CN112556479A - Plate type double-falling film heat-mass exchanger - Google Patents
Plate type double-falling film heat-mass exchanger Download PDFInfo
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- CN112556479A CN112556479A CN202011521969.5A CN202011521969A CN112556479A CN 112556479 A CN112556479 A CN 112556479A CN 202011521969 A CN202011521969 A CN 202011521969A CN 112556479 A CN112556479 A CN 112556479A
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- phase fluid
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- 239000011552 falling film Substances 0.000 title claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 299
- 239000007791 liquid phase Substances 0.000 claims abstract description 139
- 239000012071 phase Substances 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims description 11
- 239000010408 film Substances 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 239000012808 vapor phase Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 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
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0015—Heat and mass exchangers, e.g. with permeable walls
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- 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 plate-type double-falling-film heat and mass exchanger, which comprises a first fluid flow channel and a second fluid flow channel which are formed by plate bundles and are arranged in a staggered manner, wherein a first gas-phase fluid cavity, a first liquid-phase fluid inlet cavity, a first liquid-phase fluid outlet cavity, a first gas-phase fluid inlet, a first liquid-phase fluid inlet and a first liquid-phase fluid outlet are sequentially arranged on the same side of the plate bundles from top to bottom; each plate is provided with an upper opening and a lower opening, the upper opening and the lower opening are communicated with the second fluid flow channel and sealed in the first fluid flow channel, the upper opening is connected with the second liquid-phase fluid inlet, and the lower opening is connected with the second liquid-phase fluid outlet. The invention has the advantages of improving the system efficiency, simplifying the system flow and improving the system compactness.
Description
Technical Field
The invention belongs to the technical field of heat pumps and heat exchange equipment, and particularly relates to a plate type double-falling-film heat and mass exchanger.
Background
In the field of absorption heat pumps such as multistage absorption heat pumps and second-class absorption heat pumps, two streams of fluid in an absorber of the absorption heat pump simultaneously perform heat and mass exchange, and in order to reduce heat transfer temperature difference as much as possible and improve system efficiency, the two streams of fluid are required to participate in heat and mass exchange in a falling film flowing mode. However, the absorption heat pump and the refrigerator adopt the traditional shell-and-tube structure, the heat and mass exchange mode of double falling films is difficult to realize, in practical application, the compromise modes such as adding intermediate heat media, adding intermediate heat exchange devices and the like are often used for replacing the heat and mass exchange process of double falling films approximately, but due to the increase of heat exchange links, the efficiency and complexity of the system are reduced, and the equipment cost is increased.
How to provide a double-falling film heat and mass exchanger, which improves the system efficiency of an absorption heat pump, simplifies the system flow of the absorption heat pump, improves the system compactness of the absorption heat pump, and reduces the production cost, has become a problem to be solved urgently.
Disclosure of Invention
In order to overcome a series of defects existing in the prior art, the present invention provides a plate-type dual-falling film heat and mass exchanger, which includes a first fluid flow channel 6 and a second fluid flow channel 5 formed by plate bundles in staggered arrangement, a first gas-phase fluid chamber 1, a first liquid-phase fluid inlet chamber 2, a first liquid-phase fluid outlet chamber 9, a first gas-phase fluid inlet 11, a first liquid-phase fluid inlet 12 and a first liquid-phase fluid outlet 13 are sequentially arranged on the same side of the plate bundles from top to bottom, a second gas-phase fluid chamber 7 and a second gas-phase fluid inlet/outlet 10 are arranged on the other side of the plate bundles, and a second liquid-phase fluid distribution device 4 is arranged above the second gas-phase fluid chamber 7 and the second gas-phase fluid inlet/outlet 10; each plate is provided with an upper opening and a lower opening, the upper opening and the lower opening are communicated with the second fluid flow channel 5 and sealed in the first fluid flow channel 6, the upper opening is connected with the second liquid phase fluid inlet 3, and the lower opening is connected with the second liquid phase fluid outlet 8.
Preferably, the first liquid phase fluid outlet chamber 9 is located at the bottom of one side of the first fluid flow channel 6 and the second fluid flow channel 5, the first liquid phase fluid inlet chamber 2 is located at the top of one side of the first fluid flow channel 6 and the second fluid flow channel 5, the first liquid phase fluid inlet chamber 2 is connected with the first liquid phase fluid inlet 12, and the first liquid phase fluid outlet chamber 9 is connected with the first liquid phase fluid outlet 13.
