CN215295424U - Low-temperature lithium bromide absorption type water chilling unit - Google Patents
Low-temperature lithium bromide absorption type water chilling unit Download PDFInfo
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- CN215295424U CN215295424U CN202120990337.7U CN202120990337U CN215295424U CN 215295424 U CN215295424 U CN 215295424U CN 202120990337 U CN202120990337 U CN 202120990337U CN 215295424 U CN215295424 U CN 215295424U
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Abstract
The utility model relates to a refrigeration plant field, in particular to low temperature type lithium bromide absorption formula cold water unit. A low-temperature lithium bromide absorption type water chilling unit comprises a high-pressure cylinder, a low-pressure cylinder, a high-pressure evaporator, a low-pressure absorber, a refrigerant control valve II, a refrigerant throttling device and a liquid level monitoring device, wherein the high-pressure cylinder is formed by the high-pressure evaporator and the high-pressure absorber, the low-pressure cylinder is formed by the low-pressure evaporator and the low-pressure absorber, the high-pressure cylinder is located above the low-pressure cylinder, refrigerant water in the high-pressure evaporator is partially delivered to the low-pressure absorber through the refrigerant circulation pipeline, a part of the refrigerant water is delivered to the low-pressure absorber through the refrigerant control valve II and the refrigerant throttling device, high-temperature refrigerant water prepared by the low-pressure absorber enters the high-pressure evaporator through a refrigerant pipeline, and the high-pressure evaporator is provided with the liquid level monitoring device. The utility model discloses a cryogen circulation is realized to high pressure evaporator and low pressure absorber's difference in height, need not to set up the solution circulating pump between high pressure absorber and low pressure absorber, also need not install the heat exchange tube in the high pressure evaporator section of thick bamboo, and the system is simpler to can solve the unmatched problem of high pressure evaporator and low pressure absorber heat transfer.
Description
Technical Field
The utility model relates to a refrigeration plant field, in particular to low temperature type lithium bromide absorption formula cold water unit.
Background
At present, the absorption refrigerating unit is most widely applied to a lithium bromide absorption refrigerating unit, the lithium bromide solution is used as an absorbent, water is used as a refrigerant, the unit is driven by heat energy (steam, hot water, flue gas, fuel combustion heat and the like), and cold water with the temperature of above 5 ℃ is generally prepared to meet the refrigerating requirements of an air conditioner or a process. The unit can utilize waste heat to refrigerate, is a main energy comprehensive utilization device in the fields of industry, energy and the like, is widely applied to industrial waste heat recovery refrigeration of industries such as steel, petrifaction and chemical industry, namely, waste heat recovery is realized, and refrigeration can meet process requirements.
The applicant provides an absorption refrigeration unit for preparing low-temperature cold water in a patent with the application number of CN202020675107.7, wherein a high-pressure evaporator and a low-pressure absorber realize heat exchange through indirect circulation of an internal circulating water pump, but in practical application, the problems that the heat exchange capacities of the high-pressure evaporator and the low-pressure absorber are not matched, an expansion water tank needs to be arranged in a circulating water system and the like exist, so that the phenomena of complex system structure and large equipment investment are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problems that the heat transfer capacity of the existing refrigerating unit is not matched, the system structure is complicated and the equipment investment is large, providing a low-temperature lithium bromide absorption type water chilling unit, needing not to set up the solution circulating pump between high-pressure absorber and low-pressure absorber, needing not to install the heat exchange tube in the high-pressure evaporator section of thick bamboo, solved the unmatched problem of high-pressure evaporator and low-pressure absorber heat transfer to circulating water system need not to set up expansion tank, the system is simpler, and investment cost is lower.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a low-temperature lithium bromide absorption type water chilling unit comprises a high-pressure evaporator, a high-pressure absorber, a refrigerant concentration monitoring device, a low-pressure evaporator, a low-pressure absorber, a low-pressure evaporator refrigerant pump, a solution control valve, a dilute solution pump, a refrigerant control valve I, a low-temperature heat exchanger, a concentrated solution pump, a heat recoverer, a steam trap, a high-temperature regenerator, a high-temperature heat exchanger, a refrigerant condensate heat exchanger, a low-temperature regenerator, a condenser and corresponding connecting pipelines, wherein the high-pressure absorber, the low-pressure absorber, the high-temperature regenerator, the low-temperature regenerator and the corresponding connecting pipelines form a solution circulation loop, a driving heat source is connected to the high-temperature regenerator and the heat recoverer through the pipelines, chilled water is connected to the low-pressure evaporator through the pipelines, cooling water is sequentially connected to the high-pressure evaporator, the high-pressure absorber and the condenser through the pipelines, and a high-pressure cylinder is formed by the high-pressure evaporator and the high-pressure absorber, the low-pressure evaporator and the low-pressure absorber form a low-pressure cylinder, the high-pressure cylinder is positioned above the low-pressure cylinder, refrigerant water in the high-pressure evaporator is partially sent to the low-pressure absorber through a refrigerant circulation pipeline, a part of the refrigerant water is sent to the low-pressure evaporator through a refrigerant control valve II and a refrigerant throttling device, and high-temperature refrigerant water prepared by the low-pressure absorber enters the high-pressure evaporator through a refrigerant pipeline.
