Lithium bromide heat pump integrated composite generator-condenser based on hollow fiber membrane and system

Abstract

The application discloses a lithium bromide heat pump integrated composite generator-condenser and system based on a hollow fiber membrane, utilizes industrial waste heat as a high-temperature heat source, combines membrane heat mass transfer technology of the hollow fiber membrane, combines a generator and a condenser in a lithium bromide absorption heat pump, and forms an integrated composite generator-condenser structure. The industrial waste heat is used as a high-temperature heat source to heat a dilute lithium bromide solution, water vapor in the high-temperature lithium bromide solution penetrates into a water vapor layer through the hollow fiber membrane due to a steam pressure difference, and the water vapor is cooled by circulating cooling water to realize simultaneous heat and working medium transfer. The condensed water does work in an evaporator and enters an absorber to be sprayed and mixed with a concentrated lithium bromide solution, and then enters the integrated composite generator-condenser again to circulate. The composite generator-condenser discards a form that a traditional evaporator and an absorber are separated, greatly reduces a land occupation area of the equipment, simultaneously avoids medium transportation between the equipment, reduces heat loss, and improves a performance coefficient of the heat pump.

Description

Technical Field

[0001] This invention belongs to the field of absorption lithium bromide heat pump technology, specifically relating to an integrated composite generator-condenser and system based on a hollow fiber membrane lithium bromide heat pump. Background Technology

[0002] The consumption of traditional energy sources has become a significant factor restricting the progress of sustainable development. Faced with a severe energy situation, we must accelerate the development of new energy sources and improve energy efficiency. my country has abundant waste heat resources. Traditional coal-fired power generation and industrial processes generate a large amount of waste heat, which is difficult to utilize due to its low grade. Lithium bromide heat pumps offer advantages such as high efficiency, energy saving, environmental friendliness, and safety. Utilizing lithium bromide absorption heat pump technology can convert low-grade heat energy into high-grade heat energy, achieving the goals of waste heat utilization and energy conservation. However, existing lithium bromide heat pumps have separate condensers and generators, requiring significant space for installation. Furthermore, heat loss is inevitable during heat transfer between different devices, severely limiting the operating efficiency of lithium bromide heat pumps. Summary of the Invention

[0003] This invention addresses the characteristics of equipment layout in existing lithium bromide heat pump technology by providing an integrated composite generator-condenser system based on hollow fiber membrane for lithium bromide heat pumps. This system can arrange the generator and condenser of a lithium bromide absorption heat pump in the same device, effectively reducing heat loss and the space required for equipment layout.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An integrated composite generator-condenser based on a hollow fiber membrane lithium bromide heat pump is constructed from multiple sets of basic functional units connected in series and parallel.

[0006] Each basic functional unit includes a casing, and from left to right arranged inside the casing are a sixth metal heat exchange plate, a fourth metal heat exchange plate, a second heat and mass transfer hollow fiber membrane plate, a second metal heat exchange plate, a first metal heat exchange plate, a first heat and mass transfer hollow fiber membrane plate, a third metal heat exchange plate, and a fifth metal heat exchange plate; both ends of the casing are respectively provided with leak-proof unit sealing plates.

[0007] The top of the casing has an inlet for high-temperature waste heat medium, an inlet for dilute lithium bromide solution, and an inlet for circulating cooling water. The bottom has an outlet for high-temperature waste heat medium after processing, an outlet for concentrated lithium bromide solution, a pipe for two-phase water vapor flow, and an outlet for circulating cooling water.

[0008] All metal heat exchange plates and all heat and mass transfer hollow fiber membrane plates have an inlet for high-temperature waste heat medium, an inlet for dilute lithium bromide solution, and an inlet for circulating cooling water at one end, and an outlet for high-temperature waste heat medium after processing, an outlet for circulating cooling water, a port for two-phase water vapor flow, and an outlet for concentrated lithium bromide solution at the other end.

