Multi-stage absorption type humidifying, condensing and water purifying system

Abstract

The invention discloses a multi-stage absorption type humidifying, condensing and water purifying system, and belongs to the technical field of tap water purification. The system comprises a heat transfer working medium circulation module, a tap water circulation module, an air circulation module, a water purification circulation module and a refrigeration circulation module, and solar energy, waste heat, waste heat and the like can be fully utilized to produce pure drinking water through water. According to the system, through the multi-stage design, heat can be fully utilized in a gradient mode, and the water production efficiency of the system is greatly improved. And the system uses air as a water treatment medium, so that water waste is little, and the utilization rate of water can be greatly improved. The system is combined with solar energy and is suitable for being applied to hotels, residential quarters and other places suitable for centralized drinking water supply.

Description

Technical Field

[0001] The invention belongs to the technical field of tap water purification, and in particular relates to a multi-stage absorption humidification condensation water purification system. Background Art

[0002] Water is the source of life and the material basis for social and economic development and social progress. Therefore, developing new methods or new materials for effective sewage treatment will be of great significance to solving my country's water resource problems. Water purification refers to the purification process of removing pollutants from raw water. Its purpose is to achieve the effect of water purification through a specific procedure and use water for different purposes.

[0003] At present, the common small-scale water purification systems on the market are often realized through the traditional tap water treatment process of "coagulation, sedimentation, sand filtration, and chlorination disinfection". This backward and outdated process can only remove about 40% of toxic pollutants in the water source, and the removal effect on most chemical toxic pollutants, especially organic chemical toxic pollutants, is very unsatisfactory. In addition, this treatment method causes a large waste of common solar energy, waste heat, and residual heat in life. To solve this problem, the present invention proposes a multi-stage absorption humidification condensation water purification system. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-stage absorption humidification condensation water purification system to solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-stage absorption humidification condensation water purification system, comprising a heat transfer medium circulation module, a tap water circulation module, an air circulation module, a water purification circulation module and a refrigeration circulation module;

[0007] The heat transfer medium circulation module includes a heat source, the heat source is connected to the heat exchange coil A in the first generator, the output end of the heat exchange coil A is connected to the heat exchange coil B in the second generator, the output end of the heat exchange coil B is connected to the cavity in the multi-stage heat exchanger, and the output end of the multi-stage heat exchanger is also connected to the heat source;

[0008] The tap water circulation module includes a heat exchanger, the heat exchanger is connected to a water supply valve, and the water supply valve is also respectively connected to the seventh heat exchange coil in the first absorber and the eighth heat exchange coil in the second absorber; the output end of the seventh heat exchange coil is connected to the fourth heat exchange coil in the first condenser, the output end of the fourth heat exchange coil is connected to the first heat exchange coil in the multi-stage heat exchanger, and the output end of the first heat exchange coil is connected to the first spray device in the water purification tower;

[0009] The output end of the eighth heat exchange coil is connected to the fifth heat exchange coil in the second condenser, and the output end of the fifth heat exchange coil is connected to the second heat exchange coil in the multi-stage heat exchanger; the output end of the second heat exchange coil is connected to the second spray device in the water purification tower; a water collecting tank is provided at the bottom of the water purification tower, and the water collecting tank is further connected to the seventh heat exchange coil in the first absorber and the eighth heat exchange coil in the second absorber through a circulation pipeline;

[0010] The air circulation module includes a fan, which is fixedly installed on the top of the water purification tower. An air duct is arranged inside the water purification tower, and an air outlet is arranged at the bottom of the air duct; a first evaporator and a second evaporator are installed from top to bottom on the upper end of the water purification tower, and a ventilation pipe array is arranged inside the first evaporator and the second evaporator; a clean water collection tank is also connected to the inner wall of the water purification tower, and an air outlet is arranged between the clean water collection tank and the air duct;

[0011] The clean water circulation module includes a condensation baffle, which is arranged below the first evaporator and the second evaporator and fixedly connected to the side wall of the air duct; and also includes a clean water collecting tank, which is arranged below the condensation baffle and fixedly connected to the inner wall of the water purification tower; a water outlet is arranged at the lower end of the clean water collecting tank, and the water outlet is connected to the heat exchange coil in the heat exchanger through a connecting pipe to output clean water;

[0012] The refrigeration cycle module, the refrigerant is stored in the cavity of the first generator; the first generator is connected to the cavity of the first condenser, the first condenser is connected to a first output pipe, the end of the first output pipe is arranged at the top of the first evaporator, and the first output pipe is also installed with a first throttle valve; the lower end of the first evaporator is also connected to the cavity of the first absorber, the first absorber is further connected to the heat exchange coil C in the first heat exchanger, the connecting pipe between the first absorber and the heat exchange coil C is installed with a first solution pump, and the output end of the heat exchange coil C is connected to the cavity of the first generator; the first absorber is also connected to the cavity of the first heat exchanger through a connecting pipe, and a first valve is fixedly installed on the connecting pipe between the first absorber and the first heat exchanger; the first heat exchanger is also connected to the cavity of the first generator through a connecting pipe, and a first check valve is installed on the connecting pipe between the first heat exchanger and the first generator;

[0013] The second evaporator is connected to the second absorber through an output pipe, the second absorber is connected to the heat exchange coil D in the second heat exchanger, a second solution pump is installed on the connecting pipe between the second absorber and the heat exchange coil D, and the output end of the heat exchange coil D is connected to the cavity of the second generator; the second absorber is also connected to the cavity of the second heat exchanger through a connecting pipe, and a second valve is fixedly installed on the connecting pipe between the second absorber and the second heat exchanger; the second heat exchanger is also connected to the cavity of the second generator through a connecting pipe, and a second check valve is installed on the connecting pipe between the second heat exchanger and the second generator;

[0014] The second generator is also connected to the cavity of the second condenser, the second condenser is also connected to a second output pipe, the end of the second output pipe is arranged at the top of the second evaporator, and the second output pipe is also installed with a second throttle valve.

