Composite energy type lithium bromide absorption water chilling unit

Abstract

The utility model belongs to the technical field of refrigeration equipment, and discloses a composite energy type lithium bromide absorption water chilling unit. Comprising an evaporator, an absorber, a condenser, a low-temperature regenerator, a warm water regenerator, a warm water condenser and a steam high-temperature regenerator. The bottom of the absorber is sequentially connected with a circulating pump A, a low-temperature heat exchanger, a condensed water heat recoverer, a flue gas heat recoverer and a warm water regenerator; the warm water regenerator is sequentially connected with a circulating pump C, a high-temperature heat exchanger and a flue gas high-temperature regenerator; the flue gas high-temperature regenerator is connected with the flue gas heat recoverer, and the low-temperature regenerator is sequentially connected with the circulating pump B, the low-temperature heat exchanger and the absorber. The unit can utilize various heat sources for refrigeration, energy sources such as steam, hot water and flue gas can jointly participate in refrigeration, heat source refrigeration can be independently provided by flue gas, steam and hot water, and partial energy sources such as flue gas-hot water, flue gas-steam, steam-hot water and the like can be combined for refrigeration.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and relates to a composite energy type lithium bromide absorption chiller. Background Technique

[0002] With the increasing efforts of the government in energy conservation and carbon reduction, the waste heat recovery needs to be utilized more deeply. Most of the flue gas and waste steam discharged from factories cannot be utilized deeply and are then discharged into the atmosphere or discharged into the atmosphere after being cooled by a heat exchanger. In this process, most of the waste heat is wasted and pollutes the environment. At the same time, the flue gas, hot water, and steam discharged from coal plants and power plants cannot be utilized simultaneously, so it is necessary to add one or even multiple units to meet the user's needs. There is an urgent need to develop a lithium bromide absorption chiller that can use multiple heat sources for refrigeration. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the above background technique and provide a composite energy type lithium bromide absorption chiller. The chiller can use multiple heat sources for refrigeration. Energies such as steam, hot water, and flue gas can participate in refrigeration together, or flue gas, steam, and hot water can provide heat sources for refrigeration alone, or partial energy composites such as flue gas - hot water, flue gas - steam, and steam - hot water can be used for refrigeration.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a composite energy type lithium bromide absorption chiller, including an evaporator, an absorber, a condenser, a low-temperature regenerator, a warm-water regenerator, a warm-water condenser, and a steam high-temperature regenerator; the evaporator and the absorber are arranged in a cylinder, the condenser and the low-temperature regenerator are arranged in a cylinder, the warm-water regenerator and the warm-water condenser are arranged in a cylinder, the bottom of the absorber is sequentially connected to a circulation pump A, a low-temperature heat exchanger, a condensate heat recovery device, a flue gas heat recovery device, and the warm-water regenerator; the warm-water regenerator is sequentially connected to a circulation pump C, a high-temperature heat exchanger, and a flue gas high-temperature regenerator; the flue gas high-temperature regenerator is connected to the flue gas heat recovery device, the low-temperature regenerator is sequentially connected to a circulation pump B, a low-temperature heat exchanger, and the absorber; the condenser is connected to the evaporator, the warm-water condenser is connected to the evaporator, and the steam high-temperature regenerator is sequentially connected to the low-temperature regenerator and the condenser; the steam high-temperature regenerator is sequentially connected to the high-temperature heat exchanger and the low-temperature regenerator; the flue gas high-temperature regenerator is connected to the steam high-temperature regenerator; the cooling water pipeline is sequentially connected to the absorber, the condenser, and the warm-water condenser.

[0005] The top of the flue gas high-temperature regenerator is connected to the top of the steam high-temperature regenerator; the upper part of the flue gas high-temperature regenerator is connected to the side part of the steam high-temperature regenerator.

[0006] The bottom of the evaporator is sequentially connected to a refrigerant pump and the top of the evaporator.

[0007] The warm water regenerator and the warm water condenser are arranged above the condenser and the low-temperature regenerator, and the condenser and the low-temperature regenerator are arranged above the evaporator and the absorber.

[0008] The warm water regenerator is also connected with a warm water inlet pipeline and a warm water outlet pipeline. A warm water inlet is arranged on the warm water inlet pipeline; a warm water outlet is arranged on the warm water outlet pipeline. The warm water inlet pipeline and the warm water outlet pipeline are connected through a warm water branch, and a warm water three-way valve is arranged between the warm water outlet pipeline and the warm water branch.

