CN201997231U - Dual-pressure stage hydrolytic gas recovering system for urea waste water - Google Patents
Dual-pressure stage hydrolytic gas recovering system for urea waste water Download PDFInfo
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- CN201997231U CN201997231U CN2010206643914U CN201020664391U CN201997231U CN 201997231 U CN201997231 U CN 201997231U CN 2010206643914 U CN2010206643914 U CN 2010206643914U CN 201020664391 U CN201020664391 U CN 201020664391U CN 201997231 U CN201997231 U CN 201997231U
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Abstract
The utility model discloses a dual-pressure stage hydrolytic gas recovering system for urea waste water, which comprises a tail gas absorption tower. The system is provided with a backflow groove; the backflow groove is connected to a secondary circulating first cooling precooler by a pipeline with a valve; the secondary circulating first cooling precooler is connected to a secondary circulating first cooling tower; the secondary circulating first cooling tower is connected to a secondary circulating second cooling tower; the secondary circulating second cooling tower is connected to the tail gas absorption tower by the pipeline with a valve; the tail gas absorption tower is connected to an inert gas fine washer by the pipeline with a valve; the inert gas fine washer is connected to an inert gas cleaner by the pipeline with a valve; and the tail gas absorption tower is connected to an emptying header pipe. With the dual-pressure stage hydrolytic gas recovering system for the urea waste water, a gas phase after low-pressure absorption is sent to the tail gas absorption tower for normal-pressure absorption so as to lighten tail gas absorption load, therefore, the discharge is reduced, and the ammonia content in the air is decreased.
Description
Technical field:
The utility model relates to the urea production equipment field, specifically a kind of pair of pressure stage urea waste water hydrolysis gas recovery system.
Background technology:
Urea can produce the waste gas that contains ammonia in a large number as chemical fertilizer commonly used in its production process, therefore needs reclaiming clean equipment.The thematic project that domestic existing urea depth hydrolysis device is the treasury bonds investment environmental protection exists some defectives and deficiency, remains further to be improved.In this device, the tail gas that the backflash gas phase is sent to after middle pressure tail gas behind tail gas absorber and the fine purifiation and the low pressure absorption absorbs simultaneously.Because the hydrolysis gaseous pressure is 0.9Mpa, ammonia content is about 72% (V), after disposable decompression is normal pressure, be difficult to thoroughly absorb fully, a large amount of ammonia-containing exhausts enter atmosphere, not only cause waste, and cause in the regional air ammonia highly seasoned, the masses are on every side exerted an influence, cause many negative effects of environmental protection, social image.
Summary of the invention:
Low for solving the existing apparatus organic efficiency, ammonia is highly seasoned in the regional air, waste and environmental issue, the utility model provides a kind of pair of pressure stage urea waste water hydrolysis gas recovery system, hydrolysis gas reclaims new technology when being containing ammonia, urea waste water and handling of producing in a kind of urea production, is fit to nitrogen fertilizer production enterprise and uses, and can reclaim ammoniacal liquor simultaneously more, reduce production costs, cut the waste and atmosphere pollution.
The technical solution adopted in the utility model is:
Two pressure stage urea waste water hydrolysis gas recovery systems, comprise tail gas absorber, it is characterized in that: have a backflash, backflash is connected to the secondary cycle first cold forecooler by the pipeline of band valve, the secondary cycle first cold forecooler, secondary cycle first cooling tower, secondary cycle second cooling tower connect successively, and the delivery outlet of secondary cycle second cooling tower is connected to tail gas absorber by the pipeline of band valve; Inert gas purge device, inert gas fine purifiation device connect successively by the pipeline that has valve, and the gas vent of inert gas fine purifiation device is attached to tail gas absorber by pipeline, and the gas outlet of tail gas absorber is connected to the emptying house steward.
Described pair of pressure stage urea waste water hydrolysis gas recovery system is characterized in that: described backflash, the secondary cycle first cold forecooler, secondary cycle first cooling tower, secondary cycle second cooling tower, tail gas absorber, inert gas fine purifiation device, inert gas purge device are the airtight hollow container of tower.
The described secondary cycle first cold forecooler, secondary cycle first cooling tower, the secondary cycle second cooling tower inner atmosphere are pressed and are remained 0.25Mpa, and described tail gas absorber inner atmosphere is pressed and is normal pressure.