Further, the high-pressure evaporator is provided with a liquid level monitoring device.
Furthermore, a circulation quantity regulating valve is arranged on the refrigerant circulation pipeline.
Further, the circulation amount adjustment valve is a manual valve.
Further, the refrigerant throttling device is arranged in parallel with the refrigerant control valve I.
The utility model discloses beneficial effect as follows:
(1) the utility model discloses the circulation of constituteing between cooling water set high pressure evaporator and the low pressure absorber realizes through the difference in height of high pressure evaporator and low pressure absorber, need not to set up the solution circulating pump between high pressure evaporator and low pressure absorber, also need not install the heat exchange tube in the high pressure evaporator section of thick bamboo, has reduced the evaporator volume to circulating water system need not to set up expansion tank, and the system is simpler, and investment cost is lower, and can solve the unmatched problem of high pressure evaporator and low pressure absorber heat transfer.
(2) The utility model discloses the inside some cryogen water that comes out of cooling water set high pressure evaporator supplements the low pressure evaporator through cryogen control valve and cryogen throttling arrangement to guarantee the cryogen balance and the high pressure evaporator liquid level of high pressure evaporator and low pressure evaporator, control cryogen circulation volume through liquid level monitoring device, circulation volume governing valve and cryogen control valve.
Drawings
Fig. 1 is a schematic view of the low-temperature type lithium bromide absorption water chilling unit of the present invention.
In the figure: 1. the system comprises a high-pressure evaporator, 2, a liquid level monitoring device, 3, a high-pressure absorber, 4, a refrigerant circulating pipeline, 5, a refrigerant concentration monitoring device, 6, a low-pressure evaporator, 7, a low-pressure absorber, 8, a low-pressure evaporator refrigerant pump, 9, a solution control valve, 10, a dilute solution pump, 11, a refrigerant control valve I, 12, a refrigerant throttling device, 13, a refrigerant control valve II, 14, a low-temperature heat exchanger, 15, a concentrated solution pump, 16, a heat recoverer, 17, a steam trap, 18, a high-temperature regenerator, 19, a high-temperature heat exchanger, 20, a refrigerant condensate heat exchanger, 21, a low-temperature regenerator, 22, a condenser, A, B, a chilled water outlet, C, a cooling water inlet, D, a cooling water outlet, E, a driving heat source inlet and F, and a driving heat source outlet.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples, but the present invention is not limited to the specific examples.
As shown in fig. 1, a low-temperature lithium bromide absorption water chilling unit comprises a high-pressure evaporator 1, a high-pressure absorber 3, a refrigerant concentration monitoring device 5, a low-pressure evaporator 6, a low-pressure absorber 7, a low-pressure evaporator refrigerant pump 8, a solution control valve 9, a dilute solution pump 10, a refrigerant control valve I11, a low-temperature heat exchanger 14, a concentrated solution pump 15, a heat recovery device 16, a steam trap 17, a high-temperature regenerator 18, a high-temperature heat exchanger 19, a refrigerant condensate heat exchanger 20, a low-temperature regenerator 21, a condenser 22, a chilled water inlet a, a chilled water outlet B, a chilled water inlet C, a chilled water outlet D, a driving heat source inlet E, a driving heat source outlet F and corresponding connecting pipelines, wherein the high-pressure absorber 3, the low-pressure absorber 7, the high-temperature regenerator 18, the low-temperature regenerator 21 and the corresponding connecting pipelines form a solution circulation loop, and the driving heat source is connected to the high-temperature regenerator 18 and the heat recovery device 16 through the pipelines, chilled water is connected to a low-pressure evaporator 6 through a pipeline, cooling water is sequentially connected to a high-pressure evaporator 1, a high-pressure absorber 3 and a condenser 22 through pipelines, the high-pressure evaporator 1 and the high-pressure absorber 3 form a high-pressure cylinder, the low-pressure evaporator 6 and the low-pressure absorber 7 form a low-pressure cylinder, the high-pressure cylinder is positioned above the low-pressure cylinder, refrigerant water in the high-pressure evaporator 1 is sent to the low-pressure absorber 7 through a part of a refrigerant circulation pipeline 4, a part of the refrigerant water is sent to the low-pressure evaporator 6 through a refrigerant control valve II13 and a refrigerant throttling device 12, the refrigerant throttling device 12 and the refrigerant control valve I11 are arranged in parallel, a circulation quantity regulating valve is arranged on the refrigerant circulation pipeline 4, the circulation quantity regulating valve is a manual valve, high-temperature water prepared by the low-pressure absorber 7 enters the high-pressure refrigerant evaporator 1 through the refrigerant pipeline for flashing, the high-pressure evaporator 1 is provided with a liquid level monitoring device 2 for monitoring the liquid level of the high-pressure evaporator 1, specifically, the liquid level height of the high-pressure evaporator 1 is monitored by a liquid level electrode.