Preferably, the first liquid-phase fluid inlet chamber 2, the first liquid-phase fluid outlet chamber 9, the first liquid-phase fluid inlet 12 and the first liquid-phase fluid outlet 13 are configured to introduce the first liquid-phase fluid into and out of the first fluid channels 6, and the first liquid-phase fluid is collected by the first liquid-phase fluid inlet chamber 2 and the first liquid-phase fluid outlet chamber 9 and then enters and exits each of the first fluid channels 6 through the first liquid-phase fluid inlet 12 and the first liquid-phase fluid outlet 13.
Preferably, the second liquid phase fluid enters and exits each second fluid flow channel 5 through a second liquid phase fluid inlet 3 and a second liquid phase fluid outlet 8.
Preferably, each first fluid flow channel 6 is connected to a first gas-phase fluid chamber 1, the first gas-phase fluid chamber 1 being connected to a first gas-phase fluid inlet 11; each second fluid flow channel 5 is connected with a second gas-phase fluid cavity 7, and the second gas-phase fluid cavity 7 is connected with a second gas-phase fluid inlet and outlet 10; a first gas-phase fluid chamber 1, a second gas-phase fluid chamber 7, a first gas-phase fluid inlet 11 and a second gas-phase fluid outlet 10 for introducing and extracting gas-phase fluid into and out of the respective flow channels.
Preferably, each of the first fluid flow channel 6 and the second fluid flow channel 5 is provided with a liquid distribution device, so as to ensure that the corresponding liquid phase fluid adheres to the wall surface to form a liquid film flowing downwards, the first liquid phase fluid distribution device 14 is located above each of the first fluid flow channels 6, and the second liquid phase fluid distribution device 4 is located below the upper opening.
Preferably, the gas phase fluid in each of the first fluid flow channels 6 and the second fluid flow channels 5 is free to flow between the falling films of liquid phase fluid and either enters or exits each of the first fluid flow channels 6 through the first gas phase fluid chamber 1 or enters or exits the second fluid flow channels 5 through the second gas phase fluid chamber 7.
Preferably, the first liquid-phase fluid inlet cavity 2 and the first liquid-phase fluid distribution device 14 are of the same component structure.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention provides a plate-type double-falling-film heat and mass exchanger, which can be applied to the field of absorption heat pumps such as a multistage absorption heat pump and a second-class absorption heat pump, can also be applied to other technical scenes needing a double-falling-film heat and mass exchange mode, and has the advantages of improving the system efficiency, simplifying the system flow and improving the system compactness;
2) the invention provides a plate-type double-falling-film heat and mass exchanger.A first liquid phase fluid and a second liquid phase fluid both participate in a heat and mass exchange process in the flowing form of falling films in respective flow channels, the heat exchange mainly occurs between the first liquid phase fluid and the second liquid phase fluid through dividing wall type heat exchange, and the mass exchange occurs between the first liquid phase fluid and a first gas phase fluid as well as between the second liquid phase fluid and a second gas phase fluid.
Drawings
FIG. 1 is a side cross-sectional view of a plate-type dual falling film heat and mass exchanger of the present invention;
fig. 2 is a top view of a plate-type dual falling film heat and mass exchanger of the present invention.
The reference numbers in the figures are:
1-a first gas phase fluid cavity, 2-a first liquid phase fluid inlet cavity, 3-a second liquid phase fluid inlet, 4-a second liquid phase fluid distribution device, 5-a second fluid flow channel, 6-a first fluid flow channel, 7-a second gas phase fluid cavity, 8-a second liquid phase fluid outlet, 9-a first liquid phase fluid outlet cavity, 10-a second gas phase fluid inlet and outlet, 11-a first gas phase fluid inlet, 12-a first liquid phase fluid inlet, 13-a first liquid phase fluid outlet and 14-a first liquid phase fluid distribution device.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used in the explanation of the invention, and should not be construed as limiting the invention.
