Latent / Sensible Heat Separation Type Dehumidification Refrigeration and Desalination System Driven by Mine Geothermal Heat Pump

Abstract

The present invention discloses a latent / sensible heat separation type dehumidification, refrigeration and fresh water production system driven by mine geothermal heat pump, which includes an ejector heat pump system, a mine air dehumidification system, an absorption ejector refrigeration system and a fresh water collection system; the ejector heat pump includes a heat pump low-temperature evaporator, a compressor, a heat pump ejector, a heat pump condenser and a heat pump high-temperature evaporator; the heat pump low-temperature evaporator, the compressor, the heat pump ejector and the heat pump condenser are sequentially closed-loop to form a first circulation loop, and the heat pump high-temperature evaporator, the heat pump ejector and the heat pump condenser are sequentially closed-loop to form a second circulation loop; the mine air dehumidification system includes a solution generator, a solution dehumidification absorber and a solution dehumidification condenser; the absorption ejector refrigeration system includes an absorption refrigeration generator and an absorption refrigeration condenser. This system improves the high-temperature and high-humidity working environment in the deep part of the mine, realizes the latent / sensible heat separation type dehumidification of the mine air, reduces the dehumidification energy consumption; realizes the cascade utilization of heat energy and realizes the production of fresh water with low power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of low-grade thermal energy utilization, and particularly to a latent / sensible heat separation type dehumidification, refrigeration and desalination system driven by a mine geothermal heat pump. Background Art

[0002] Coal is an important part of the national economy and the main energy resource in China, accounting for up to 70% of the primary energy production and consumption. A large amount of mine water is generated during underground coal mining. About 6.88 billion m 3 of mine water is produced by Chinese coal mines every year. After the mine water is lifted to the ground in underground mines, it is directly discharged, causing serious waste of water resources and thermal energy resources. The coal mining in China is gradually advancing rapidly from shallow to deep. Under the complex environment of "high temperature and high permeability" in the deep underground, an abnormal high-temperature and high-humidity working environment has been formed in the deep part of the mine. The underground working environment is becoming increasingly harsh, and local thermal disaster high-temperature mines will gradually develop into regional thermal disaster high-temperature mines. At present, there are more than a hundred mines in China with a mining depth exceeding 1,000 meters, and the environmental temperature of the underground excavation working face is as high as 40°C, and the relative humidity is close to 100%. The high-temperature and high-humidity environment greatly endangers the physical and mental health of the workers in the excavation working face, resulting in the distraction of the underground workers. This not only causes low production efficiency in the mine, but also easily induces mine production accidents, thus forming a mine thermal disaster. At the same time, most coal mining areas are important recharge areas and regulation areas of underground water resources, and the fresh water resources are scarce, resulting in a tense situation in the fresh water supply in the mine area. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a latent / sensible heat separation type dehumidification, refrigeration and desalination system driven by a mine geothermal heat pump.

[0004] The present invention is realized through the following technical solutions: A latent / sensible heat separation dehumidification, refrigeration and fresh water production system driven by mine geothermal heat pump, comprising an ejector heat pump system, a mine air dehumidification system, an absorption ejector refrigeration system and a fresh water collection system; The ejector heat pump includes a heat pump low-temperature evaporator, a compressor, a heat pump ejector, a heat pump condenser and a heat pump high-temperature evaporator; The heat pump low-temperature evaporator, compressor, heat pump ejector and heat pump condenser are sequentially closed-loop to form a first circulation loop, and the heat pump high-temperature evaporator, heat pump ejector and heat pump condenser are sequentially closed-loop to form a second circulation loop; The mine air dehumidification system includes a solution generator, a solution dehumidification absorber and a solution dehumidification condenser; The high-temperature air in the deep part of the mine enters the heat pump high-temperature evaporator, absorbs the sensible heat of the air for it and then enters the solution dehumidification absorber, and the circulating working fluid of the heat pump low-temperature evaporator absorbs the heat of the mine water pool and then enters the compressor; The absorption ejector refrigeration system includes an absorption refrigeration generator and an absorption refrigeration condenser. The absorption refrigeration generator is respectively connected with the heat pump condenser and the solution generator, the solution generator is connected with the heat pump condenser, the absorption refrigeration condenser is coupled with the solution dehumidification condenser, and the solution generator is connected with the fresh water collection system.

