Separated absorption heat pump

Abstract

The utility model provides a separation type absorption heat pump, which comprises an evaporation part and an absorption part which are arranged in a closed container and are separated by a separation plate to be distributed left and right, and further comprises an external refrigerant storage tank, an external absorbent concentrated solution storage tank and an external absorbent dilute solution storage tank, semiconductor chilling plates extending into the left side and the right side are embedded in the isolation plate, a steam channel communicating the left side and the right side is formed in the upper portion of the isolation plate, the evaporation part and the absorption part are in a high-vacuum state, the evaporation part is externally connected with a low-temperature heat source, the absorption part is externally connected with a high-temperature heat source, and a proper amount of refrigerant liquid and absorbent which circularly flow are stored in the evaporation part and the absorption part respectively. The evaporation part absorbs heat from a low-temperature heat source through refrigerant liquid evaporation, an absorbent in the absorption part absorbs steam to trigger continuous evaporation of the refrigerant liquid, and absorption heat generated by the absorption part is conveyed to a high-temperature heat source. The separation type absorption heat pump is simple in structure and low in driving energy consumption, and has efficient refrigerating and heating performance. The device is simple in structure and low in driving energy consumption, has efficient refrigerating and heating performance, and is an effective device for recycling low-temperature-level heat energy.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy application, and specifically relates to a separation type absorption heat pump. Background Art

[0002] Absorption heat pump is a circulation system that utilizes low-grade heat source and the absorption characteristics of solution to pump heat from low-temperature heat source to high-temperature heat source. It is an effective device for recycling low-temperature heat energy, and has the dual functions of saving energy and protecting the environment. Absorption heat pump works by utilizing the gas-liquid equilibrium characteristics of a solution composed of two substances with different boiling points (often called a working fluid pair). Traditional absorption heat pumps are composed of main components such as regenerator, condenser, evaporator, absorber and heat exchanger, as well as auxiliary parts such as vacuum device, solution pump and refrigerant pump.

[0003] Absorption heat pumps can be used for both cooling and heating, and low-level heat energy has been well utilized. Therefore, they have been widely valued and used in recent years, and will be a dominant method for cooling and heating in the future. Especially in areas with tight electricity and rich waste heat geothermal resources, it has unique advantages. Therefore, how to make full use of energy and improve the cooling and heating effects of absorption heat pumps is a topic that technicians in the field are committed to research and development. The traditional absorption heat pump consists of 4 parts: a) Regenerator: Through external energy input, the absorbent (concentrated solution, liquid) and the refrigerant (water, gas) are separated; b) Condenser: The refrigerant separated by the regenerator is cooled (water) and becomes liquid; c) Evaporation section: The refrigerant is evaporated again and absorbs the surrounding heat (cooling); d) Absorption section: The concentrated solution is used to absorb the gaseous refrigerant to obtain condensation heat (heating), while maintaining the negative pressure state of the evaporation section, so that the whole process can be circulated.

[0004] The problem with traditional absorption heat pumps is that in the process of outputting cold (evaporation part) and heat (absorption part) of the entire system, the regenerator (also called generator) must continuously consume external energy to separate the absorbent (concentrated solution) and the refrigerant (gaseous state, such as water vapor), and the condenser then condenses the refrigerant (water vapor) into liquid (water). Once the external energy input to the regenerator stops, the entire cooling and heating process will also stop. Therefore, traditional absorption heat pumps are not suitable for various application scenarios characterized by low-grade energy and discontinuous supply, such as wind and solar drive, waste heat utilization, and various occasions that require cross-seasonal energy storage. Utility Model Content

[0005] In view of the existing technology, the purpose of the utility model is to provide a separate absorption heat pump with a streamlined structure, low driving energy consumption, and efficient cooling and heating performance. It can achieve continuous cooling and heating without relying on a regenerator and a condenser, has strong applicability, and is an effective device for recovering and utilizing low-temperature thermal energy.

[0006] To achieve the above object, the utility model adopts the following technical solution: The utility model provides a separated absorption heat pump, including an evaporation part and an absorption part which are centrally arranged in a closed container and separated by a partition plate and distributed on the left and right, and also includes an external refrigerant storage tank, an absorbent concentrated solution storage tank, and an absorbent dilute solution storage tank;

[0007] The isolation plate is embedded with semiconductor cooling sheets extending into the left and right sides, and the semiconductor cooling sheets are connected to an external power supply to transfer the heat in the evaporation part to the absorption part; a steam channel connecting the evaporation part and the absorption part is provided on the upper part of the isolation plate, a steam control valve is provided on the steam channel, a vacuum pump and a negative pressure control valve are provided above the evaporation part and the absorption part, respectively, the evaporation part and the absorption part are in a high vacuum state and the evaporation pressure in the evaporation part is kept constant;