[0009] Waste heat source is introduced between the second and first metal heat exchange plates. Dilute lithium bromide solution is introduced between the first and first heat and mass transfer hollow fiber membrane plates, and between the second and second heat and mass transfer hollow fiber membrane plates. Water vapor is introduced between the first and third metal heat exchange plates, between the second and fourth metal heat exchange plates, between the fifth and corresponding leak-proof unit sealing plates, and between the sixth and corresponding leak-proof unit sealing plates. Circulating cooling water is introduced between the third and fifth metal heat exchange plates and between the sixth and fourth metal heat exchange plates.

[0010] A further improvement of the present invention is that the high-temperature waste heat medium inlet, the lithium bromide dilute solution inlet, and the circulating cooling water inlet on the top of the casing are arranged diagonally with the high-temperature waste heat medium outlet after work, the lithium bromide concentrated solution outlet, the pipe opening for the flowing water vapor two-phase flow, and the circulating cooling water outlet on the bottom of the casing.

[0011] A further improvement of the present invention is that a narrow rectangular space is formed between two adjacent metal heat exchange plates, between the metal heat exchange plate and the heat and mass transfer hollow fiber membrane plate, and between the metal heat exchange plate and the leak-proof unit sealing plate.

[0012] A further improvement of the present invention is that each metal heat exchange plate is a heat exchange plate with metal corrugations.

[0013] A further improvement of the present invention is that each heat and mass transfer hollow fiber membrane plate is a polymer hydrophobic microporous membrane.

[0014] An absorption lithium bromide heat pump system based on an integrated generator-condenser, the system being based on the aforementioned hollow fiber membrane-based lithium bromide heat pump integrated composite generator-condenser, includes: a cooling tower, an absorber, an evaporator, and a heat exchanger.

[0015] The pipe opening for the two-phase flow of water vapor on the shell is connected to the condensate inlet of the evaporator, the low-pressure steam outlet of the evaporator is connected to the low-pressure steam inlet of the absorber, the circulating cooling water outlet on the shell is connected to the circulating cooling water inlet of the absorber, and the circulating cooling water outlet of the absorber is connected to the circulating cooling water inlet on the shell through the cooling tower.

[0016] The dilute lithium bromide solution outlet of the absorber is connected to the dilute lithium bromide solution inlet of the heat exchanger, the dilute lithium bromide solution outlet of the heat exchanger is connected to the dilute lithium bromide solution inlet of the cladding, the concentrated lithium bromide solution outlet of the cladding is connected to the concentrated lithium bromide solution inlet of the heat exchanger, and the concentrated lithium bromide solution outlet of the heat exchanger is connected to the concentrated lithium bromide solution inlet of the absorber.

[0017] A further improvement of the present invention is that an expansion valve is provided on the pipe connecting the port of the two-phase flow of water vapor on the shell to the condensate inlet of the evaporator.

[0018] A further improvement of the present invention is that a circulating cooling water pump is installed on the pipe connecting the outlet of the absorber to the cooling tower.

[0019] A further improvement of the present invention is that the evaporator is also provided with an evaporator chilled water inlet and an evaporator chilled water outlet.

[0020] A further improvement of the present invention is that the temperature of the chilled water is 4°C.

[0021] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0022] This invention provides an integrated lithium bromide heat pump generator-condenser based on a hollow fiber membrane. It abandons the traditional separate arrangement of the generator and condenser in lithium bromide heat pumps, utilizing the properties of the hollow fiber membrane to integrate the two devices into a single unit. This avoids the transfer of media and energy between the devices, reducing material and energy losses and improving the coefficient of performance (COP) of the heat pump. Since the various media in the integrated integrated generator-condenser do not directly contact each other, the equipment operates more stably and is applicable to a wider range of waste heat sources. The flexible series-parallel modular arrangement of the unit groups in the integrated integrated generator-condenser can meet the waste heat utilization needs of different capacities.

[0023] The absorption lithium bromide heat pump system based on an integrated generator-condenser provided by this invention has a higher degree of equipment integration and is simpler and more reliable in composition compared to traditional systems. Compared to traditional absorption lithium bromide heat pump systems, this system significantly reduces the equipment's footprint and system layout space, which is beneficial for the miniaturization and flexible layout of absorption heat pump systems. It also has higher system efficiency compared to traditional lithium bromide absorption heat pumps.

