CN202328897U - Multifunctional device for refrigerating, dehumidifying and heating - Google Patents

Abstract

The utility model discloses a multifunctional device for refrigeration, dehumidification and heating, which belongs to the range of energy comprehensive utilization devices. The multifunctional device for refrigeration, dehumidification and heating is composed of a refrigeration or low-temperature waste heat recovery system, a dehumidification solution regeneration device, a low-temperature flue gas waste heat depth recovery device, and a low-temperature steam waste heat recovery device; wherein the refrigeration or low-temperature waste heat recovery system consists of direct combustion Type absorption unit, water-water heat exchanger, and steam-water heat exchanger SWEX are connected through V1-18 valves and connecting pipes according to the refrigeration and heating processes; they can efficiently use natural gas chemically in accordance with the principle of "temperature matching and cascade utilization" It can improve the comprehensive utilization rate of energy and is mainly used in occasions where cold, heat and humidity loads are relatively concentrated and exist at the same time, such as hospitals, bath centers and hotels. Realize refrigeration, dehumidification and domestic hot water production in summer, and recover low-temperature heat energy such as waste heat from domestic wastewater or solar energy in winter to achieve heating and dehumidification.

Description

A multifunctional device for refrigeration, dehumidification and heating

technical field

The utility model belongs to the range of energy comprehensive utilization devices, in particular to a multifunctional device for cooling, dehumidification and heating. Specifically, it can efficiently utilize the chemical energy of natural gas and improve the comprehensive energy utilization rate according to the principle of "temperature matching and cascade utilization" of natural gas. Bath centers, hotels. the

Background technique

In order to solve the problem of difficult peak shaving in winter and summer of the city's power grid and gas pipeline network, a direct-fired absorption refrigeration/heat pump unit and gas boiler are introduced to meet the needs of cooling and heating loads, and to a certain extent alleviate the peak shaving of the power grid and gas pipeline network pressure. At the same time, the current conventional dehumidification technology generally uses heat pumps to produce 7°C chilled water for dehumidification, and simple cooling does not require chilled water at a low temperature. The lower the temperature of chilled water, the lower the cycle performance COP of the heat pump unit and the lower the energy utilization rate. Generally speaking, the temperature of hot water produced by gas-fired boilers is not high, which violates the thermal energy utilization principle of "temperature matching, volume utilization", and there is a huge loss of useful energy during use. It can be seen that the energy utilization efficiency of the current conventional cooling, dehumidification and hot water production technology is low, and it is necessary to propose new technical solutions and new multi-functional devices to realize the cascade utilization of heat energy. the

At present, combined heat and power technology and distributed energy technology are efficient utilization technologies of natural gas. However, the adoption of combined heat and power or distributed energy technology requires a large initial investment, so it is not suitable for promotion and application in hotels, hospitals, bathing centers and other places with relatively small heating and cooling loads. the

