CN103601214B - A kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia - Google Patents
A kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia Download PDFInfo
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- CN103601214B CN103601214B CN201310430023.1A CN201310430023A CN103601214B CN 103601214 B CN103601214 B CN 103601214B CN 201310430023 A CN201310430023 A CN 201310430023A CN 103601214 B CN103601214 B CN 103601214B
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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 present invention relates to a kind of novel process reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia and reclaim, synthetic tower periodic off-gases is first carried hydrogen production device through film, reclaims high concentration of hydrogen; A tail gas part after film carries hydrogen delivers to unpowered ammonia as power, and a part delivers to three gas boilers; Ammoniacal liquor after film carries hydrogen is delivered to ammonia rectifying tower and is reclaimed further; Synthesis ammonia system is synthesized periodic off-gases, ammonia rectifying, spherical tank periodic off-gases comprehensive reutilization, improve synthetic ammonia output, effectively reduce synthesis ammonia system coal consumption and steam consumption.
Description
Technical field
The present invention relates to a kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia and reclaim, belong to chemical technique field.
Background technology
Gas and synthetic ammonia purge is dissolved in the H in liquefied ammonia when referring to and be separated liquefied ammonia
2, N
2, CH
4with gases such as Ar, from liquefied ammonia, desorb gas when pressure decreases.Often produce one ton of NH
3, on average to discharge 150 m
3the periodic off-gases (according to the technique of each factory different with state of the art and different) of left and right, according to the state of the art of pertinent data with the middle or small chemical fertilizer of our country, on average every production one ton of liquid NH
3, the H approximately containing 120 ~ 156 kg in the periodic off-gases of discharge
2.At present, the H in synthetic ammonia periodic off-gases is reclaimed with gas separation membrane
2more and more approved, domestic most fertilizer plant membrane separation unit reclaims the H in synthetic ammonia periodic off-gases
2, the H of recovery
2return to ammonia synthesis system after compression, improve synthetic ammonia output, have received considerable economic and social benefit.But the integrated technology process that synthesis periodic off-gases membrane sepn recovery hydrogen, ammonia rectifying, unpowered ammonia reclaim is reported very few at present.
Summary of the invention
The object of the present invention is to provide a kind of technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia and reclaim, synthesis ammonia system is synthesized periodic off-gases, ammonia rectifying, spherical tank periodic off-gases comprehensive reutilization, improve synthetic ammonia output, reduce synthesis ammonia system coal consumption and steam consumption.
The present invention realizes above-mentioned purpose like this:
The processing step that hydrogen in recovery synthetic ammonia periodic off-gases and unpowered ammonia reclaim is as follows,
1) periodic off-gases through synthetic ammonia synthetic tower is delivered to membrane sepn and carry hydrogen production device, after the ammonia that film is carried in hydrogen water wash column absorption gas, the ammoniacal liquor produced delivers to rectifying tower liquid ammonia recovery, gas after washing is carried after hydrogen through film and is reclaimed high concentration of hydrogen, and reduce the pressure that film carries hydrogen production device, high concentration of hydrogen is delivered to the import of synthetic tower transformation system;
2) tail gas after film carries hydrogen in step 1) is delivered to unpowered ammonia recovery spherical tank respectively and is done power and the burning of three gas boilers;
3) step 2) deliver to non-power ammonia recovery device recovery gas ammonia from the periodic off-gases of spherical tank spilling, the gas ammonia separated delivers to ice maker, and tail gas delivers to three gas boilers burnings.
In described step 1), membrane sepn puies forward hydrogen production device internal pressure is 9-11MPa.
Rectifying tower liquid ammonia recovery is delivered to when the ammonia concn produced in described step 1) is more than or equal to 180tt.
Described when the volumetric concentration of hydrogen is more than or equal to 85%, film carries hydrogen production device Pressure Drop to 1.2-2.0MPa, and hydrogen is delivered to transformation system.
Described step 2) in deliver to the pressure of three gas boilers for 0.2-0.4MPa.
