CN202229527U - Pre-cooling system of air separation device - Google Patents
Pre-cooling system of air separation device Download PDFInfo
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- CN202229527U CN202229527U CN2011202766178U CN201120276617U CN202229527U CN 202229527 U CN202229527 U CN 202229527U CN 2011202766178 U CN2011202766178 U CN 2011202766178U CN 201120276617 U CN201120276617 U CN 201120276617U CN 202229527 U CN202229527 U CN 202229527U
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Abstract
The utility model relates to a pre-cooling system of an air separation device, comprising a freezing unit, a water cooling tower and an air cooling tower, wherein a freezing machine is separated from a cooling water pipeline from the water cooling tower to the top of the air cooling tower, so that the lower part of the water cooling tower forms a closed circulation system with a cool water pump, the freezing machine and a valve, and the lower part of the water cooling tower is connected with the upper part of the air cooling tower by a cool water pump water inlet valve, the cool water pump and a cool water pump water outlet valve. By adopting the pre-cooling system, when the freezing machine has faults, the maintenance can be realized by only stopping the freezing machine, and the nitrogen amount to the water cooling tower is increased, so that the working capacity of the water cooling tower can be enhanced, the temperature of cooling water to the air cooling tower is reduced, the cooling effect of the air cooling tower is ensured, and further the air separation device can run safely and stably.
Description
Technical field
The utility model belongs to refrigeration technology field, is specifically related to a kind of pre-cooled system of air separation unit.
Background technology
Along with the continuous development of national economy, the fast development of industries such as particularly domestic metallurgy, petrochemical industry, Coal Chemical Industry increases rapidly the demand of air separation unit.Air separation unit is to be used for the device that separates airborne each component gas; Its workflow is: from the next compressed air of air compressor machine; After going molecular sieve to remove impurity such as moisture content, carbon dioxide, hydrocarbon after the chilldown system cooling; Portion of air directly is sent to the last tower of rectifying column, and another part then gets into decompressor behind swell refrigeration, is sent to tower down.Isolate oxygen, nitrogen, argon product according to oxygen, nitrogen, argon component boiling point difference.
Chilldown system with a very important position in air separation unit, the process organization of chilldown system and the performance of single devices are great to the performance impact of a whole set of air separation unit.Along with the increase of nitrogen use level, need to reduce the dirty nitrogen of the water-cooling tower in the precooling of denitrification water, cause the water-cooling tower cooling effect to descend, need set up refrigerator and satisfy technological requirement.In existing empty the branch in the chilldown system; Usually refrigerator is installed on the pipeline from water-cooling tower to air cooling tower top cooling water; Its workflow (see figure 1) is sent into air cooling tower middle part from the water that the recirculated water pipe network comes through general water supply pump pressurization for one, carries out heat exchange with air.Another strand recirculated water drenches down from the water-cooling tower top with device returning polluted nitrogen gas and carries out the heat exchange cooling; Send into the air cooling tower top through water supply pump, refrigerator reducing temperature twice; Carry out heat exchange with air, two strands of water mix the back cooling water is discharged by the air cooling tower bottom valve, returns circulation.In above-mentioned workflow, when refrigerator breaks down, cause cooling water temperature to raise, the air cooling tower cooling effectiveness reduces, and temperature rose when air went out air cooling tower, and hot and humid air will cause the molecular sieve adsorber excess load, influence the normal operation of air separation unit.
Summary of the invention
For solving the problem that exists in the above-mentioned prior art, the utility model provides a kind of air separation unit chilldown system, adopt this system after; When refrigerator breaks down; Can increase the water-cooling tower nitrogen amount, strengthen the water-cooling tower ability to work, reduce and remove the air cooling tower cooling water temperature; Guarantee the air cooling tower cooling effect, make that air separation unit can safe and stable operation.
The technical scheme of the utility model is: a kind of air separation unit chilldown system comprises: freezing unit; The top is provided with the upper entrance valve that supplies recirculated water to get into, and the bottom is provided with the water-cooling tower of the bottom inlet valve that supplies dirty nitrogen entering; Top is provided with air outlet slit; The bottom is provided with air intake; The middle part is provided with the recirculated water inlet; The bottom is provided with the air cooling tower of circulating water outlet, it is characterized in that: water-cooling tower 1 bottom is provided with refrigerator water inlet 17 and refrigerator delivery port 18, and refrigerator water inlet 17 forms an airtight circulatory system with refrigerator pump inlet valve 12, refrigerator water pump 13, refrigerator water pump water outlet valve 14, freezing unit 2, refrigerator outlet valve 15, cooling water outlet valve 16 and refrigerator delivery port 18 polyphones; Water-cooling tower 1 bottom is connected with air cooling tower 3 tops through water supply pump water intaking valve 6, water supply pump 4, water supply pump outlet valve 7.