[0005] It further includes a heat pump high-pressure throttle valve and a heat pump low-pressure throttle valve; The first outlet of the heat pump condenser is connected to the heat pump low-temperature evaporator through the heat pump low-pressure throttle valve, and the heat pump high-temperature evaporator is connected to the connecting pipeline between the first outlet of the heat pump condenser and the heat pump low-pressure throttle valve through the heat pump high-pressure throttle valve; The high-temperature refrigerant at the first outlet of the heat pump condenser is divided into two paths. One path passes through the heat pump high-pressure throttle valve and enters the heat pump high-temperature evaporator, and the other path passes through the heat pump low-pressure throttle valve and enters the heat pump low-temperature evaporator.

[0006] The heat pump low-temperature evaporator is coupled and connected with the mine water pool; The first inlet of the heat pump ejector is connected to the compressor, and the second inlet of the heat pump ejector is connected to the heat pump high-temperature evaporator; The high-temperature and high-pressure refrigerant at the compressor outlet is used to eject the refrigerant at the heat pump high-temperature evaporator outlet through the heat pump ejector.

[0007] The mine air dehumidification system further includes a solution dehumidification system regenerator, a solution dehumidification system booster pump, and a solution dehumidification system throttle valve; the inlet of the solution dehumidification system booster pump is connected to the outlet of the solution dehumidification absorber, the outlet of the solution dehumidification system booster pump is connected to the first inlet of the solution dehumidification system regenerator, the first outlet of the solution dehumidification system regenerator is connected to the first inlet of the solution generator, and the first outlet of the solution generator is connected to the second inlet of the solution dehumidification system regenerator; the inlet of the solution dehumidification system throttle valve is connected to the second outlet of the solution dehumidification system regenerator, the outlet of the solution dehumidification system throttle valve is connected to the solution inlet of the solution dehumidification condenser, and the solution outlet of the solution dehumidification condenser is connected to the inlet of the solution dehumidification absorber.

[0008] The absorption jet refrigeration system further includes cooling water, an absorption refrigeration condenser, an absorption refrigeration refrigerant regenerator, an absorption refrigeration evaporator, an absorption refrigeration absorber, an absorption refrigeration solution regenerator, and an absorption refrigeration ejector; the first inlet of the heat pump condenser is connected to the outlet of the heat pump ejector, the second inlet of the heat pump condenser is connected to the first outlet of the absorption refrigeration generator, and the first inlet of the absorption refrigeration generator is connected to the first outlet of the solution generator; the second outlet of the absorption refrigeration generator is connected to the inlet of the absorption refrigeration ejector, and the outlet of the absorption refrigeration ejector is connected to the first inlet of the absorption refrigeration condenser; the cooling water inlet of the solution dehumidification condenser is connected to the first outlet of the absorption refrigeration condenser, the cooling water outlet of the solution dehumidification condenser is connected to the inlet of the cooling water, and the outlet of the cooling water is connected to the second inlet of the absorption refrigeration condenser; the first inlet of the absorption refrigeration refrigerant regenerator is connected to the second outlet of the absorption refrigeration condenser, the first outlet of the absorption refrigeration refrigerant regenerator is connected to the absorption refrigeration evaporator, and the absorption refrigeration evaporator is coupled to a cold user to provide cooling capacity thereto; the outlet of the absorption refrigeration evaporator is connected to the first inlet of the absorption refrigeration absorber, the second inlet of the absorption refrigeration refrigerant regenerator is connected to the connecting pipeline between the absorption refrigeration evaporator and the absorption refrigeration absorber, and the second outlet of the absorption refrigeration refrigerant regenerator is connected to the connecting pipeline between the absorption refrigeration generator and the absorption refrigeration ejector; the outlet of the absorption refrigeration absorber is connected to the first inlet of the absorption refrigeration solution regenerator, the first outlet of the absorption refrigeration solution regenerator is connected to the second inlet of the absorption refrigeration generator, the second inlet of the absorption refrigeration solution regenerator is connected to the third outlet of the absorption refrigeration generator, and the second outlet of the absorption refrigeration solution regenerator is connected to the second inlet of the absorption refrigeration absorber.