Advantage of the present utility model is:
Two pressure stage urea waste water hydrolysis gas recovery systems that the utility model provides, can allow hydrolysis gas and two fens gas converge, after the secondary cycle first cold forecooler, secondary cycle first cooling tower, secondary cycle second cooling tower cool off the low pressure absorption respectively, going tail gas absorber to carry out normal pressure again absorbs, the increased pressure favorable for absorption, directly to be decompressed to the normal pressure good absorbing effect a lot of for absorptance under low pressure stage 0.25Mpa pressure, and absorption efficiency improves more than 20%; At a plurality of cooling devices of low pressure stage serial, absorb the space and strengthen, gas temperature is progressively cooled off, and absorbs more complete; Gas phase after low pressure absorbs is delivered to tail gas absorber and is carried out normal pressure absorption can alleviating tail suction load, thereby reduces discharge capacity, reduces ammonia content in the atmosphere; Economic benefit, environmental benefit are remarkable.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
The specific embodiment:
Two pressure stage urea waste water hydrolysis gas recovery systems, comprise tail gas absorber 7, has a backflash 1, backflash 1 is connected to the secondary cycle first cold forecooler 2 by the pipeline of band valve, the secondary cycle first cold forecooler 2 is connected to secondary cycle first cooling tower 3, secondary cycle first cooling tower 3 is connected to secondary cycle second cooling tower 4, secondary cycle second cooling tower 4 is connected to tail gas absorber 7 by the pipeline of band valve, tail gas absorber 7 is connected to inert gas fine purifiation device 6 by the pipeline of band valve, inert gas fine purifiation device 6 is connected to inert gas purge device 5 by the pipeline of band valve, and tail gas absorber 7 is connected to emptying house steward 8.
Described backflash 1, the secondary cycle first cold forecooler 2, secondary cycle first cooling tower 3, secondary cycle second cooling tower 4, tail gas absorber 7, inert gas fine purifiation device 4, inert gas purge device 5 are the airtight hollow container of tower.
The described secondary cycle first cold forecooler 2, secondary cycle first cooling tower 3, secondary cycle second cooling tower 4 inner atmosphere are pressed and are remained 0.25Mpa, and described tail gas absorber 7 inner atmosphere are pressed and are normal pressure.
Claims (2)
1. two pressure stage urea waste water hydrolysis gas recovery systems, comprise tail gas absorber, it is characterized in that: have a backflash, backflash is connected to the secondary cycle first cold forecooler by the pipeline of band valve, the secondary cycle first cold forecooler, secondary cycle first cooling tower, secondary cycle second cooling tower connect successively, and the delivery outlet of secondary cycle second cooling tower is connected to tail gas absorber by the pipeline of band valve; Inert gas purge device, inert gas fine purifiation device connect successively by the pipeline that has valve, and the gas vent of inert gas fine purifiation device is attached to tail gas absorber by pipeline, and the gas outlet of tail gas absorber is connected to the emptying house steward.
2. according to claim 1 pair of pressure stage urea waste water hydrolysis gas recovery system is characterized in that: described backflash, the secondary cycle first cold forecooler, secondary cycle first cooling tower, secondary cycle second cooling tower, tail gas absorber, inert gas fine purifiation device, inert gas purge device are the airtight hollow container of tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206643914U CN201997231U (en) | 2010-12-17 | 2010-12-17 | Dual-pressure stage hydrolytic gas recovering system for urea waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206643914U CN201997231U (en) | 2010-12-17 | 2010-12-17 | Dual-pressure stage hydrolytic gas recovering system for urea waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201997231U true CN201997231U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206643914U Expired - Fee Related CN201997231U (en) | 2010-12-17 | 2010-12-17 | Dual-pressure stage hydrolytic gas recovering system for urea waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201997231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603443A (en) * | 2019-02-15 | 2019-04-12 | 陕西陕化煤化工集团有限公司 | The recyclable device of ammonia in a kind of mesolow emptying gas |
-
2010
- 2010-12-17 CN CN2010206643914U patent/CN201997231U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603443A (en) * | 2019-02-15 | 2019-04-12 | 陕西陕化煤化工集团有限公司 | The recyclable device of ammonia in a kind of mesolow emptying gas |
| CN109603443B (en) * | 2019-02-15 | 2021-08-03 | 陕西陕化煤化工集团有限公司 | Recovery unit of ammonia among well low pressure unloading gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20121217 |