[0008] The evaporator is provided with a first liquid distributor and a first heat exchanger distributed up and down, and the first heat exchanger is externally connected to a low-temperature heat source; the bottom discharge port of the evaporator is sequentially connected to the refrigerant circulation pump and the first liquid distributor pipeline; the refrigerant storage tank conveys refrigerant liquid to the evaporator through the refrigerant circulation pump and the first liquid distributor which are sequentially connected to the refrigerant storage tank through the refrigerant circulation pump and the first liquid distributor which are sequentially connected to the refrigerant storage tank through the pipeline; after a proper amount of refrigerant liquid is stored in the evaporator, the refrigerant circulation pump continuously sucks out the refrigerant liquid in the evaporator and conveys it back to the first liquid distributor; the refrigerant liquid circulates in the evaporator and contacts with the first heat exchanger for heat exchange; the refrigerant liquid absorbs heat and evaporates, and the generated refrigerant vapor flows into the absorption part through the steam channel;

[0009] The absorption section is provided with a second liquid distributor and a second heat exchanger distributed up and down. The second heat exchanger is externally connected to a high-temperature heat source. The bottom discharge port of the absorption section is connected to the solution circulation pump and the second liquid distributor pipeline in sequence. The absorbent concentrated solution in the absorbent concentrated solution storage tank is transported to the second liquid distributor by the solution circulation pump. After an appropriate amount of absorbent concentrated solution is stored in the absorption section, the solution circulation pump continuously sucks out the absorbent concentrated solution in the absorption section and transports it back to the second liquid distributor. The absorbent concentrated solution circulates in the absorption section and is in full contact with the refrigerant vapor and the second heat exchanger. The absorbent concentrated solution absorbs the refrigerant vapor, and the generated negative pressure causes the refrigerant liquid in the evaporation section to continuously evaporate and absorb heat from the low-temperature heat source. The generated absorption heat is transported to the high-temperature heat source via the second heat exchanger, and the generated absorbent dilute solution is discharged to the absorbent dilute solution storage tank via the dilute solution outlet of the absorption section.

[0010] The utility model provides a separate absorption heat pump, which also includes a regenerator, or a regenerator and a condenser; the regenerator is externally connected to a driving energy source, the liquid inlet of the regenerator is connected to the dilute solution outlet of the absorption part and the absorbent dilute solution storage tank through pipelines, the liquid discharge port of the regenerator is connected to the absorbent concentrated solution storage tank through a pipeline, the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped into the regenerator, and the absorbent concentrated solution is generated after regeneration treatment, and the absorbent concentrated solution generated in the regenerator is transported to the absorbent concentrated solution storage tank through a pipeline for storage.

[0011] The regenerator is a solution heating device, which is composed of a container with an inlet, a discharge port and an exhaust port and a heating component; the exhaust port of the solution heating device is provided with a one-way valve to communicate with the atmosphere, or the exhaust port is connected to a condenser and a refrigerant storage tank in sequence through a pipeline; the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped into the solution heating device, and after heating, an absorbent concentrated solution and refrigerant vapor are generated, and the generated absorbent concentrated solution is transported to the absorbent concentrated solution storage tank through a pipeline, and the generated refrigerant vapor is discharged into the air through the exhaust port, or transported to the condenser through a pipeline, condensed into liquid and then transported to the refrigerant storage tank.

[0012] The regenerator is an electrodialysis device, the absorption part or the absorbent dilute solution storage tank is connected to the electrodialysis device through a pipeline, the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped into the electrodialysis device, and the absorbent concentrated solution generated after electrodialysis treatment is transported to the absorbent concentrated solution storage tank through a pipeline.

[0013] The regenerator is a reverse osmosis membrane device, the absorption part or the absorbent dilute solution storage tank is connected to the reverse osmosis membrane device through a pipeline, the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped to the reverse osmosis membrane device, and the absorbent concentrated solution generated after reverse osmosis treatment is transported to the absorbent concentrated solution storage tank through a pipeline.

[0014] The above-mentioned solution heating device, electrodialysis device, and reverse osmosis membrane device are different types of solution regenerators, and the regenerator type can be adaptively selected according to factors such as the difference in boiling points of the refrigerant and the absorbent, the difference in molecular weight, the refrigerant recovery value, and the regeneration energy consumption.

[0015] The utility model provides a separation type absorption heat pump, wherein the absorbent dilute solution storage tank is connected to a chemical regeneration system, the absorbent dilute solution in the absorbent dilute solution storage tank is transported to the chemical regeneration system to participate in a chemical reaction, and after chemical treatment, an absorbent concentrated solution is generated, which is then transported to the absorbent concentrated solution storage tank.