Utility model content

The purpose of this utility model is to solve the fact that the temperature of hot water produced by gas boilers is not high during the utilization of conventional natural gas, which violates the thermal energy utilization principle of "temperature matching and volume utilization", and there is a great loss of useful energy during the use process. As a result, the energy utilization efficiency of conventional cooling, dehumidification and hot water production technology means is relatively low, and a multifunctional device for refrigeration, dehumidification and heating is proposed, wherein the refrigeration, dehumidification and heating The thermal multifunctional device consists of refrigeration or low-temperature waste heat recovery system, dehumidification solution regeneration device, low-temperature flue gas waste heat deep recovery device and low-temperature steam waste heat recovery device, in which the refrigeration or low-temperature waste heat recovery system consists of direct-fired absorption unit, water-water The heat exchanger EX and the steam-water heat exchanger SWEX are connected through V1-18 valves and connecting pipes according to the cooling and heating process; the direct-fired absorption unit is composed of a generator G, a condenser C, a V2 valve, an evaporator E , the absorber A and the solution heat exchanger REX are connected in series to form a loop, and the dehumidification solution regeneration device is composed of the solution generator RG and the liquid chamber of the solution cooler RC connected by connecting pipes, wherein the two ends of the internal gas channel of the solution generator RG are respectively It is connected to the gas channel of generator G and flue gas heat exchanger GWEX; one end of the liquid channel inside the solution cooler RC is connected to the V8 valve, and the other end is connected to the common joint of the V5 valve, V4 valve and the liquid channel in the absorber A. Together; as a low-temperature flue gas waste heat deep recovery device, the flue gas heat exchanger GWEX, one end of the liquid channel is connected to the common joint of the V8 valve, V6 valve, and V7 valve, and the other end is connected through the V11 valve, V10 valve, V12 valve and The hot water outlets of condenser C are connected together; one end of the steam-water heat exchanger SWEX as a low-temperature steam waste heat recovery device is connected to the V7 valve, and the other end is connected to the V10 valve; the left pipe of the first water-water heat exchanger EX1 and V13 Valve, V14 valve series circuit, V13 valve and V14 valve common joint is the tap water inlet; the lower pipe of the second water-water heat exchanger EX2 is connected in series with the right pipe of the first water-water heat exchanger EX1, V17 valve and V18 valve Constitute domestic wastewater treatment loop. the

One end of the liquid channel in the absorber A is connected to the V3 valve and one end of the liquid channel in the condenser C through the V4 valve, and the other end of the liquid channel in the condenser C is the hot water outlet; the other end of the liquid channel in the absorber A is connected to the V3 valve, Common nipple connection for V12 valves. the

One end of the liquid passage in the evaporator E communicates with one end of the upper pipeline of the second water-to-water heat exchanger EX2, and the other end of the two is connected in series by the V1 valve and the water pump P, wherein one end of the V1 valve is connected with the V15 valve as Chilled water outlet, V1 valve is connected with water pump P common port and V16 valve as chilled water inlet. the

The multifunctional device for refrigeration, dehumidification, and heating is composed of a refrigeration or low-temperature waste heat recovery system, a low-temperature flue gas waste heat deep recovery device, and a low-temperature steam waste heat recovery device; wherein, the direct-fired absorption unit consists of a generator G, a condenser C, V2 valve, evaporator E, absorber A and solution heat exchanger REX are connected in series to form a circuit, the channel of absorber A is connected to one end of the liquid channel of solution cooler RC through V19 valve, and connected to V20 valve, V20 valve is for cooling The water inlet control valve, the other end of the liquid channel of the solution cooler RC is connected to the V8 valve, and the outlet water of the V8 valve and the liquid channel of the condenser C is connected as cooling water output; the dehumidification solution regeneration device is composed of the solution generator RG and the solution cooler RC The liquid chamber of the evaporator E is connected by connecting pipes. One end of the liquid channel of the evaporator E is connected to the V16 valve as the chilled water inlet, and the other end of the liquid channel of the evaporator E is the chilled water outlet. the

The multifunctional device for refrigeration, dehumidification, and heating is composed of a refrigeration or low-temperature waste heat recovery system, a low-temperature flue gas waste heat deep recovery device, and a low-temperature steam waste heat recovery device; one end of the liquid channel in the absorber A is connected to the valve V12 valve and the condenser The hot water outlets of C are connected together, and the other end of the liquid channel in absorber A is connected with the common joints of V4 valve, V5 valve and V6 valve; the lower pipe of the second water-water heat exchanger EX2 is connected with the first water-water The right pipeline of the heat exchanger EX1 is connected in series with the V17 valve and the V18 valve to form a domestic wastewater treatment circuit; the two ends of the left pipeline of the first water-to-water heat exchanger EX1 are respectively connected to the V14 valve and the V6 valve, and the common joint of the V14 valve and the V5 valve It is the tap water inlet; the left pipe of the first water-to-water heat exchanger EX1 and the common joint of the V6 valve are connected to one end of the liquid channel of the flue gas heat exchanger GWEX, and the other end of the liquid channel of the flue gas heat exchanger GWEX is connected to the valve The V12 valve and the hot water outlet of condenser C are connected together. the