The plate type double falling film heat and mass exchanger of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, a plate-type dual-falling film heat and mass exchanger includes a first fluid flow channel 6 and a second fluid flow channel 5 formed by plate bundles in staggered arrangement, a first gas-phase fluid chamber 1, a first liquid-phase fluid inlet chamber 2, a first liquid-phase fluid outlet chamber 9, a first gas-phase fluid inlet 11, a first liquid-phase fluid inlet 12 and a first liquid-phase fluid outlet 13 are sequentially arranged on the same side of the plate-type dual-falling film heat and mass exchanger from top to bottom, a second gas-phase fluid chamber 7 and a second gas-phase fluid inlet/outlet 10 are arranged on the other side of the plate-type dual-falling film heat and mass exchanger, and a second liquid-phase fluid distribution device 4 is arranged above the second gas-phase fluid chamber 7 and the second; each plate is provided with an upper opening and a lower opening, the upper opening and the lower opening are communicated with the second fluid flow channel 5 and sealed in the first fluid flow channel 6, the upper opening is connected with the second liquid phase fluid inlet 3, and the lower opening is connected with the second liquid phase fluid outlet 8.
Preferably, the first liquid phase fluid outlet chamber 9 is located at the bottom of one side of the first fluid flow channel 6 and the second fluid flow channel 5, the first liquid phase fluid inlet chamber 2 is located at the top of one side of the first fluid flow channel 6 and the second fluid flow channel 5, the first liquid phase fluid inlet chamber 2 is connected with the first liquid phase fluid inlet 12, and the first liquid phase fluid outlet chamber 9 is connected with the first liquid phase fluid outlet 13.
Preferably, the first liquid-phase fluid inlet chamber 2, the first liquid-phase fluid outlet chamber 9, the first liquid-phase fluid inlet 12 and the first liquid-phase fluid outlet 13 are configured to introduce the first liquid-phase fluid into and out of the first fluid channels 6, and the first liquid-phase fluid is collected by the first liquid-phase fluid inlet chamber 2 and the first liquid-phase fluid outlet chamber 9 and then enters and exits each of the first fluid channels 6 through the first liquid-phase fluid inlet 12 and the first liquid-phase fluid outlet 13.
Preferably, the second liquid phase fluid enters and exits each second fluid flow channel 5 through a second liquid phase fluid inlet 3 and a second liquid phase fluid outlet 8.
Preferably, each first fluid flow channel 6 is connected to a first gas-phase fluid chamber 1, the first gas-phase fluid chamber 1 being connected to a first gas-phase fluid inlet 11; each second fluid flow channel 5 is connected with a second gas-phase fluid cavity 7, and the second gas-phase fluid cavity 7 is connected with a second gas-phase fluid inlet and outlet 10; a first gas-phase fluid chamber 1, a second gas-phase fluid chamber 7, a first gas-phase fluid inlet 11 and a second gas-phase fluid outlet 10 for introducing and extracting gas-phase fluid into and out of the respective flow channels.
Preferably, each of the first fluid flow channel 6 and the second fluid flow channel 5 is provided with a liquid distribution device, so as to ensure that the corresponding liquid phase fluid adheres to the wall surface to form a liquid film flowing downwards, the first liquid phase fluid distribution device 14 is located above each of the first fluid flow channels 6, and the second liquid phase fluid distribution device 4 is located below the upper opening.
Preferably, the gas phase fluid in each of the first fluid flow channels 6 and the second fluid flow channels 5 is free to flow between the falling films of liquid phase fluid and either enters or exits each of the first fluid flow channels 6 through the first gas phase fluid chamber 1 or enters or exits the second fluid flow channels 5 through the second gas phase fluid chamber 7.
Preferably, the first liquid-phase fluid inlet cavity 2 and the first liquid-phase fluid distribution device 14 are of the same component structure.
The present invention will be described in further detail below by way of example of the present invention applied to a process in which both a first liquid-phase fluid and a second liquid-phase fluid participate in heat and mass exchange in the form of falling film flows in respective flow channels.
In the preferred embodiment, heat exchange occurs between the first liquid phase fluid and the second liquid phase fluid primarily by recuperative heat exchange, and mass exchange occurs between the first liquid phase fluid and the first vapor phase fluid, the second liquid phase fluid, and the second vapor phase fluid. The following description will be made by taking the first liquid phase fluid as an example to absorb the first gas phase fluid and the second liquid phase fluid as an example to separate (evaporate, generate) the second gas phase fluid, and the plate type double falling film heat and mass exchanger is described in which the separation and absorption processes are exchanged between the first fluid flow channel and the second fluid flow channel.