[0016] The dilute solution outlet of the absorption part is arranged on the side of the absorption part, one end of the dilute solution outlet of the absorption part is connected to the built-in suction nozzle, and the other end is connected to the absorbent dilute solution storage tank through a discharge pump and a dilute solution discharge pipe. The suction nozzle floats on the liquid surface in the absorption part, and the absorbent dilute solution generated in the absorption part is sucked out by the suction nozzle and pumped to the absorbent dilute solution storage tank.

[0017] A liquid level sensor is provided in the evaporation part, and a concentration and liquid level sensor is provided in the absorption part. The above sensors are connected to the control module, and the control module automatically controls the addition of refrigerant liquid to the evaporation part, the addition of absorbent concentrated solution to the absorption part, or the discharge of the absorbent dilute solution in the absorption part.

[0018] The semiconductor refrigeration sheet extending into the absorption part and the evaporation part is covered with an anti-corrosion coating. The semiconductor refrigeration sheet is connected to an external power supply. When the semiconductor refrigeration sheet is powered on, the evaporation part transfers heat to the absorption part, further enhancing the cooling effect of the evaporation part and the heating effect of the absorption part.

[0019] The liquid inlet and outlet of the first heat exchanger are respectively connected to the cold medium circulation pipeline, and the cold medium circulation pipeline is connected to the low-temperature heat source. The cold medium flowing in the first heat exchanger and the cold medium circulation pipeline transfers the heat of the low-temperature heat source to the evaporation part, and at the same time outputs the cold energy obtained after heat exchange in the evaporation part to the outside of the evaporation part.

[0020] The liquid inlet and outlet of the second heat exchanger are respectively connected to the heat medium circulation pipeline, the heat medium circulation pipeline is connected to the high-temperature heat source, and the heat medium flowing in the second heat exchanger and the heat medium circulation pipeline transfers the heat absorbed in the absorption part to the high-temperature heat source.

[0021] The steam channel and the steam control valve are both made of anti-corrosion plastics. The steam control valve is opened to allow refrigerant steam to flow between the evaporation part and the absorption part. When the pressure on both sides reaches equilibrium, the steam control valve is closed to cut off the steam flow between the evaporation part and the absorption part.

[0022] The refrigerant liquid is preferably pure water, and may also be any low-boiling point liquid that is easily absorbed by the absorbent under normal pressure or low pressure.

[0023] The absorbent concentrated solution is a solution with strong absorption capacity, such as lithium bromide, lithium chloride, lithium iodide, calcium chloride solution and similar salt solutions, or a mixed solution composed of two or more of the above solutions.

[0024] The utility model discloses a separation-type absorption heat pump, which is mainly composed of an evaporation part and an absorption part which are concentrated in a closed container and separated by an isolation plate. A first heat exchanger is arranged in the evaporation part to connect to a low-temperature heat source, and a second heat exchanger is arranged in the absorption part to connect to a high-temperature heat source. The application uses the absorption of refrigerant vapor by an absorbent concentrated solution in the absorption part as a driving force. The absorbent concentrated solution absorbs the refrigerant vapor, and the negative pressure formed causes the refrigerant liquid in the evaporation part to evaporate. The evaporation part continuously absorbs heat from the low-temperature heat source through the evaporation of the refrigerant liquid, and the absorption part continuously releases the absorption heat by absorbing the refrigerant vapor through the absorbent concentrated solution and transports it to the high-temperature heat source, thereby realizing the purpose of transporting the heat of the low-temperature heat source to the high-temperature heat source.

[0025] In this utility model, the separated absorption heat pump absorbs heat when the refrigerant liquid evaporates, causing the temperature in the evaporation part to drop, and the absorbent solution absorbs steam, causing the temperature in the absorption part to rise. In the process of refrigerant liquid evaporation and steam absorption, two forms of heat energy, cold and hot, are generated, that is, cooling in the evaporation part and heating in the absorption part, so that the device has both cooling and heating performance. The isolation plate is embedded with a semiconductor cooling sheet, and when the semiconductor cooling sheet is powered on, the heat on both sides of the partition is transferred to enhance the cooling / heating effect.

[0026] The utility model is a separate absorption heat pump which can realize continuous cooling and heating without relying on a regenerator and a condenser, reduces the driving energy consumption of the absorption heat pump, has a simple structure, has efficient cooling and heating performance, can be flexibly used in different places, and is an effective device for recycling and utilizing low-temperature thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Description of reference numerals:

[0029] 1. Cold medium circulation pipeline 2. First heat exchanger 3. Refrigerant storage tank 7. Refrigerant circulation pump

[0030] 8. Refrigerant internal circulation pipe 9. First liquid distributor 10. Refrigerant liquid replenishment pipe

[0031] 4. Heat medium circulation pipeline 5. Second heat exchanger 12. Solution circulation pump 13. Solution internal circulation pipe

[0032] 14. Second liquid distributor 15. Absorbent replenishing pipe 16. Absorbent concentrated solution storage tank