[0015] Preferably, the circulation process of the heat transfer medium circulation module specifically includes the following contents:

[0016] The heat transfer medium is output from the heat source and first enters the heat exchange coil A in the first generator to heat the low-concentration absorbent in the cavity of the first generator. The refrigerant in the low-concentration absorbent evaporates and enters the first condenser; the cooled heat transfer medium then enters the heat exchange coil B in the second generator to heat the low-concentration absorbent in the second generator. The refrigerant in the low-concentration absorbent evaporates and enters the second condenser. The cooled heat transfer medium enters the cavity of the multi-stage heat exchanger to heat the first heat exchange coil and the second heat exchange coil. After coming out of the multi-stage heat exchanger, the heat transfer medium enters the heat source to be heated.

[0017] Preferably, the circulation process of the tap water circulation module specifically includes the following contents:

[0018] The tap water first exchanges heat with the discharged clean water in the heat exchanger and is heated once; the heated tap water flows out of the heat exchanger and passes through the fifth valve and is divided into two parts, entering the seventh heat exchange coil in the first absorber and the eighth heat exchange coil in the second absorber respectively;

[0019] The tap water entering the seventh heat exchange coil in the first absorber cools down the high-concentration absorbent in the cavity of the first absorber, and the water is heated for the second time; after the cooled absorbent absorbs the refrigerant in the first evaporator, the water enters the fourth heat exchange coil in the first condenser, and the refrigerant vapor in the first condenser condenses, and the released heat heats the water entering the fourth heat exchange coil for the third time; the heated water enters the first heating coil in the multi-stage heat exchanger and is heated for the fourth time to form high-temperature water; the high-temperature water enters the first spray device in the water purification tower, and the high-temperature water sprayed out in the first spray device is cooled down, and the sprayed high-temperature water exchanges heat and mass with the air before entering the second spray device;

[0020] The tap water entering the eighth heat exchange coil in the low-temperature absorber cools the high-concentration absorbent in the cavity of the second absorber, and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the second evaporator, the water enters the fifth heat exchange coil in the second condenser, and the refrigerant vapor of the second condenser is condensed, and the released heat heats the water entering the fifth heat exchange coil for the third time; the heated water enters the second heating coil in the multi-stage heat exchanger and is heated for the fourth time to form low-temperature water; the low-temperature water enters the second spray device in the water purification tower, and is mixed with the cooled tap water flowing in from the first spray device in the second spray device, and exchanges heat and moisture with the air. The air exchanges heat and moisture, is heated and humidified, and the high-temperature water is cooled. The sprayed low-temperature water is collected by the high-concentration water collection tank, and after circulating through the pipeline, it enters the first absorber and the second absorber again to be heated.

[0021] Preferably, the circulation process of the air circulation module specifically includes the following contents:

[0022] The fan blows the air from top to bottom through the wind duct in the middle of the water purification tower. The air passes through the second spray device and the first spray device from bottom to top in sequence through the wind outlet at the bottom of the water purification tower. It is heated and humidified by water with a lower temperature in the second spray device and heated and humidified by water with a higher temperature in the first spray device. The high-temperature and high-humidity air then enters the ventilation pipe array through the wind outlet. It is first cooled by the second evaporator in the ventilation pipe and then cooled again by the first evaporator. The ventilation wind runs through the second evaporator and the first evaporator, and multiple winds are provided. Water in the cooled humid air condenses and falls into the clean water collection tank. The cooled air is driven by the fan for the next cycle.

[0023] Preferably, the circulation process of the water purification circulation module specifically includes the following contents:

[0024] The condensed water falls onto the condensed water baffle and drips into the clean water collection tank. The water in the clean water collection tank is discharged after being heated by the heat exchanger through a pipeline. In the process of generating clean water, the concentration of the sprayed high-temperature water becomes higher and higher, so the water collected in the high-concentration water collection tank becomes high-concentration water. In order to prevent the water concentration from being too high, it is drained regularly through the fourth valve and then replenished through the fifth valve.

[0025] Preferably, the circulation process of the water purification circulation module specifically includes the following contents:

[0026] The heat transfer medium from the heat source enters the first generator, where the low-concentration solution is heated, the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution; the refrigerant vapor enters the first condenser, is cooled into a refrigerant liquid by the water on the outside of the first heat exchange coil, and then enters the first evaporator after being depressurized by the first throttle valve, where the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe; the high-concentration liquid in the first generator enters the first absorber after being cooled by the first heat exchanger, where the high-concentration liquid absorbs the refrigerant vapor in the first evaporator and releases heat, and heats the water in the seventh heat exchange coil; the high-concentration solution in the first absorber becomes a low-concentration solution again, and is sent to the first generator for continuous circulation after entering the first heat exchanger through the first solution pump;

[0027] The heat transfer medium after heating the low-concentration solution in the first generator enters the second generator, and the low-concentration solution is heated in the second generator, and the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution; the refrigerant vapor enters the second condenser, and is cooled into a refrigerant liquid by the water on the outside of the fifth heat exchange coil, and then enters the second evaporator after being reduced in pressure by the second throttle valve, and the liquid refrigerant evaporates in the second evaporator and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe; the high-concentration liquid in the second generator is cooled by the second heat exchanger and enters the second absorber, and in the second absorber, the high-concentration liquid absorbs the refrigerant vapor in the second evaporator and releases heat, and heats the water in the eighth heat exchange coil; the high-concentration solution in the second absorber becomes a low-concentration solution again, and is sent to the second generator for continuous circulation after entering the second heat exchanger through the second solution pump.