[0024] In summary, this invention innovatively realizes an integrated composite generator-condenser based on hollow fiber membranes. By utilizing a plate heat exchanger and combining the heat and mass transfer characteristics of hollow fiber membranes, it can simultaneously function as both a generator and a condenser in a traditional lithium bromide absorption heat pump system. This significantly reduces heat loss during medium transfer between different devices, saves space required for equipment layout, and improves the system efficiency of the lithium bromide heat pump. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the integrated composite generator-condenser of lithium bromide heat pump based on hollow fiber membrane according to the present invention.

[0026] Figure 2 This is a schematic diagram of the layout of the absorption lithium bromide heat pump system based on an integrated generator-condenser according to the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-First metal heat exchange plate, 2-Second metal heat exchange plate, 3-First heat and mass transfer hollow fiber membrane plate, 4-Second heat and mass transfer hollow fiber membrane plate, 5-Third metal heat exchange plate, 6-Fourth metal heat exchange plate, 7-Fifth metal heat exchange plate, 8-Sixth metal heat exchange plate, 9-High-temperature waste heat medium inlet on the plate, 10-High-temperature waste heat medium outlet after processing on the plate, 11-Lithium bromide dilute solution inlet on the plate, 12-Lithium bromide concentrated solution outlet on the plate, 13-Pipe for flowing water vapor two-phase flow on the plate. 14-Onboard circulating cooling water inlet, 15-Onboard circulating cooling water outlet, 16-Onboard high-temperature waste heat medium inlet, 17-Onboard high-temperature waste heat medium outlet after processing, 18-Onboard lithium bromide dilute solution inlet, 19-Onboard lithium bromide concentrated solution outlet, 20-Onboard pipe for flowing water vapor two-phase flow, 21-Onboard circulating cooling water inlet, 22-Onboard circulating cooling water outlet, 23-Leakage prevention unit sealing plate, 24-Integrated composite generator condenser;

[0029] Circulating cooling water line: 25-Cooling tower, 26-Circulating cooling water pump, 27-Absorber circulating cooling water outlet, 28-Absorber, 29-Absorber circulating cooling water inlet;

[0030] Water vapor two-phase flow line: 30-expansion valve, 31-evaporator condensate inlet, 32-evaporator, 33-evaporator chilled water inlet, 34-evaporator chilled water outlet, 35-evaporator low-pressure steam outlet, 36-absorber low-pressure steam inlet;

[0031] Lithium bromide solution route: 37-Absorber lithium bromide dilute solution outlet, 38-Absorber lithium bromide concentrated solution inlet, 39-Heat exchanger, 40-Heat exchanger lithium bromide dilute solution inlet, 41-Heat exchanger lithium bromide dilute solution outlet, 42-Heat exchanger lithium bromide concentrated solution inlet, 43-Heat exchanger lithium bromide concentrated solution outlet. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0033] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Example 1

[0041] refer to Figure 1 The integrated composite generator-condenser based on hollow fiber membrane lithium bromide heat pump provided in this embodiment is composed of multiple sets of basic functional units connected in series and parallel.

[0042] Each basic functional unit includes a casing, and from left to right arranged inside the casing are the sixth metal heat exchange plate 8, the fourth metal heat exchange plate 6, the second heat and mass transfer hollow fiber membrane plate 4, the second metal heat exchange plate 2, the first metal heat exchange plate 1, the first heat and mass transfer hollow fiber membrane plate 3, the third metal heat exchange plate 5, and the fifth metal heat exchange plate 7; both ends of the casing are respectively provided with leak-proof unit sealing plates 23;

[0043] The top of the casing is provided with a high-temperature waste heat medium inlet 16, a lithium bromide dilute solution inlet 18, and a circulating cooling water inlet 21. The bottom is provided with a high-temperature waste heat medium outlet 17, a lithium bromide concentrated solution outlet 19, a water vapor two-phase flow port 20, and a circulating cooling water outlet 22.

[0044] All metal heat exchange plates and all heat and mass transfer hollow fiber membrane plates have a high-temperature waste heat medium inlet 9, a lithium bromide dilute solution inlet 11 and a circulating cooling water inlet 14 at one end, and a high-temperature waste heat medium outlet 10, a circulating cooling water outlet 15, a water vapor two-phase flow port 13 and a lithium bromide concentrated solution outlet 12 at the other end.