[0033] 17. Drain pipe for dilute solution 18. Suction nozzle 19. Absorbent dilute solution storage tank

[0034] 20. Steam channel 21. Steam control valve 22. Negative pressure control valve 23. Vacuum pump 24. Semiconductor cooling sheet

[0035] A absorption part B evaporation part C isolation plate. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. When describing the product structure, the present invention uses terms such as "upper" and "lower" to indicate the orientation. The terms indicating the orientation are only used to indicate the relative position relationship between different components, and do not limit the orientation of the components of the present invention, nor do they limit the installation and use direction of the product. Example 1

[0037] like Figure 1 As shown, the utility model provides a separated absorption heat pump, including an evaporation part B and an absorption part A which are centrally arranged in a closed container and separated by an isolation plate C and distributed on the left and right, and also includes an external refrigerant storage tank 3, an absorbent concentrated solution storage tank 16, and an absorbent dilute solution storage tank 19;

[0038] The isolation plate C is embedded with a semiconductor cooling sheet 24 connected to an external power supply, and the semiconductor cooling sheet 24 penetrates into the evaporation part B and the absorption part A, so that the heat in the evaporation part B is transferred to the absorption part A; the upper part of the isolation plate C is provided with a steam channel 20 connecting the evaporation part and the absorption part, and a steam control valve 21 is provided on the steam channel. A vacuum pump 23 and a negative pressure control valve 22 are respectively provided above the evaporation part and the absorption part, and the interior of the evaporation part B and the absorption part A is in a high vacuum state, and the evaporation pressure in the evaporation part B is maintained constant;

[0039] The evaporation part B is provided with a first liquid distributor 9 and a first heat exchanger 2 which are distributed up and down. The first liquid distributor 9 is arranged below the steam channel 20, and the first heat exchanger is externally connected to a low-temperature heat source; the bottom discharge port of the evaporation part B is connected to the refrigerant circulation pump 7, the refrigerant internal circulation pipe 8, and the first liquid distributor 9 in sequence; the refrigerant storage tank 3 transports refrigerant liquid to the evaporation part B through the refrigerant circulation pump 7 and the first liquid distributor 9 which are connected to the refrigerant storage tank 3 in sequence through the refrigerant circulation pump 7 and the first liquid distributor 9 which are connected to the refrigerant storage tank 3 in sequence. After a proper amount of refrigerant liquid is stored in the evaporation part B, the refrigerant circulation pump 7 continuously sucks out the refrigerant liquid in the evaporation part B and transports it back to the first liquid distributor 9. The refrigerant liquid circulates in the evaporation part and fully contacts with the first heat exchanger 2. The refrigerant liquid absorbs heat and evaporates, and the generated refrigerant vapor flows into the absorption part A through the steam channel 20;

[0040] The absorption part A is provided with a second liquid distributor 14 and a second heat exchanger 5 distributed up and down. The second liquid distributor 14 is arranged below the steam channel 20. The second heat exchanger 5 is externally connected to a high-temperature heat source. The bottom discharge port of the absorption part A is connected to the solution circulation pump 12, the solution internal circulation pipe 13, and the second liquid distributor 14 in sequence; the absorbent concentrated solution in the absorbent concentrated solution storage tank 16 is transported to the second liquid distributor 14 through the absorbent replenishment pipe 15 and the solution circulation pump 12. After a proper amount of absorbent concentrated solution is stored in the absorption part A, the solution circulation pump 12 continuously sucks out the absorbent concentrated solution in the absorption part and transports it back to the second liquid distributor 14. The absorbent concentrated solution circulates in the absorption part and fully contacts with the refrigerant vapor and the second heat exchanger 5. The absorbent concentrated solution absorbs the refrigerant vapor, and the generated negative pressure causes the refrigerant liquid in the evaporation part B to evaporate continuously. The generated absorption heat is transported to the high-temperature heat source through the second heat exchanger 5, and the generated absorbent dilute solution is discharged to the absorbent dilute solution storage tank 19 through the absorption part dilute solution outlet.

[0041] The first and second heat exchangers 2, 5 can be plastic heat exchangers composed of corrosion-resistant plastic capillaries.

[0042] The liquid inlet and outlet of the first heat exchanger 2 are respectively connected to the cold medium circulation pipeline 1, and the cold medium circulation pipeline 1 is connected to the low-temperature heat source. The cold medium flowing in the first heat exchanger 2 exchanges heat with the refrigerant liquid in the evaporation part, so that the heat is transported from the low-temperature heat source to the evaporation part. The cold medium flowing in the first heat exchanger 2 exchanges heat with the refrigerant liquid in the evaporation part B. The refrigerant liquid absorbs heat and evaporates. The generated refrigerant vapor carries heat and is transported to the absorption part A. After the cold medium flowing in the first heat exchanger 2 exchanges heat with the refrigerant, the obtained cooling capacity is output to the outside through the cold medium circulation pipeline 1.