[0028] Beneficial effects:

[0029] The present invention proposes a multi-stage absorption humidification condensation water purification system, including a heat transfer medium circulation module, a tap water circulation module, an air circulation module, a water purification circulation module and a refrigeration circulation module, which can make full use of solar energy, waste heat, residual heat, etc. to produce pure drinking water through water. The system can make full use of heat in a cascade through a multi-stage design, greatly improving the water production efficiency of the system. In addition, the system uses air as a water treatment medium, with very little water waste, which can greatly improve the utilization rate of water. The system is combined with solar energy and is suitable for use in hotels, residential areas and other places suitable for centralized supply of drinking water.

[0030] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the attached picture:

[0032] Figure 1This is a schematic diagram of the structure of the multi-stage absorption humidification condensation water purification system proposed in Example 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the three-level structure of the extended application of the water purification system proposed in Example 2 of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1a, first generator; 1b, second generator; 1c, third generator; 2a, first absorber; 2b, second absorber; 2c, third absorber; 3a, first heat exchanger; 3b, second heat exchanger; 3c, third heat exchanger; 4, water purification tower; 5a, first condenser; 5b, second condenser; 5c, third condenser; 6a, first evaporator; 6b, second evaporator; 6c, third evaporator; 7, first air outlet; 8, fan; 9, ventilation pipe; 10a, first throttle valve; 10b, second throttle valve; 10c, third throttle valve; 11, condensate baffle; 12a, first spray device; 12b, second spray device; 12c, third spray device; 13a, first valve; 1 3b, second valve; 13c, third valve; 14, heat exchanger; 15a, first heat exchange coil; 15b, second heat exchange coil; 15c, third heat exchange coil; 16, heat source; 17, clean water collecting tank; 18, water collecting tank; 19a, first solution pump; 19b, second solution pump; 19c, third solution pump; 20, intermediate air duct; 21, second air outlet; 22a, first check valve; 22b, second check valve; 22c, third check valve; 23, fourth valve; 24, multi-stage heat exchanger; 25, fifth valve; 26a, fourth heat exchange coil; 26b, fifth heat exchange coil; 26c, sixth heat exchange coil; 27a, seventh heat exchange coil; 27b, eighth heat exchange coil; 27c, ninth heat exchange coil. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0037] Embodiment 1:

[0038] See also Figure 1 The present invention provides a multi-stage absorption humidification condensation water purification system, which mainly includes heat transfer medium circulation, tap water circulation, air circulation, water purification circulation and refrigeration circulation. The specific operating principle is as follows.

[0039] (1) Heat transfer medium cycle of heat source:

[0040] The heat transfer medium coming out of the heat source 16 first enters the first generator 1a (high temperature generator) to heat the low concentration absorbent in the generator, and the refrigerant in the low concentration absorbent evaporates and enters the first condenser 5a (high temperature condenser). The low-temperature heat transfer medium after cooling enters the second generator 1b (low temperature generator) to heat the low concentration absorbent in the second generator 1b (low temperature generator). The refrigerant in the low concentration absorbent evaporates and enters the second condenser 5b (low temperature condenser). The heat transfer medium after cooling enters the multi-stage heat exchanger 24, first heats the first heat exchange coil 15a (high temperature heat exchange coil), and then heats the second heat exchange coil 15b (low temperature heat exchange coil). After coming out of the multi-stage heat exchanger 24, the heat transfer medium enters the heat source 16 to be heated.

[0041] (2) Tap water circulation

[0042] The tap water first exchanges heat with the discharged clean water in the heat exchanger 14 and is heated once, then flows out of the heat exchanger 14 and passes through the fifth valve 25 (water supply valve) and is divided into two parts, entering the first absorber 2a (high-temperature absorber) and the second absorber 2b (low-temperature absorber) respectively.

[0043] A portion of the water enters the first absorber 2a (high temperature absorber) to cool the high concentration absorbent in the first absorber 2a (high temperature absorber), and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the first evaporator 6a (high temperature evaporator), the water enters the first condenser 5a (high temperature condenser). The refrigerant vapor in the first condenser 5a (high temperature condenser) condenses, and the released heat heats the water entering the first condenser 5a (high temperature condenser) for the third time. The heated water enters the first heat exchange coil 15a (high temperature heating coil) in the multi-stage heat exchanger 24 and is heated for the fourth time to form high temperature water. The high temperature water enters the water purification tower 4 and enters the first spray device 12a (high temperature spray device). The high temperature water sprayed out in the first spray device 12a (high temperature spray device) is cooled. The sprayed high temperature water exchanges heat and mass with the air and enters the second spray device 12b (low temperature spray device).