[0009] The absorption jet refrigeration system further includes a first absorption refrigeration throttle valve, a second absorption refrigeration throttle valve, and an absorption refrigeration booster pump; the first absorption refrigeration throttle valve is installed on the connecting pipeline between the first outlet of the absorption refrigeration refrigerant regenerator and the absorption refrigeration evaporator; the second absorption refrigeration throttle valve is installed on the connecting pipeline between the second outlet of the absorption refrigeration solution regenerator and the second inlet of the absorption refrigeration absorber; the absorption refrigeration booster pump is installed on the connecting pipeline between the outlet of the absorption refrigeration absorber and the first inlet of the absorption refrigeration solution regenerator.

[0010] The absorption refrigeration absorber is provided with lithium bromide concentrated solution. The water vapor at the outlet of the absorption refrigeration evaporator is divided into two paths. One path enters the absorption refrigeration absorber through the absorption refrigeration refrigerant regenerator and is absorbed by the lithium bromide concentrated solution. The other path serves as the ejector fluid, is ejected by the high-temperature and high-pressure water vapor at the outlet of the absorption refrigeration generator through the absorption refrigeration refrigerant regenerator, and enters the absorption refrigeration condenser through the absorption refrigeration ejector.

[0011] The fresh water collection system includes a fresh water condenser, a fresh water tank, and a vacuum pump. One end of the fresh water condenser is connected to the second outlet of the solution generator, the other end of the fresh water condenser is connected to the fresh water tank, and the vacuum pump is installed on the connecting pipeline between the fresh water condenser and the solution generator.

[0012] A valve is installed on the connecting pipeline between the pipeline between the fresh water condenser and the solution generator and the vacuum pump.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] (1) This system integrates a jet heat pump system, a mine air dehumidification system, an absorption jet refrigeration system, and a fresh water collection system, uses the geothermal energy of mine water to improve the high-temperature and high-humidity working environment in the deep mine, and alleviates the shortage of fresh water resources in the mining area.

[0015] (2) Coupling the jet heat pump system with the mine air dehumidification system realizes the latent / sensible heat separation dehumidification of mine air and reduces the dehumidification energy consumption.

[0016] (3) The high-temperature hot water produced by the jet heat pump first drives the mine air dehumidification system and then drives the absorption jet refrigeration system to realize the cascade utilization of thermal energy.

[0017] (4) The mine air dehumidification system adopts a vacuum generation mode, reduces the driving force, and realizes low-power fresh water production. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Meanings of the reference numerals in the figure: 1, mine water pool; 2, low-temperature evaporator of heat pump; 3, compressor; 4, heat pump ejector; 5, heat pump condenser; 6, high-pressure throttle valve of heat pump; 7, high-temperature evaporator of heat pump; 8, high-temperature air; 9, low-pressure throttle valve of heat pump; 10, solution generator; 11, valve; 12, vacuum pump; 13, fresh water condenser; 14, fresh water tank; 15, regenerator of solution dehumidification system; 16, booster pump of solution dehumidification system; 17, throttle valve of solution dehumidification system; 18, solution dehumidification absorber; 19, solution dehumidification condenser; 20, cooling water; 21, absorption refrigeration condenser; 22, absorption refrigeration refrigerant regenerator; 23, first absorption refrigeration throttle valve; 24, absorption refrigeration evaporator; 25, cold user; 26, absorption refrigeration absorber; 27, booster pump of absorption refrigeration; 28, second absorption refrigeration throttle valve; 29, absorption refrigeration solution regenerator; 30, absorption refrigeration generator; 31, absorption refrigeration ejector. Specific embodiments

[0020] The content of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Embodiment

