CN210980422U - Waste heat recycling refrigeration system based on lithium bromide refrigeration - Google Patents

Abstract

The utility model discloses a used heat retrieval and utilization refrigerating system based on lithium bromide refrigeration, including first transfer jar, lithium bromide refrigerating unit, second transfer jar and air conditioner refrigerating unit. The heat medium in the first transfer tank can compensate the input flow, so that the heat medium flow output by the waste heat output pipe is stabilized, and the refrigeration level of the lithium bromide refrigeration unit is stabilized. The output flow of the chilled water compensator in the second transfer tank can be passed through, so that the chilled water flow to the air-conditioning refrigerating unit can be stabilized, and the refrigerating capacity of the air-conditioning refrigerating unit can be stabilized.

Description

Waste heat recycling refrigeration system based on lithium bromide refrigeration

Technical Field

The utility model relates to a refrigerating system technical field especially relates to a used heat recycling refrigerating system based on lithium bromide is cryogenic.

Background

The power plant and other factories generate a large amount of waste heat which cannot be directly used for production in the production process of the factories, and a data center adjacent to the power plant can be communicated with the power plant by using a pipeline to recover the waste heat of the power plant and apply a lithium bromide refrigeration technology to an air conditioning system in the data center. However, the waste heat supply is difficult to stabilize for various reasons, so that the refrigerating capacity of the refrigerating system cannot be guaranteed.

Disclosure of Invention

An object of the utility model is to overcome prior art's not enough, provide a novel structure, usable used heat refrigerates, and the good used heat retrieval and utilization refrigerating system based on lithium bromide refrigeration of stability.

In order to realize the above purpose, the utility model discloses the technical scheme who adopts is:

a waste heat recycling refrigeration system based on lithium bromide refrigeration comprises a first transfer tank, a lithium bromide refrigeration unit, a second transfer tank and an air conditioning refrigeration unit; an inlet of the first transfer tank is connected with a waste heat input pipe, and an outlet of the first transfer tank is connected with a waste heat output pipe; the lithium bromide refrigerating unit comprises a generator, an absorber, a first condenser, a first evaporator, a first suction pump and a first expansion valve, wherein a lithium bromide solution is stored in the generator, the lithium bromide solution is stored in the absorber, the generator and the absorber are in circulating connection through a refrigerant pipe, and the first suction pump is connected between the refrigerant pipe of the generator and the refrigerant pipe of the absorber; the heat exchange tube in the generator is connected with the waste heat output tube, and the heat exchange tube in the absorber is connected with a cooling water tube; the first condenser is connected with an air outlet in the generator through a refrigerant pipe, and is also connected with the cooling water pipe; the first condenser is connected with the first evaporator through a refrigerant pipe, the first expansion valve is arranged between the first condenser and the first evaporator, the first evaporator is also connected with a freezing water pipe, and the first evaporator is connected with an air inlet of the absorber through the refrigerant pipe; the freezing water pipe is connected with a water inlet of the second transfer tank; the air-conditioning refrigerating unit comprises a compressor, a second condenser, a liquid storage tank, a second expansion valve and a second evaporator which are sequentially and circularly connected through a refrigerant pipe, wherein the second evaporator is provided with a fan, a water inlet of the second condenser is connected with a water outlet of a second transfer tank through a pipeline, and a water outlet of the second condenser is connected with a water inlet of a freezing water pipe through a pipeline.

The utility model has the advantages that: the utility model provides a used heat retrieval and utilization refrigerating system includes first transfer jar and second transfer jar, wherein first transfer jar can be used to store the hot medium through the input of used heat input tube, when the hot medium flow of used heat input tube input is more, the hot medium stock of storage increases in the first transfer jar, when the hot medium flow of used heat input tube input is less, the hot medium in the first transfer jar of accessible compensates its input flow, thereby stabilize the hot medium flow of used heat output tube output, thereby the refrigeration level with lithium bromide refrigerating unit is stable.

The refrigerated water that the refrigeration of second transfer jar was used for storing lithium bromide refrigerating unit produced, when the refrigerated water flow of frozen water pipe input was more, the stock of refrigerated water in the second transfer jar increased, and when the refrigerated water flow of frozen water pipe input was less, the refrigerated water compensator export flow in the accessible second transfer jar to stabilize the refrigerated water flow of defeated air conditioner refrigerating unit, thereby stabilize air conditioner refrigerating unit's refrigerating capacity.