The multifunctional device for refrigeration, dehumidification, and heating is composed of a refrigeration or low-temperature waste heat recovery system, a dehumidification solution regeneration device, a low-temperature flue gas waste heat depth recovery device, and a low-temperature steam waste heat recovery device; the dehumidification solution regeneration device is composed of a solution generator The liquid chamber of RG and solution cooler RC is connected by a connecting pipe, in which one end of the gas channel inside the solution generator RG and the other end connected to the generator G are low-temperature flue gas outlets; one end of the liquid channel inside the solution cooler RC passes through the V8 valve It is connected with the V valve and the hot water outlet of the condenser C; and the liquid chamber of the solution generator RG is provided with a dilute solution inlet and a water vapor outlet, and the liquid chamber of the solution cooler (RC) is provided with a concentrated solution outlet; the solution cooler RC The other end is connected with the V5 valve, V4 valve and the public joint of the liquid channel in the absorber A; the two ends of the left pipeline of the first water-to-water heat exchanger EX1 are respectively connected with the V14 valve and the V13 valve, and the V14 valve and the V13 valve are connected together. The common joint is the tap water inlet; the V5 valve is connected to the left pipeline of the first water-to-water heat exchanger EX1 and the common joint of the V13 valve; the lower pipeline of the second water-to-water heat exchanger EX2 is connected to the first water-to-water heat exchanger EX1’s The right pipeline, V17 valve and V18 valve are connected in series to form a domestic wastewater treatment loop. the

The beneficial effects of the utility model are mainly reflected in the following aspects: first, the cascade utilization of "energy according to quality" is realized for natural gas, and the comprehensive utilization efficiency of energy is improved; Recycling, improving the energy utilization efficiency and economy of the entire system; third, realizing the dual functions of refrigeration and waste heat recovery to produce hot water for direct-fired absorption units, improving equipment utilization and improving device economy. the

Description of drawings

Figure 1 shows the first system composition and pipeline connection. the

Figure 2 shows the second system composition and pipeline connection. the

Figure 3 shows the third system composition and pipeline connection. the

Figure 4 shows the fourth system composition and pipeline connection. the

Labels in the figure: G-generator; C-condenser; A-absorber; E-evaporator; REX-solution heat exchanger; V-valve; F-burner; P-pump; EX-solution heat exchanger ;SWEX-steam water heat exchanger; GWEX-flue gas heat exchanger; RG-solution generator; RC-concentrated solution cooler;

Detailed ways

The utility model proposes a multifunctional device for refrigeration, dehumidification and heating, which includes four system components and pipeline connection methods shown in Figures 1-4. Below in conjunction with accompanying drawing and embodiment the utility model is further described. the

汽水换热器SWEX通过V1-18阀门、连通管道按照制冷、制热流程连接构成；所述直燃型吸收式机组由发生器G、冷凝器C、V2阀门、蒸发器E、吸收器A和溶液换热器REX串联成回路，所述除湿溶液再生装置由溶液发生器RG和溶液冷却器RC的液体腔由连通管道连接构成，其中溶液发生器RG内部气体通道两端分别和发生器G、烟气换热器GWEX的气体通道连接；溶液冷却器RC内部的液体通道一端和V8阀门连接，另一端和V5阀门、V4阀门及吸收器A内液体通道的公共接头连接在一起；吸收器A内液体通道一端通过V4阀门与V3阀门及冷凝器C内液体通道一端连接，冷凝器C内液体通道另一端为热水出口；吸收器A内液体通道另一端与V3阀门、V12阀门的公共接头连接。作为低温烟气余热深度回收装置的烟气换热器GWEX，其液体通道一端与V8阀门、V6阀门、V7阀门的公共接头连接在一起，另一端通过V11阀门和V10、阀门V12阀门及冷凝器C的热水出口连接在一起；作为低温蒸汽余热回收装置的汽水换热器SWEX一端与V7阀门连接，另一端与V10阀门连接。  As shown in Figure 1, the multifunctional device for refrigeration, dehumidification, and heating is composed of a refrigeration or low-temperature waste heat recovery system, a dehumidification solution regeneration device, a low-temperature flue gas waste heat deep recovery device, and a low-temperature steam waste heat recovery device; The waste heat recovery system consists of a direct-fired absorption unit, a water-to-water heat exchanger