[0022] Refer to Figure 1 , which is a latent / sensible heat separation type dehumidification, refrigeration and fresh water production system driven by mine geothermal heat pump, including a jet heat pump system, a mine air dehumidification system, an absorption jet refrigeration system and a fresh water collection system; the jet heat pump includes a low-temperature evaporator 2 of heat pump, a compressor 3, a heat pump ejector 4, a heat pump condenser 5 and a high-temperature evaporator 7 of heat pump; the low-temperature evaporator 2 of heat pump, the compressor 3, the heat pump ejector 4 and the heat pump condenser 5 form a first closed-loop circulation circuit in sequence, and the high-temperature evaporator 7 of heat pump, the heat pump ejector 4 and the heat pump condenser 5 form a second closed-loop circulation circuit in sequence; the mine air dehumidification system includes a solution generator 10, a solution dehumidification absorber 18 and a solution dehumidification condenser 19; the high-temperature air 8 in the deep part of the mine enters the high-temperature evaporator 7 of heat pump and absorbs the sensible heat of the air for it and then enters the solution dehumidification absorber 18, and the circulating refrigerant of the low-temperature evaporator 2 of heat pump absorbs the heat of the mine water pool 1 and then enters the compressor 3; the absorption jet refrigeration system includes an absorption refrigeration generator 30 and an absorption refrigeration condenser 21, the absorption refrigeration generator 30 is respectively connected with the heat pump condenser 5 and the solution generator 10, the second inlet of the solution generator 10 is connected with the second outlet of the heat pump condenser 5, the absorption refrigeration condenser 21 is coupled with the solution dehumidification condenser 19, and the solution generator 10 is connected with the fresh water collection system. In this embodiment, the high-temperature hot water produced by the heat pump condenser 5 first enters the solution generator 10 and then enters the absorption refrigeration generator 30 to realize the stepped utilization of heat energy.

[0023] It also includes a heat pump high-pressure throttle valve 6 and a heat pump low-pressure throttle valve 9; the first outlet of the heat pump condenser 5 is connected to the heat pump low-temperature evaporator 2 through the heat pump low-pressure throttle valve 9, and the heat pump high-temperature evaporator 7 is connected to the pipeline between the first outlet of the heat pump condenser 5 and the heat pump low-pressure throttle valve 9 through the heat pump high-pressure throttle valve 6; the high-temperature refrigerant in the first outlet of the heat pump condenser 5 is divided into two paths, one path passes through the heat pump high-pressure throttle valve 6 and enters the heat pump high-temperature evaporator 7, and the other path passes through the heat pump low-pressure throttle valve 9 and enters the heat pump low-temperature evaporator 2 to realize the extraction of the heat energy of the mine water. The high-temperature air 8 deep in the mine first enters the heat pump high-temperature evaporator 7, and then enters the solution dehumidification absorber 18 to realize the latent / sensible heat separation dehumidification of the mine air, reducing the dehumidification energy consumption.

[0024] The heat pump low-temperature evaporator 2 is coupled to the mine water pool 1; the first inlet of the heat pump ejector 4 is connected to the compressor 3, and the second inlet of the heat pump ejector 4 is connected to the heat pump high-temperature evaporator 7; the high-temperature and high-pressure refrigerant at the outlet of the compressor 3 is used to eject the refrigerant at the outlet of the heat pump high-temperature evaporator 7 through the heat pump ejector 4. On the one hand, it realizes the separate utilization of energy by quality, and on the other hand, it increases the refrigerant flow rate of the heat pump condenser 5, and the refrigeration power is improved.

[0025] The mine air dehumidification system also includes a solution dehumidification system regenerator 15, a solution dehumidification system booster pump 16 and a solution dehumidification system throttle valve 17; the inlet of the solution dehumidification system booster pump 16 is connected to the outlet of the solution dehumidification absorber 18, the outlet of the solution dehumidification system booster pump 16 is connected to the first inlet of the solution dehumidification system regenerator 15, the first outlet of the solution dehumidification system regenerator 15 is connected to the first inlet of the solution generator 10, and the first outlet of the solution generator 10 is connected to the second inlet of the solution dehumidification system regenerator 15; the inlet of the solution dehumidification system throttle valve 17 is connected to the second outlet of the solution dehumidification system regenerator 15, the outlet of the solution dehumidification system throttle valve 17 is connected to the solution inlet of the solution dehumidification condenser 19, and the solution outlet of the solution dehumidification condenser 19 is connected to the inlet of the solution dehumidification absorber 18.

