CN212057890U - Fluid precooling circulating system - Google Patents
Fluid precooling circulating system Download PDFInfo
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- CN212057890U CN212057890U CN202020328245.8U CN202020328245U CN212057890U CN 212057890 U CN212057890 U CN 212057890U CN 202020328245 U CN202020328245 U CN 202020328245U CN 212057890 U CN212057890 U CN 212057890U
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Abstract
The utility model provides a fluid precooling circulation system, including ammonia cooler, water collector, return line, desalination coolant liquid, air cooling tower and water-cooling tower. The method comprises the steps that after a water cooling tower liquid level meter meets conditions, a freezing water pump is started to enter the top of an air cooling tower through an ammonia cooler, heat exchange is carried out between the freezing water pump and fluid to be cooled, the fluid to be cooled is collected to a water collector, when the water collector liquid level meter reaches a certain liquid level, a desalination cooling liquid reflux working condition is established, the liquid level of the water collector is controlled through a water collector liquid level control valve, when desalination cooling liquid flows back to the top of the water cooling tower through a water return pipeline, and the desalination cooling liquid control valve is closed until the water cooling tower liquid level meter reaches balance, so that the problems that circulating water quality is poor, scaling and corrosion block heat.
Description
Technical Field
The utility model belongs to the technical field of the empty division of chemical industry relates to the technical transformation who solves low temperature heat exchanger scale deposit and extension equipment life, concretely relates to fluid precooling circulation system.
Background
In some chemical industries, a working fluid needs to be pre-cooled, and an air cooling tower and a water cooling tower are generally used. For example, in a thermal power plant, the air cooling tower is used for cooling steam from a steam turbine unit, condensing the steam into water and then sending the water back to the boiler for circulation.
At present, the cooling system that air cooling tower or water cooling tower related to, the main problem that exists lies in: the quality of the circulating water is poor, the freezing water entering the upper part of the air cooling tower from a freezing water pump of the water cooling tower through the ammonia evaporator is seriously scaled in a low-temperature state, the heat exchange tube of the ammonia evaporator is often blocked, the serious influence is brought to the safe, continuous and stable operation and the service life of the device, and the maintenance cost of the device is also increased.
Disclosure of Invention
Not enough to prior art, the utility model aims to provide a fluid precooling system mainly solves current air cooling tower cooling system pipe blockage, problem that life is short.
In order to achieve the above purpose, the utility model adopts the following technical means:
a fluid precooling circulating system comprises an ammonia cooler, a water collector, a reflux pipeline and a desalting cooling liquid; the desalted cooling liquid passes through the ammonia cooler and then exchanges heat with fluid needing cooling, and the desalted cooling liquid after heat exchange enters the water collector and then enters the ammonia cooler through the circulation of the return pipeline.
Still include the frozen water pump, frozen water pump and ammonia cold ware intercommunication, the desalination coolant liquid gets into the ammonia cold ware through cooling water pump.
The desalination cooling liquid control valve is used for controlling the liquid level of the desalination cooling liquid.
The device also comprises a water collector liquid level meter arranged on the water collector and used for recording the liquid level of the feedback water collector and simultaneously used as a basis for judging the circulation start of the return pipeline.
The water collector liquid level control valve is used for controlling the liquid level of the water collector.
The desalting cooling liquid reflux working condition is established after the water collector liquid level meter reaches a certain liquid level, the liquid level of the water collector is controlled through a water collector liquid level control valve, and when the desalting cooling liquid reflows to the top of the water cooling tower through a water return pipeline until the water cooling tower liquid level meter reaches a balance state, the desalting cooling liquid control valve is closed.
In addition, a desalted water replenishing pipeline, a desalted water replenishing control valve and a water cooling tower overflow pipe are also arranged on the water cooling tower.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a system, the water source in the water-cooling tower is the desalination coolant liquid, obtains 8-10 ℃ low temperature water at the cold ware heat transfer of ammonia after freezing water pump pressurization, gets into the air cooling tower and rises after treating the cooling air heat transfer, and it is circulating to the water collector to flow down, returns to the water-cooling tower formation through the wet return to solve the poor, problem of scale deposit, the corrosion blockage heat exchanger of circulating water quality and pipeline, extension equipment life. Specifically, the method comprises the following steps:
(1) the desalted cooling liquid does not generate the scaling problem after heat exchange, and a lower temperature drop effect can be obtained.
(2) After the desalted water is mixed with air at the top of the air cooling tower for heat exchange, the water quality of the desalted water is basically kept unchanged without continuous supplement and replacement.
(3) The outlet temperature of the air cooling tower can be ensured, and the service life of equipment and pipelines can be prolonged.
Drawings
Fig. 1 is a schematic view of the present invention.
In the figure: 1. the system comprises a water collector, 2, a water collector liquid level meter, 3, a water collector liquid level control valve, 4, a desalting cooling liquid water supplementing pipeline, 5, a desalting cooling liquid water supplementing control valve, 6, a water cooling tower liquid level meter, 7, a water cooling tower discharge port, 8, a reflux pipeline, 9, an air cooling tower and 10, wherein the water cooling tower is arranged in the water cooling tower.
The embodiments of the present invention will be further described with reference to the drawings and examples.
Detailed Description
The desalination coolant liquid can be desalination water, is the water of detaching or reducing to certain degree the strong electrolyte that contains in the raw water, remaining salt content is less than the circulating water of present open use far away.