[0009] The warm water regenerator is sequentially connected to pipeline A, circulation pump C, high-temperature heat exchanger, and flue gas high-temperature regenerator; the low-temperature regenerator is sequentially connected to pipeline B, circulation pump B, low-temperature heat exchanger, and absorber; pipeline A and pipeline B are connected through a pipeline.

[0010] The condenser is connected to the evaporator through pipeline C and pipeline D in sequence, and a storage energy valve B is arranged on pipeline C.

[0011] The warm water condenser is connected to the evaporator through pipeline E and pipeline D, and a storage energy valve A is arranged on pipeline E. Pipeline C and pipeline E are respectively connected to pipeline D.

[0012] The evaporator is also connected with a cold water inlet pipeline and a cold water outlet pipeline. A cold water inlet is arranged on the cold water inlet pipeline, and a cold water outlet is arranged on the cold water outlet pipeline.

[0013] The flue gas high-temperature regenerator is also connected with a flue gas outlet pipeline and a flue gas inlet pipeline. A flue gas outlet is arranged on the flue gas outlet pipeline, and a flue gas inlet is arranged on the flue gas inlet pipeline.

[0014] Cooling water outlets and cooling water inlets are arranged at both ends of the cooling water pipeline. The cooling water inlet is arranged at one end of the absorber, and the cooling water outlet is arranged at one end of the warm water condenser.

[0015] The bottom of the steam high-temperature regenerator is connected to a steam condensate outlet pipeline, and a steam condensate outlet is arranged on the steam condensate outlet pipeline. The steam high-temperature regenerator is also connected to a steam inlet pipeline, and a steam inlet is arranged on the steam inlet pipeline.

[0016] The composite energy type lithium bromide absorption chiller is also equipped with a PLC control system. The PLC control system is respectively connected to the evaporator, absorber, low-temperature heat exchanger, condensate heat recovery device, high-temperature heat exchanger, flue gas high-temperature regenerator, flue gas heat recovery device, steam high-temperature regenerator, warm water regenerator, warm water condenser, condenser, low-temperature regenerator, circulation pump A, circulation pump B, circulation pump C, refrigerant pump, storage energy valve A, storage energy valve B, and warm water three-way valve, and none of them is limited to a specific model, as long as its working function can be realized.

[0017] The beneficial effects of the present utility model compared with the prior art are:

[0018] A composite energy type lithium bromide absorption chiller provided by the utility model solves the problem of how to utilize different forms of heat sources such as flue gas, hot water, and steam, and at the same time, when one of the heat sources cannot be used, other heat sources can maintain the refrigeration capacity of the chiller, and at the same time utilize the waste heat of flue gas generated by factories such as power plants and coal plants, so as to save energy and reduce emissions. When the user's demand changes, the chiller can adjust itself internally to meet the user's usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0020] Figure 1 is a schematic diagram of a composite energy type lithium bromide absorption chiller of the present utility model.

[0021] In the figure, 1. evaporator, 2. absorber, 3. low-temperature heat exchanger, 4. condensate heat recovery device, 5. high-temperature heat exchanger, 6. flue gas high-temperature regenerator, 7. flue gas heat recovery device, 8. steam high-temperature regenerator, 9. warm water regenerator, 10. warm water condenser, 11. condenser, 12. low-temperature regenerator, 13. circulation pump A, 14. circulation pump B, 15. circulation pump C, 16. refrigerant pump, 17. energy storage valve A, 18. energy storage valve B, 19. warm water three-way valve, 20. cold water inlet, 21. cold water outlet, 22. cooling water inlet, 23. cooling water outlet, 24. steam inlet, 25. steam condensate outlet, 26. flue gas inlet, 27. flue gas outlet, 28. warm water inlet, 29. warm water outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present utility model in conjunction with the drawings of the specification, but the present utility model is not limited to the following embodiments. When the chiller is refrigerating, it preferentially uses the heat of flue gas and hot water. When the steam high-temperature regenerator is used in cooperation with the flue gas high-temperature regenerator and hot water, if the heat provided by the flue gas high-temperature regenerator and hot water can completely meet the refrigeration demand of the chiller, the steam high-temperature regenerator can not participate in refrigeration. If the total heat of the flue gas high-temperature regenerator and hot water can not meet the refrigeration demand of the chiller, at this time, it is necessary to make the steam high-temperature regenerator make up. When the chiller is refrigerating, it preferentially uses the heat of flue gas and hot water. When the steam high-temperature regenerator is used in cooperation with the flue gas high-temperature regenerator and hot water, if the heat provided by the flue gas high-temperature regenerator and hot water can completely meet the refrigeration demand of the chiller, the steam high-temperature regenerator can not participate in refrigeration. If the total heat of the flue gas high-temperature regenerator and hot water can not meet the refrigeration demand of the chiller, at this time, it is necessary to make the steam high-temperature regenerator make up. The specific model of the steam high-temperature regenerator can be selected according to the actual working conditions without special limitation, as long as its specific working function is realized.