[0043] The liquid inlet and outlet of the second heat exchanger 5 are respectively connected to the heat medium circulation pipeline 4, and the heat medium circulation pipeline 4 is connected to the high-temperature heat source. The heat medium flowing in the second heat exchanger 5 exchanges heat with the steam and solution in the absorption part A, and the heat absorbed in the absorption part A is transported to the high-temperature heat source.

[0044] The semiconductor refrigeration sheet 24 penetrates into the absorption part A and the evaporation part B and is partially covered with an anti-corrosion coating. The semiconductor refrigeration sheet 24 is connected to an external power supply. When the semiconductor refrigeration sheet 24 is powered on, the evaporation part transfers heat to the absorption part, further enhancing the cooling effect of the evaporation part B and the heating effect of the absorption part A.

[0045] The dilute solution outlet of the absorption part is arranged on the side of the absorption part A. One end of the dilute solution outlet of the absorption part is connected to the built-in suction nozzle 18, and the other end is connected to the absorbent dilute solution storage tank 19 through the drainage pump and the dilute solution drainage pipe 17. The suction nozzle 18 floats on the liquid surface in the absorption part. The absorbent dilute solution generated in the absorption part is sucked out by the suction nozzle and then pumped to the absorbent dilute solution storage tank 19. For the absorbent dilute solution with obvious concentration stratification, it is particularly suitable to use the suction nozzle 18 to suck it out of the absorption part A. When discharging the dilute solution, the dilute solution containing more refrigerant liquid in the upper layer can be discharged, while the solution with higher concentration in the lower layer is retained, which improves the utilization rate of the absorbent solution and reduces the frequency of the absorbent concentrated solution storage tank 16 replenishing the absorbent concentrated solution for the absorption part A.

[0046] A liquid level sensor is provided in the evaporation part B, and a concentration and liquid level sensor is provided in the absorption part A. The above sensors are connected to the control module, and the control module automatically controls the addition of refrigerant liquid to the evaporation part B, the addition of absorbent concentrated solution to the absorption part A, or the discharge of the absorbent dilute solution in the absorption part A.

[0047] The steam channel 20 and the steam control valve 21 are both made of anti-corrosion plastics. The steam control valve 21 is opened to allow refrigerant steam to flow between the evaporation part B and the absorption part A. When the pressure on both sides reaches equilibrium, the steam control valve 21 is closed to cut off the steam flow between the evaporation part B and the absorption part A.

[0048] The concentrated absorbent solution in the absorption part A absorbs the refrigerant vapor, and the negative pressure formed causes the steam control valve 21 to open, causing the refrigerant liquid in the evaporation part B to evaporate and cause the vapor to flow into the absorption part A, and continuously absorbs heat from the low-temperature heat source through the evaporation of the refrigerant liquid.

[0049] The negative pressure control valve 22 and the vacuum pump 23 are both anti-corrosion devices used to control the negative pressure inside the evaporation part B and the absorption part A.

[0050] The sealed container and the isolation plate C have a certain degree of heat insulation capability. The entire sealed container and related components and pipe fittings are made of polymer materials (plastic, fiberglass), so they have sufficient corrosion resistance.

[0051] The refrigerant circulation pump 7 and the solution circulation pump 12 are preferably peristaltic pumps.

[0052] The first liquid distributor 9 and the second liquid distributor 14 are both hollow components made of polymer (such as plastic) materials with their surfaces covered with nozzles. The first liquid distributor 9 is used to evenly spray the refrigerant liquid into the internal space of the evaporation part B, and the second liquid distributor 14 is used to evenly spray the absorbent solution into the internal space of the absorption part A.

[0053] The utility model provides a separation type absorption heat pump, which uses the absorbent concentrated solution in the absorption part A to absorb the refrigerant vapor as the driving force. The absorbent concentrated solution absorbs the refrigerant vapor, and the negative pressure formed causes the refrigerant liquid in the evaporation part B to evaporate. The evaporation part B continuously absorbs heat from the low-temperature heat source through the evaporation of the refrigerant liquid, and the absorption part A continuously releases the absorption heat through the absorption of the refrigerant vapor by the absorbent concentrated solution and transports it to the high-temperature heat source, thereby achieving the purpose of transporting the heat of the low-temperature heat source to the high-temperature heat source; the refrigerant liquid evaporates and absorbs the heat, causing the temperature in the evaporation part to drop, and the absorbent solution absorbs the vapor, causing the temperature in the absorption part to rise, so that the device has both cooling and heating performance. The isolation plate C is embedded with a semiconductor refrigeration sheet 24, and when the semiconductor refrigeration sheet 24 is powered on, the heat on both sides of the partition is transferred to enhance the cooling / heating effect.

