CN215002541U - Air separation precooling system - Google Patents
Air separation precooling system Download PDFInfo
- Publication number
- CN215002541U CN215002541U CN202120512990.2U CN202120512990U CN215002541U CN 215002541 U CN215002541 U CN 215002541U CN 202120512990 U CN202120512990 U CN 202120512990U CN 215002541 U CN215002541 U CN 215002541U
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- water
- cooling tower
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Air separation precooling system mainly includes air cooling tower and water cooling tower, the top of air cooling tower is equipped with air outlet, and air outlet's below is equipped with air cooling tower mist catcher, is equipped with the drain in air cooling tower's bottom, and its inside is equipped with upper water-locator and lower extreme water-locator respectively, is equipped with upper portion cooling water pipeline and normal atmospheric temperature circulating water pipeline with pipe connection to two water-locator tops respectively in one side of upper end water-locator and lower extreme water-locator, the utility model discloses cancelled the design of supplying water to the water cooling tower from circulating water supply house steward, utilized air cooling tower bottom to press the drainage to supply water for the water cooling tower with pressure, solved because of the required water supply pressure height of water cooling tower leads to the high problem of overall system water supply pressure, can reduce whole recirculating cooling water system's water supply pressure at least, reduced recirculating cooling water system's pump lift.
Description
Technical Field
The utility model belongs to the technical field of empty separating, concretely relates to empty precooling system that divides.
Background
The air precooling system is an important component of the air separation equipment, is arranged at the outlet of the air compressor and is used for reducing the temperature and the water content of the air entering the molecular sieve adsorber. The pre-cooling system generally includes an air cooling column and a water cooling column. The compressed air is cooled by normal-temperature circulating water and low-temperature cooling water in the air cooling tower. Wherein the low-temperature cooling water is obtained by a water cooling tower and a water chilling unit. In a conventional air separation precooling system, the pressure of an air cooling tower is higher, and circulating cooling water can enter the air cooling tower after being pressurized. After cooling capacity is provided, the circulating cooling water entering the air cooling tower directly returns to the circulating cooling water return main pipe after throttling and pressure reduction, and energy is wasted. The water inlet pipe of the water-cooling tower is connected to a water supply main pipe of a circulating water system, and circulating cooling water enters the water-cooling tower by the pressure of the circulating cooling water. The water cooling tower needs higher water supply pressure which is the bottleneck of the water supply pressure of the whole circulating cooling water system, so that the water supply pressure of the system is higher, the lift of the needed circulating water pump is higher, and the energy consumption of the system is higher.
The utility model aims at overcoming prior art not enough, providing a modified flow, utilizing the area of empty precooling system cavity cold tower of dividing to press the drainage as the water cooling tower water supply, solved at present because of the required water supply pressure height of water cooling tower and lead to the high problem of overall system water supply pressure, can reduce overall system's water supply pressure, reduce circulating water pump lift. In addition, the flow also recovers a part of energy of the pressurized drainage of the air cooling tower. The utility model has the characteristics of the simple easy implementation of flow, energy-conserving effect is obvious, not only is limited to newly-built air separation plant, to being on a journey the device, also can carry out energy-conserving optimization through simple transformation.
The patent of chinese utility model with publication number CN208751135U discloses an air separation precooling system, which adopts a mode of combining primary cooling of a gas-liquid heat exchanger and secondary cooling of an air cooling tower. The method aims at the condition that the air compressor unit is provided with end cooling and the air cooling tower only has one strand of low-temperature cooling water. The utility model discloses a chinese utility model patent of publication No. CN108020096A discloses "a empty precooling system that divides of semi-open type", with the upper segment lower part of air cooling tower and water cooling tower inlet tube intercommunication, can guarantee that cooling water independently circulates. The method aims at the condition that the lower part of the upper section of the air cooling tower is provided with a central cylinder structure. The two designs both need to replenish water for the precooling system, and can not reduce the water supply pressure of the circulating cooling water system.