Preferably, the water inlet of refrigerator is connected to the water-cooling tower bottom.
Preferably, the refrigerator delivery port is connected to the highest liquid level top, water-cooling tower bottom.
Recirculated water drenches down from the water-cooling tower top and goes out air separation unit returning polluted nitrogen gas and carries out the heat exchange cooling; Cooling water is lowered the temperature through refrigerator water pump to refrigerator from the water-cooling tower bottom; Return the water-cooling tower bottom again, cooling water temperature further reduces, and forms closed-cycle system; Then, through water supply pump the cooling water of water-cooling tower is delivered to air cooling tower top cooling air.When refrigerator breaks down, increase the nitrogen amount that gets into water-cooling tower, make the water-cooling tower leaving water temperature reach technological requirement, just can not influence the normal operation of air separation unit.
The beneficial effect of the utility model is:
1, cause that through water refrigerator cooling returns water-cooling tower again, the cooling water of water-cooling tower is directly carried out the secondary cooling water-cooling tower, reasonable in design, more convenient to operate.
2, empty branch is stable, and the nitrogen supply (NS) amount can be regulated.After adopting this chilldown system, solved in the former chilldown system when refrigerator breaks down, must stop the situation that the air separation unit operation could be handled.When freezing unit broke down, the refrigerator of only stopping transport can keep in repair, and guarantees the operation of air separation unit continous-stable, and sufficient nitrogen supply (NS) can be provided.
3, construction, easy to maintenance.This chilldown system as separate unit, can be transformed installation not having on the air separation unit chilldown system of freezing unit at present, and needn't stop when mounted.
4, water temperature control is stable.It is stable to adopt this chilldown system to control into the air cooling tower cooling water temperature, and refrigerator is setting value with the leaving water temperature, regulates the control water temperature automatically,, reduce the cooling water temperature fluctuation that water-cooling tower causes because of dirty nitrogen fluctuation.
5, energy-saving and cost-reducing.Refrigerator uses double-compressor, can realize the varying duty adjusting, and adjustable range is: 15%, 25%, 50%, 75%, 100%.According to the temperature of cooling water, regulate refrigeration work consumption automatically, unit is in power down mode all the time.
Description of drawings
Fig. 1 is the structural representation of prior art air separation unit chilldown system
Fig. 2 is the structural representation of the utility model air separation unit chilldown system
1, water-cooling tower 2, freezing unit 3, air cooling tower 4, water supply pump 5, general cold pump 6, water supply pump water intaking valve 7, water supply pump outlet valve 8, dirty nitrogen inlet valve 9, air cooling tower draining valve 10, air cooling tower water compensating valve 11, general cold water valve 12, general cold pump inlet valve 13 refrigerator water pumps 14 refrigerator pump inlet valves 15 refrigerator water pump water outlet valves 16 refrigerator cooling water outlet valves 17, refrigerator water inlet 18, the refrigerator delivery port of pumping
The specific embodiment
Further specify below in conjunction with 2 pairs of the utility model of accompanying drawing:
The water-cooling tower top is provided with the upper entrance valve that supplies recirculated water to get into, and the bottom is provided with the bottom inlet valve that supplies dirty nitrogen to get into; Air cooling tower top is provided with air outlet slit, and the bottom is provided with air intake, and the middle part is provided with the recirculated water inlet, and the bottom is provided with circulating water outlet.Water-cooling tower 1 bottom is provided with refrigerator water inlet 17 and refrigerator delivery port 18, and the water inlet of refrigerator is connected to the water-cooling tower bottom, and the refrigerator delivery port is connected to the highest liquid level top, water-cooling tower bottom; Refrigerator water inlet 17 forms an airtight circulatory system with refrigerator pump inlet valve 12, refrigerator water pump 13, refrigerator water pump water outlet valve 14, freezing unit 2, refrigerator outlet valve 15, cooling water outlet valve 16 and refrigerator delivery port 18 polyphones; Water-cooling tower 1 bottom is connected with air cooling tower 3 tops through water supply pump water intaking valve 6, water supply pump 4, water supply pump outlet valve 7.Recirculated water drenches down from water-cooling tower 1 top with the returning polluted nitrogen gas that gets into from dirty nitrogen inlet valve 8 and carries out the heat exchange cooling; Cooling water is lowered the temperature from water-cooling tower 1 bottom through refrigerator water pump 13 to freezing unit 2; Return water-cooling tower 1 bottom again, in this closed-cycle system, cooling water temperature further reduces; Then, through water supply pump 4 cooling water of water-cooling tower 1 is delivered to air cooling tower 3 tops cooling air.