[0045] Waste heat source is introduced between the second metal heat exchange plate 2 and the first metal heat exchange plate 1. Dilute lithium bromide solution is introduced between the first metal heat exchange plate 1 and the first heat and mass transfer hollow fiber membrane plate 3, and between the second metal heat exchange plate 2 and the second heat and mass transfer hollow fiber membrane plate 4. Water vapor is introduced between the first heat and mass transfer hollow fiber membrane plate 3 and the third metal heat exchange plate 5, between the second heat and mass transfer hollow fiber membrane plate 4 and the fourth metal heat exchange plate 6, between the fifth metal heat exchange plate 7 and the corresponding leak-proof unit sealing plate 23, and between the sixth metal heat exchange plate 8 and the corresponding leak-proof unit sealing plate 23. Circulating cooling water is introduced between the third metal heat exchange plate 5 and the fifth metal heat exchange plate 7, and between the sixth metal heat exchange plate 8 and the fourth metal heat exchange plate 6.

[0046] In this embodiment, the high-temperature waste heat medium inlet 16, the lithium bromide dilute solution inlet 18, and the circulating cooling water inlet 21 on the top of the casing are arranged diagonally with the high-temperature waste heat medium outlet 17, the lithium bromide concentrated solution outlet 19, the water vapor two-phase flow port 20, and the circulating cooling water outlet 22 on the bottom of the casing.

[0047] In this embodiment, a narrow rectangular space is formed between two adjacent metal heat exchange plates, between the metal heat exchange plate and the heat and mass transfer hollow fiber membrane plate, and between the metal heat exchange plate and the leak-proof unit sealing plate, and heat and medium exchange are generated with the adjacent fluid.

[0048] In this embodiment, each metal heat exchange plate is a heat exchange plate with metal corrugations to enhance heat exchange between the plates.

[0049] In this embodiment, each heat and mass transfer hollow fiber membrane is a polymer hydrophobic microporous membrane.

[0050] Example 2

[0051] refer to Figure 1 and Figure 2The absorption lithium bromide heat pump system based on an integrated generator-condenser provided in this embodiment includes: a cooling tower 25, an absorber 28, an evaporator 32, and a heat exchanger 39; a pipe 20 for the two-phase flow of water vapor on the casing is connected to the evaporator condensate inlet 31, the evaporator low-pressure steam outlet 35 is connected to the absorber low-pressure steam inlet 36, the circulating cooling water outlet 22 on the casing is connected to the absorber circulating cooling water inlet 29, and the absorber circulating cooling water outlet 27 is connected to the casing circulating cooling water inlet 21 via the cooling tower 25; the absorber lithium bromide dilute solution outlet 37 is connected to the heat exchanger lithium bromide dilute solution inlet 40, the heat exchanger lithium bromide dilute solution outlet 41 is connected to the casing lithium bromide dilute solution inlet 18, the casing lithium bromide concentrated solution outlet 19 is connected to the heat exchanger lithium bromide concentrated solution inlet 42, and the heat exchanger lithium bromide concentrated solution outlet 43 is connected to the absorber lithium bromide concentrated solution inlet 38.

[0052] In this embodiment, an expansion valve 30 is installed on the pipe connecting the port 20 of the two-phase flow of water vapor on the shell to the condensate inlet 31 of the evaporator.

[0053] In this embodiment, a circulating cooling water pump 26 is installed on the pipe connecting the absorber circulating cooling water outlet 27 to the cooling tower 25.

[0054] In this embodiment, the evaporator 32 is also provided with an evaporator chilled water inlet 33 and an evaporator chilled water outlet 34.

[0055] In this embodiment, during operation, it includes:

[0056] A dilute lithium bromide solution is pressurized by a pump from absorber 28, passes through heat exchanger 39, and enters the integrated composite generator-condenser 24. After being heated by the waste heat source, the dilute lithium bromide solution and the vapor condensate cooled by circulating cooling water on the other side of the heat and mass transfer hollow fiber membrane plate generate a vapor pressure difference. Through the membrane distillation effect, water vapor passes through the heat and mass transfer hollow fiber membrane plate to the other side. The lithium bromide solution is concentrated into a concentrated lithium bromide solution. The concentrated solution heats the opposite dilute lithium bromide solution through heat exchanger 39, and the cooled concentrated solution returns to absorber 28.