Disclosure of Invention
The utility model discloses cancelled the design that supplies water to the water-cooling tower from water main, utilized the air cooling tower bottom area to press the drainage to supply water as the water-cooling tower, solved because of the high problem that leads to overall system water supply pressure height of the required water pressure that supplies of water-cooling tower, can reduce whole recirculating cooling water system's water supply pressure at least, reduced circulating water pump energy consumption to the air cooling tower has been retrieved and has been pressed some energy of drainage.
The purpose of the utility model is achieved by the following technical proposal,
an air separation pre-cooling system mainly comprises an air cooling tower and a water cooling tower, wherein the top of the air cooling tower is provided with an air outlet, an air cooling tower mist catcher is arranged below the air outlet, the bottom of the air cooling tower is provided with a sewage draining outlet, two sections of packing chambers are respectively arranged in the filter, an upper section water distributor and a lower end water distributor are arranged on each section of packing chamber, an upper cooling water pipeline and a normal temperature circulating water pipeline which are connected to the upper parts of the two water distributors by pipelines are respectively arranged at one side of the upper water distributor and one side of the lower water distributor, an air distributor is also arranged below the lower water distributor, one side of the air distributor is provided with an air inlet, a water collecting tank is arranged at the bottom of the tower below the air distributor, one side of the water collecting tank is respectively provided with two pipelines, one of the pipelines is a circulating pipeline which can lead water to a return water pipeline of the air separation circulating cooling water system, and the other pipeline is a water outlet pipeline which is connected to the water cooling tower.
Preferably, the method comprises the following steps: the water cooling tower is characterized in that a gas outlet is formed in the upper portion of the water cooling tower, a drain outlet of the water cooling tower is formed in the bottom of the water cooling tower, a spray catcher of the water cooling tower is arranged below the spray catcher of the water cooling tower, a water inlet pipeline is arranged on one side of the spray catcher of the water cooling tower and connected with a water outlet pipeline, a water collecting tank of the water cooling tower is further arranged on the bottom of the water cooling tower, a dry gas inlet of the water cooling tower is further arranged on one side of the upper portion of the water collecting tank of the water cooling tower, two pipelines are arranged on the bottom of the water collecting tank, one pipeline is a self-circulation pipeline, the other pipeline is a water outlet pipeline, and water is connected with a cooling water pipeline through a water outlet pipeline through a small water pump and a water cooling unit.
Preferably, the method comprises the following steps: the normal temperature circulating water pipeline pumps water into the lower section water distributor through a big water pump.
The beneficial effects of the utility model are that, cancelled the design that supplies water to the water cooling tower from circulating water supply main, adopted the air cooling tower bottom drainage to advance the water cooling tower branch road and supply water for the water cooling tower, solved because of the required water supply pressure height of water cooling tower leads to the high problem of overall system water supply pressure, can reduce overall system's water supply pressure, reduce recirculating cooling water system's pump lift. In addition, a part of energy of the pressurized drainage of the air cooling tower is recovered, and the purposes of energy conservation and consumption reduction are achieved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings: as shown in fig. 1, an air separation pre-cooling system mainly comprises an air cooling tower 2 and a water cooling tower 13, wherein an air outlet 1 is arranged at the top of the air cooling tower 2, an air cooling tower mist catcher 3 is arranged below the air outlet 1, a drain outlet 18 is arranged at the bottom of the air cooling tower 2, two sections of packing chambers are respectively arranged in the air cooling tower 2, an upper section water distributor 4 and a lower section water distributor 5 are arranged on each section of packing chamber, one side of the upper section water distributor 4 and one side of the lower section water distributor 5 are respectively connected with an upper cooling water pipeline 9 and a normal temperature circulating water pipeline 21 which are arranged above the two water distributors through pipelines, an air distributor 7 is also arranged below the lower section water distributor 5, one side of the air distributor is provided with an air inlet 6, a water collecting tank 8 is arranged at the bottom of the air distributor, one side of the water collecting tank is respectively provided with two pipelines, one of which is a circulating pipeline 19 and can lead water to a return water pipeline of an air separation circulating cooling water system, the other pipeline is a water outlet pipeline 20 which is connected to the water cooling tower 13, an air outlet hole 23 is arranged above the water cooling tower 13, the bottom of the water cooling tower is provided with a sewage draining outlet 22, a cooling tower mist catcher 14 is arranged below the air outlet 23, a water-cooling tower water distributor 15 is arranged below the cooling tower mist catcher 14, a water inlet pipeline 24 is arranged on one side of the cooling tower mist catcher, the water inlet pipeline 24 is connected with the water outlet pipeline 20, the bottom of the water cooling tower 13 is also provided with a water cooling tower collecting tank 17, a water-cooling tower dry gas inlet 16 is arranged on one side above a water-cooling tower collecting tank 17, two pipelines are arranged at the bottom of the collecting tank, one of the pipelines is a self-circulation pipeline, the other pipeline is a water outlet pipeline 25, water is connected with the cooling water pipeline 9 through the water outlet pipeline 25 through a small water pump 12 and a water cooling unit 11, and the normal-temperature circulation water pipeline 21 pumps the water into the lower-section water distributor through a large water pump 10.