Further, a cooling water pipe passes through the absorber and the first condenser in sequence. Because the cooling water firstly absorbs the heat of the absorber and then exchanges heat with the first condenser, the lithium bromide solution of the first condenser can be prevented from being too low in temperature, so that the lithium bromide finally conveyed into the generator can be quickly evaporated, and the consumption of waste heat is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the lithium bromide refrigeration unit of the present invention.

Fig. 3 is a schematic structural diagram of the air conditioning refrigeration unit of the present invention.

The system comprises a first transfer tank 1, a waste heat input pipe 11, a waste heat output pipe 12, a lithium bromide refrigerating unit 2, a generator 21, an absorber 22, a first condenser 23, a first evaporator 24, a first suction pump 25, a first expansion valve 26, a cooling water pipe 27, a second transfer tank 3, an air conditioning refrigerating unit 4, a compressor 41, a second condenser 42, a liquid storage tank 43, a second expansion valve 44, a second evaporator 45, a fan 46 and a cooling water pipe 5.

Detailed Description

The claimed technical solution of the present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 3, the waste heat recycling refrigeration system based on lithium bromide refrigeration in the embodiment includes a first relay tank 1, a lithium bromide refrigeration unit 2, a second relay tank 3, and an air conditioning refrigeration unit 4.

The inlet of the first transfer tank 1 is connected with a waste heat input pipe 11, and the outlet of the first transfer tank 1 is connected with a waste heat output pipe 12.

The lithium bromide refrigerating unit 2 comprises a generator 21, an absorber 22, a first condenser 23, a first evaporator 24, a first suction pump 25 and a first expansion valve 26, wherein a high-concentration lithium bromide solution is stored in the generator 21, a low-concentration lithium bromide solution is stored in the absorber 22, the generator 21 and the absorber 22 are in circulating connection through refrigerant pipes, and the first suction pump 25 is connected between the refrigerant pipes. The heat exchange tube in the generator 21 is connected with the waste heat output tube 12, and the heat exchange tube in the absorber 22 is connected with the cooling water tube 5. The first condenser 23 is connected with an air outlet in the generator 21 through a refrigerant pipe, and meanwhile, the first condenser 23 is also connected with the cooling water pipe 5. The first condenser 23 is connected with the first evaporator 24 through a refrigerant pipe, the first expansion valve 26 is arranged between the first condenser and the first evaporator, meanwhile, the first evaporator 24 is also connected with a chilled water pipe, and the first evaporator 24 is connected with an air inlet of the absorber 22 through a refrigerant pipe; the freezing water pipe is connected with the water inlet of the second transfer tank 3. In this embodiment, the cooling water pipe 5 passes through the absorber 22 and the first condenser 23 in sequence, and since the cooling water absorbs the heat of the absorber 22 and then exchanges heat with the first condenser 23, the temperature of the lithium bromide solution in the first condenser 23 can be prevented from being too low, so that the lithium bromide finally conveyed into the generator 21 can be rapidly evaporated and the consumption of waste heat can be reduced.

The air conditioning and refrigerating unit 4 comprises a compressor 41, a second condenser 42, a liquid storage tank 43, a second expansion valve 44 and a second evaporator 45 which are sequentially and circularly connected through a refrigerant pipe, wherein the second evaporator 45 is provided with a fan 46, a water inlet of the second condenser 42 is connected with a water outlet of the second transfer tank 3 through a pipeline, and a water outlet of the second condenser 42 is connected with a water inlet of a freezing water pipe through a pipeline.

The working principle of the embodiment is as follows:

the waste heat input pipe 11 is connected with a factory building which generates waste heat, such as a power plant, and the like, and the waste heat is conveyed through hot water or steam and other heat mediums, the waste heat firstly enters the first transfer tank 1 for storage and transfer, when the flow of the heat medium input by the waste heat input pipe 11 is large, the heat medium stored in the first transfer tank 1 is increased, and when the flow of the heat medium input by the waste heat input pipe 11 is small, the flow input by the heat medium in the first transfer tank 1 can be compensated, so that the flow of the heat medium output by the waste heat output pipe 12 is stabilized.