The steam-water heat exchanger SWEX is connected through V1-18 valves and connecting pipes according to the cooling and heating process; the direct-fired absorption unit consists of generator G, condenser C, V2 valve, evaporator E, absorber A and The solution heat exchanger REX is connected in series to form a loop, and the dehumidification solution regeneration device is composed of a solution generator RG and a solution cooler RC. The gas channel connection of the flue gas heat exchanger GWEX; one end of the liquid channel inside the solution cooler RC is connected to the V8 valve, and the other end is connected to the V5 valve, V4 valve and the common joint of the liquid channel in the absorber A; the absorber A One end of the internal liquid channel is connected to the V3 valve and one end of the liquid channel in the condenser C through the V4 valve, and the other end of the liquid channel in the condenser C is the hot water outlet; the other end of the liquid channel in the absorber A is connected to the public joint of the V3 valve and the V12 valve connect. As the flue gas heat exchanger GWEX, which is a deep recovery device for low-temperature flue gas waste heat, one end of its liquid channel is connected to the common joint of V8 valve, V6 valve, and V7 valve, and the other end passes through V11 valve, V10, V12 valve and condenser. The hot water outlets of C are connected together; one end of the steam-water heat exchanger SWEX as a low-temperature steam waste heat recovery device is connected to the V7 valve, and the other end is connected to the V10 valve.

One end of the liquid channel of the evaporator E communicates with one end of the upper pipeline of the second solution heat exchanger REX2, and the other end of the two is connected in series by the V1 valve and the water pump P, wherein one end of the V1 valve is connected with the V15 valve as Chilled water outlet, V1 valve is connected with water pump P common port and V16 valve as chilled water inlet. the

As shown in Figure 2, the direct-fired absorption unit consists of generator G, condenser C, V2 valve, evaporator E, absorber A and solution heat exchanger REX in series to form a circuit, and the liquid channel of absorber A passes through V19 valve and One end of the liquid channel of the solution cooler RC is connected to the V20 valve, the V20 valve is the cooling water inlet control valve, the other end of the liquid channel of the solution cooler RC is connected to the V8 valve, and the V8 valve is connected to the outlet water of the liquid channel of the condenser C , and output cooling water. The dehumidification solution regeneration device is composed of the solution generator RG and the liquid chamber of the solution cooler RC connected by a communication pipe. The dilute solution solution is heated and dehumidified by the hot gas through the generator RG to become a concentrated solution, and then cooled by the solution cooler RC. Drain concentrated solution. One end of the liquid channel of the evaporator E is connected to the V16 valve as the inlet of chilled water, and the other end of the liquid channel of the evaporator E outputs chilled water. the