The specific implementation method comprises the following steps:
the utility model discloses mainly include air cooling tower 2 and water cooling tower 13. The air cooling tower 2 is a filler type cooling tower, two sections of fillers are designed, and two paths of water are fed. One path is low-temperature cooling water 9, and the other path is normal temperature circulating water 21. The water cooling tower 13 is a filler type water cooling tower, and a water inlet and drainage water cooling tower 20 at the bottom of the air cooling tower is cooled by tower inlet dry gas 16 in the tower and then flows out, and is pressurized by a small water pump 12 and further cooled by a water chilling unit 11 and then is sent to a cooling water inlet at the upper part of the air cooling tower 2. The normal temperature circulating water 21 is pressurized by the big water pump 10 and then directly enters the middle part of the air cooling tower 2, and is mixed with the cooling water flowing down from the upper section of the air cooling tower 2 to be used as the water for the lower section of the air cooling tower 2.
The wet hot air from the turbine compressor enters the air cooling tower 2 from an air inlet 6 at the lower part of the air cooling tower 2, and is in direct contact with water through countercurrent to perform heat and mass exchange at the lower section of the air cooling tower 2, so that the air is primarily cooled; when the air rises to the upper section of the air cooling tower 2, the air and the cooling water 9 perform further heat and mass exchange, and finally the air is sent to a downstream molecular sieve purification system after the purposes of temperature reduction and dehumidification are achieved. In order to prevent the mist-like free water from being brought into a subsequent molecular sieve purification system when the air is discharged from the tower, the top of the air cooling tower 2 is provided with a mist catcher 3. The upper part in the air cooling tower is provided with a water distributor 4, and the middle part is provided with a water distributor 5. The air inlet 6 of the air cooling tower 2 is provided with an air distributor 7. In order to prevent the dry gas 16 in the water cooling tower from taking away the mist water drops when the gas leaves the tower, and increase water consumption, the top of the water cooling tower 13 is provided with a mist catcher.
The low-temperature cooling water 9 of the air cooling tower 2 is connected with the bottom of the water cooling tower 13 in a drainage way, and a small water pump 12, a water chilling unit 11 and a flowmeter are arranged on a pipeline, and the small water pump is used for standby. The middle circulating water 21 of the air cooling tower 2 comes from a circulating water supply system, and a large water pump 10 and a flowmeter are arranged on a pipeline and are used for standby. The water inlet of the water cooling tower 13 is provided by a water inlet and drainage tower 20 at the bottom of the air cooling tower, and the redundant drainage of the air cooling tower 2 is returned to a circulating water system 19 by the drainage at the bottom of the air cooling tower. The bottom of the air cooling tower 2 is provided with a sewage outlet 18, and the bottom of the water cooling tower is provided with a sewage outlet 22. And a liquid level control loop is arranged on a branch of the water inlet and drainage tower 20 at the bottom of the air cooling tower, and is used for controlling the water quantity and maintaining the liquid level of the water cooling tower 13 to be stable. A liquid level control loop is arranged on the 19 branch of the air cooling tower bottom water drainage and circulation water system to maintain the liquid level of the air cooling tower 2 to be stable.