[0057] In this process, high-temperature steam is cooled into condensate by circulating cooling water. The condensate passes through expansion valve 30 and enters the extremely low-pressure evaporator 32, where it completes a working cycle with the chilled water system. The chilled water temperature is approximately 4°C, while the condensate in evaporator 32 is approximately 12°C. Heat is transferred between them through the pipe walls, causing the condensate to evaporate into gas under low pressure, carrying away a large amount of heat and completing the working process. All the evaporated condensate accumulates in the evaporator 32 chamber and is reintroduced into the near-vacuum absorber 28 for spraying, where it is rapidly mixed with the concentrated lithium bromide solution, becoming a dilute lithium bromide solution again for circulation.

[0058] The circulating cooling water that cools the steam in the integrated compound generator condenser 24 enters the cooling tower 25 for further cooling. It is then pumped into the absorber 28 to absorb the heat of reaction generated by the absorption of water molecules by the lithium bromide concentrated solution. The water then enters the integrated compound generator condenser 24 again to cool the steam, completing one cycle.

[0059] Compared to existing absorption lithium bromide heat pump technology, this invention adopts an integrated design, combining the generator and condenser into one device to form an integrated composite generator-condenser, thereby saving system layout space and improving the working efficiency of the lithium bromide heat pump.

[0060] Industrial waste heat serves as a high-temperature heat source to heat a dilute lithium bromide solution. The high temperature creates a vapor pressure difference between the dilute lithium bromide solution and water vapor on both sides of the hollow fiber membrane. Water vapor in the dilute lithium bromide solution passes through the porous hollow fiber membrane via membrane distillation. The water vapor transferred to the other side undergoes heat transfer with the circulating cooling water through a metal corrugated plate, condensing into condensate.

[0061] The condensate flows out of the integrated combined generator-condenser, where it undergoes heat transfer with chilled water in the vacuum evaporator. It then enters the absorber, where it is sprayed with a concentrated lithium bromide solution. The resulting diluted lithium bromide solution re-enters the integrated combined generator-condenser for circulation. The circulating cooling water for cooling the steam in the integrated combined generator-condenser passes through an air-cooled or other circulating water cooling system. Driven by a pump, it absorbs the heat generated by the concentrated lithium bromide spray in the absorber and re-enters the integrated combined generator-condenser for circulation.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A lithium bromide heat pump integrated composite generator-condenser based on a hollow fiber membrane, characterized in that, The integrated composite generator condenser (24) is composed of multiple basic functional units connected in series and parallel; Each basic functional unit includes a casing, and from left to right arranged inside the casing are the sixth metal heat exchange plate (8), the fourth metal heat exchange plate (6), the second heat and mass transfer hollow fiber membrane plate (4), the second metal heat exchange plate (2), the first metal heat exchange plate (1), the first heat and mass transfer hollow fiber membrane plate (3), the third metal heat exchange plate (5), and the fifth metal heat exchange plate (7); both ends of the casing are respectively provided with leak-proof unit sealing plates (23). The top of the shell is provided with a high-temperature waste heat medium inlet (16), a lithium bromide dilute solution inlet (18), and a circulating cooling water inlet (21), and the bottom is provided with a high-temperature waste heat medium outlet (17), a lithium bromide concentrated solution outlet (19), a water vapor two-phase flow port (20), and a circulating cooling water outlet (22). All metal heat exchange plates and all heat and mass transfer hollow fiber membrane plates have a high-temperature waste heat medium inlet (9), a lithium bromide dilute solution inlet (11), and a circulating cooling water inlet (14) at one end, and a high-temperature waste heat medium outlet (10), a circulating cooling water outlet (15), a water vapor two-phase flow port (13), and a lithium bromide concentrated solution outlet (12) at the other end. Waste heat source is introduced between the second metal heat exchange plate (2) and the first metal heat exchange plate (1). Lithium bromide dilute solution is introduced between the first metal heat exchange plate (1) and the first heat transfer hollow fiber membrane plate (3) and between the second metal heat exchange plate (2) and the second heat transfer hollow fiber membrane plate (4). Water vapor is introduced between the first heat transfer hollow fiber membrane plate (3) and the third metal heat exchange plate (5), between the second heat transfer hollow fiber membrane plate (4) and the fourth metal heat exchange plate (6), between the fifth metal heat exchange plate (7) and the corresponding leak-proof unit sealing plate (23), and between the sixth metal heat exchange plate (8) and the corresponding leak-proof unit sealing plate (23). Circulating cooling water is introduced between the third metal heat exchange plate (5) and the fifth metal heat exchange plate (7) and between the sixth metal heat exchange plate (8) and the fourth metal heat exchange plate (6).