[0026] The absorption jet refrigeration system further includes cooling water 20, an absorption refrigeration condenser 21, an absorption refrigeration refrigerant regenerator 22, an absorption refrigeration evaporator 24, an absorption refrigeration absorber 26, an absorption refrigeration solution regenerator 29, and an absorption refrigeration ejector 31; a first inlet of the heat pump condenser 5 is connected to an outlet of the heat pump ejector 4, a second inlet of the heat pump condenser 5 is connected to a first outlet of the absorption refrigeration generator 30, and a first inlet of the absorption refrigeration generator 30 is connected to a first outlet of the solution generator 10; a second outlet of the absorption refrigeration generator 30 is connected to an inlet of the absorption refrigeration ejector 31, and an outlet of the absorption refrigeration ejector 31 is connected to a first inlet of the absorption refrigeration condenser 21; a cooling water inlet of the solution dehumidification condenser 19 is connected to a first outlet of the absorption refrigeration condenser 21, a cooling water 20 outlet of the solution dehumidification condenser 19 is connected to an inlet of the cooling water 20, and an outlet of the cooling water 20 is connected to a second inlet of the absorption refrigeration condenser 21; a first inlet of the absorption refrigeration refrigerant regenerator 22 is connected to a second outlet of the absorption refrigeration condenser 21, a first outlet of the absorption refrigeration refrigerant regenerator 22 is connected to the absorption refrigeration evaporator 24, and the absorption refrigeration evaporator 24 is coupled to a cold user 25 to provide cooling capacity thereto; an outlet of the absorption refrigeration evaporator 24 is connected to a first inlet of the absorption refrigeration absorber 26, a second inlet of the absorption refrigeration refrigerant regenerator 22 is connected to a connecting pipeline between the absorption refrigeration evaporator 24 and the absorption refrigeration absorber 26, and a second outlet of the absorption refrigeration refrigerant regenerator 22 is connected to a connecting pipeline between the absorption refrigeration generator 30 and the absorption refrigeration ejector 31; an outlet of the absorption refrigeration absorber 26 is connected to a first inlet of the absorption refrigeration solution regenerator 29, a first outlet of the absorption refrigeration solution regenerator 29 is connected to a second inlet of the absorption refrigeration generator 30, a second inlet of the absorption refrigeration solution regenerator 29 is connected to a third outlet of the absorption refrigeration generator 30, and a second outlet of the absorption refrigeration solution regenerator 29 is connected to a second inlet of the absorption refrigeration absorber 26.

[0027] The absorption jet refrigeration system further includes a first absorption refrigeration throttle valve 23, a second absorption refrigeration throttle valve 28, and an absorption refrigeration booster pump 27; the first absorption refrigeration throttle valve 23 is installed on a connecting pipeline between a first outlet of the absorption refrigeration refrigerant regenerator 22 and the absorption refrigeration evaporator 24; the second absorption refrigeration throttle valve 28 is installed on a connecting pipeline between a second outlet of the absorption refrigeration solution regenerator 29 and a second inlet of the absorption refrigeration absorber 26; and the absorption refrigeration booster pump 27 is installed on a connecting pipeline between an outlet of the absorption refrigeration absorber 26 and a first inlet of the absorption refrigeration solution regenerator 29.

[0028] In the absorption chiller absorber 26, there is lithium bromide concentrated solution. The water vapor at the outlet of the absorption chiller evaporator 24 is divided into two paths. One path enters the absorption chiller absorber 26 through the absorption chiller refrigerant regenerator 22 and is absorbed by the lithium bromide concentrated solution. The other path serves as the ejector fluid and is ejected by the high-temperature and high-pressure water vapor (working fluid) at the outlet of the absorption chiller generator 30 through the absorption chiller refrigerant regenerator 22 and enters the absorption chiller condenser 21 through the absorption chiller ejector 31. The introduction of the absorption chiller ejector 31 increases the refrigerant flow rate of the absorption chiller condenser 21 and the absorption chiller evaporator 24, improving the system performance.

[0029] The fresh water collection system includes a fresh water condenser 13, a fresh water tank 14, and a vacuum pump 12. One end of the fresh water condenser 13 is connected to the second outlet of the solution generator 10, and the other end of the fresh water condenser 13 is connected to the fresh water tank 14. A vacuum pump 12 is installed on the connecting pipeline between the fresh water condenser 13 and the solution generator 10. The moisture in the high-temperature mine air 8 is absorbed by the solution dehumidifier absorber 18. The solution dehumidifier absorber 18 and the solution generator 10 achieve heat recovery and solution circulation regeneration through the solution dehumidification system regenerator 15. The solution generator 10 is connected to the vacuum pump 12 to generate vacuum in the solution generator 10, reducing the driving force for evaporation. The evaporated water vapor enters the fresh water tank 14 through the fresh water condenser 13 to achieve fresh water production.