The large water pump 10 of the air cooling tower 2 can be provided with a frequency converter, and the small water pump 12 of the water cooling tower 13 can be provided with a frequency converter to adjust the reasonable consumption of the low-temperature cooling water 9 at the top of the air cooling tower 2 and the middle normal-temperature circulating water 21.
The foregoing is directed to embodiments of the present invention. However, any modification, equivalent replacement or improvement made within the spirit and principle of the present invention is within the protection scope of the present invention.
Claims (3)
1. The utility model provides an empty precooling system that divides mainly includes air cooling tower and water-cooling tower, its characterized in that: the air cooling tower is characterized in that an air outlet is formed in the top of the air cooling tower, an air cooling tower mist catcher is arranged below the air outlet, a drain outlet is formed in the bottom of the air cooling tower, two sections of packing chambers are arranged in the air cooling tower, an upper water distributor and a lower water distributor are arranged on each section of packing chamber, an upper cooling water pipeline and a normal-temperature circulating water pipeline which are connected to the upper portions of the two water distributors through pipelines are arranged on one sides of the upper water distributor and the lower water distributor respectively, an air distributor is further arranged below the lower water distributor, an air inlet is formed in one side of the air distributor, a water collecting tank is arranged on the bottom of the air distributor below the water distributor, two pipelines are arranged on one side of the water collecting tank respectively, one pipeline is a circulating pipeline and can lead water to a return water pipeline of an air-separation circulating cooling water system, the other pipeline is a water outlet pipeline, and the pipelines are connected to the water cooling tower.
2. The spatial division pre-cooling system according to claim 1, wherein: the water cooling tower is characterized in that a gas outlet is formed in the upper portion of the water cooling tower, a drain outlet of the water cooling tower is formed in the bottom of the water cooling tower, a spray catcher of the water cooling tower is arranged below the spray catcher of the water cooling tower, a water inlet pipeline is arranged on one side of the spray catcher of the water cooling tower and connected with a water outlet pipeline, a water collecting tank of the water cooling tower is further arranged on the bottom of the water cooling tower, a dry gas inlet of the water cooling tower is further arranged on one side of the upper portion of the water collecting tank of the water cooling tower, two pipelines are arranged on the bottom of the water collecting tank, one pipeline is a self-circulation pipeline, the other pipeline is a water outlet pipeline, and water is connected with a cooling water pipeline through a water outlet pipeline through a small water pump and a water cooling unit.
3. The spatial division pre-cooling system according to claim 1, wherein: the normal temperature circulating water pipeline pumps water into the lower section water distributor through a big water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120512990.2U CN215002541U (en) | 2021-03-11 | 2021-03-11 | Air separation precooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120512990.2U CN215002541U (en) | 2021-03-11 | 2021-03-11 | Air separation precooling system |
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| Publication Number | Publication Date |
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| CN215002541U true CN215002541U (en) | 2021-12-03 |
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| CN202120512990.2U Active CN215002541U (en) | 2021-03-11 | 2021-03-11 | Air separation precooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944806A (en) * | 2021-03-11 | 2021-06-11 | 杭州制氧机集团股份有限公司 | Air separation pre-cooling system |
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2021
- 2021-03-11 CN CN202120512990.2U patent/CN215002541U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944806A (en) * | 2021-03-11 | 2021-06-11 | 杭州制氧机集团股份有限公司 | Air separation pre-cooling system |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Hang Yang Group Co.,Ltd. Address before: 799 Xiangfu Road, Qingshanhu street, Lin'an City, Hangzhou City, Zhejiang Province Patentee before: Hangzhou oxygen generator group Co.,Ltd. |