The waste heat output pipe 12 outputs heat medium to the generator 21 to exchange heat with the lithium bromide solution in the generator 21, so that water in the lithium bromide solution is evaporated, water vapor enters the refrigerant pipe from the air outlet of the generator 21 and is conveyed to the first condenser 23, and meanwhile, high-concentration lithium bromide solution in the generator 21 enters the absorber 22. The steam in the first condenser 23 is cooled by the cooling water and then condensed to become high-pressure low-temperature liquid water. The high-pressure low-temperature liquid water passes through the expansion valve and then expands and vaporizes in the first evaporator 24 by rapid expansion, so that the temperature in the freezing water pipe in the first evaporator 24 is taken away and reduced to achieve the refrigeration effect. The water vapor in the first evaporator 24 enters the absorber 22 from the air inlet of the absorber 22, and finally the lithium bromide solution in the absorber 22 is pumped into the absorber 22 through the first suction pump 25 to complete the circulation.

When the flow of the chilled water input by the chilled water pipe is large, the stock of the chilled water in the second transfer tank 3 is increased, and when the flow of the chilled water input by the chilled water pipe is small, the flow can be output through the chilled water compensator in the second transfer tank 3, so that the flow of the chilled water to the air-conditioning refrigerating unit 4 is stabilized.

The low-pressure gaseous refrigerant is compressed into the high-pressure gaseous refrigerant under the compression action of the compressor 41, then the refrigerant is conveyed to the second condenser 42 to exchange heat with water in the chilled water pipe to enable the temperature of the water in the chilled water pipe to rise, the temperature of the refrigerant in the second condenser 42 is reduced and the refrigerant is condensed into high-pressure liquid, the high-pressure liquid refrigerant is converted into the low-pressure liquid refrigerant under the action of the expansion valve, then the refrigerant is conveyed to the second-stage evaporator to fully exchange heat with air under the action of the fan 46, the temperature of the air after heat exchange is reduced, meanwhile, the refrigerant absorbs heat and evaporates into low-pressure gaseous refrigerant, and then the refrigerant enters the compressor 41 again to complete one cycle.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way. Those skilled in the art can make further changes and modifications to the invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention. Therefore, the content of the technical scheme of the utility model, according to the equivalent change made by the idea of the utility model, should be covered in the protection scope of the utility model.

Claims (2)

1. The utility model provides a waste heat retrieval and utilization refrigerating system based on lithium bromide refrigeration which characterized in that: the system comprises a first transfer tank (1), a lithium bromide refrigerating unit (2), a second transfer tank (3) and an air-conditioning refrigerating unit (4); an inlet of the first transfer tank (1) is connected with a waste heat input pipe (11), and an outlet of the first transfer tank (1) is connected with a waste heat output pipe (12); the lithium bromide refrigerating unit (2) comprises a generator (21), an absorber (22), a first condenser (23), a first evaporator (24), a first suction pump (25) and a first expansion valve (26), wherein a lithium bromide solution is stored in the generator (21), a lithium bromide solution is stored in the absorber (22), the generator (21) and the absorber (22) are in circulating connection through refrigerant pipes, and the first suction pump (25) is connected between the refrigerant pipes; the heat exchange tube in the generator (21) is connected with the waste heat output tube (12), and the heat exchange tube in the absorber (22) is connected with a cooling water tube (5); the first condenser (23) is connected with an air outlet in the generator (21) through a refrigerant pipe, and meanwhile, the first condenser (23) is also connected with the cooling water pipe (5); the first condenser (23) is connected with the first evaporator (24) through a refrigerant pipe, the first expansion valve (26) is arranged between the first condenser and the first evaporator, meanwhile, the first evaporator (24) is also connected with a chilled water pipe, and the first evaporator (24) is connected with an air inlet of the absorber (22) through a refrigerant pipe; the freezing water pipe is connected with a water inlet of the second transfer tank (3); air conditioning refrigerating unit (4) include compressor (41), second condenser (42), liquid storage pot (43), second expansion valve (44) and second evaporimeter (45) through refrigerant pipe cycle connection in proper order, second evaporimeter (45) dispose fan (46), the water inlet of second condenser (42) passes through the pipeline and is connected with the delivery port of second transfer jar (3), simultaneously the delivery port of second condenser (42) passes through the pipeline and is connected with the water inlet of frozen water pipe.

2. The waste heat recycling refrigeration system based on lithium bromide refrigeration as claimed in claim 1, characterized in that: the cooling water pipe (5) passes through the absorber (22) and the first condenser (23) in sequence.

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