Freezing unit uses double-compressor, can realize the varying duty adjusting, and adjustable range is: 15%, 25%, 50%, 75%, 100%.According to the temperature of cooling water, regulate refrigeration work consumption automatically, unit is in power down mode all the time.
When freezing unit broke down, the refrigerator of only stopping transport can keep in repair, and can remove the water-cooling tower nitrogen amount through increase; Strengthen the water-cooling tower ability to work; Reduce and remove the air cooling tower cooling water temperature, guarantee the air cooling tower cooling effect, make that air separation unit can safe and stable operation.
Claims (3)
1. an air separation unit chilldown system comprises: freezing unit; The top is provided with the upper entrance valve that supplies recirculated water to get into, and the bottom is provided with the water-cooling tower of the bottom inlet valve that supplies dirty nitrogen entering; Top is provided with air outlet slit; The bottom is provided with air intake; The middle part is provided with the recirculated water inlet; The bottom is provided with the air cooling tower of circulating water outlet; It is characterized in that: water-cooling tower (1) bottom is provided with refrigerator water inlet (17) and refrigerator delivery port (18), and refrigerator water inlet (17) forms an airtight circulatory system with refrigerator pump inlet valve (12), refrigerator water pump (13), refrigerator water pump water outlet valve (14), freezing unit (2), refrigerator outlet valve (15), cooling water outlet valve (16) and refrigerator delivery port (18) polyphone; Water-cooling tower (1) bottom is connected with air cooling tower (3) top through water supply pump water intaking valve (6), water supply pump (4), water supply pump outlet valve (7).
2. air separation unit chilldown system according to claim 1 is characterized in that: the water inlet of refrigerator is arranged on the water-cooling tower bottom.
3. air separation unit chilldown system according to claim 1 is characterized in that: the refrigerator delivery port is arranged on the highest liquid level top, water-cooling tower bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202766178U CN202229527U (en) | 2011-08-01 | 2011-08-01 | Pre-cooling system of air separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202766178U CN202229527U (en) | 2011-08-01 | 2011-08-01 | Pre-cooling system of air separation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202229527U true CN202229527U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202766178U Expired - Fee Related CN202229527U (en) | 2011-08-01 | 2011-08-01 | Pre-cooling system of air separation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202229527U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604306A (en) * | 2013-11-21 | 2014-02-26 | 七台河宝泰隆甲醇有限公司 | Cooling method of compressed air in methanol air separation plant |
| CN108267028A (en) * | 2018-02-24 | 2018-07-10 | 安阳九天精细化工有限责任公司 | Space division chilldown system |
| CN108626968A (en) * | 2018-03-21 | 2018-10-09 | 浙江大学 | Utilize the space division pre-cooler and its method of dew point indirect evaporative cooler |
-
2011
- 2011-08-01 CN CN2011202766178U patent/CN202229527U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604306A (en) * | 2013-11-21 | 2014-02-26 | 七台河宝泰隆甲醇有限公司 | Cooling method of compressed air in methanol air separation plant |
| CN103604306B (en) * | 2013-11-21 | 2015-11-11 | 七台河宝泰隆甲醇有限公司 | The methyl alcohol sky point compressed-air actuated cooling means in workshop |
| CN108267028A (en) * | 2018-02-24 | 2018-07-10 | 安阳九天精细化工有限责任公司 | Space division chilldown system |
| CN108626968A (en) * | 2018-03-21 | 2018-10-09 | 浙江大学 | Utilize the space division pre-cooler and its method of dew point indirect evaporative cooler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20150801 |
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| EXPY | Termination of patent right or utility model |