The utility model discloses the low temperature water of 8-10 ℃ is obtained in the cold ware heat transfer of ammonia to the demineralized water in the water-cooling tower after freezing water pump pressurization, gets into air-cooling tower and updraft air heat transfer after, and it is low to the demineralized water collector, returns to the water-cooling tower through the wet return and forms the microcirculation.
The utility model discloses a system, the precooling, more indicate, the moisturizing of intaking the water cooling tower changes into the desalinized water, after freezing water pump pressurization, advances the ammonia evaporator and cools off, gets into air cooling tower upper portion after the cooling, takes return water cooling tower upper portion and dirty nitrogen gas, nitrogen gas out to carry out the heat transfer with air heat transfer back from the air cooling tower middle part, gets into freezing water pump after the cooling, forms a circulation.
Example 1:
according to the above process, this embodiment provides a pre-cooling circulation system, the cooling object is compressed air, the liquid level at the bottom of the desalted water supply water cooling tower 10 is provided through the desalted water control valve 5, the chilled water pump is started after the water cooling tower level gauge 6 meets the conditions, the chilled water pump enters the top of the air cooling tower 9 through the ammonia cooler, the chilled water exchanges heat with the rising air and then is collected to the water collector 1, the desalted water reflux condition starts to be established after the water collector level gauge 2 reaches a certain liquid level (determined by specific working conditions), the liquid level of the water collector 1 is controlled through the water collector level control valve 3, when the desalted water flows back to the top of the water cooling tower 10 through the water return pipe 8, the desalted water gradually falls after exchanging heat with the waste nitrogen, until the water cooling tower level gauge 6 reaches. The problem that the salinity of the desalted water is increased in the operation process is solved by regularly discharging a discharge port 7 of the water cooling tower.
The corrosion inhibitor adding system mainly comprises an adding pipeline communicated with the component 8, chemical corrosion is possible due to the low pH value of desalted water, corrosion of a heat exchanger can be reduced by adding the corrosion inhibitor in the circulating process of desalted water, and the corrosion inhibitor is neutralized by using some alkaline solution.
The desalted water replenishing pipe 4 and the desalted water replenishing control valve 5 provided in the block 4 are used for replacing desalted water, and since the water content gradually decreases and the original salt content is concentrated in a small cycle, the desalted water replenishing and the water discharging replacement need to be performed periodically.
Claims (9)
1. A fluid precooling circulating system comprises an ammonia cooler, and is characterized by also comprising a water collector (1), a return pipeline (8) and a desalting cooling liquid; the desalted cooling liquid is subjected to heat exchange with fluid needing cooling after passing through the ammonia cooler, and the desalted cooling liquid subjected to heat exchange enters the water collector (1) and then circularly enters the ammonia cooler through the return pipeline (8).
2. The pre-chilled fluid cycle system of claim 1, further comprising a chilled water pump, the chilled water pump being in communication with the ammonia cooler, the desalinated coolant being pumped into the ammonia cooler by the chilled water pump.
3. The pre-chilled fluid cycle system of claim 1, further comprising a desalination coolant control valve for controlling a desalination coolant level.
4. The fluid pre-cooling circulation system as claimed in claim 1, further comprising a water collector level gauge (2) disposed on the water collector (1) for recording the liquid level of the feedback water collector (1) and being used as a basis for judging the circulation start of the return pipe (8).
5. The fluid pre-cooling cycle system as set forth in claim 2, further comprising a sump level control valve (3) for controlling a sump (1) level.
6. The fluid precooling circulation system as claimed in claim 5, further comprising an air cooling tower and a water cooling tower, wherein the water collector (1) is arranged in the air cooling tower (9), a water cooling tower level gauge (6) is arranged in the water cooling tower (10), the water cooling tower level gauge (6) is used for starting a chilled water pump to enter the top of the air cooling tower (9) through an ammonia cooler after meeting the conditions, the chilled water pump exchanges heat with the fluid to be cooled and then collects the fluid to the water collector (1), the desalination cooling liquid reflux working condition is started to be established after the water collector (1) level gauge reaches a specified level, the water collector (1) level is controlled through the water collector level control valve (3), and when the desalination cooling liquid reflows to the top of the water cooling tower (10) through the reflux pipeline (8) until the water cooling tower level gauge (6) reaches equilibrium, the reflux is suspended.
7. The pre-cooling fluid circulation system as set forth in claim 6, wherein the water cooling tower (10) is provided with a desalinated water replenishing pipe (4) and a desalinated water replenishing control valve (5).
8. The fluid pre-cooling circulation system as set forth in claim 6, wherein the water cooling tower (10) is provided with a water cooling tower discharge port (7).
9. The pre-cooling fluid circulation system according to claim 1 or 8, wherein a corrosion inhibitor adding system is provided on the return line (8) for adding a corrosion inhibitor during the circulation of the desalted coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020328245.8U CN212057890U (en) | 2020-03-16 | 2020-03-16 | Fluid precooling circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020328245.8U CN212057890U (en) | 2020-03-16 | 2020-03-16 | Fluid precooling circulating system |
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| CN212057890U true CN212057890U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020328245.8U Active CN212057890U (en) | 2020-03-16 | 2020-03-16 | Fluid precooling circulating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562895A (en) * | 2022-01-26 | 2022-05-31 | 杭州制氧机集团股份有限公司 | Air precooling system |
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2020
- 2020-03-16 CN CN202020328245.8U patent/CN212057890U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562895A (en) * | 2022-01-26 | 2022-05-31 | 杭州制氧机集团股份有限公司 | Air precooling system |
| CN114562895B (en) * | 2022-01-26 | 2024-02-20 | 杭氧集团股份有限公司 | Air precooling system |
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