As shown in Figure 3, it has the same structure as that shown in Figure 1, except that some equipment of the dehumidification solution regeneration device is deleted. Among them, one end of the gas channel inside the solution generator RG and the other end connected to the generator G are low-temperature flue gas outlets; one end of the liquid channel inside the solution cooler RC is connected to the valve V12 valve and the hot water outlet of the condenser C through the V8 valve; In addition, the liquid chamber of the solution generator RG is provided with a dilute solution (lithium bromide) inlet and a water vapor outlet, and the liquid chamber of the solution cooler RC is provided with a concentrated solution (lithium bromide) outlet; the other end of the solution cooler RC is connected to the V5 valve, V4 valve and absorber The common joints of the liquid channels in A are connected together; the two ends of the left pipeline of the first water-to-water heat exchanger EX1 are respectively connected to the V14 valve and the V13 valve, and the common joint of the V14 valve and the V13 valve is the tap water inlet; the V5 valve and the first The left pipeline of the water-to-water heat exchanger EX1 is connected to the common joint of the V13 valve; the lower pipeline of the second water-to-water heat exchanger EX2 is connected in series with the right pipeline of the first water-to-water heat exchanger EX1, and V17 and V18 valves Domestic waste water treatment circuit. the

As shown in Figure 4, the structure is the same as that shown in Figure 1, except that the flue gas heat exchanger GWEX is deleted. Among them, one end of the gas channel inside the solution generator RG is connected to the other end of the generator G as a low-temperature flue gas outlet; one end of the liquid channel inside the solution cooler RC is connected to the valve V valve and the hot water outlet of the condenser C through the V8 valve; In addition, the liquid chamber of the solution generator RG is provided with a dilute solution inlet and a water vapor outlet, and the liquid chamber of the solution cooler RC is provided with a concentrated solution outlet; The joints are connected together; the two ends of the left pipeline of the first water-water heat exchanger EX1 are respectively connected with the V14 valve and the V13 valve, and the common joint of the V14 valve and the V13 valve is the tap water inlet; the V5 valve and the first water-water heat exchanger EX1 The left pipeline of the second water-water heat exchanger EX2 is connected to the public joint of the V13 valve; the lower pipeline of the second water-to-water heat exchanger EX1 is connected in series with the right pipeline of the first water-to-water heat exchanger EX1, the V17 valve, and the V18 valve to form a domestic wastewater treatment circuit. the

The working principle of the utility model is briefly explained as follows: the natural gas in the multifunctional device of refrigeration, dehumidification and heating is ignited in the burner F in the generator G, and the dilute solution from the solution heat exchanger REX is heated; the natural gas flue gas enters again The dehumidification solution generator RG heats the dilute solution in the dehumidification system, and releases heat to cool down; the cooled flue gas enters the flue gas heat exchanger GWEX, the solution generator heats tap water, releases heat and cools down, and discharges it into the atmosphere. the

In the direct-fired absorption unit, the dilute solution (lithium bromide) is heated by natural gas in the generator G to become a concentrated solution (lithium bromide), and the concentrated solution is replaced by the dilute solution from the absorber A in the solution heat exchanger REX After cooling down, it enters the absorber A to absorb the water vapor from the evaporator, turns into a dilute solution, then enters the solution heat exchanger REX, is heated by the concentrated solution, and then enters the generator G, where it is heated by natural gas to generate water vapor Finally, it becomes a concentrated solution, and the solution completes a cycle, and so on. the

In the direct-fired absorption unit, the water vapor from the generator G enters the condenser C and is cooled by the cooling water to become condensed water. Heated and evaporated into water vapor, the water vapor enters the absorber G under the action of pressure difference to be absorbed by the concentrated solution from the solution heat exchanger REX, and the refrigerant water completes a cycle, and so on. the

The refrigerant water evaporates in the evaporator by absorbing the heat of the chilled water, and the chilled water cools down due to heat release, so that the chilled water can be used to achieve refrigeration or recover low-temperature waste heat from domestic wastewater or solar energy. When recovering waste heat, since the temperature of tap water is generally around 15°C and the low-temperature waste heat of domestic waste water is generally above 25°C, the first water-to-water heat exchanger EX1 is used to recover part of the low-temperature waste heat, and then the second water-to-water heat exchanger EX2 The low-temperature chilled water is used to recover part of the low-temperature waste heat. Low-temperature waste heat such as refrigerant water and domestic waste water is exchanged through the intermediate refrigerant—chilled water to realize low-temperature waste heat recovery. the