[0030] A valve 11 is installed on the connecting pipeline between the pipeline between the fresh water condenser 13 and the solution generator 10 and the vacuum pump 12.

[0031] The working process of this embodiment is as follows:

[0032] The jet heat pump system uses R245fa as the circulating working fluid. R245fa absorbs the heat from the mine water in the mine water pool 1 in the heat pump low-temperature evaporator 2, enters the compressor 3, and the compressed high-temperature and high-pressure R245fa steam enters the heat pump condenser 5 to release heat. The high-temperature refrigerant at the outlet of the heat pump condenser 5 is divided into two paths. One path passes through the heat pump high-pressure throttle valve 6 and then enters the heat pump high-temperature evaporator 7 to provide cooling capacity for removing the sensible heat of the mine air; the other path passes through the heat pump low-pressure throttle valve 9 and then enters the heat pump low-temperature evaporator 2 to extract the thermal energy of the mine water. The high-temperature and high-pressure refrigerant at the outlet of the compressor 3 is ejected by the heat pump ejector 4 to the outlet of the heat pump high-temperature evaporator 7. On the one hand, it realizes the energy quality utilization, and on the other hand, it increases the refrigerant flow of the heat pump condenser 5, and the refrigeration power is improved. The high-temperature hot water produced by the heat pump condenser 5 first enters the solution generator 10. The solution generator 10 is connected to the vacuum pump 12 to realize the vacuum generation of the solution generator 10, reducing the driving force of the generation. The evaporated water vapor enters the fresh water tank 14 through the fresh water condenser 13 to realize the production of fresh water. The high-temperature and high-pressure LiCl concentrated solution generated by the solution generator 10 exchanges heat with the low-temperature LiCl dilute solution after pressurization from the solution dehumidification absorber 18 in the solution dehumidification system regenerator 15, and then enters the solution dehumidification absorber 18 after being depressurized by the solution dehumidification system throttle valve 17. The high-temperature air 8 of the mine first enters the heat pump high-temperature evaporator 7 to remove the sensible heat in the mine air, and then enters the solution dehumidification absorber 18. The moisture in the high-temperature air 8 of the mine is absorbed by the solution dehumidification absorber 18, realizing the latent / sensible heat separation dehumidification of the mine air, reducing the dehumidification energy consumption. The high-temperature hot water at the outlet of the solution generator 10 enters the absorption refrigeration generator 30 again, heats the LiBr solution to generate water vapor, and uses the absorption refrigeration ejector 31 as a working fluid to draw the low-pressure water vapor heated by the absorption refrigeration refrigerant regenerator 22 at the outlet of the absorption refrigeration evaporator 24, and then enters the absorption refrigeration condenser 21 after merging, and the refrigerant vapor condenses into liquid water. Then, it enters the absorption refrigeration evaporator 24 through the absorption refrigeration throttle valve, and the liquid evaporates rapidly under low pressure and absorbs the heat of the surrounding environment, thereby generating a refrigeration effect, and the produced chilled water provides cold capacity for the cold user 25. Another part of the low-temperature and low-pressure steam at the outlet of the absorption refrigeration evaporator 24 directly enters the absorption refrigeration absorber 26, is absorbed by the LiBr concentrated solution in the absorption refrigeration absorber 26, and generates a recirculated LiBr dilute solution, which enters the absorption refrigeration solution regenerator 29 through the boosting effect of the absorption refrigeration booster pump 27, and enters the absorption refrigeration generator 30 after indirect heat exchange with the LiBr concentrated solution. The lithium bromide concentrated solution generated in the generator enters the solution regenerator, and after indirect heat exchange with the lithium bromide dilute solution, enters the absorption refrigeration absorber 26 through the absorption refrigeration throttle valve to complete the LiBr solution circulation. The function of the absorption refrigeration solution regenerator 29 is to recover the heat of the high-temperature LiBr concentrated solution generated in the absorption refrigeration generator 30.