[0044] A part of the water enters the second absorber 2b (low-temperature absorber) to cool the high-concentration absorbent in the second absorber 2b (low-temperature absorber), and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the second evaporator 6b (low-temperature evaporator), the water enters the second condenser 5b (low-temperature condenser). The refrigerant vapor in the second condenser 5b (low-temperature condenser) is condensed, and the released heat heats the water entering the second condenser 5b (low-temperature condenser) for the third time. The heated water enters the second heating coil 15b (low-temperature heating coil) in the multi-stage heat exchanger 24 and is heated for the fourth time to form low-temperature water. The low-temperature water enters the water purification tower 4, enters the second spray device 12b (low-temperature spray device), and is mixed with the cooled water flowing in from the first spray device 12a (high-temperature spray device) in the second spray device 12b (low-temperature spray device). And heat and moisture are exchanged with the air. The air is heated and humidified, and the high-temperature water is cooled down. The sprayed low-temperature water is collected by the high-concentration water collection tank 18, and after circulating through the pipeline, it enters the first absorber 2a (high-temperature absorber) and the second absorber 2b (low-temperature absorber) again to be heated.

[0045] (3) Air circulation

[0046] The fan 8 blows the air from top to bottom through the air duct 20 in the middle of the water purification tower 4. There is an air outlet 21 at the bottom. The air passes through the second spray device 12b (low-temperature spray device) and the first spray device 12a (high-temperature spray device) from bottom to top through the air outlet 21. It is heated and humidified by water with a lower temperature in the second spray device 12b (low-temperature spray device) and heated and humidified by water with a higher temperature in the first spray device 12a (high-temperature spray device). The high-temperature and high-humidity air then enters the ventilation pipe 9 array through the air outlet 7. It is first cooled by the second evaporator 6b (low-temperature evaporator) in the ventilation pipe 9, and then cooled again by the first evaporator 6a (high-temperature evaporator). The ventilation pipe 9 runs through the second evaporator 6b (low-temperature evaporator) and the first evaporator 6a (high-temperature evaporator), and is provided with multiple roots. Water in the cooled humid air condenses and falls into the clean water collection tank 17. The cooled air is driven by the fan 8 for the next cycle.

[0047] (4) Water purification cycle

[0048] The condensed water falls on the condensed water baffle 11 and drips into the clean water collection tank 17. The water in the clean water collection tank 17 is discharged after being heated by the heat exchanger 14 through the pipeline. In the process of generating clean water, the concentration of the sprayed high-temperature water will become higher and higher, so the water collected in the high-concentration water collection tank 18 will become high-concentration water. In order to prevent the water concentration from being too high, the fourth valve 23 (high-concentration water stop valve) is regularly drained, and then the fifth valve 25 (water replenishment stop valve) is used for water replenishment.

[0049] (5) Refrigeration cycle

[0050] The heat transfer medium from the heat source 16 enters the heat exchange coil A in the first generator 1a (high temperature generator), heats the low-concentration solution in the cavity of the first generator 1a (high temperature generator), and makes most of the low-boiling-point refrigerant in the solution evaporate, and the low-concentration solution becomes a high-concentration solution. The refrigerant vapor enters the first condenser 5a (high temperature condenser), is cooled into refrigerant liquid by the water outside the fourth heat exchange coil 26a, and then enters the first evaporator 6a (high temperature evaporator) after being depressurized by the first throttle valve 10a. In the first evaporator 6a (high temperature evaporator), the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe. The high-concentration liquid in the first generator 1a (high temperature generator) enters the first absorber 2a (high temperature absorber) after being cooled by the first heat exchanger 3a. In the first absorber 2a (high temperature absorber), the high-concentration liquid absorbs the refrigerant vapor in the first evaporator 6a (high temperature evaporator) and releases heat, and heats the water in the seventh heat exchange coil 27a. The high-concentration solution in the first absorber 2a (high-temperature absorber) becomes a low-concentration solution again, enters the first heat exchanger 3a through the first solution pump 19a, and is sent to the first generator 1a (high-temperature generator) to continue circulating.

[0051] The heat transfer medium enters the heat exchange coil B in the second generator 1b (low-temperature generator), heats the low-concentration solution in the cavity of the second generator 1b (low-temperature generator), and makes most of the low-boiling-point refrigerant in the solution evaporate, and the low-concentration solution becomes a high-concentration solution. The refrigerant vapor enters the second condenser 5b (low-temperature condenser), is cooled into refrigerant liquid by the water outside the fifth heat exchange coil 26b, and then enters the second evaporator 6b (low-temperature evaporator) after being depressurized by the second throttle valve 10b. In the second evaporator 6b (low-temperature evaporator), the liquid refrigerant evaporates and absorbs the heat in the high-temperature and high-humidity air in the ventilation pipe 9. The high-concentration liquid in the second generator 1b (low-temperature generator) enters the second absorber 2b (low-temperature absorber) after being cooled by the second heat exchanger 3b. In the second absorber 2b (low-temperature absorber), the high-concentration liquid absorbs the refrigerant vapor in the second evaporator 6b (low-temperature evaporator) and releases heat, and the water in the eighth heat exchange coil 27b. The high-concentration solution in the second absorber 2b (low-temperature absorber) becomes a low-concentration solution again, enters the second heat exchanger 3b through the second solution pump 19b, and is sent to the second generator 1b (low-temperature generator) to continue circulating.