The dehumidification solution regeneration system is composed of solution generator RG, concentrated solution cooler RC, connecting pipelines and valves and other accessories. The dilute solution is heated by the medium-temperature flue gas in the solution generator RG to generate water vapor to become a concentrated solution, and the concentrated solution is cooled by low-temperature water in the concentrated solution cooler RC. The water vapor generated in the solution generator RG is cooled by low-temperature water in the steam-water heat exchanger SWEX, so as to realize the recovery of steam waste heat. the

The novel refrigeration, dehumidification, and heating multifunctional device of the present invention realizes the functions of refrigeration and hot water heating in this way, realizes deep utilization of the chemical energy of natural gas, and improves the comprehensive utilization efficiency of natural gas. the

Claims (6)

1. A multifunctional device for refrigeration, dehumidification and heating, characterized in that the multifunctional device for refrigeration, dehumidification and heating consists of a refrigeration or low-temperature waste heat recovery system, a dehumidification solution regeneration device, and a deep recovery of low-temperature flue gas waste heat device and a low-temperature steam waste heat recovery device, in which the refrigeration or low-temperature waste heat recovery system consists of a direct-fired absorption unit, a water-water heat exchanger (EX), and a steam-water heat exchanger (SWEX) through the V1-18 valve and connecting pipes according to the refrigeration , heating process connection; the direct-fired absorption unit consists of a generator (G), a condenser (C), a V2 valve, an evaporator (E), an absorber (A) and a solution heat exchanger (REX) In series into a circuit, the dehumidification solution regeneration device is composed of a solution generator (RG) and a liquid chamber of a solution cooler (RC) connected by communication pipes, wherein the two ends of the internal gas channel of the solution generator (RG) are respectively connected to the generator ( G), the connection of the gas channel of the flue gas heat exchanger (GWEX); one end of the liquid channel inside the solution cooler (RC) is connected to the V8 valve, and the other end is connected to the V5 valve, V4 valve and the liquid channel in the absorber (A) The common joints are connected together; as the flue gas heat exchanger (GWEX), which is a deep recovery device for low-temperature flue gas waste heat, one end of the liquid channel is connected to the common joints of the V8 valve, V6 valve, and V7 valve, and the other end is passed through the V11 valve and the common joint of the V7 valve. The V10 valve, V12 valve and the hot water outlet of the condenser (C) are connected together; one end of the steam-water heat exchanger (SWEX) as a low-temperature steam waste heat recovery device is connected to the V7 valve, and the other end is connected to the V10 valve; the first water The left pipeline of the heat exchanger (EX1) is in series with the V13 valve and V14 valve, and the common joint between the V13 valve and V14 valve is the tap water inlet; the lower pipeline of the second water-to-water heat exchanger (EX2) exchanges water with the first water The right pipeline of the heater (EX1) is connected in series with the V17 valve and the V18 valve to form a domestic wastewater treatment circuit. 2. The multifunctional device for refrigeration, dehumidification and heating according to claim 1, characterized in that one end of the liquid channel in the absorber (A) passes through the V4 valve and V3 valve and the liquid channel in the condenser (C) One end is connected, the other end of the liquid channel in the condenser (C) is the hot water outlet; the other end of the liquid channel in the absorber (A) is connected to the common joint of the V3 valve and the V12 valve. the 3. The multifunctional device for refrigeration, dehumidification and heating according to claim 1, characterized in that one end of the liquid channel in the evaporator (E) and the upper pipeline of the second water-to-water heat exchanger (EX2) One end is connected, and the other end of the two is connected in series by the V1 valve and the water pump (P). One end of the V1 valve is connected to the V15 valve as the chilled water outlet, and the V1 valve is connected to the common end of the water pump (P) and the V16 valve for chilled water. import. 