CN103601214A - Novel technology of recovering hydrogen and non-power ammonia in ammonia synthesis purge gas - Google Patents
Novel technology of recovering hydrogen and non-power ammonia in ammonia synthesis purge gas Download PDFInfo
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- CN103601214A CN103601214A CN201310430023.1A CN201310430023A CN103601214A CN 103601214 A CN103601214 A CN 103601214A CN 201310430023 A CN201310430023 A CN 201310430023A CN 103601214 A CN103601214 A CN 103601214A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention relates to a novel technology of recovering hydrogen and non-power ammonia in ammonia synthesis purge gas. Synthesis tower purge gas passes through a membrane hydrogen extraction device to recover the hydrogen with high concentration firstly. A part of exhaust gas after the membrane hydrogen extraction step is sent to the non-power ammonia to be used as power, and a part of the exhaust gas after the membrane hydrogen extraction step is sent to a three-gas boiler. Aqueous ammonia after the membrane hydrogen extraction step is sent to an ammonia rectifying tower to be further recovered. The synthesis purge gas in an ammonia synthesis system, ammonia rectification, and spherical tank purge gas are comprehensively recovered and reutilized, thus improving the synthetic ammonia production, and reducing effectively coal consumption and steam consumption in the ammonia synthesis system.
Description
Technical field
The present invention relates to a kind of novel process that hydrogen in synthetic ammonia relief gas and unpowered ammonia reclaim that reclaims, belong to chemical technique field.
Background technology
When referring to separated liquefied ammonia, gas and synthetic ammonia purge is dissolved in the H in liquefied ammonia
2, N
2, CH
4with gases such as Ar, when pressure decreased, from liquefied ammonia, desorb gas.One ton of NH of every production
3, on average to discharge 150 m
3the venting (different and different with state of the art according to the technique of each factory) of speeding of left and right, according to the state of the art of pertinent data and our the middle or small chemical fertilizer of country, one ton of liquid NH of average every production
3, in the venting of speeding of discharge, approximately contain the H of 120～156 kg
2.At present, with gas separation membrane, reclaim the H in synthetic ammonia relief gas
2more and more approved, domestic most fertilizer planies reclaim the H in synthetic ammonia relief gas with membrane separation unit
2, the H of recovery
2return to after compression ammonia synthesis system, improved synthetic ammonia output, received considerable economic and social benefit.But the synthetic membrane sepn of speeding to exit is reclaimed to the integrated technology process that hydrogen, ammonia rectifying, unpowered ammonia reclaims, and report is very few at present.
Summary of the invention
The object of the present invention is to provide a kind of novel process that hydrogen in synthetic ammonia relief gas and unpowered ammonia reclaim that reclaims, by the synthetic venting of speeding of synthesis ammonia system, ammonia rectifying, the spherical tank comprehensive reutilization of exitting of speeding, improve synthetic ammonia output, reduce synthesis ammonia system coal consumption and steam consumption.
The present invention realizes above-mentioned purpose like this:
The novel process step that hydrogen in the synthetic ammonia relief gas of recovery and unpowered ammonia reclaim is as follows,
1) by delivering to membrane sepn through the venting of speeding of synthetic ammonia synthetic tower, carry hydrogen production device, through film, carrying hydrogen water wash column absorbs after the ammonia in gas, the ammoniacal liquor producing is delivered to rectifying tower liquid ammonia recovery, gas after washing reclaims high concentration of hydrogen after film is carried hydrogen, and reduce the pressure that film is carried hydrogen production device, high concentration of hydrogen is delivered to the import of synthetic tower transformation system;
2) in step 1), film is carried tail gas after hydrogen and is delivered to respectively unpowered ammonia and reclaim spherical tank and do power and the burning of three gas boilers;
3) venting of speeding of step 2) overflowing from spherical tank is delivered to non-power ammonia recovery device and is reclaimed gas ammonia, and the gas ammonia of separating is delivered to ice maker, and tail gas is delivered to three gas boiler burnings.
In described step 1), to put forward hydrogen production device internal pressure be 9-11MPa to membrane sepn.
When being more than or equal to 180tt, the ammonia concn producing in described step 1) delivers to rectifying tower liquid ammonia recovery.
When the described volumetric concentration when hydrogen is more than or equal to 85%, film is carried hydrogen production device Pressure Drop to 1.2-2.0MPa, and hydrogen is delivered to transformation system.