[0052] Embodiment 2:

[0053] Based on Example 1, but different in that the present invention extends the design based on the system proposed in Example 1 and proposes the following Figure 2 Another form of water purification system shown, the three-stage system operating principle is as follows:

[0054] (1) Heat transfer medium cycle of heat source:

[0055] The heat transfer medium coming out of the heat source 16 first enters the first generator 1a (high temperature generator) to heat the low concentration absorbent in the generator, and the refrigerant in the low concentration absorbent evaporates and enters the first condenser 5a (high temperature condenser). The low temperature heat transfer medium after the first cooling enters the second generator 1b (medium temperature generator) to heat the low concentration absorbent in the second generator 1b (medium temperature generator). The refrigerant in the low concentration absorbent evaporates and enters the second condenser 5b (medium temperature condenser). The low temperature heat transfer medium after the second cooling enters The third generator 1c (low-temperature generator) heats the low-concentration absorbent in the third generator 1c (low-temperature generator), and the refrigerant in the low-concentration absorbent evaporates and enters the third condenser 5c (low-temperature condenser). The cooled heat transfer medium enters the multi-stage heat exchanger, first heating the first heat exchange coil 15a (high-temperature heat exchange coil), then heating the second heat exchange coil 15b (medium-temperature heat exchange coil), and then heating the third heat exchange coil 15c (low-temperature heat exchange coil). After coming out of the multi-stage heat exchanger 24, the heat transfer medium enters the heat source 16 to be heated.

[0056] (2) Tap water circulation

[0057] The tap water first exchanges heat with the discharged clean water in the heat exchanger 14 and is heated once. Then, it flows out of the heat exchanger 14 and passes through the fifth valve 25 (water supply valve) and is divided into three parts, entering the first absorber 2a (high-temperature absorber), the second absorber 2b (medium-temperature absorber) and the third absorber 2c (low-temperature absorber) respectively.

[0058] A portion of the water enters the first absorber 2a (high temperature absorber) to cool the high concentration absorbent in the first absorber 2a (high temperature absorber), and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the first evaporator 6a (high temperature evaporator), the water enters the first condenser 5a (high temperature condenser). The refrigerant vapor in the first condenser 5a (high temperature condenser) condenses, and the released heat heats the water entering the first condenser 5a (high temperature condenser) for the third time. The heated water enters the first heating coil 15a (high temperature heating coil) in the multi-stage heat exchanger 24 and is heated for the fourth time to form high temperature water. The high temperature water enters the water purification tower 4 and enters the first spray device 12a (high temperature spray device). The high temperature water sprayed out in the first spray device 12a (high temperature spray device) is cooled. The sprayed high temperature water exchanges heat and mass with the air and enters the second spray device 12b (medium temperature spray device).

[0059] A portion of the water enters the second absorber 2b (medium-temperature absorber) to cool the high-concentration absorbent in the second absorber 2b (medium-temperature absorber), and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the medium-temperature evaporator 6b, the water enters the second condenser 5b (medium-temperature condenser). The refrigerant vapor in the second condenser 5b (medium-temperature condenser) is condensed, and the released heat heats the water entering the second condenser 5b (medium-temperature condenser) for the third time. The heated water enters the second heating coil 15b (medium-temperature heating coil) in the multi-stage heat exchanger 24 and is heated for the fourth time to form medium-temperature water. The medium-temperature water enters the water purification tower 4, enters the second spray device 12b (medium-temperature spray device), and is mixed with the cooled water flowing in from 12a in the second spray device 12b (medium-temperature spray device). The sprayed mixed water exchanges heat and mass with the air and enters 12c.

[0060] A portion of the water enters the third absorber 2c (low-temperature absorber) to cool the high-concentration absorbent in the third absorber 2c (low-temperature absorber), and the water is heated for the second time. After the cooled absorbent absorbs the refrigerant in the low-temperature evaporator 6c, the water enters the third condenser 5c (low-temperature condenser). The refrigerant vapor in the third condenser 5c (low-temperature condenser) condenses, and the released heat heats the water entering the third condenser 5c (low-temperature condenser) for the third time. The heated water enters the third heating coil 15c (low-temperature heating coil) in the multi-stage heat exchanger 24 and is heated for the fourth time to form low-temperature water. The low-temperature water enters the water purification tower 4, enters the third spray device 12c (low-temperature spray device), and is mixed again with the cooled water flowing in from the third spray device 12c (low-temperature spray device) in the third spray device 12c (low-temperature spray device). And heat and moisture exchange is carried out with the air. The air is heated and humidified, and the high-temperature water is cooled down. The sprayed low-temperature water is collected by the high-concentration water collection tank 18, and after circulating through the pipeline, it enters the first absorber 2a (high-temperature absorber), the second absorber 2b (medium-temperature absorber) and the third absorber 2c (low-temperature absorber) to be heated again.

[0061] (3) Air circulation

[0062] The fan 8 blows the air from top to bottom through the air duct 20 in the middle of the water purification tower 4. There is an air outlet 21 at the bottom. The air passes through the third spray device 12c (low-temperature spray device), the second spray device 12b (medium-temperature spray device) and the first spray device 12a (high-temperature spray device) from bottom to top through the air outlet 21. The air is heated and humidified by water with a lower temperature in the third spray device 12c (low-temperature spray device), heated and humidified by water with a higher temperature in the second spray device 12b (medium-temperature spray device), and heated and humidified by water with the highest temperature in the first spray device 12a (high-temperature spray device). The high-temperature and high-humidity air then enters the ventilation pipe 9 array through the air outlet 7, and is first cooled by the third evaporator 6c (low-temperature evaporator) in the ventilation pipe 9, and then cooled again by the second evaporator 6b (medium-temperature evaporator), and finally cooled again by the first evaporator 6a (high-temperature evaporator). The ventilation duct 9 runs through the third evaporator 6c (low-temperature evaporator), the second evaporator 6b (medium-temperature evaporator) and the first evaporator 6a (high-temperature evaporator), and is provided with multiple roots. Water in the cooled humid air condenses and falls into the clean water collection tank 17, and the cooled air is driven by the fan 8 for the next circulation.