2. The lithium bromide heat pump integrated composite generator-condenser based on hollow fiber membrane according to claim 1, characterized in that, The high-temperature waste heat medium inlet (16), the lithium bromide dilute solution inlet (18), and the circulating cooling water inlet (21) on the top of the shell are arranged diagonally with the high-temperature waste heat medium outlet (17), the lithium bromide concentrated solution outlet (19), the water vapor two-phase flow port (20), and the circulating cooling water outlet (22) on the bottom of the shell.

3. The lithium bromide heat pump integrated composite generator-condenser based on hollow fiber membrane according to claim 1, characterized in that, A narrow rectangular space is formed between two adjacent metal heat exchange plates, between a metal heat exchange plate and a heat and mass transfer hollow fiber membrane plate, and between a metal heat exchange plate and a leak-proof unit sealing plate.

4. The lithium bromide heat pump integrated composite generator-condenser based on hollow fiber membrane according to claim 1, characterized in that, Each metal heat exchange plate is a heat exchange plate with metal corrugations.

5. The lithium bromide heat pump integrated composite generator-condenser based on hollow fiber membrane according to claim 1, characterized in that, Each heat and mass transfer hollow fiber membrane is a high-molecular hydrophobic microporous membrane.

6. An absorption lithium bromide heat pump system based on an integrated generator-condenser, characterized in that, The system is based on the lithium bromide heat pump integrated composite generator condenser based on hollow fiber membrane according to any one of claims 1 to 5, comprising: a cooling tower (25), an absorber (28), an evaporator (32), and a heat exchanger (39). The port (20) of the two-phase flow of water vapor on the shell is connected to the condensate inlet (31) of the evaporator, the low-pressure steam outlet (35) of the evaporator is connected to the low-pressure steam inlet (36) of the absorber, the circulating cooling water outlet (22) on the shell is connected to the circulating cooling water inlet (29) of the absorber, and the circulating cooling water outlet (27) of the absorber is connected to the circulating cooling water inlet (21) on the shell through the cooling tower (25). The lithium bromide dilute solution outlet (37) of the absorber is connected to the lithium bromide dilute solution inlet (40) of the heat exchanger, the lithium bromide dilute solution outlet (41) of the heat exchanger is connected to the lithium bromide dilute solution inlet (18) on the shell, the lithium bromide concentrated solution outlet (19) on the shell is connected to the lithium bromide concentrated solution inlet (42) of the heat exchanger, and the lithium bromide concentrated solution outlet (43) of the heat exchanger is connected to the lithium bromide concentrated solution inlet (38) of the absorber.

7. The absorption lithium bromide heat pump system based on an integrated generator-condenser according to claim 6, characterized in that, An expansion valve (30) is installed on the pipe connecting the two-phase flow of water vapor on the shell to the condensate inlet (31) of the evaporator.

8. The absorption lithium bromide heat pump system based on an integrated generator-condenser according to claim 6, characterized in that, A circulating cooling water pump (26) is installed on the pipe connecting the absorber circulating cooling water outlet (27) to the cooling tower (25).

9. The absorption lithium bromide heat pump system based on an integrated generator-condenser according to claim 6, characterized in that, The evaporator (32) is also provided with an evaporator chilled water inlet (33) and an evaporator chilled water outlet (34).

10. The absorption lithium bromide heat pump system based on an integrated generator-condenser according to claim 9, characterized in that, The temperature of the chilled water is 4℃.

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