The operation process of the unit is as follows: a driving heat source (steam, hot water, fuel combustion heat, flue gas and the like) enters a high-temperature regenerator 18 to heat a lithium bromide dilute solution which comes from a low-pressure absorber 7 and exchanges heat through a condensate heat exchanger 20, a low-temperature heat exchanger 14, a heat recoverer 16 and a high-temperature heat exchanger 19, the dilute solution is heated and boiled, refrigerant water is evaporated into primary refrigerant steam, and the dilute solution is concentrated into an intermediate solution; the intermediate solution enters a low-temperature regenerator 21 after being subjected to heat exchange by a high-temperature heat exchanger 19, is heated and concentrated into a concentrated solution by primary refrigerant steam from a high-temperature regenerator 18 in the low-temperature regenerator 21, and simultaneously evaporates secondary refrigerant steam; the concentrated solution from the low-temperature regenerator 21 enters the high-pressure absorber 3 after being subjected to heat exchange by the low-temperature heat exchanger 14, and absorbs refrigerant steam from the high-pressure evaporator 1 to become high-pressure dilute solution; the high-pressure weak solution flows into the low-pressure absorber 7 by gravity, and the refrigerant vapor from the low-pressure evaporator 6 is absorbed in the low-pressure absorber 7 to become a weak solution. The primary refrigerant steam from the high-temperature regenerator 18 enters a low-temperature regenerator 21 for heat exchange to become refrigerant water, and then enters a condenser 22 for heat exchange through a condensate heat exchanger 20; the secondary refrigerant steam from the low-temperature regenerator 21 enters a condenser 22 to exchange heat with cooling water to become refrigerant water, the primary refrigerant steam and the secondary refrigerant steam become water and then are converged in the condenser 22 and then enter the high-pressure evaporator 1 through a throttling and pressure reducing device, the circulation formed between the high-pressure evaporator 1 and the low-pressure absorber 7 is realized through the height difference between the high-pressure evaporator 1 and the low-pressure absorber 7, part of the refrigerant water in the high-pressure evaporator 1 is sent to the low-pressure absorber 7 through a refrigerant circulation pipeline 4 by virtue of the height difference, the refrigerant water is heated and heated in the low-pressure absorber 7 to become a steam-water mixture and then enters the high-pressure evaporator 1 to be directly flashed, the flashed refrigerant steam enters the high-pressure absorber 3 and is absorbed by a lithium bromide solution in the high-pressure absorber 3, the temperature of the refrigerant water in the high-pressure evaporator 1 is reduced, and the refrigerant steam enters the low-pressure absorber 7 again to serve as low-temperature cooling water; the other part of refrigerant water in the high-pressure evaporator 1 is supplemented into the low-pressure evaporator 6 through the refrigerant control valve II13 and the refrigerant throttling device 12, so that the refrigerant balance of the high-pressure evaporator 1 and the low-pressure evaporator 6 and the liquid level of the high-pressure evaporator 1 are ensured, the high-pressure evaporator 1 is provided with the liquid level monitoring device 2, the refrigerant liquid level in the high-pressure evaporator 1 can be monitored in real time, and when the liquid level of the high-pressure evaporator 1 is low, the refrigerant circulation amount is controlled by adjusting the manual valve and the refrigerant control valve II 13. The concentration of the lithium bromide solution in the low-pressure evaporator 6 is accurately controlled through the concentration measuring device 5, the solution control valve 9, the refrigerant water control valve I11, the control device and the like, so that the refrigerant can be guaranteed not to freeze, low-temperature chilled water can be prepared, the concentration of the refrigerant can be adjusted according to different working conditions, and the unit can be guaranteed to run under the optimal condition. The lithium bromide solution concentration in the low-pressure evaporator 6 is controlled as follows: when the concentration of the lithium bromide solution is lower than a set value, the lithium bromide solution is pumped into the low-pressure evaporator 6 through the solution control valve 9; when the concentration of the lithium bromide solution is higher than a set value, refrigerant water is pumped into the low-pressure evaporator 6 through a refrigerant water control valve I11; when the concentration of the lithium bromide solution in the low-pressure evaporator 6 is too high, the lithium bromide solution is discharged to the low-pressure absorber 7 by the low-pressure evaporator refrigerant pump 8. The chilled water enters the heat transfer pipe of the low-pressure evaporator 6, and the low-concentration lithium bromide solution evaporates and absorbs the heat of the chilled water in the heat transfer pipe outside the heat transfer pipe to prepare the low-temperature chilled water, and the anti-freezing liquid with a certain concentration is generally added into the low-temperature chilled water for anti-freezing.