[0033] In this embodiment, for industrial waste heat, solar energy, geothermal energy, biomass energy and other fields, through the coupling of a jet heat pump system, a mine air dehumidification system, an absorption jet refrigeration system and a fresh water collection system, refrigeration and desalination are achieved, the moisture content of the mine air is reduced, and the mine working environment is improved. Using low-grade mine water geothermal energy as the low-temperature heat source, a jet high-temperature heat pump system is used to produce high-temperature hot water. The produced high-temperature hot water first drives the LiCl absorption dehumidification system and then drives the LiBr refrigeration system to realize cascade utilization of thermal energy. This system has the advantages of simple and compact structure, remarkable energy-saving effect, stable and reliable operation, and convenient control.

[0034] The above detailed description is a specific description of the feasible embodiments of the present invention. These embodiments are not intended to limit the patent scope of the present invention. Any equivalent implementation or modification made without departing from the present invention shall be included in the patent scope of this case.

Claims

1. A latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump, characterized in that: It includes a jet heat pump system, a mine air dehumidification system, an absorption jet refrigeration system and a fresh water collection system; the jet heat pump includes a heat pump low-temperature evaporator, a compressor, a heat pump ejector, a heat pump condenser and a heat pump high-temperature evaporator; The heat pump low-temperature evaporator, compressor, heat pump ejector, and heat pump condenser are closed in sequence to form a first circulation loop, and the heat pump high-temperature evaporator, heat pump ejector, and heat pump condenser are closed in sequence to form a second circulation loop; the mine air dehumidification system includes a solution generator, a solution dehumidification absorber, and a solution dehumidification condenser; the high-temperature air deep in the mine enters the heat pump high-temperature evaporator and absorbs the sensible heat of the air before entering the solution dehumidification absorber, and the circulating working fluid of the heat pump low-temperature evaporator absorbs the heat of the mine water pool before entering the compressor; the absorption injection refrigeration system includes an absorption refrigeration generator and an absorption refrigeration condenser, the absorption refrigeration generator is connected to the heat pump condenser and the solution generator respectively, the solution generator is connected to the heat pump condenser, the absorption refrigeration condenser is coupled to the solution dehumidification condenser, and the solution generator is connected to the fresh water collection system.

2. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 1 is characterized in that: It also includes a heat pump high-pressure throttle valve and a heat pump low-pressure throttle valve; the first outlet of the heat pump condenser is connected to the heat pump low-temperature evaporator through the heat pump low-pressure throttle valve, and the heat pump high-temperature evaporator is connected to the connecting pipeline between the first outlet of the heat pump condenser and the heat pump low-pressure throttle valve through the heat pump high-pressure throttle valve; the high-temperature refrigerant at the first outlet of the heat pump condenser is divided into two paths, one path enters the heat pump high-temperature evaporator through the heat pump high-pressure throttle valve, and the other path enters the heat pump low-temperature evaporator through the heat pump low-pressure throttle valve.

3. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 1 is characterized in that: The heat pump low-temperature evaporator is coupled to the mine water pool; the first inlet of the heat pump ejector is connected to the compressor, and the second inlet of the heat pump ejector is connected to the heat pump high-temperature evaporator; the high-temperature and high-pressure refrigerant at the compressor outlet is ejected to the refrigerant at the heat pump high-temperature evaporator outlet through the heat pump ejector.

4. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 1 is characterized in that: The mine air dehumidification system also includes a solution dehumidification system regenerator, a solution dehumidification system booster pump and a solution dehumidification system throttle valve; the inlet of the solution dehumidification system booster pump is connected to the outlet of the solution dehumidification absorber, the outlet of the solution dehumidification system booster pump is connected to the first inlet of the solution dehumidification system regenerator, the first outlet of the solution dehumidification system regenerator is connected to the first inlet of the solution generator, and the first outlet of the solution generator is connected to the second inlet of the solution dehumidification system regenerator; The inlet of the solution dehumidification system throttle valve is connected to the second outlet of the solution dehumidification system regenerator, the outlet of the solution dehumidification system throttle valve is connected to the solution inlet of the solution dehumidification condenser, and the solution outlet of the solution dehumidification condenser is connected to the inlet of the solution dehumidification absorber.

5. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 1 is characterized in that: The absorption jet refrigeration system also includes cooling water, an absorption refrigeration condenser, an absorption refrigeration refrigerant heat exchanger, an absorption refrigeration evaporator, an absorption refrigeration absorber, an absorption refrigeration solution heat exchanger and an absorption refrigeration ejector; the first inlet of the heat pump condenser is connected to the outlet of the heat pump ejector, the second inlet of the heat pump condenser is connected to the first outlet of the absorption refrigeration generator, and the first inlet of the absorption refrigeration generator is connected to the first outlet of the solution generator; the second outlet of the absorption refrigeration generator is connected to the inlet of the absorption refrigeration ejector, and the outlet of the absorption refrigeration ejector is connected to the first inlet of the absorption refrigeration condenser; the cooling water inlet of the solution dehumidification condenser is connected to the first outlet of the absorption refrigeration condenser, the cooling water outlet of the solution dehumidification condenser is connected to the inlet of the cooling water, and the outlet of the cooling water is connected to the second inlet of the absorption refrigeration condenser; the first inlet of the absorption refrigeration refrigerant heat exchanger is connected to the absorption The second outlet of the refrigeration condenser is connected, the first outlet of the absorption refrigeration refrigerant heat regenerator is connected to the absorption refrigeration evaporator, the absorption refrigeration evaporator is coupled to the cold user and provides cold capacity for it; the outlet of the absorption refrigeration evaporator is connected to the first inlet of the absorption refrigeration absorber, the second inlet of the absorption refrigeration refrigerant heat regenerator is connected to the connecting pipeline between the absorption refrigeration evaporator and the absorption refrigeration absorber, and the second outlet of the absorption refrigeration refrigerant heat regenerator is connected to the connecting pipeline between the absorption refrigeration generator and the absorption refrigeration ejector; the outlet of the absorption refrigeration absorber is connected to the first inlet of the absorption refrigeration solution heat regenerator, the first outlet of the absorption refrigeration solution heat regenerator is connected to the second inlet of the absorption refrigeration generator, the second inlet of the absorption refrigeration solution heat regenerator is connected to the third outlet of the absorption refrigeration generator, and the second outlet of the absorption refrigeration solution heat regenerator is connected to the second inlet of the absorption refrigeration absorber.

6. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 5 is characterized by: The absorption jet refrigeration system also includes a first absorption refrigeration throttle valve, a second absorption refrigeration throttle valve and an absorption refrigeration booster pump; the first absorption refrigeration throttle valve is installed on the connecting pipeline between the first outlet of the absorption refrigeration refrigerant regenerator and the absorption refrigeration evaporator; the second absorption refrigeration throttle valve is installed on the connecting pipeline between the second outlet of the absorption refrigeration solution regenerator and the second inlet of the absorption refrigeration absorber; the absorption refrigeration booster pump is installed on the connecting pipeline between the outlet of the absorption refrigeration absorber and the first inlet of the absorption refrigeration solution regenerator.

7. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 5 is characterized by: A lithium bromide concentrated solution is arranged in the absorption refrigeration absorber, and the water vapor at the outlet of the absorption refrigeration evaporator is divided into two paths, one path enters the absorption refrigeration absorber through the absorption refrigeration refrigerant heat regenerator to be absorbed by the lithium bromide concentrated solution, and the other path is used as an ejection fluid, which is ejected by the high-temperature and high-pressure water vapor at the outlet of the absorption refrigeration generator through the absorption refrigeration refrigerant heat regenerator and enters the absorption refrigeration condenser through the absorption refrigeration ejector.

8. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 1 is characterized by: The fresh water collection system includes a fresh water condenser, a fresh water tank and a vacuum pump. One end of the fresh water condenser is connected to the second outlet of the solution generator, and the other end of the fresh water condenser is connected to the fresh water tank. The vacuum pump is installed on the connecting pipeline between the fresh water condenser and the solution generator.

9. The latent / sensible heat separation dehumidification refrigeration and desalination system driven by a mine geothermal heat pump according to claim 8, characterized in that: A valve is installed on the connecting pipeline between the pipeline between the fresh water condenser and the solution generator and the vacuum pump.

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