Described step 2) in, deliver to three gas boilers pressure for 0.2-0.4MPa.
The venting of speeding of overflowing from ammonia spherical tank in described step 3) be take pressure and is delivered to non-power ammonia recovery device as 2.0-2.3MPa, then with 0.1-0.3MPa, gas ammonia is delivered to ice maker.
The invention has the advantages that: effectively improved ammoniacal liquor output, reduced coal consumption, steam consumption, has improved the stability of system pressure, has saved electric energy.
Accompanying drawing explanation
Fig. 1 is the hydrogen in the synthetic ammonia relief gas of recovery and the process flow sheet of unpowered ammonia.
Embodiment
embodiment 1
The venting of speeding of synthetic ammonia synthetic tower is delivered to membrane sepn and is carried hydrogen production device, the pressure that hydrogen production device is carried in controlling diaphragm separation is 9-11MPa, through film, carrying hydrogen import water wash column absorbs after the ammonia content in gas, when being more than or equal to 180tt, the ammonia concn producing delivers to rectifying tower rectifying liquid ammonia recovery, gas after washing, (wherein ammonia content≤200ppm) enters film and carries hydrogen, through carrying after hydrogen, when hydrogen volume concentration is up to 85%, reduce film and carry hydrogen production device pressure 1.2-2.0MPa and high concentration hydrogen is delivered to synthetic tower change system.The tail gas part that membrane sepn is carried hydrogen production device is delivered to unpowered ammonia and is reclaimed and do power, and a part be take pressure as 0.3MPa(methane content approximately 20% wherein) deliver to three gas boilers burnings; The venting of speeding of overflowing from ammonia spherical tank be take pressure as 2.15MPa(ammonia content 25% left and right) to deliver to non-power ammonia recovery device and reclaim gas ammonia, the gas ammonia of separating be take pressure and is delivered to ice maker import as 0.1-0.3MPa, and tail gas is delivered to three gas boilers burnings.
Adopt the benefit calculation of Technology of the present invention:
1. film is carried in hydrogen tripping device, resultant flow 2500M
3/ h calculates, and the hydrogen reclaiming has 2500*45%*90%(recovery hydrogen concentration to calculate by 90% concentration)=1012.5M
3/ h, the ammonia content that a time water absorption tower absorbs in gas is 1012.5/2200*24=11 ton.
2. unpowered ammonia reclaims: the speeding of every day exitted total ammonia amount by 540 tons of calculating: 540*108M of one day output
3/ ton (ammonia per ton is speeded high-volume) * 45%(volumetric concentration) * 0.772Kg(proportion)=20260.368Kg(closes 20.26 tons), the 2.4MPa quantity of steam that 20.26 tons of consumption are resolved in ammoniacal liquor rectifying is 20.26*3 ton/ton=60.78 ton, every day can steam saving 60.78 tons, benefit is 60.78*120 yuan/ton=7293.6 yuan/day, and the expense that ammoniacal liquor is made in ammonia rectifying every day is not counted in also and can produces the benefit of 7293.6 yuan.
Claims (6)
1. reclaim hydrogen in synthetic ammonia relief gas and a novel process for unpowered ammonia, it is characterized in that: comprise following processing step,
1) by delivering to membrane sepn through the venting of speeding of synthetic ammonia synthetic tower, carry hydrogen production device, through film, carrying hydrogen water wash column absorbs after the ammonia in gas, the ammoniacal liquor producing is delivered to rectifying tower liquid ammonia recovery, gas after washing reclaims high concentration of hydrogen after film is carried hydrogen, and reduce the pressure that film is carried hydrogen production device, high concentration of hydrogen is delivered to the import of synthetic tower transformation system;
2) in step 1), film is carried tail gas after hydrogen and is delivered to respectively unpowered ammonia and reclaim spherical tank and do power and the burning of three gas boilers;
3) venting of speeding of step 2) overflowing from spherical tank is delivered to non-power ammonia recovery device and is reclaimed gas ammonia, and the gas ammonia of separating is delivered to ice maker, and tail gas is delivered to three gas boiler burnings.
2. the hydrogen in the synthetic ammonia relief gas of recovery according to claim 1 and the novel process of unpowered ammonia, is characterized in that: in step 1), to put forward hydrogen production device internal pressure be 9-11MPa to membrane sepn.