[0054] The absorbent concentrated solution used in the utility model is a solution with strong absorption capacity, such as lithium bromide, lithium chloride, lithium iodide, calcium chloride solution and similar salt solutions, or a mixed solution composed of two or more of the above solutions.

[0055] The refrigerant liquid used in the utility model is water, or various low-boiling point liquids that are easily absorbed by the absorbent under normal pressure or low pressure. In order to simplify the system and reduce the corresponding operating energy consumption and costs, water is preferably selected as the refrigerant liquid. After the refrigerant liquid (water) evaporated in the evaporation part is absorbed by the absorbent, it is not regenerated and recovered. The refrigerant liquid (water) lost in the evaporation part is replenished by the refrigerant tank 3 through the refrigerant replenishing pipe 10 and the refrigerant circulation pump 7 to keep the equipment running.

[0056] Example 2

[0057] like Figure 1 Based on Example 1, this example provides a separation type absorption heat pump, which further includes a regenerator, or a regenerator and a condenser.

[0058] The regenerator is externally driven by energy, and the liquid inlet of the regenerator is connected to the dilute solution outlet of the absorption part A and the absorbent dilute solution storage tank 19 through pipelines, and the liquid discharge port of the regenerator is connected to the absorbent concentrated solution storage tank 16 through a pipeline. The absorbent dilute solution in the absorption part A or the absorbent dilute solution storage tank 19 is pumped into the regenerator, and the absorbent concentrated solution is generated after regeneration. The absorbent concentrated solution generated in the regenerator is transported to the absorbent concentrated solution storage tank 16 for storage through a pipeline.

[0059] The regenerator is a solution heating device, which is composed of a container with an inlet, a discharge port and an exhaust port and a heating component. The exhaust port of the solution heating device is provided with a one-way valve that can be connected to the atmosphere, or the exhaust port is connected to the condenser and the refrigerant storage tank 3 in sequence through a pipeline; the solution heating device can also be provided with a vacuum device to make the interior of the solution heating device a negative pressure state.

[0060] The absorbent dilute solution in the absorption part A or the absorbent dilute solution storage tank 19 is pumped into the solution heating device, and after heating, an absorbent concentrated solution and refrigerant vapor are generated. The generated absorbent concentrated solution is transported to the absorbent concentrated solution storage tank 16 through a pipeline, and the generated refrigerant vapor is directly discharged into the air through an open exhaust port, or transported to a condenser through a pipeline, condensed into liquid, and then transported to the refrigerant storage tank 3. Water is preferably selected as the refrigerant liquid, and the water vapor evaporated by heating in the solution heating device can be directly discharged into the air without being recycled through a condenser.

[0061] The regenerator is an electrodialysis device, and the absorption part A or the absorbent dilute solution storage tank 19 is connected to the electrodialysis device through a pipeline. The absorbent dilute solution in the absorption part A or the absorbent dilute solution storage tank 19 is pumped into the electrodialysis device, and the absorbent concentrated solution generated after electrodialysis treatment is transported to the absorbent concentrated solution storage tank 16 through a pipeline.

[0062] The dilute solution is purified by electrodialysis (ion exchange membrane): the dilute solution is injected into the electrodialysis device, and the chemical substances in the solution are ionized by applying voltage to the solution using the electrodes on both sides and the ion exchange membrane in the middle, so that the positive and negative ions move to both sides of the ion exchange membrane and gather, completing the solution concentration process. This technology is a mature process, and the typical working principle is the same as that of the ion exchange membrane electrodialysis device used in seawater desalination equipment.

[0063] The regenerator is a reverse osmosis membrane device. The absorption part A or the absorbent dilute solution storage tank 19 is connected to the reverse osmosis membrane device through a pipeline. The absorbent dilute solution in the absorption part A or the absorbent dilute solution storage tank 19 is pumped to the reverse osmosis membrane device, and the absorbent concentrated solution generated after reverse osmosis treatment is transported to the absorbent concentrated solution storage tank 16 through a pipeline.

[0064] Use RO membrane (reverse osmosis membrane) technology to concentrate the solution: Since the reverse osmosis membrane selectively allows molecules of appropriate size to pass through the molecular sieve of the membrane wall under pressure, an RO membrane that allows water molecules to pass through can be selected, and pressure can be applied on both sides to allow water molecules to pass through the membrane wall, while salt molecules larger than water molecules are left on the other side of the membrane wall, thereby achieving the result of concentrating the solution. This technology is a mature process, and the typical working principle is no different from the membrane separation technology in sewage treatment.

[0065] The above-mentioned solution heating device, electrodialysis device, and reverse osmosis membrane device are different types of solution regenerators, and the regenerator type can be adaptively selected according to factors such as the difference in boiling points of the refrigerant and the absorbent, the difference in molecular weight, the refrigerant recovery value, and the regeneration energy consumption.