In the preferred embodiment, the plate type double falling film heat and mass exchanger forms the first fluid flow channel 6 and the second fluid flow channel 5 which are arranged in a staggered mode through the plate bundle.
In the preferred embodiment, the first gas phase fluid enters the first gas phase fluid cavity 1 through the first gas phase fluid inlet 11 at the top of one side of the double falling film heat and mass exchanger and is distributed to each first fluid flow channel 6 communicated with the first gas phase fluid cavity 1, and the first gas phase fluid is absorbed by the first liquid phase fluid in the first fluid flow channel 6; the first liquid phase fluid enters the first liquid phase fluid inlet cavity 2 through the first liquid phase fluid inlet 12 on the same side of the plate type double falling film heat-mass exchanger and below the first gas phase fluid inlet and outlet 11 and is distributed in each first fluid flow channel 6 communicated with the first liquid phase fluid cavity 2, liquid films flowing downwards along the wall surfaces of the respective flow channels are formed through the liquid distribution device, and the first liquid phase fluid after heat-mass exchange leaves the plate type double falling film heat-mass exchanger from the first liquid phase fluid outlet 13 at the bottom of the same side of the plate type double falling film heat-mass exchanger.
In the preferred embodiment, each plate is provided with an upper opening and a lower opening, the upper opening is connected with the second liquid phase fluid inlet 3, the lower opening is connected with the second liquid phase fluid outlet 8, and the upper opening and the lower opening are both communicated with the second fluid flow channel 5 and sealed in the first fluid flow channel 6; the second liquid phase fluid enters the plate-type double-falling-film heat and mass exchanger from the second liquid phase fluid inlet 3 through an upper opening, and forms a liquid film attached to the wall surface of a flow passage to flow downwards through each second liquid phase fluid liquid distribution device 4 in the second fluid flow passage 5, and the second liquid phase fluid completing heat and mass exchange leaves the plate-type double-falling-film heat and mass exchanger from the second liquid phase fluid outlet 8 through lower openings of each plate; the second gas-phase fluid separated from the second liquid-phase fluid is collected from each flow channel into the second gas-phase fluid chamber 7, and leaves the plate-type double falling film heat and mass exchanger through the second gas-phase fluid outlet 10 at one side of the double falling film heat and mass exchanger.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A plate-type double-falling-film heat and mass exchanger is characterized by comprising a first fluid flow channel (6) and a second fluid flow channel (5) which are formed by plate bundles and are arranged in a staggered manner, wherein a first gas-phase fluid cavity (1), a first liquid-phase fluid inlet cavity (2), a first liquid-phase fluid outlet cavity (9), a first gas-phase fluid inlet (11), a first liquid-phase fluid inlet (12) and a first liquid-phase fluid outlet (13) are sequentially arranged on the same side of the first fluid flow channel and the second fluid flow channel from top to bottom, a second gas-phase fluid cavity (7) and a second gas-phase fluid inlet and outlet (10) are arranged on the other side of the first fluid flow channel and the second fluid flow channel, and a second liquid-phase fluid liquid distribution device (4) is arranged above the second gas-phase; each plate is provided with an upper opening and a lower opening, the upper opening and the lower opening are communicated with the second fluid flow channel (5) and sealed in the first fluid flow channel (6), the upper opening is connected with the second liquid phase fluid inlet (3), and the lower opening is connected with the second liquid phase fluid outlet (8).
2. A plate type double falling film heat and mass exchanger according to claim 1, wherein the first liquid phase fluid outlet chamber (9) is located at the bottom of one side of the first fluid flow channel (6) and the second fluid flow channel (5), the first liquid phase fluid inlet chamber (2) is located at the top of one side of the first fluid flow channel (6) and the second fluid flow channel (5), the first liquid phase fluid inlet chamber (2) is connected to the first liquid phase fluid inlet (12), and the first liquid phase fluid outlet chamber (9) is connected to the first liquid phase fluid outlet (13).
3. A plate type double falling film heat and mass exchanger according to claim 2, wherein the first liquid phase fluid inlet chamber (2), the first liquid phase fluid outlet chamber (9), the first liquid phase fluid inlet (12) and the first liquid phase fluid outlet (13) are configured to introduce the first liquid phase fluid into and out of the first fluid flow channels (6), and the first liquid phase fluid is collected by the first liquid phase fluid inlet chamber (2) and the first liquid phase fluid outlet chamber (9) and then enters and exits each of the first fluid flow channels (6) through the first liquid phase fluid inlet (12) and the first liquid phase fluid outlet (13).