[0023] Embodiment 1

[0024] A composite energy type lithium bromide absorption chiller, as Figure 1 shown, includes an evaporator 1, an absorber 2, a condenser 11, a low-temperature regenerator 12, a warm-water regenerator 9, a warm-water condenser 10, and a steam high-temperature regenerator 8; the evaporator 1 and the absorber 2 are arranged in a cylinder, the condenser 11 and the low-temperature regenerator 12 are arranged in a cylinder, the warm-water regenerator 9 and the warm-water condenser 10 are arranged in a cylinder, the bottom of the absorber 1 is sequentially connected to a circulation pump A 13, a low-temperature heat exchanger 3, a condensate heat recovery device 4, a flue gas heat recovery device 7, and the warm-water regenerator 9; the warm-water regenerator 9 is sequentially connected to a circulation pump C 15, a high-temperature heat exchanger 5, and a flue gas high-temperature regenerator 6; the flue gas high-temperature regenerator 6 is connected to the flue gas heat recovery device 7, the low-temperature regenerator 12 is sequentially connected to a circulation pump B 14, the low-temperature heat exchanger 3, and the absorber 2; the condenser 11 is connected to the evaporator 1, the warm-water condenser 10 is connected to the evaporator 1, the steam high-temperature regenerator 8 is sequentially connected to the low-temperature regenerator 12 and the condenser 11; the steam high-temperature regenerator 8 is sequentially connected to the high-temperature heat exchanger 5 and the low-temperature regenerator 12; the flue gas high-temperature regenerator 6 is connected to the steam high-temperature regenerator 8; the cooling water pipeline is sequentially connected to the absorber 2, the condenser 11, and the warm-water condenser 10.

[0025] The top of the flue gas high-temperature regenerator 6 is connected to the top of the steam high-temperature regenerator 8; the upper part of the flue gas high-temperature regenerator 6 is connected to the side of the steam high-temperature regenerator 8.

[0026] The bottom of the evaporator 1 is sequentially connected to a refrigerant pump 16 and the top of the evaporator 1.

[0027] The warm-water regenerator 9 and the warm-water condenser 10 are arranged above the condenser 11 and the low-temperature regenerator 12, and the condenser 11 and the low-temperature regenerator 12 are arranged above the evaporator 1 and the absorber 2.

[0028] The warm-water regenerator 9 is also connected with a warm-water inlet pipeline and a warm-water outlet pipeline, a warm-water inlet 28 is arranged on the warm-water inlet pipeline; a warm-water outlet 29 is arranged on the warm-water outlet pipeline. The warm-water inlet pipeline and the warm-water outlet pipeline are connected through a warm-water branch, and a warm-water three-way valve 19 is arranged between the warm-water outlet pipeline and the warm-water branch.

[0029] The warm-water regenerator 9 is sequentially connected to pipeline A, a circulation pump C 15, a high-temperature heat exchanger 5, and a flue gas high-temperature regenerator 6; the low-temperature regenerator 12 is sequentially connected to pipeline B, a circulation pump B 14, a low-temperature heat exchanger 3, and the absorber 2; pipeline A and pipeline B are connected through a pipeline.

[0030] The condenser 11 is sequentially connected to the evaporator 1 through pipeline C and pipeline D, and a storage energy valve B 18 is arranged on pipeline C.

[0031] The warm water condenser 10 is connected to the evaporator 1 through pipeline E and pipeline D, and an energy storage valve A17 is provided on pipeline E. Pipeline C and pipeline E are respectively connected to pipeline D.

[0032] The evaporator 1 is also connected to a cold water inlet pipeline and a cold water outlet pipeline. A cold water inlet 20 is provided on the cold water inlet pipeline, and a cold water outlet 21 is provided on the cold water outlet pipeline.

[0033] The flue gas high-temperature regenerator 6 is also connected to a flue gas outlet pipeline and a flue gas inlet pipeline. A flue gas outlet 27 is provided on the flue gas outlet pipeline, and a flue gas inlet 26 is provided on the flue gas inlet pipeline.