The utility model discloses low temperature type lithium bromide absorption formula cold water unit utilizes steam, the flue gas, heat energy such as hot water and fuel drives, prepare low temperature refrigerated water about-5 ~0 ℃, the circulation of constituteing between high pressure evaporator and the low pressure absorber passes through the difference in height realization of high pressure evaporator and low pressure absorber, need not to set up the solution circulating pump between high pressure absorber and low pressure absorber, also need not install the heat exchange tube in the high pressure evaporator section of thick bamboo, and circulating water system need not to set up expansion tank, the system is simpler, investment cost is lower, and can solve the unmatched problem of high pressure evaporator and low pressure absorber heat transfer.
The above description is further detailed in connection with the preferred embodiments of the present invention, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses a under the prerequisite of the design, can also make simple deduction and replacement, all should regard as the utility model discloses a protection scope.
Claims (5)
1. A low temperature type lithium bromide absorption water chilling unit is characterized in that: the system comprises a high-pressure evaporator, a high-pressure absorber, a refrigerant concentration monitoring device, a low-pressure evaporator, a low-pressure absorber, a low-pressure evaporator refrigerant pump, a solution control valve, a dilute solution pump, a refrigerant control valve I, a low-temperature heat exchanger, a concentrated solution pump, a heat recoverer, a steam trap, a high-temperature regenerator, a high-temperature heat exchanger, a refrigerant condensate water heat exchanger, a low-temperature regenerator, a condenser and corresponding connecting pipelines, wherein the high-pressure absorber, the low-pressure absorber, the high-temperature regenerator, the low-temperature regenerator and the corresponding connecting pipelines form a solution circulation loop, a driving heat source is connected to the high-temperature regenerator and the heat recoverer through pipelines, chilled water is connected to the low-pressure evaporator through pipelines, cooling water is sequentially connected to the high-pressure evaporator, the high-pressure absorber and the condenser through pipelines, the high-pressure evaporator and the high-pressure absorber form a high-pressure cylinder, and the low-pressure evaporator and the low-pressure absorber form a low-pressure cylinder, the high-pressure cylinder is positioned above the low-pressure cylinder, refrigerant water in the high-pressure evaporator is sent to the low-pressure absorber through one part of the refrigerant circulating pipeline, one part of the refrigerant water is sent to the low-pressure evaporator through the refrigerant control valve II and the refrigerant throttling device, and high-temperature refrigerant water prepared by the low-pressure absorber enters the high-pressure evaporator through the refrigerant pipeline.
2. The low-temperature type lithium bromide absorption chiller according to claim 1, wherein: the high-pressure evaporator is provided with a liquid level monitoring device.
3. The low-temperature type lithium bromide absorption chiller according to claim 1, wherein: and a circulation quantity regulating valve is arranged on the refrigerant circulation pipeline.
4. The low-temperature type lithium bromide absorption chiller according to claim 3, wherein: the circulation quantity regulating valve is a manual valve.
5. The low-temperature type lithium bromide absorption chiller according to claim 1, wherein: the refrigerant throttling device is connected with the refrigerant control valve I in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120990337.7U CN215295424U (en) | 2021-05-11 | 2021-05-11 | Low-temperature lithium bromide absorption type water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120990337.7U CN215295424U (en) | 2021-05-11 | 2021-05-11 | Low-temperature lithium bromide absorption type water chilling unit |
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| Publication Number | Publication Date |
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| CN215295424U true CN215295424U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120990337.7U Active CN215295424U (en) | 2021-05-11 | 2021-05-11 | Low-temperature lithium bromide absorption type water chilling unit |
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| CN (1) | CN215295424U (en) |
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2021
- 2021-05-11 CN CN202120990337.7U patent/CN215295424U/en active Active
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Address after: 116000 No. 117, 118, Huaihe West Road, Dalian Economic and Technological Development Zone, Liaoning Province (No. 10, Songlan Street) Patentee after: Bingshan Songyang Refrigeration (Dalian) Co.,Ltd. Address before: 116000 No. 117, 118, Huaihe West Road, Dalian Economic and Technological Development Zone, Liaoning Province (No. 10, Songlan Street) Patentee before: PANASONIC REFRIGERATION (DALIAN) CO.,LTD. |