4. A multifunctional device for refrigeration, dehumidification and heating, characterized in that the multifunctional device for refrigeration, dehumidification and heating consists of a refrigeration or low-temperature waste heat recovery system, a low-temperature flue gas waste heat depth recovery device and a low-temperature steam waste heat The recovery device is composed of; among them, the direct-fired absorption unit consists of a generator (G), a condenser (C), a V2 valve, an evaporator (E), an absorber (A) and a solution heat exchanger (REX) in series to form a loop , the absorber (A) channel is connected to one end of the liquid channel of the solution cooler (RC) through the V19 valve, and is connected to the V20 valve, the V20 valve is the cooling water inlet control valve, and the other end of the liquid channel of the solution cooler (RC) is connected V8 valve, the outlet water of the liquid channel of the V8 valve and the condenser (C) is connected as cooling water output; the dehumidification solution regeneration device is composed of a liquid chamber of a solution generator (RG) and a solution cooler (RC) connected by a communication pipe, One end of the liquid passage of the evaporator (E) is connected to the V16 valve as the chilled water inlet, and the other end of the liquid passage of the evaporator (E) is the chilled water outlet. 5. A multifunctional device for refrigeration, dehumidification and heating, characterized in that the multifunctional device for refrigeration, dehumidification and heating consists of a refrigeration or low-temperature waste heat recovery system, a low-temperature flue gas waste heat depth recovery device and a low-temperature steam waste heat The recovery device consists of one end of the liquid channel in the absorber (A) connected to the valve V12 valve and the hot water outlet of the condenser (C), and the other end of the liquid channel in the absorber (A) to the V4 valve, V5 valve and V6 valve The common joints of the valves are connected together; the lower pipeline of the second water-to-water heat exchanger (EX2) is connected in series with the right pipeline of the first water-to-water heat exchanger (EX1), V17 valve and V18 valve to form a domestic wastewater treatment circuit; The two ends of the left pipeline of the first water-to-water heat exchanger (EX1) are respectively connected to the V14 valve and the V6 valve, and the common joint of the V14 valve and the V5 valve is the tap water inlet; the left pipeline of the first water-to-water heat exchanger (EX1) and The common joint of the V6 valve is connected to one end of the liquid passage of the flue gas heat exchanger (GWEX), and the other end of the gas passage of the liquid passage of the flue gas heat exchanger (GWEX) is connected to the valve V12 valve and the hot water outlet of the condenser (C) together. 6. A multifunctional device for refrigeration, dehumidification and heating, characterized in that the multifunctional device for refrigeration, dehumidification and heating is composed of a refrigeration or low-temperature waste heat recovery system, a dehumidification solution regeneration device, and a deep recovery of low-temperature flue gas waste heat device and a low-temperature steam waste heat recovery device; the dehumidification solution regeneration device is composed of a liquid chamber of a solution generator (RG) and a solution cooler (RC) connected by a communication pipe, wherein one end of the internal gas channel of the solution generator (RG) and The other end of the generator (G) connection is the low-temperature flue gas outlet; one end of the liquid channel inside the solution cooler (RC) is connected to the V valve and the hot water outlet of the condenser (C) through the V8 valve; and the solution generator ( The liquid chamber of RG) is provided with dilute solution inlet and water vapor outlet, and the liquid chamber of solution cooler (RC) is provided with concentrated solution outlet; the other end of solution cooler (RC) and V5 valve, V4 valve and liquid in absorber (A) The common joints of the channels are connected together; the two ends of the left pipeline of the first water-to-water heat exchanger (EX1) are respectively connected to the V14 valve and the V13 valve, and the common joint of the V14 valve and the V13 valve is the tap water inlet; the V5 valve and the first water The left pipeline of the water heat exchanger (EX1) is connected to the common joint of the V13 valve; the lower pipeline of the second water-water heat exchanger (EX2) is connected to the right pipeline of the first water-water heat exchanger (EX1) and the V17 valve , V18 valves are connected in series to form a domestic wastewater treatment loop. the

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