The periodic off-gases overflowed from ammonia spherical tank in described step 3) is that 2.0-2.3MPa delivers to non-power ammonia recovery device with pressure, then with 0.1-0.3MPa, gas ammonia is delivered to ice maker.
The invention has the advantages that: effectively improve ammoniacal liquor output, reduce coal consumption, steam consumption, improve the stability of system pressure, saved electric energy.
Accompanying drawing explanation
Fig. 1 is the process flow sheet reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia.
Embodiment
embodiment 1
The periodic off-gases of synthetic ammonia synthetic tower is delivered to membrane sepn and is carried hydrogen production device, it is 9-11MPa that controlling diaphragm is separated the pressure carrying hydrogen production device, after the ammonia content that film is carried in hydrogen import water wash column absorption gas, rectifying tower rectifying liquid ammonia recovery is delivered to when the ammonia concn produced is more than or equal to 180tt, gas after washing, (wherein ammonia content≤200ppm) enters film and carries hydrogen, after carrying 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 carries hydrogen production device is delivered to unpowered ammonia and is reclaimed and do power, and a part is 0.3MPa(wherein methane content about 20% with pressure) deliver to three gas boilers burnings; Be 2.15MPa(ammonia content about 25% from the periodic off-gases of ammonia spherical tank effusion with pressure) to deliver to non-power ammonia recovery device and reclaim gas ammonia, the gas ammonia separated is that 0.1-0.3MPa delivers to ice maker import with pressure, and tail gas delivers 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, then the hydrogen reclaimed 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 total ammonia amount of periodic off-gases of every day is by one day output, 540 tons of calculating: 540*108M
3/ ton (ammonia per ton is speeded high-volume) * 45%(volumetric concentration) * 0.772Kg(proportion)=20260.368Kg(closes 20.26 tons), it is 20.26*3 ton/ton=60.78 ton that 20.26 tons of 2.4MPa quantity of steams consumed are resolved in ammoniacal liquor rectifying, then 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 the benefit that also can produce 7293.6 yuan.
Claims (1)
1. one kind is reclaimed the technique of hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia, it is characterized in that: processing step is, the periodic off-gases of synthetic ammonia synthetic tower is delivered to membrane sepn and carries hydrogen production device, it is 9-11MPa that controlling diaphragm is separated the pressure carrying hydrogen production device, after the ammonia content that film is carried in hydrogen import water wash column absorption gas, rectifying tower rectifying liquid ammonia recovery is delivered to when the ammonia concn produced is more than or equal to 180tt, gas after washing, wherein ammonia content≤200ppm, enter film and carry hydrogen, after carrying hydrogen, when hydrogen volume concentration is up to 85%, reduce film to carry hydrogen production device pressure to 1.2-2.0MPa high concentration hydrogen delivered to synthetic tower change system, the tail gas part that membrane sepn carries hydrogen production device is delivered to non-power ammonia recovery device and is done power, a part is that 0.3MPa delivers to three gas boiler burnings with pressure, wherein methane content is about 20%, be 2.15MPa from the periodic off-gases of ammonia spherical tank effusion with pressure, ammonia content 25%, deliver to non-power ammonia recovery device and reclaim gas ammonia, the gas ammonia separated is that 0.1-0.3MPa delivers to ice maker import with pressure, tail gas delivers to three gas boilers burnings, can complete the technique reclaiming hydrogen in synthetic ammonia periodic off-gases and unpowered ammonia.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103601214A CN103601214A (en) | 2014-02-26 |
| CN103601214B true CN103601214B (en) | 2015-10-07 |
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| CN201310430023.1A Active 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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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115851332B (en) * | 2022-12-26 | 2023-07-04 | 新疆凯龙清洁能源股份有限公司 | Method and system for preparing natural gas from tail gas of hydrogen extraction from 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 |
|---|
| 无动力氨回收技术在合成氨厂的成功运用;王慷;《四川化工》;20100615;第13卷(第3期);第24页第1节，第2.1节，第25页第3段 * |
| 采用膜分离技术回收合成氨驰放气;李建广;《新技术新工艺》;20030825(第8期);第45-46页 * |
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| CN103601214A (en) | 2014-02-26 |
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