[0066] The practical separation type absorption heat pump preferably uses water as the refrigerant. When water is used as the refrigerant, the refrigerant water lost by evaporation in the evaporation part is directly separated during the regeneration process of the absorbent dilute solution, and is no longer repeatedly transported to the evaporation part for use, but can be directly heated in the regenerator for evaporation, discharged or collected for other purposes; the refrigerant water lost in the evaporation part is replenished by the refrigerant tank 3, and only relatively cheap refrigerant water needs to be continuously consumed to keep the equipment running, thus eliminating the condenser and the condensed water reflux transportation circuit, thereby improving the efficiency of the regenerator and reducing the transportation energy consumption.

[0067] Example 3

[0068] like Figure 1 Based on Example 1, this example provides a separate absorption heat pump, wherein the absorbent dilute solution storage tank 19 and the absorbent concentrated solution storage tank 16 are connected to the chemical regeneration system, and the absorbent dilute solution in the absorbent dilute solution storage tank 19 is transported to the chemical regeneration system to participate in the chemical reaction, and the absorbent concentrated solution is generated after chemical treatment, and then transported to the absorbent concentrated solution storage tank 16.

[0069] The practical separation type absorption heat pump and the chemical regeneration system connected with it can share a group of absorbent concentrated / dilute solution storage tanks. Alternatively, the absorbent concentrated solution storage tank 16 and the absorbent dilute solution storage tank 19 can be mobile storage tanks. The absorption heat pump and the chemical regeneration system are both equipped with more than one group of absorbent concentrated / dilute solution storage tanks. When long-distance transportation or pipeline connection is inconvenient, the absorbent concentrated / dilute solution storage tanks can be directly transported, so that the connection between the absorption heat pump and the chemical regeneration system is not limited by the location and distance.

[0070] Many industrial chemical treatment systems (such as air carbon capture systems, etc.) will produce regeneration of intermediate reactants (gas, solid or solution) during the chemical treatment process. This practical separation absorption heat pump can utilize the existing chemical regeneration treatment system to achieve the regeneration and recycling of the absorbent while recovering the waste heat of the reaction, so that the continuous operation of the absorption heat pump no longer depends on the regenerator and condenser, greatly reducing the driving energy consumption of the absorption heat pump, and can be flexibly used in a variety of places.

[0071] The above embodiments are only used as an explanation of the utility model and do not limit the utility model in any way. Based on the technical solution disclosed in the utility model, those skilled in the art can make a variety of replacements with the same or equivalent technical means, and all technical solutions obtained by replacing the same or equivalent technical means belong to the protection scope of the claims of the utility model.

Claims

1. A separate absorption heat pump, characterized in that: It includes an evaporation part and an absorption part which are centrally arranged in a closed container and separated by a partition plate and distributed on the left and right sides, and also includes an external refrigerant storage tank, an absorbent concentrated solution storage tank, and an absorbent dilute solution storage tank; The isolation plate is embedded with semiconductor cooling sheets extending into the left and right sides, and the semiconductor cooling sheets are connected to an external power supply to transfer the heat in the evaporation part to the absorption part; a steam channel connecting the evaporation part and the absorption part is provided on the upper part of the isolation plate, a steam control valve is provided on the steam channel, a vacuum pump and a negative pressure control valve are provided above the evaporation part and the absorption part, respectively, the evaporation part and the absorption part are in a high vacuum state and the evaporation pressure in the evaporation part is kept constant; The evaporator is provided with a first liquid distributor and a first heat exchanger distributed up and down, and the first heat exchanger is externally connected to a low-temperature heat source; the bottom discharge port of the evaporator is sequentially connected to the refrigerant circulation pump and the first liquid distributor pipeline; the refrigerant storage tank conveys refrigerant liquid to the evaporator through the refrigerant circulation pump and the first liquid distributor which are sequentially connected to the refrigerant storage tank through the refrigerant circulation pump and the first liquid distributor which are sequentially connected to the refrigerant storage tank through the pipeline; after a proper amount of refrigerant liquid is stored in the evaporator, the refrigerant circulation pump continuously sucks out the refrigerant liquid in the evaporator and conveys it back to the first liquid distributor; the refrigerant liquid circulates in the evaporator and contacts with the first heat exchanger for heat exchange; the refrigerant liquid absorbs heat and evaporates, and the generated refrigerant vapor flows into the absorption part through the steam channel; The absorption section is provided with a second liquid distributor and a second heat exchanger distributed up and down. The second heat exchanger is externally connected to a high-temperature heat source. The bottom discharge port of the absorption section is connected to the solution circulation pump and the second liquid distributor pipeline in sequence. The absorbent concentrated solution in the absorbent concentrated solution storage tank is transported to the second liquid distributor by the solution circulation pump. After an appropriate amount of absorbent concentrated solution is stored in the absorption section, the solution circulation pump continuously sucks out the absorbent concentrated solution in the absorption section and transports it back to the second liquid distributor. The absorbent concentrated solution circulates in the absorption section and is in full contact with the refrigerant vapor and the second heat exchanger. The absorbent concentrated solution absorbs the refrigerant vapor, and the generated negative pressure causes the refrigerant liquid in the evaporation section to continuously evaporate and absorb heat from the low-temperature heat source. The generated absorption heat is transported to the high-temperature heat source via the second heat exchanger, and the generated absorbent dilute solution is discharged to the absorbent dilute solution storage tank via the dilute solution outlet of the absorption section.