[0063] (4) Water purification cycle

[0064] The condensed water falls on the condensed water baffle 11 and drips into the clean water collection tank 17. The water in the clean water collection tank 17 is discharged after being heated by the heat exchanger 14 through the pipeline. In the process of generating clean water, the concentration of the sprayed high-temperature water will become higher and higher, so the water collected in the high-concentration water collection tank 18 will become high-concentration water. In order to prevent the water concentration from being too high, the third valve 23 (high-concentration water stop valve) is regularly used for drainage, and then the fifth valve 25 (water supply stop valve) is used for water replenishment.

[0065] (5) Refrigeration cycle

[0066] The heat transfer medium from the heat source 16 enters the first generator 1a (high temperature generator), in which the low concentration solution is heated, the low boiling point refrigerant in the solution evaporates, and the low concentration solution becomes a high concentration solution; the refrigerant vapor enters the first condenser 5a (high temperature condenser), is cooled into refrigerant liquid by the water outside the first heat exchange coil 26a, and then enters the first evaporator 6a (high temperature evaporator) after being reduced in pressure by the first throttle valve 10a, in which the liquid refrigerant evaporates and absorbs the high temperature and high humidity air in the ventilation pipe 9 The heat in the first generator 1a (high temperature generator); the high-concentration liquid in the first generator 1a (high temperature generator) is cooled by the first heat exchanger 3a and enters the first absorber 2a (high temperature absorber). In the first absorber 2a (high temperature absorber), the high-concentration liquid absorbs the refrigerant vapor in the first evaporator 6a (high temperature evaporator) and releases heat, and heats the water in the seventh heat exchange coil 27a; the high-concentration solution in the first absorber 2a (high temperature absorber) is converted into a low-concentration solution again, enters the first heat exchanger 3a through the first solution pump 19a, and is sent to the first generator 1a (high temperature generator) to continue circulating.

[0067] The heat transfer medium enters the second generator 1b (medium temperature generator), where the low-concentration solution is heated, most of the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution. The refrigerant vapor enters the second condenser 5b (medium temperature condenser), is cooled into refrigerant liquid by the water outside the fifth heat exchange coil 26b, and then enters the second evaporator 6b (medium temperature evaporator) after being depressurized by the second throttle valve 10b. In the second evaporator 6b (medium temperature evaporator), the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe. The high-concentration liquid in the second generator 1b (medium temperature generator) enters the second absorber 2b (medium temperature absorber) after being cooled by the second heat exchanger 3b. In the second absorber 2b (medium temperature absorber), the high-concentration liquid absorbs the refrigerant vapor in the second evaporator 6b (medium temperature evaporator) and releases heat, and heats the water in the eighth heat exchange coil 27b. The high-concentration solution in the second absorber 2b (medium-temperature absorber) becomes a low-concentration solution again, enters the second heat exchanger 3b (medium-temperature heat exchanger) through the second solution pump 19b, and is then sent to the second generator 1b (medium-temperature generator) to continue circulating.