[0034] A cooling water outlet 23 and a cooling water inlet 22 are provided at both ends of the cooling water pipeline. The cooling water inlet 22 is provided at one end of the absorber 2, and the cooling water outlet 23 is provided at one end of the warm water condenser 10.

[0035] The bottom of the steam high-temperature regenerator 8 is connected to a steam condensate outlet pipeline, and a steam condensate outlet 25 is provided on the steam condensate outlet pipeline. The steam high-temperature regenerator 8 is also connected to a steam inlet pipeline, and a steam inlet 24 is provided on the steam inlet pipeline.

[0036] During specific operation:

[0037] After the solution flows out of the circulation pump A13, it flows through the low-temperature heat exchanger 3, the condensate heat recovery device 4, the flue gas heat recovery device 7 in sequence, and enters the warm water regenerator 9, becoming a solution with an intermediate concentration A. The solution with an intermediate concentration A passes through the circulation pump C15 and the high-temperature heat exchanger 5. It enters the high-temperature flue gas regenerator 6, and after being heated by the high-temperature flue gas regenerator 6, it enters the high-temperature steam regenerator 8. After being heated by the steam in the high-temperature steam regenerator 8, it becomes a solution with an intermediate concentration B. At this time, the concentration of the solution is higher than that of the intermediate concentration A. After the solution flows out of the high-temperature steam regenerator 8, it passes through the high-temperature heat exchanger 5 and enters the low-temperature regenerator 12, becoming a concentrated solution. The concentrated solution passes through the circulation pump B14 and the low-temperature heat exchanger 3, and returns to the absorber 2. At this time, after absorbing the water vapor evaporated from the absorption evaporator 1, it becomes a dilute solution and conducts a reciprocating cycle. (The above is the solution cycle). The flue gas at about 400 °C at the flue gas inlet 26 enters the high-temperature flue gas regenerator 6, heating the solution in the high-temperature flue gas regenerator 6, causing a part of the water in the solution to evaporate and enter the high-temperature steam regenerator 8 through a pipeline. At the same time, the solution in the high-temperature steam regenerator 8 is heated by the steam from the steam inlet 24, and also forms a part of water vapor. The two parts of water vapor enter the low-temperature regenerator 12 at the same time, heating the solution and causing the solution in the low-temperature regenerator 12 to be concentrated again. A part of the water vapor enters the condenser 11. The high-temperature water entering from the warm water inlet 28 heats the solution in the warm water regenerator 9, and the generated water vapor enters the warm water condenser 10 and is cooled by the cooling water to form liquid refrigerant water. At the same time, the steam in the condenser 11 is also condensed by the cooling water to form liquid refrigerant water. The two parts of refrigerant water converge and enter the evaporator 1 at the same time, are pumped upward through the refrigerant pump 16, and drip in the evaporator 1 to cool the water at the cold water inlet 10 from 12 °C to 7 °C, thereby achieving the refrigeration effect. (The above is the water cycle).

[0038] A condensate heat recovery device 4 is provided at the front end of the steam condensate outlet 25. Its function is to recycle the condensate generated by the input steam twice, avoid energy waste, heat the solution, and increase the concentration of the solution. A flue gas heat recovery device 7 is provided at the flue gas outlet 27. It has three functions: 1. Recycle the waste heat of the flue gas twice, reduce the temperature of the flue gas outlet 27 to a lower level to meet the effect of secondary energy utilization; 2. Increase the concentration of the solution, make the solution entering the warm water regenerator 9 more concentrated, and help improve the COP of the unit; 3. The solution entering the flue gas heat recovery device 7 exchanges heat countercurrently with the flue gas heat recovery device 7 (4. The outlet of the solution from the condensate heat recovery device contacts the inlet of the flue gas heat recovery device 7), making more full use of the waste heat of the flue gas and maximizing the performance and efficiency of the flue gas heat recovery device.

[0039] The unit is provided with a warm water three-way valve 19 at the middle position between the warm water inlet 28 and the warm water outlet 29. When the temperature or flow rate of the warm water inlet 28 and the warm water outlet 29 is larger than the designed value, the warm water three-way valve 19 bypasses the excess flow rate to ensure the normal operation of the warm water regenerator 9. An energy storage valve is provided at the outlet of each of the warm water condenser 10 and the condenser 11. When the user's requirement for cooling capacity is not very high, but still needs to consume the heat sources such as steam, flue gas or hot water, the opening degrees of the two energy storage valves can be reduced to indirectly reduce the amount of refrigerant entering the evaporator 1, thereby indirectly reducing the cooling capacity of the unit. When the user's requirement for cooling capacity increases, the two energy storage valves are slowly opened according to the user's demand to increase the amount of refrigerant entering the evaporator 1 to meet the user's demand. This method can be used as an energy storage method of the unit to meet different demands of the user.

