectangular structure, the water collecting tank 8 is of a rectangular annular structure, and if the cross section of the external through type phase change heat exchange monomer is of a circular structure, the water collecting tank 8 is of a circular annular structure.
A bracket 11 is fixedly arranged at the bottom of the lowest shell 1, and the bracket 11 realizes the fixed installation relative to the ground. By the design, cavitation which can occur in the water pump when the residual liquid to be flashed is discharged through the liquid outlet 9 to be flashed and an external drainage pump is effectively avoided, and further smooth discharge of the residual liquid to be flashed is ensured.
Two converging channels 12 are arranged at the upper part of the shell 1, when N=1, one end of the heat exchange tube bundle is communicated with the liquid inlet tube 14 of the liquid to be heated through one converging channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply tube 13 of the liquid to be heated through the other converging channel; when N is more than or equal to 2, one confluence channel in the N effect is communicated with the liquid inlet pipe 14 to be heated, two confluence channels in the same side of each two adjacent effects are respectively communicated through the liquid conveying pipe 15 to be heated, the other confluence channel in the first effect is communicated with the liquid supplying pipe 13 to be heated, the liquid to be heated sequentially passes through the liquid inlet pipe 14 to be heated and the liquid conveying pipes 15 to be heated, and finally flows out through the liquid supplying pipe 13 to be heated.
The second embodiment is as follows: as shown in fig. 1 to 5, the heat exchange tube bundle 3 in each effect comprises a plurality of heat exchange straight tubes parallel to each other, and the plurality of heat exchange straight tubes are horizontally laid on the upper part of the cavity structure.
And a third specific embodiment: as shown in fig. 1 to 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 coaxially and horizontally arranged in sequence from inside to outside. Each heat exchange bent pipe is in an annular structure.
The specific embodiment IV is as follows: as shown in fig. 1 to 5, when N is 3, the flash chambers are flash chambers of first effect 101 to third effect 103 in sequence from top to bottom.
The liquid to be flashed enters the flash chamber in the first effect 101 from the side to flash, the pressure in the flash chamber is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed due to the action of the vacuum pump, the liquid to be flashed is flashed and evaporated immediately, and the obtained vapor is condensed after heat exchange is carried out on the obtained vapor and the liquid to be heated in the heat exchange tube bundle in the first effect 101 along the space pressure gradient;
the liquid outlet to be flashed communicated with the lower side wall of the flash chamber of the previous effect is communicated with the spray pipe communicated with the upper side wall of the flash chamber of the next effect through the 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 on one side wall of the flash chamber, enters the flash chamber of the second effect 102 through the liquid conveying pipe 22 to be flashed and the spray pipe, is flashed again, the generated steam exchanges heat with the heat exchange tube bundles of the second effect 102 upwards, the residual liquid to be flashed enters the flash chamber of the third effect 103 for flash evaporation again, and the generated steam exchanges heat with the heat exchange tube bundles of the third effect 103 upwards. The rest liquid to be flashed is discharged through the outlet of the liquid to be flashed on the side wall of the flash chamber of the third effect 103 and the externally connected drainage 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 through the heat exchange tube bundles from the Nth effect to the first effect in sequence from bottom to top, exchanges heat with steam through the heat exchange tube bundles, and flows out from the upper part to be supplied to a heat user or flows to a cooling tower or other purposes after being heated. The liquid supply pipe 13 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 liquid supply pipes 15 to be heated, the liquid inlet pipe 14 to be heated is communicated with the other confluence channel 12 in the third effect 103, and the liquid to be heated sequentially passes through the liquid inlet pipe 14 to be heated and the two liquid supply pipes 15 to be heated and finally flows out through the liquid supply pipe 13 to be heated to supply heat to a heat user. Other compositions and connection relationships are the same as those of the first, second or third embodiments.