[0068] The heat transfer medium enters the third generator 1c (low-temperature generator) again, where the low-concentration solution is heated, and most of the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution. The refrigerant vapor enters the third condenser 5c (low-temperature condenser), is cooled into refrigerant liquid by the water outside the ninth heat exchange coil 27c, and then enters the third evaporator 6c (low-temperature evaporator) after being depressurized by the third throttle valve 10c. In the third evaporator 6c (low-temperature evaporator), the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe. The high-concentration liquid in the third generator 1c (low-temperature generator) enters the third absorber 2c (low-temperature absorber) after being cooled by the third heat exchanger 3c. In the third absorber 2c (low-temperature absorber), the high-concentration liquid absorbs the refrigerant vapor in the third evaporator 6c (low-temperature evaporator) and releases heat, and heats the water in the third heat exchange coil 27c. The high-concentration solution in the absorber becomes a low-concentration solution again, enters the third heat exchanger 3c through the third solution pump 19c, and is sent to the third generator 1c (low-temperature generator) to continue circulating.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-stage absorption humidification condensation water purification system, characterized in that: It includes a heat transfer medium circulation module, a tap water circulation module, an air circulation module, a water purification circulation module and a refrigeration circulation module; The heat transfer medium circulation module comprises a heat source (16), the heat source (16) is connected to a heat exchange coil A in a first generator (1a), the output end of the heat exchange coil A is connected to a heat exchange coil B in a second generator (1b), the output end of the heat exchange coil B is connected to a cavity in a multi-stage heat exchanger (24), and the output end of the multi-stage heat exchanger (24) is also connected to the heat source (16); The tap water circulation module comprises a heat exchanger (14), the heat exchanger (14) being connected to a water replenishment valve (25), the water replenishment valve (25) being respectively connected to a seventh heat exchange coil (27a) in the first absorber (2a) and an eighth heat exchange coil (27b) in the second absorber (2b); the output end of the seventh heat exchange coil (27a) being connected to a fourth heat exchange coil (26a) in the first condenser (5a), the output end of the fourth heat exchange coil (26a) being connected to a first heat exchange coil (15a) in the multi-stage heat exchanger (24), and the output end of the first heat exchange coil (15a) being connected to a first spray device (12a) in a water purification tower (4); The output end of the eighth heat exchange coil (27b) is connected to the fifth heat exchange coil (26b) in the second condenser (5b), and the output end of the fifth heat exchange coil (26b) is connected to the second heat exchange coil (15b) in the multi-stage heat exchanger (24); the output end of the second heat exchange coil (15b) is connected to the second spray device (12b) in the water purification tower (4); a water collecting tank (18) is provided at the bottom of the water purification tower (4), and the water collecting tank (18) is further connected to the seventh heat exchange coil (27a) in the first absorber (2a) and the eighth heat exchange coil (27b) in the second absorber (2b) through a circulation pipeline; The air circulation module comprises a fan (8), the fan (8) is fixedly mounted on the top of a water purification tower (4), an air duct (20) is arranged inside the water purification tower (4), and an air outlet (21) is arranged at the bottom of the air duct (20); a first evaporator (6a) and a second evaporator (6b) are arranged from top to bottom on the upper end of the water purification tower (4), and an array of ventilation pipes (9) are arranged inside the first evaporator (6a) and the second evaporator (6b); a clean water collection tank (17) is also connected to the inner wall of the water purification tower (4), and an air outlet (7) is arranged between the clean water collection tank (17) and the air duct (20); The clean water circulation module comprises a condensation baffle (11), which is arranged below the first evaporator (6a) and the second evaporator (6b) and fixedly connected to the side wall of the air duct (20); and also comprises a clean water collecting tank (17), which is arranged below the condensation baffle (11) and fixedly connected to the inner wall of the water purification tower (4); a water outlet is arranged at the lower end of the clean water collecting tank (17), and the water outlet is connected to the heat exchange coil in the heat exchanger (14) through a connecting pipe to output clean water; In the refrigeration cycle module, the refrigerant is stored in the cavity of the first generator (1a); the first generator (1a) is connected to the cavity of the first condenser (5a); the first condenser (5a) is connected to a first output pipe, the end of the first output pipe is arranged at the top of the first evaporator (6a), and the first output pipe is also installed with a first throttle valve (10a); the lower end of the first evaporator (6a) is also connected to the cavity of the first absorber (2a), and the first absorber (2a) is further connected to the heat exchange coil C in the first heat exchanger (3a), and the first absorber (2a) and the heat exchange coil C are connected to each other. A first solution pump (19a) is installed on the connecting pipe between the tubes C, and the output end of the heat exchange coil C is connected to the cavity of the first generator (1a); the first absorber (2a) is also connected to the cavity of the first heat exchanger (3a) through the connecting pipe, and a first valve (13a) is fixedly installed on the connecting pipe between the first absorber (2a) and the first heat exchanger (3a); the first heat exchanger (3a) is also connected to the cavity of the first generator (1a) through the connecting pipe, and a first check valve (22a) is installed on the connecting pipe between the first heat exchanger (3a) and the first generator (1a); The second evaporator (6b) is connected to the second absorber (2b) through an output pipe, the second absorber (2b) is connected to the heat exchange coil D in the second heat exchanger (3b), a second solution pump (19b) is installed on the connecting pipe between the second absorber (2b) and the heat exchange coil D, and the output end of the heat exchange coil D is connected to the cavity of the second generator (1b); the second absorber (2b) is also connected to the cavity of the second heat exchanger (3b) through the connecting pipe, and a second valve (13b) is fixedly installed on the connecting pipe between the second absorber (2b) and the second heat exchanger (3b); the second heat exchanger (3b) is also connected to the cavity of the second generator (1b) through the connecting pipe, and a second check valve (22b) is installed on the connecting pipe between the second heat exchanger (3b) and the second generator (1b); The second generator (1b) is also connected to the cavity of the second condenser (5b), the second condenser (5b) is also connected to a second output pipe, the end of the second output pipe is arranged at the top of the second evaporator (6b), and the second output pipe is also installed with a second throttle valve (10b).

2. A multi-stage absorption humidification condensation water purification system according to claim 1, characterized in that: The circulation process of the heat transfer medium circulation module specifically includes the following contents: The heat transfer medium is output from the heat source (16) and first enters the heat exchange coil A in the first generator (1a), heats the low-concentration absorbent in the cavity of the first generator (1a), and the refrigerant in the low-concentration absorbent evaporates and enters the first condenser (5a); the heat transfer medium after cooling enters the heat exchange coil B in the second generator (1b), heats the low-concentration absorbent in the second generator (1b), and the refrigerant in the low-concentration absorbent evaporates and enters the second condenser (5b); the heat transfer medium after cooling enters the cavity of the multi-stage heat exchanger (24), heats the first heat exchange coil (15a) and the second heat exchange coil (15b), and the heat transfer medium exits the multi-stage heat exchanger (24) and enters the heat source (16) to be heated.