[0040] Through the above circulation method, flue gas, steam and hot water can be comprehensively utilized, and different cooling capacities can be produced to meet the requirements of users.

[0041] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A composite energy type lithium bromide absorption chiller, characterized in that: The invention comprises an evaporator (1), an absorber (2), a condenser (11), a low-temperature regenerator (12), a warm water regenerator (9), a warm water condenser (10), and a steam high-temperature regenerator (8); the evaporator (1) and the absorber (2) are arranged in a cylinder, the condenser (11) and the low-temperature regenerator (12) are arranged in a cylinder, the warm water regenerator (9) and the warm water condenser (10) are arranged in a cylinder, and the bottom of the absorber (2) is connected in sequence to a circulating pump A (13), a low-temperature heat exchanger (3), a condensate heat recovery device (4), a flue gas heat recovery device (7), and a warm water regenerator (9); the warm water regenerator (9) is connected in sequence to a circulating pump C (15), a high-temperature heat exchanger (5), a flue gas heat recovery device (7), and a warm water regenerator (9). A high-temperature regenerator (6); the flue gas high-temperature regenerator (6) is connected to the flue gas heat recovery device (7); the low-temperature regenerator (12) is connected to the circulation pump B (14), the low-temperature heat exchanger (3), and the absorber (2) in sequence; the condenser (11) is connected to the evaporator (1), the warm water condenser (10) is connected to the evaporator (1), the steam high-temperature regenerator (8) is connected to the low-temperature regenerator (12) and the condenser (11) in sequence; the steam high-temperature regenerator (8) is connected to the high-temperature heat exchanger (5) and the low-temperature regenerator (12) in sequence; the flue gas high-temperature regenerator (6) is connected to the steam high-temperature regenerator (8); the cooling water pipeline is connected to the absorber (2), the condenser (11), and the warm water condenser (10) in sequence.

2. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The bottom of the evaporator (1) is connected to the refrigerant pump (16) and the top of the evaporator (1) in sequence.

3. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The warm water regenerator (9) is also connected to a warm water inlet pipeline and a warm water outlet pipeline, wherein a warm water inlet (28) is arranged on the warm water inlet pipeline; a warm water outlet (29) is arranged on the warm water outlet pipeline; the warm water inlet pipeline and the warm water outlet pipeline are connected via a warm water branch, and a warm water three-way valve (19) is arranged between the warm water outlet pipeline and the warm water branch.

4. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The warm water regenerator (9) is sequentially connected to the pipeline A, the circulation pump C (15), the high temperature heat exchanger (5), and the flue gas high temperature regenerator (6); the low temperature regenerator (12) is sequentially connected to the pipeline B, the circulation pump B (14), the low temperature heat exchanger (3), and the absorber (2); the pipeline A and the pipeline B are connected by a pipeline.

5. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The condenser (11) is connected to the evaporator (1) via pipelines C and D in sequence, and an energy storage valve B (18) is provided on pipeline C; the warm water condenser (10) is connected to the evaporator (1) via pipelines E and D, and an energy storage valve A (17) is provided on pipeline E; and pipelines C and E are connected to pipeline D respectively.

6. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The evaporator (1) is also connected to a cold water inlet pipeline and a cold water outlet pipeline. A cold water inlet (20) is arranged on the cold water inlet pipeline, and a cold water outlet (21) is arranged on the cold water outlet pipeline.

7. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The flue gas high temperature regenerator (6) is also connected to a flue gas outlet pipeline and a flue gas inlet pipeline, wherein a flue gas outlet (27) is arranged on the flue gas outlet pipeline, and a flue gas inlet (26) is arranged on the flue gas inlet pipeline.

8. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The bottom of the steam high-temperature regenerator (8) is connected to a steam condensate outlet pipeline, and a steam condensate outlet (25) is arranged on the steam condensate outlet pipeline; the steam high-temperature regenerator (8) is also connected to a steam inlet pipeline, and a steam inlet (24) is arranged on the steam inlet pipeline.

9. A composite energy type lithium bromide absorption chiller as claimed in claim 1, characterized in that: The top of the flue gas high temperature regenerator (6) is connected to the top of the steam high temperature regenerator (8); the upper part of the flue gas high temperature regenerator (6) is connected to the side of the steam high temperature regenerator 8.

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