2. A separate absorption heat pump according to claim 1, characterized in that: It also includes a regenerator, or a regenerator and a condenser; the regenerator is externally connected to a driving energy source, the liquid inlet of the regenerator is connected to the dilute solution outlet of the absorption part and the absorbent dilute solution storage tank through a pipeline, and the liquid discharge port of the regenerator is connected to the dilute solution outlet of the absorption part and the absorbent dilute solution storage tank through a pipeline. The absorbent concentrated solution is connected to the absorbent concentrated solution storage tank through a pipeline, and the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped into the regenerator, and the absorbent concentrated solution is generated after regeneration. The absorbent concentrated solution generated in the regenerator is transported to the absorbent concentrated solution storage tank through a pipeline for storage.

3. A separate absorption heat pump according to claim 2, characterized in that: The regenerator is a solution heating device, which is composed of a container with a liquid inlet, a liquid discharge port and an exhaust port and a heating component; the exhaust port of the solution heating device is provided with a one-way valve to communicate with the atmosphere, or the exhaust port is connected to the condenser and the refrigerant storage tank in sequence through a pipeline; The absorbent dilute solution in the absorption section or the absorbent dilute solution storage tank is pumped into the solution heating device, where it is heated to generate an absorbent concentrated solution and refrigerant vapor. The generated absorbent concentrated solution is transported to the absorbent concentrated solution storage tank via a pipeline, and the generated refrigerant vapor is discharged into the air via an exhaust port, or transported to a condenser via a pipeline, condensed into liquid, and then transported to the refrigerant storage tank.

4. A separate absorption heat pump according to claim 2, characterized in that: The regenerator is an electrodialysis device, the absorbent dilute solution in the absorption part or the absorbent dilute solution storage tank is pumped into the electrodialysis device, and the absorbent concentrated solution generated after electrodialysis treatment is transported to the absorbent concentrated solution storage tank through a pipeline.

5. A separate absorption heat pump according to claim 2, characterized in that: The regenerator is a reverse osmosis membrane device. The absorbent dilute solution in the absorption part or absorbent dilute solution storage tank is pumped to the reverse osmosis membrane device, and the absorbent concentrated solution generated after reverse osmosis treatment is transported to the absorbent concentrated solution storage tank through a pipeline.

6. A separate absorption heat pump according to claim 1, characterized in that: The absorbent dilute solution storage tank is connected to the chemical regeneration system. The absorbent dilute solution in the absorbent dilute solution storage tank is transported to the chemical regeneration system to participate in chemical reaction, and after chemical treatment, an absorbent concentrated solution is generated, which is then transported to the absorbent concentrated solution storage tank.

7. A separate absorption heat pump according to claim 1, characterized in that: The liquid inlet and outlet of the first heat exchanger are respectively connected to the cold medium circulation pipeline, and the cold medium circulation pipeline is connected to the low-temperature heat source. The cold medium flowing in the first heat exchanger and the cold medium circulation pipeline transfers the heat of the low-temperature heat source to the evaporation part, and at the same time outputs the cold energy obtained after heat exchange in the evaporation part to the outside of the evaporation part.

8. A separate absorption heat pump according to claim 1, characterized in that: The liquid inlet and outlet of the second heat exchanger are respectively connected to the heat medium circulation pipeline, the heat medium circulation pipeline is connected to the high-temperature heat source, and the heat medium flowing in the second heat exchanger and the heat medium circulation pipeline transfers the heat absorbed in the absorption part to the high-temperature heat source.

9. A separate absorption heat pump according to claim 1, characterized in that: The dilute solution outlet of the absorption part is arranged on the side of the absorption part, one end of the dilute solution outlet of the absorption part is connected to the built-in suction nozzle, and the other end is connected to the absorbent dilute solution storage tank through a discharge pump and a dilute solution discharge pipe. The suction nozzle floats on the liquid surface in the absorption part, and the absorbent dilute solution generated in the absorption part is sucked out by the suction nozzle and pumped to the absorbent dilute solution storage tank.

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