3. A multi-stage absorption humidification condensation water purification system according to claim 1, characterized in that: The circulation process of the tap water circulation module specifically includes the following contents: The tap water first exchanges heat with the discharged clean water in the heat exchanger (14) and is heated once; the heated tap water flows out of the heat exchanger (14) and passes through the fifth valve (25) and is divided into two parts, respectively entering the seventh heat exchange coil (27a) in the first absorber (2a) and the eighth heat exchange coil (27b) in the second absorber (2b); The tap water entering the seventh heat exchange coil (27a) in the first absorber (2a) cools down the high-concentration absorbent in the cavity of the first absorber (2a), and the water is heated for the second time; after the cooled absorbent absorbs the refrigerant in the first evaporator (6a), the water enters the fourth heat exchange coil (26a) in the first condenser (5a), and the refrigerant vapor in the first condenser (5a) is condensed, and the released heat heats the water entering the fourth heat exchange coil (26a) for the third time; the heated water enters the first heating coil (15a) in the multi-stage heat exchanger (24) and is heated for the fourth time to form high-temperature water; the high-temperature water enters the first spray device (12a) in the water purification tower (4), and the high-temperature water sprayed out in the first spray device (12a) is cooled, and the sprayed high-temperature water exchanges heat and mass with the air before entering the second spray device (12b); The tap water entering the eighth heat exchange coil (27b) in the low-temperature absorber (2b) cools the high-concentration absorbent in the cavity of the second absorber (2b), and the water is heated for a second time. After the cooled absorbent absorbs the refrigerant in the second evaporator (6b), the water enters the fifth heat exchange coil (26b) in the second condenser (5b). The refrigerant vapor in the second condenser (5b) condenses, and the released heat heats the water entering the fifth heat exchange coil (26b) for a third time. The heated water enters the second heating coil (26b) in the multi-stage heat exchanger (24). The coil (15b) is heated four times to form low-temperature water; the low-temperature water enters the second spray device (12b) in the water purification tower (4), is mixed with the cooled tap water flowing in from the first spray device (12a) in the second spray device (12b), and undergoes heat and moisture exchange with the air. The air undergoes heat and moisture exchange, the air is heated and humidified, and the high-temperature water is cooled. The sprayed low-temperature water is collected by a high-concentration water collection tank (18), and after circulating through the pipeline, enters the first absorber (2a) and the second absorber (2b) again to be heated.

4. A multi-stage absorption humidification condensation water purification system according to claim 1, characterized in that: The circulation process of the air circulation module specifically includes the following contents: The fan (8) blows air from top to bottom through the air duct (20) in the middle of the water purification tower (4). The air passes through the air outlet (21) at the bottom of the water purification tower (4) and passes through the second spray device (12b) and the first spray device (12a) from bottom to top in sequence. The air is heated and humidified by water with a lower temperature in the second spray device (12b) and heated and humidified by water with a higher temperature in the first spray device (12a). The high-temperature and high-humidity air then enters the ventilation pipe (9) array through the air outlet (7). In the ventilation pipe (9), the air is first cooled by the second evaporator (6b) and then cooled again by the first evaporator (6a). The ventilation wind (9) passes through the second evaporator (6b) and the first evaporator (6a) and is provided with a plurality of wind pipes. Water in the cooled humid air condenses and falls into the clean water collection tank (17). The cooled air is driven by the fan (8) for the next circulation.

5. A multi-stage absorption humidification condensation water purification system according to claim 1, characterized in that: The circulation process of the water purification circulation module specifically includes the following contents: The condensed water falls onto the condensed water baffle (11) and drips into the clean water collection tank (17). The water in the clean water collection tank (17) is discharged after being heated by the heat exchanger (14) through a pipeline. In the process of generating clean water, the concentration of the sprayed high-temperature water becomes higher and higher, so the water collected in the high-concentration water collection tank (18) becomes high-concentration water. In order to prevent the water concentration from being too high, the water is drained regularly through the fourth valve (23) and then replenished through the fifth valve (25).

6. A multi-stage absorption humidification condensation water purification system according to claim 1, characterized in that: The circulation process of the water purification circulation module specifically includes the following contents: The heat transfer medium from the heat source (16) enters the first generator (1a), in which the low-concentration solution is heated, the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution; The refrigerant vapor enters the first condenser (5a), is cooled by the water outside the first heat exchange coil (26a) into a refrigerant liquid, and then enters the first evaporator (6a) after the pressure is reduced by the first throttle valve (10a). In the first evaporator (6a), the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe (9); the high-concentration liquid in the first generator (1a) is cooled by the first heat exchanger (3a) and enters the first absorber (2a). In the first absorber (2a), the high-concentration liquid absorbs the refrigerant vapor in the first evaporator (6a) and releases heat, and heats the water in the seventh heat exchange coil (27a); the high-concentration solution in the first absorber (2a) is converted into a low-concentration solution again, enters the first heat exchanger (3a) through the first solution pump (19a), and is then sent to the first generator (1a) for continued circulation; The heat transfer medium enters the second generator (1b), the low-concentration solution is heated in the second generator (1b), the low-boiling-point refrigerant in the solution evaporates, and the low-concentration solution becomes a high-concentration solution; The refrigerant vapor enters the second condenser (5b), is cooled by the water on the outside of the fifth heat exchange coil (26b) into a refrigerant liquid, and then enters the second evaporator (6b) after the pressure is reduced by the second throttle valve (10b). In the second evaporator (6b), the liquid refrigerant evaporates and absorbs heat from the high-temperature and high-humidity air in the ventilation pipe; the high-concentration liquid in the second generator (1b) is cooled by the second heat exchanger (3b) and enters the second absorber (2b). In the second absorber (2b), the high-concentration liquid absorbs the refrigerant vapor in the second evaporator (6b) and releases heat, and heats the water in the eighth heat exchange coil (27b); the high-concentration solution in the second absorber (2b) becomes a low-concentration solution again, enters the second heat exchanger (3b) through the second solution pump (19b), and is then sent to the second generator (1b) to continue circulating.

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