4. A plate dual falling film heat and mass exchanger according to claim 1 wherein a second liquid phase fluid enters and exits each second fluid flow channel (5) through a second liquid phase fluid inlet (3) and a second liquid phase fluid outlet (8).
5. A plate-type dual falling film heat and mass exchanger according to claim 1 wherein each first fluid flow channel (6) is connected to a first gas phase fluid chamber (1), the first gas phase fluid chamber (1) being connected to a first gas phase fluid inlet (11); each second fluid flow channel (5) is connected with a second gas-phase fluid cavity (7), and the second gas-phase fluid cavity (7) is connected with a second gas-phase fluid inlet and outlet (10); the device comprises a first gas-phase fluid cavity (1), a second gas-phase fluid cavity (7), a first gas-phase fluid inlet (11) and a second gas-phase fluid outlet (10) which are used for leading gas-phase fluid into and out of respective flow channels.
6. A plate type double falling film heat and mass exchanger according to any one of claims 1 to 5, wherein each of the first fluid flow passage (6) and the second fluid flow passage (5) is provided with a liquid distribution device which is independent of each other to ensure that the corresponding liquid phase fluid adheres to the wall surface to form a liquid film flowing downwards, the first liquid phase fluid distribution device (14) is positioned above each of the first fluid flow passages (6), and the second liquid phase fluid distribution device (4) is positioned below the upper opening.
7. A plate type double falling film heat and mass exchanger according to claim 6 wherein the gas phase fluid in each of the first fluid flow channels (6) and the second fluid flow channels (5) is free to flow between the falling liquid phase fluid films and into and out of each of the first fluid flow channels (6) through the first gas phase fluid chamber (1) or into and out of the second fluid flow channels (5) through the second gas phase fluid chamber (7).
8. A plate type double falling film heat and mass exchanger according to claim 6, wherein the first liquid phase fluid inlet chamber (2) and the first liquid phase fluid distribution device (14) are of the same component structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011521969.5A CN112556479B (en) | 2020-12-21 | Plate type double falling film heat and mass exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011521969.5A CN112556479B (en) | 2020-12-21 | Plate type double falling film heat and mass exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112556479A true CN112556479A (en) | 2021-03-26 |
| CN112556479B CN112556479B (en) | 2024-10-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2816647Y (en) * | 2003-12-21 | 2006-09-13 | 袁一军 | Partition-type solution-medium type all-heat recovering apparatus |
| US20100065262A1 (en) * | 2008-09-18 | 2010-03-18 | Multistack Llc | Double inlet heat exchanger |
| CN204745712U (en) * | 2015-05-15 | 2015-11-11 | 吴利敏 | Biliquid is flow pattern plate tower in turn |
| CN111589276A (en) * | 2020-06-22 | 2020-08-28 | 中化蓝天霍尼韦尔新材料有限公司 | Stable and efficient gas falling film absorption system and method |
| CN111780608A (en) * | 2020-07-14 | 2020-10-16 | 北京石油化工学院 | Dividing wall type heat exchanger based on hollow ball complex channel |
| CN215864828U (en) * | 2020-12-21 | 2022-02-18 | 清华大学 | Plate type double-falling film heat-mass exchanger |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2816647Y (en) * | 2003-12-21 | 2006-09-13 | 袁一军 | Partition-type solution-medium type all-heat recovering apparatus |
| US20100065262A1 (en) * | 2008-09-18 | 2010-03-18 | Multistack Llc | Double inlet heat exchanger |
| CN204745712U (en) * | 2015-05-15 | 2015-11-11 | 吴利敏 | Biliquid is flow pattern plate tower in turn |
| CN111589276A (en) * | 2020-06-22 | 2020-08-28 | 中化蓝天霍尼韦尔新材料有限公司 | Stable and efficient gas falling film absorption system and method |
| CN111780608A (en) * | 2020-07-14 | 2020-10-16 | 北京石油化工学院 | Dividing wall type heat exchanger based on hollow ball complex channel |
| CN215864828U (en) * | 2020-12-21 | 2022-02-18 | 清华大学 | Plate type double-falling film heat-mass exchanger |
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