Claims (6)
1. An externally connected through-type phase change heat transfer device is characterized in that: the flash evaporation device comprises N external through type phase change heat exchange monomers, wherein N is more than or equal to 1, each external through type phase change heat exchange monomer comprises a shell (1) and a spray pipe (4), the shell (1) is arranged in a sealing way and is in a cavity structure, the shell (1) is communicated and provided with a vacuum pump (19), the interior of the shell (1) is vacuumized through the vacuum pump (19), a heat exchange tube bundle (3) is arranged at the upper part of the cavity structure, a flash evaporation chamber (2) is formed at the lower part of the cavity structure through the actions of the vacuum pump (19) and the heat exchange tube bundle (3), the spray pipes (4) are communicated with the upper side wall of the flash evaporation chamber (2) and are horizontally arranged to realize lateral liquid feeding, the liquid to be flash evaporated enters the flash evaporation chamber (2) through the spray pipes (4), the obtained vapor after flash evaporation moves upwards to the upper part of the cavity structure and exchanges heat with the liquid to be heated in the heat exchange tube bundle (3), the liquid to be heated in the heat exchange tube bundle (3) rises in temperature, a liquid to be heated outlet (9) is formed at the upper part of the shell (1), the liquid to be flash evaporated after the liquid flows out through the flash evaporation outlet (9),
the spray pipe (4) is in a conical pipe structure or a straight pipe structure,
a demister (5) is horizontally arranged in the middle of the cavity structure in the shell (1),
a water collecting device (6) is arranged between the heat exchange tube bundle (3) and the demister (5) to collect steam condensate,
the water collecting device (6) comprises a water collecting disc (20) and a water collecting tank (8), wherein the water collecting disc (20) is of a cone-shaped structure, a through hole is formed in the middle of the water collecting disc (20), a cone-shaped baffle (21) is fixedly arranged above the water collecting disc (20), the cone-shaped baffle (21) is located right above the through hole, and a plurality of steam channels (7) are formed between the cone-shaped baffle (21) and the water collecting disc (20); the water collecting tank (8) is an annular through tank, the large end of the water collecting tray (20) is a low-level end and is positioned above the water collecting tank (8), and liquid collected by the water collecting tray (20) flows to the water collecting tank (8);
when N is more than or equal to 2, N externally connected straight-through phase change heat exchange monomers are sequentially communicated from top to bottom to form a first effect to an nth effect, the liquid to be flashed after the last effect is flashed in the next effect through a liquid outlet (9) to be flashed in the last effect and a liquid inlet to be flashed in the next effect, and the liquid to be flashed after the nth effect is flashed flows into a liquid water withdrawal pipe (10) to be flashed through the liquid outlet (9) to be flashed in the nth effect;
two converging channels (12) are arranged at the upper part of the shell (1), when N=1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe (14) to be heated through one converging channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply pipe (13) to be heated through the other converging channel; when N is more than or equal to 2, one confluence channel in the N effect is communicated with a liquid inlet pipe (14) of 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) to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe (13) of liquid to be heated.
2. An externally connected straight through phase change thermal 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 one end of the spray pipe (4) positioned outside the flash chamber is a liquid inlet to be flashed.
3. An externally connected straight through phase change thermal device according to claim 1, 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 a liquid outlet (9) to be flashed in the effect.
4. An externally connected straight through phase change thermal device according to claim 1, 2 or 3, characterized in that: the bottom of the shell (1) at the lowest part is fixedly provided with a bracket (11), and the fixed installation of the shell relative to the ground is realized through the bracket (11).
5. An externally connected straight through phase change thermal device according to claim 1, wherein: the heat exchange tube bundles (3) in each effect comprise 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.
6. An externally connected straight through phase change thermal device according to claim 1, wherein: the heat exchange tube bundles (3) in each effect comprise at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are coaxially and horizontally arranged in sequence 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111504097A CN111504097A (en) | 2020-08-07 |
| CN111504097B true CN111504097B (en) | 2023-11-14 |
Family
ID=71869515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010346406.0A Active CN111504097B (en) | 2020-04-27 | 2020-04-27 | Externally-connected straight-through phase change heat exchange device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111504097B (en) |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111504097A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101921036A (en) | Constant-pressure multiple-effect evaporation condensation sea water desalination device with air medium | |
| CN212227823U (en) | Horizontal straight-through type phase change heat exchange device | |
| CN107362560A (en) | Falling film evaporator in the two phase countercurrent flow vertical tube of surrounding tangential admission | |
| CN210030096U (en) | High-temperature sewage heat exchange system | |
| CN201837266U (en) | High-efficient vacuumizing condensation unit | |
| CN209790898U (en) | Horizontal pipe falling film evaporator | |
| CN111504097B (en) | Externally-connected straight-through phase change heat exchange device | |
| CN212227822U (en) | External connection straight-through type phase change heat exchange device | |
| CN107551580A (en) | A kind of vertical falling-film heat exchanger | |
| CN104864376A (en) | Heat-pipe type falling film evaporation low-temperature waste heat utilization and water recovery equipment | |
| CN202315342U (en) | Horizontal pipe falling film evaporation tower | |
| CN102512833A (en) | Horizontal-pipe falling-film evaporation method coupling distillation and device thereof | |
| CN206809809U (en) | A kind of purification vacuum distillation apparatus | |
| CN207694272U (en) | A kind of vertical falling-film heat exchanger | |
| CN101653664B (en) | Plate-type falling film evaporator | |
| CN212227824U (en) | Straight-through phase change heat exchange device | |
| CN214861218U (en) | Energy-concerving and environment-protective vacuum decompression evaporator | |
| CN214808484U (en) | Multiple-effect concentration evaporator | |
| CN111504098A (en) | Horizontal straight-through type phase change heat exchange device | |
| CN210813964U (en) | Horizontal pipe falling film evaporator | |
| CN111504096A (en) | Straight-through phase change heat exchange device | |
| CN211451940U (en) | Low-resistance liquid film water vapor condensing device and heat exchange system thereof | |
| CN207493455U (en) | A kind of vehicular glycol dehydration device and absorption system | |
| CN206434880U (en) | Falling film evaporator in the two phase countercurrent flow vertical tube of surrounding tangential admission | |
| CN210495257U (en) | Horizontal tube falling film evaporator with compact structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |