Adsorption type heat pump system directly driven by steam

Abstract

The utility model discloses an adsorption type heat pump system directly driven by steam. The adsorption type heat pump system comprises a first adsorption bed, a second adsorption bed, an evaporator, an ammonia circulation pipeline and a condenser, the first adsorption bed is communicated with the second adsorption bed through a throttling valve, and the other end of the first adsorption bed and the other end of the second adsorption bed are communicated with an ammonia circulation pipeline through a two-position four-way reversing valve to form an adsorption bed heat exchange fluid loop; the first adsorption bed is connected with the evaporator and the condenser through a vacuum valve; the second adsorption bed is connected with the evaporator and the condenser through a vacuum valve; the evaporator is connected with an external heat source, and the condenser is connected with the first cooling tower. According to the system, ammonia is used as a heat exchange medium of the adsorption bed, isothermal adsorption and desorption of the adsorption bed in the adsorption and desorption process are achieved through latent heat transfer of isothermal evaporation / condensation, the temperature gradient of the adsorbent in the working process is reduced, the heat transfer temperature difference is small, and the adsorption and desorption rate of the adsorbent and the operation stability of the system are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, and in particular to a steam-driven adsorption heat pump system. Background Technology

[0002] Industrial waste heat refers to the heat that can be released from the heat transfer fluid of the system under investigation, based on ambient temperature. Data shows that energy consumption in my country's industrial operations accounts for only about 33% of the total energy supply, and less than 55% of industrial waste heat is recovered and utilized. This results in a significant loss of low-grade heat energy (below 150℃) to the environment. The potential of this waste heat needs to be utilized to improve energy efficiency and reduce energy consumption. Adsorption heat pumps are heat energy conversion devices that operate on the principle of adsorption. They can utilize waste heat above 60℃, achieving cooling and heating functions through the adsorption and desorption of refrigerant by the adsorbent.

[0003] Adsorption heat pumps typically consist of an adsorption bed, refrigerant, evaporator, condenser, and piping and valves. Their operation involves adsorption refrigeration and desorption condensation. The advantages of adsorption heat pumps are that they do not require a mechanical compressor, resulting in quieter, more stable operation and lower maintenance costs. Furthermore, adsorption heat pumps can utilize low-grade heat sources such as solar and geothermal energy, thus exhibiting high energy efficiency. However, because the adsorbent material exhibits exothermic or endothermic phenomena during adsorption / desorption, and conventional adsorption heat pumps rely on sensible heat transfer, a significant temperature difference exists between the inlet and outlet of the adsorption bed during the adsorption and desorption processes. This prevents the adsorbent from maintaining a stable operating temperature, severely impacting the performance stability of the adsorption heat pump. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a steam-driven adsorption heat pump system.

[0005] This utility model is achieved through the following technical solution: a steam-driven adsorption heat pump system, comprising a first adsorption bed, a second adsorption bed, an evaporator, an ammonia circulation pipeline, and a condenser connected to the evaporator; the first adsorption bed and the second adsorption bed are connected by a throttling valve, and the other end of the first adsorption bed and the other end of the second adsorption bed are connected to the ammonia circulation pipeline through a two-position four-way reversing valve, forming an adsorption bed heat exchange fluid circuit; the refrigerant inlet of the first adsorption bed is connected to the first refrigerant outlet of the evaporator through a first vacuum valve, and the refrigerant outlet of the first adsorption bed is connected to the first refrigerant inlet of the condenser through a third vacuum valve; the refrigerant inlet of the second adsorption bed is connected to the second refrigerant outlet of the evaporator through a second vacuum valve, and the refrigerant outlet of the second adsorption bed is connected to the second refrigerant inlet of the condenser through a fourth vacuum valve; the evaporator is connected to an external heat source, and the condenser is connected to a first cooling tower; the pipeline between the refrigerant inlet and the refrigerant outlet of the adsorption bed is a heat exchange fluid pipeline.

[0006] This system achieves continuous switching of the adsorption / desorption process through the alternating operation of dual adsorption beds and the cooperation of a two-position four-way reversing valve, which significantly improves the operating efficiency of the heat pump system. The cooperation between the dual adsorption beds and the evaporator and condenser optimizes the heat exchange path, reduces energy loss, and improves the system's adaptability to steam-driven heat sources.

[0007] The adsorbent in the first and / or second adsorption beds is any one of silica gel, zeolite, or activated carbon, which enhances the adsorption / desorption performance of the adsorption beds for ammonia, expands the system's compatibility with heat sources of different temperatures, and improves the energy efficiency ratio and operational stability.

[0008] The throttling valve is a double one-way throttling valve. The design of the double one-way throttling valve can ensure the bidirectional controllable flow of the heat exchange fluid between the two adsorption beds, effectively balance the pressure difference between the two adsorption beds, avoid system fluctuations caused by sudden pressure changes, and ensure circulation stability.

[0009] The ammonia circulation pipeline includes an ammonia storage tank, a heat recovery device, a heat exchanger, a second cooling tower, a first circulation pump, and a second circulation pump. The outlet of the ammonia storage tank is connected to the heat recovery device via the first circulation pump. The heat recovery device is connected to the first port of a two-position four-way reversing valve. The fourth port of the two-position four-way reversing valve is connected to the first inlet of the heat exchanger. The first outlet of the heat exchanger is connected to the ammonia storage tank. The outlet of the second cooling tower is connected to the second inlet of the heat exchanger via the second circulation pump. The second outlet of the heat exchanger is connected to the... The inlet of the second cooling tower is connected; the ammonia interface of the first adsorption bed is connected to the second interface of the two-position four-way reversing valve, and the third interface of the two-position four-way reversing valve is connected to the ammonia interface of the second adsorption bed; the two-position four-way reversing valve has two operating modes: in the first operating mode, the first and third interfaces of the two-position four-way reversing valve are connected, and the second and fourth interfaces are connected; in the second operating mode, the first and second interfaces of the two-position four-way reversing valve are connected, and the third and fourth interfaces are connected. Through the synergistic effect of the ammonia storage tank, heat recovery device, and heat exchanger, the waste heat recovery and reliquefaction cycle of ammonia vapor are realized, significantly improving energy utilization. The dual-mode switching of the two-position four-way reversing valve simplifies the pipeline structure, reduces control complexity, and reduces energy transfer losses.

[0010] The internal pressure of the heat exchange fluid pipeline and the ammonia circulation pipeline of the adsorption bed is 0.2-5MPa, which optimizes the heat transfer efficiency and ammonia circulation rate of the adsorption bed and avoids the risk of leakage caused by high pressure or performance degradation under low pressure.

[0011] The heat exchange fluid pipelines and ammonia circulation pipelines of the adsorption bed are all made of materials resistant to ammonia water and ammonia vapor corrosion, which can significantly extend the pipeline life, reduce maintenance costs caused by corrosion, and ensure sealing and reliability under high temperature and high pressure conditions.

[0012] The heat exchange fluid pipelines of the adsorption bed and the ammonia circulation pipelines are all made of 304 stainless steel, which has the advantages of corrosion resistance, high strength and cost, and is suitable for the harsh working conditions of ammonia circulation, ensuring long-term stable operation of the system.

[0013] The heat recovery device uses external waste heat to heat and vaporize the liquid ammonia delivered by the first circulation pump, producing ammonia vapor at 50-80°C, which reduces system energy consumption and achieves efficient utilization of low-grade waste heat.

[0014] The second refrigerant inlet of the evaporator is connected to the outlet of the external heat source via a fifth vacuum valve and a fourth circulating pump, and the second refrigerant outlet of the evaporator is connected to the inlet of the external heat source via a sixth vacuum valve. The second refrigerant inlet of the condenser is connected to the outlet of the first cooling tower via a seventh vacuum valve and a third circulating pump, and the second refrigerant outlet of the condenser is connected to the inlet of the first cooling tower via an eighth vacuum valve. Through precise control of multiple sets of vacuum valves and circulating pumps, flexible connections between the evaporator and condenser and the external heat source / cooling tower are achieved, improving the system's response to dynamic loads and reducing mixing losses of hot and cold media.

[0015] The heat recovery device is connected to the first port of the two-position four-way reversing valve via the ninth vacuum valve. The first outlet of the heat exchanger is connected to the ammonia storage tank via the tenth vacuum valve, and the second outlet of the heat exchanger is connected to the inlet of the second cooling tower via the eleventh vacuum valve. This system configuration further enhances the sealing of the ammonia circulation pipeline and the heat exchange fluid pipeline, preventing ammonia leakage and the intrusion of external impurities, and ensuring the safe operation of the system under complex operating conditions.

[0016] Compared with existing technologies, the advantages of this invention are as follows: This system utilizes ammonia as the heat exchange medium of the adsorption bed, and through direct steam drive, it achieves isothermal adsorption and desorption during the adsorption-desorption process, effectively avoiding the temperature difference caused by sensible heat transfer, reducing the temperature gradient of the adsorbent during operation, and improving the operational stability of the chemical heat pump. Ammonia, as a heat exchange medium, has a high condensation or evaporation heat transfer coefficient and a small temperature difference during operation, which can effectively improve the adsorption-desorption rate of the adsorbent and enhance the overall performance of the adsorption heat pump. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the pipeline connection structure when the two-position four-way reversing valve of this utility model is in the first working mode;

[0019] Figure 3 This is a schematic diagram of the pipeline connection structure when the two-position four-way reversing valve of this utility model is in the second working mode.

[0020] The following are the meanings of the labels in the attached diagram: 1. Throttling valve; 2. Two-position four-way reversing valve; 3. Heat exchanger; 4. Heat recovery device; 51. First circulating pump; 52. Second circulating pump; 53. Third circulating pump; 54. Fourth circulating pump; 6. Ammonia storage tank; 71. Second cooling tower; 72. First cooling tower; 81. First vacuum valve; 82. Second vacuum valve; 83. Third vacuum valve; 84. Fourth vacuum valve; 9. Second adsorption bed; 10. First adsorption bed; 11. Condenser; 12. Evaporator; 13. External heat source. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Example

[0023] See Figures 1 to 3 This is a steam-driven adsorption heat pump system, comprising a first adsorption bed 10, a second adsorption bed 9, an evaporator 12, an ammonia circulation pipeline, and a condenser 11 connected to the evaporator 12 (in this embodiment, the condenser 11 is connected to the evaporator 12 via pipes and valves, as shown in the figure); the first adsorption bed 10 and the second adsorption bed 9 are connected by a throttling valve 1, and the other end of the first adsorption bed 10 and the other end of the second adsorption bed 9 are connected to the ammonia circulation pipeline via a two-position four-way reversing valve 2, forming an adsorption bed heat exchange fluid loop; the refrigerant inlet of the first adsorption bed 10 is connected to a first vacuum valve 81. The first adsorption bed 10 is connected to the first refrigerant outlet of the evaporator 12, and the refrigerant outlet of the first adsorption bed 10 is connected to the first refrigerant inlet of the condenser 11 via a third vacuum valve 83. The refrigerant inlet of the second adsorption bed 9 is connected to the second refrigerant outlet of the evaporator 12 via a second vacuum valve 82, and the refrigerant outlet of the second adsorption bed 9 is connected to the second refrigerant inlet of the condenser 11 via a fourth vacuum valve 84. The evaporator 12 is connected to an external heat source 13, and the condenser 11 is connected to a first cooling tower 72. The pipe between the refrigerant inlet and the refrigerant outlet of the adsorption bed is a heat exchange fluid pipe. Adsorption and desorption processes alternately occur in the first adsorption bed 10 and the second adsorption bed 9.

[0024] This system achieves continuous switching of the adsorption / desorption process through the alternating operation of the dual adsorption beds and the cooperation of the two-position four-way reversing valve 2, which significantly improves the operating efficiency of the heat pump system. The cooperation between the dual adsorption beds and the evaporator 12 and condenser 11 optimizes the heat exchange path, reduces energy loss, and improves the system's adaptability to steam-driven heat sources.

[0025] The adsorbent in the first adsorption bed 10 and / or the second adsorption bed 9 is any one of silica gel, zeolite, or activated carbon, and the adsorbate is water. This enhances the adsorption / desorption performance of the adsorption bed for ammonia, expands the system's compatibility with heat sources of different temperatures, and improves the energy efficiency ratio and operational stability.

[0026] Throttling valve 1 is a double one-way throttling valve 1. The design of the double one-way throttling valve 1 can ensure bidirectional controllable flow of the heat exchange fluid between the two adsorption beds, effectively balance the pressure difference between the two adsorption beds, avoid system fluctuations caused by sudden pressure changes, and ensure circulation stability. The fluid can expand and depressurize bidirectionally between the first adsorption bed 10 and the second adsorption bed 9 through the double one-way throttling valve 1.

[0027] The ammonia circulation pipeline includes an ammonia storage tank 6, a heat recovery device 4, a heat exchanger 3, a second cooling tower 71, a first circulation pump 51, and a second circulation pump 52. The outlet of the ammonia storage tank 6 is connected to the heat recovery device 4 via the first circulation pump 51. The heat recovery device 4 is connected to the first port of a two-position four-way reversing valve 2. The fourth port of the two-position four-way reversing valve 2 is connected to the first inlet of the heat exchanger 3. The first outlet of the heat exchanger 3 is connected to the ammonia storage tank 6. The outlet of the second cooling tower 71 is connected to the second inlet of the heat exchanger 3 via the second circulation pump 52. The second outlet of the heat exchanger 3 is connected to the second cooling tower 71. The inlet of adsorption tower 71 is connected; the ammonia interface of the first adsorption bed 10 is connected to the second interface of the two-position four-way reversing valve 2, and the third interface of the two-position four-way reversing valve 2 is connected to the ammonia interface of the second adsorption bed 9; the two-position four-way reversing valve 2 has two working modes: in the first working mode, the first interface and the third interface of the two-position four-way reversing valve 2 are connected, and the second interface and the fourth interface are connected; in the second working mode, the first interface and the second interface of the two-position four-way reversing valve 2 are connected, and the third interface and the fourth interface are connected. Through the synergistic action of the ammonia storage tank 6, the heat recovery device 4, and the heat exchanger 3, the waste heat recovery and reliquefaction cycle of ammonia vapor are realized, significantly improving energy utilization. The dual-mode switching of the two-position four-way reversing valve 2 simplifies the pipeline structure, reduces control complexity, and reduces energy transfer loss. The heat source provided by the heat recovery equipment heats the liquid ammonia through the heat exchange tubes to evaporate it into gaseous ammonia (50-80℃). Heat exchanger 3 is connected to ammonia storage tank 6 to form a loop. Heat exchanger 3 is externally connected to a second cooling tower 71, which is used to condense and liquefy gaseous ammonia.

[0028] The internal pressure of the heat exchange fluid pipeline and the ammonia circulation pipeline of the adsorption bed is 0.2-5 Pa, which optimizes the heat transfer efficiency and ammonia circulation rate of the adsorption bed and avoids the risk of leakage caused by high pressure or performance degradation under low pressure.

[0029] The heat exchange fluid pipelines and ammonia circulation pipelines of the adsorption bed are all made of materials resistant to ammonia water and ammonia vapor corrosion, which can significantly extend the pipeline life, reduce maintenance costs caused by corrosion, and ensure sealing and reliability under high temperature and high pressure conditions.

[0030] The heat exchange fluid pipelines of the adsorption bed and the ammonia circulation pipelines are all made of 304 stainless steel, which has the advantages of corrosion resistance, high strength and cost, and is suitable for the harsh working conditions of ammonia circulation, ensuring long-term stable operation of the system.

[0031] The heat recovery device 4 uses external waste heat to heat up and vaporize the liquid ammonia delivered by the first circulation pump 51, generating ammonia vapor at 50-80°C, which reduces system energy consumption and achieves efficient utilization of low-grade waste heat.

[0032] The second refrigerant inlet of evaporator 12 is connected to the outlet of external heat source 13 via the fifth vacuum valve and the fourth circulation pump 54. The second refrigerant outlet of evaporator 12 is connected to the inlet of external heat source 13 via the sixth vacuum valve. The refrigerant in evaporator 12 evaporates and absorbs heat, providing cooling capacity to the outside environment. The second refrigerant inlet of condenser 11 is connected to the outlet of first cooling tower 72 via the seventh vacuum valve and the third circulation pump 53. The second refrigerant outlet of condenser 11 is connected to the inlet of first cooling tower 72 via the eighth vacuum valve. The refrigerant condenses and liquefies through heat dissipation from first cooling tower 72, and the liquid refrigerant is ultimately returned to evaporator 12, achieving a closed-loop refrigerant circulation. Through precise control of multiple sets of vacuum valves and circulation pumps, flexible connections between evaporator 12 and condenser 11 and external heat source 13 / cooling tower are achieved, improving the system's response to dynamic loads and reducing mixing losses of hot and cold media. In this embodiment, the refrigerant is evaporated into gas through the evaporator 12, enters the adsorption bed and is adsorbed by the adsorption material. After the adsorption is saturated, the adsorption material is heated, and the refrigerant is desorbed and enters the condenser 11 to condense into liquid. The liquid refrigerant flows back into the evaporator 12 through the connecting pipe and valve between the condenser 11 and the evaporator 12, thereby realizing a closed loop.

[0033] The heat recovery device 4 is connected to the first port of the two-position four-way reversing valve 2 via the ninth vacuum valve. The first outlet of the heat exchanger 3 is connected to the ammonia storage tank 6 via the tenth vacuum valve, and the second outlet of the heat exchanger 3 is connected to the inlet of the second cooling tower 71 via the eleventh vacuum valve. This system setup further enhances the sealing of the ammonia circulation pipeline and the heat exchange fluid pipeline, preventing ammonia leakage and the intrusion of external impurities, ensuring the safe operation of the system under complex working conditions. The heat recovery device 4 evaporates liquid ammonia, providing high-temperature ammonia vapor as a driving heat source for adsorbent desorption. During desorption, the ammonia vapor isothermally condenses. The high-temperature liquid ammonia is depressurized and expanded by the throttle valve 1, forming low-temperature liquid ammonia for heat exchange in the adsorption bed process. After recovering the adsorption heat, the low-temperature liquid ammonia isothermally evaporates, and the resulting low-temperature gaseous ammonia condenses at room temperature to form liquid, thus achieving circulation.

[0034] The adsorption and desorption processes alternate within the first adsorption bed 10 and the second adsorption bed 9, including the following steps:

[0035] The liquid ammonia in the ammonia storage tank 6 is fed into the heat recovery equipment by the first circulation pump 51 to heat up and vaporize, generating ammonia vapor at 50-80℃. This vapor then enters the second adsorption bed 9 through the two-position four-way reversing valve 2, causing the adsorbent to desorb. The fourth vacuum valve connecting the second adsorption bed 9 to the condenser 11 is opened, allowing the refrigerant to enter the condenser 11 for condensation. During the desorption process, the adsorbent absorbs heat, causing the ammonia vapor to condense isothermally, thus achieving isothermal desorption in the second adsorption bed 9. The liquefied liquid ammonia is still at a high temperature (50-80℃). It is depressurized and cooled to 30-35℃ by the throttle valve 1, and then enters the first adsorption bed 10. The first vacuum valve 81 connecting the first adsorption bed 10 to the evaporator 12 is opened, allowing the refrigerant to enter the first adsorption bed 10 from the evaporator 12 to begin the adsorption process. The heat generated during the adsorption process causes the liquid ammonia (30-35℃) to evaporate isothermally, thus achieving isothermal desorption. The evaporated gaseous ammonia (30-35℃) enters the heat exchanger (3) through a two-position four-way reversing valve (2) and is cooled to room temperature (25-30℃).

[0036] Liquid ammonia (25-30℃) enters the ammonia storage tank 6 to form a closed loop. After the adsorption and desorption processes of the first adsorption bed 10 and the second adsorption bed 9 are completed, the vacuum valve and the two-position four-way reversing valve 2 are switched. That is, the first vacuum valve 81 and the fourth vacuum valve 84 are closed, and the second vacuum valve 82 and the third vacuum valve 83 are opened. The working state of the two-position four-way reversing valve 2 is switched so that high-temperature ammonia vapor enters the first adsorption bed 10 for desorption. The above process is repeated to realize that the first adsorption bed 10 and the second adsorption bed 9 alternately carry out the adsorption and desorption processes.

[0037] In this embodiment, the adsorption bed is not limited to two sets; multiple sets of adsorption beds can be used in combination to achieve continuous heat storage and cooling. In this embodiment, the adsorption bed, evaporator 12, heat recovery device 4, condenser 11, and cooling tower are all existing mature equipment, and there is no need to conduct specific structural analysis.

[0038] In the operation of this embodiment, 1) in the evaporation-adsorption process: the refrigerant evaporates into a gaseous refrigerant and enters the adsorption bed for adsorption, and the evaporator 12 is used to provide cooling to the outside; 2) in the desorption-condensation process: the adsorption bed is heated, the gaseous refrigerant is desorbed from the adsorption bed and enters the condenser 11 for condensation, and waste heat and other low-grade heat sources are used as driving heat sources.

[0039] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. A vapour direct-driven adsorption heat pump system, characterised in that: The system includes a first adsorption bed, a second adsorption bed, an evaporator, an ammonia circulation pipeline, and a condenser connected to the evaporator. The first and second adsorption beds are connected by a throttling valve, and the other ends of the first and second adsorption beds are connected to the ammonia circulation pipeline via a two-position four-way reversing valve, forming an adsorption bed heat exchange fluid loop. The refrigerant inlet of the first adsorption bed is connected to the first refrigerant outlet of the evaporator via a first vacuum valve, and the refrigerant outlet of the first adsorption bed is connected to the first refrigerant inlet of the condenser via a third vacuum valve. The refrigerant inlet of the second adsorption bed is connected to the second refrigerant outlet of the evaporator via a second vacuum valve, and the refrigerant outlet of the second adsorption bed is connected to the second refrigerant inlet of the condenser via a fourth vacuum valve. The evaporator is connected to an external heat source, and the condenser is connected to a first cooling tower. The pipeline between the refrigerant inlet and the refrigerant outlet of the adsorption bed is a heat exchange fluid pipeline.

2. The vapor directly driven adsorption heat pump system of claim 1, wherein: The adsorbent for the first adsorption bed and / or the second adsorption bed is any one of silica gel, zeolite, or activated carbon.

3. The vapor direct drive adsorption heat pump system of claim 1, wherein: The throttle valve is a dual one-way throttle valve.

4. The vapor direct-driven adsorption heat pump system of claim 1, wherein: The ammonia circulation pipeline includes an ammonia storage tank, a heat recovery device, a heat exchanger, a second cooling tower, a first circulation pump, and a second circulation pump. The outlet of the ammonia storage tank is connected to the heat recovery device via the first circulation pump. The heat recovery device is connected to the first port of a two-position four-way reversing valve. The fourth port of the two-position four-way reversing valve is connected to the first inlet of the heat exchanger. The first outlet of the heat exchanger is connected to the ammonia storage tank. The outlet of the second cooling tower is connected to the second inlet of the heat exchanger via the second circulation pump. The second outlet of the heat exchanger is connected to the... The inlet of the second cooling tower is connected; the ammonia interface of the first adsorption bed is connected to the second interface of the two-position four-way reversing valve, and the third interface of the two-position four-way reversing valve is connected to the ammonia interface of the second adsorption bed; the two-position four-way reversing valve has two working modes: in the first working mode, the first interface and the third interface of the two-position four-way reversing valve are connected, and the second interface and the fourth interface of the two-position four-way reversing valve are connected; in the second working mode, the first interface and the second interface of the two-position four-way reversing valve are connected, and the third interface and the fourth interface of the two-position four-way reversing valve are connected.

5. The vapor direct drive adsorption heat pump system of claim 1, wherein: The internal pressure of the heat exchange fluid pipeline and the ammonia circulation pipeline of the adsorption bed is 0.2-5 MPa.

6. The vapor direct drive adsorption heat pump system of claim 1, wherein: The heat exchange fluid pipelines and ammonia circulation pipelines of the adsorption bed are all made of materials resistant to ammonia water and ammonia vapor corrosion.

7. The vapor direct drive adsorption heat pump system of claim 1, wherein: The heat exchange fluid pipelines and ammonia circulation pipelines of the adsorption bed are all made of 304 stainless steel.

8. The vapor directly driven adsorption heat pump system of claim 4, wherein: The heat recovery device uses external waste heat to heat and vaporize the liquid ammonia delivered by the first circulation pump, producing ammonia vapor at 50-80°C.

9. The steam-driven adsorption heat pump system according to claim 1, characterized in that: The second refrigerant inlet of the evaporator is connected to the outlet of the external heat source through the fifth vacuum valve and the fourth circulation pump, and the second refrigerant outlet of the evaporator is connected to the inlet of the external heat source through the sixth vacuum valve; the second refrigerant inlet of the condenser is connected to the outlet of the first cooling tower through the seventh vacuum valve and the third circulation pump, and the second refrigerant outlet of the condenser is connected to the inlet of the first cooling tower through the eighth vacuum valve.

10. The steam-driven adsorption heat pump system according to claim 1, characterized in that: The heat recovery device is connected to the first port of the two-position four-way reversing valve through the ninth vacuum valve, the first outlet of the heat exchanger is connected to the ammonia storage tank through the tenth vacuum valve, and the second outlet of the heat exchanger is connected to the inlet of the second cooling tower through the eleventh vacuum valve.

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