3. the hydrogen in the synthetic ammonia relief gas of recovery according to claim 1 and the novel process of unpowered ammonia, is characterized in that: when the ammonia concn producing in step 1) is more than or equal to 180tt, deliver to rectifying tower liquid ammonia recovery.
4. the hydrogen in the synthetic ammonia relief gas of recovery according to claim 1 and the novel process of unpowered ammonia, it is characterized in that: in step 1) when the volumetric concentration of hydrogen is more than or equal to 85%, film is carried hydrogen production device Pressure Drop to 1.2-2.0 MPa, and hydrogen is delivered to synthetic tower change system.
5. the hydrogen in the synthetic ammonia relief gas of recovery according to claim 1 and the novel process of unpowered ammonia, is characterized in that: step 2) in deliver to three gas boilers pressure be 0.2-0.4MPa.
6. the hydrogen in the synthetic ammonia relief gas of recovery according to claim 1 and the novel process of unpowered ammonia, it is characterized in that: the venting of speeding of overflowing from ammonia spherical tank in step 3) be take pressure and delivered to non-power ammonia recovery device as 2.0-2.3MPa, then with 0.1-0.3MPa, gas ammonia is delivered to ice maker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310430023.1A CN103601214B (en) | 2013-09-22 | 2013-09-22 | A kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310430023.1A CN103601214B (en) | 2013-09-22 | 2013-09-22 | A kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia |
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| CN103601214A true CN103601214A (en) | 2014-02-26 |
| CN103601214B CN103601214B (en) | 2015-10-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016357A (en) * | 2015-07-21 | 2015-11-04 | 苏州市兴鲁空分设备科技发展有限公司 | Dehydration technology and device for unpowered ammonia recovery process |
| CN105565270A (en) * | 2016-02-04 | 2016-05-11 | 河南心连心化肥有限公司 | Device and process for recovering hydrogen in synthetic ammonia purge gas |
| CN115851332A (en) * | 2022-12-26 | 2023-03-28 | 新疆凯龙清洁能源股份有限公司 | Method and system for preparing natural gas from tail gas generated in hydrogen extraction of synthetic ammonia purge gas membrane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772852A (en) * | 1967-01-03 | 1973-11-20 | T Tamura | Process for the separation or concentration of gaseous mixture |
| CN1850586A (en) * | 2006-05-25 | 2006-10-25 | 山东明水化工有限公司 | Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank |
| CN102530990A (en) * | 2011-12-22 | 2012-07-04 | 天邦膜技术国家工程研究中心有限责任公司 | Method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and device |
-
2013
- 2013-09-22 CN CN201310430023.1A patent/CN103601214B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772852A (en) * | 1967-01-03 | 1973-11-20 | T Tamura | Process for the separation or concentration of gaseous mixture |
| CN1850586A (en) * | 2006-05-25 | 2006-10-25 | 山东明水化工有限公司 | Process and equipment for extracting hydrogen from air discharged from synthetic ammonia tank |
| CN102530990A (en) * | 2011-12-22 | 2012-07-04 | 天邦膜技术国家工程研究中心有限责任公司 | Method for recovering hydrogen and ammonia from synthetic ammonia purge gas by membrane separation-rectification integrated technology and device |
Non-Patent Citations (2)
| Title |
|---|
| 李建广: "采用膜分离技术回收合成氨驰放气", 《新技术新工艺》, no. 8, 25 August 2003 (2003-08-25), pages 45 - 46 * |
| 王慷: "无动力氨回收技术在合成氨厂的成功运用", 《四川化工》, vol. 13, no. 3, 15 June 2010 (2010-06-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016357A (en) * | 2015-07-21 | 2015-11-04 | 苏州市兴鲁空分设备科技发展有限公司 | Dehydration technology and device for unpowered ammonia recovery process |
| CN105016357B (en) * | 2015-07-21 | 2017-03-01 | 苏州市兴鲁空分设备科技发展有限公司 | Dewatering process in unpowered ammonia removal process and device |
| CN105565270A (en) * | 2016-02-04 | 2016-05-11 | 河南心连心化肥有限公司 | Device and process for recovering hydrogen in synthetic ammonia purge gas |
| CN115851332A (en) * | 2022-12-26 | 2023-03-28 | 新疆凯龙清洁能源股份有限公司 | Method and system for preparing natural gas from tail gas generated in hydrogen extraction of synthetic ammonia purge gas membrane |
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| CN103601214B (en) | 2015-10-07 |
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