CN103673504A - Pressure swing adsorption decarburization gas full-recovery method - Google Patents
Pressure swing adsorption decarburization gas full-recovery method Download PDFInfo
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- CN103673504A CN103673504A CN201210338104.4A CN201210338104A CN103673504A CN 103673504 A CN103673504 A CN 103673504A CN 201210338104 A CN201210338104 A CN 201210338104A CN 103673504 A CN103673504 A CN 103673504A
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Abstract
A pressure swing adsorption decarburization gas full-recovery method is based on the vacuumizing process and the purging process in a pressure swing adsorption decarburization device. CO2 gas and bleeding gas in the two processes are all fed to a carbon dioxide compressor to be compressed, the CO2 gas and bleeding gas are cooled through a gas-gas heat exchanger or a lithium bromide water cooler or an ammonia cooler after hydrogen sulfide is removed, the cooled gas enters a gas-liquid separator, and non-condensable gas flashed off from the top of the separator enters a three-section inlet of a feed gas compressor; liquid CO2 separated from the bottom of the separator returns to the gas-gas heat exchanger, after heat exchange, the CO2 gas returns to the carbon dioxide compressor or is heated through a heater, and then the CO2 gas enters urea production equipment. Surplus CO2 gas is directly filled into CO2 products after passing through the gas-liquid separator, and then CO2 finished products are obtained. With the method, all the bleeding gas of the vacuumizing process and the purging process can be recovered, and the method has the advantages of saving effective gas and reducing air pollution.
Description
Technical field
The invention belongs to gas recovery techniques, be specifically related to a kind of full method reclaiming of pressure swing adsorption decarbonization gas.
Background technology
At present, the decarburization of synthetic ammonia/urea plant conversion gas is the important procedure that synthetic ammonia, methanol feedstock gas purify, in the conversion gas of synthetic ammonia, methanol production, and the CO of conversion gas
2content is 12%～28%, before entering synthesis procedure, must first be removed.
The feature of pressure swing adsorption technique technology is mainly physical absorption.Pressure-changeable adsorption decarbonization device used has sweeping process and vacuumizes flow process: the suitable venting of the rectifying section emptying of (1) sweeping process, one, two sections of recovery of inverse put (the whole emptying for synthetic ammonia or methyl alcohol etc. without urea plant), emptying after purging one, two front recovery; Clean-up stage is along putting purging, inverse put emptying; The one section of suitable emptying 0.08Mpa to 0.07MPa purging, inverse put 0.07 to 0.03MPa goes gas product to reclaim (for synthetic ammonia installation emptying), purges 0.03 to 0.02MPa emptying; Purging two sections goes after surge tank, to remove one section of purging, inverse put 0.124MPa to 0.025MPa emptying along putting 0.35MPa to 0.125MPa.(2) vacuumize one section of flow process along emptying 0.082MPa to 0.05MPa, inverse put reclaims 0.05MPa to 0.020MPa, vacuumizes 0.02MPa to-0.055MPa; Two sections along putting one section of pre-loading, and inverse put emptying 0.028MPa to 0.002MPa vacuumizes 0.002MPa to-0.066MPa.
Generally, enter the CO that pressure-swing absorption apparatus removes
2a part enters CO
2compressor is synthetic for urea or methyl alcohol, and the direct emptying of another part, has not only wasted resource but also polluted atmosphere.
Summary of the invention
The object of the invention is in order to provide a kind of pressure swing adsorption decarbonization gas the full method reclaiming, the method can realize whole recovery that pressure-swing absorption apparatus is dropped a hint, and not only saves available gas but also reduce the pollution to atmosphere.
The object of the present invention is achieved like this: a kind of full method reclaiming of pressure swing adsorption decarbonization gas, comprises the following steps:
1) gas collection compression: will vacuumize, purge CO in two kinds of flow processs in pressure-changeable adsorption decarbonization device
2gas and drop a hint and all send to carbon-dioxide gas compressor and compress;
2) Compressed Gas is processed: the carbon dioxide through overcompression is removed to hydrogen sulfide;
3) refrigerated separation: remove gas after hydrogen sulfide and enter gas-liquid separator through supercooling is laggard again, from separator top, flash off containing H
2, N
2, CO, CH
4deng incoagulable gas, go three sections of imports of feed gas compressor; The liquid CO separating from separator bottom
2return to gas-gas heat exchanger, after heat exchange, obtain CO
2gas returns after carbon-dioxide gas compressor or direct heater via heating, removes urea plant; For CO more than needed
2gas directly removes CO after gas-liquid separator
2product is filling, obtains CO
2finished product.
Described CO
2gas and drop a hint for pressure-swing absorption apparatus vacuumize in flow process along venting, inverse put gas and vacuumize resolution gas, the suitable venting in sweeping process, sweep gas and inverse put gas.
Describedly go out CO
2the gas temperature of compressor is 125 ℃, and pressure is 2～14.1MPa.
Gas in step 3) refers to that through supercooling gas carries out cooling through gas-gas heat exchanger, lithium bromide water cooler or ammonia cooler again.
The full method reclaiming of pressure swing adsorption decarbonization gas provided by the invention, its advantage is:
1, reclaim the available gas account for conversion gas total amount 2% and again arrive synthesis ammonia system, the output of increase synthetic ammonia.
2, CO more than needed
2as doing finished product, sell, and GAS QUALITY is higher.
3, CO
2realize zero-emission, reduce carbon emission.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is process chart of the present invention.
The specific embodiment
Embodiment 1
To in pressure-changeable adsorption decarbonization device, vacuumize, purge CO in two kinds of flow processs
2gas is all sent to carbon-dioxide gas compressor compression with dropping a hint, the gas temperature going out after three sections or four sections, compressor is 125 ℃, pressure is 2-14.1MPa, deviate from the gas after hydrogen sulfide, pass through gas-gas heat exchanger again, ammonia cooler is cooling, cooled gas enters gas-liquid separator, from separator top, flash off containing H
2, N
2, CO, CH
4deng incoagulable gas, go three sections of imports of feed gas compressor; The liquid CO that separator bottom separates
2return to gas-gas heat exchanger, the CO after heat exchange
2gas returns carbon-dioxide gas compressor.For CO more than needed
2gas directly removes CO after gas-liquid separator
2product is filling, obtains CO
2finished product.
Embodiment 2
To in pressure-changeable adsorption decarbonization device, vacuumize, purge CO in two kinds of flow processs
2gas and drop a hint and all send to carbon-dioxide gas compressor and compress, the gas temperature going out after five sections, compressor is 125 ℃, pressure is 2～14.1MPa, deviate from the gas after hydrogen sulfide, pass through again gas-gas heat exchanger, lithium bromide water cooler is cooling, cooled gas enters gas-liquid separator, from separator top, flash off containing H
2, N
2, CO, CH
4deng incoagulable gas, go three sections of imports of feed gas compressor; The liquid CO that separator bottom separates
2return to gas-gas heat exchanger, the CO after heat exchange
2the heating of gas heater via, the gas temperature after heating, between 100 ℃-110 ℃, removes urea plant.For CO more than needed
2gas directly removes CO after gas-liquid separator
2product is filling, obtains CO
2finished product.
CO in above-described embodiment
2gas and drop a hint for pressure-swing absorption apparatus vacuumize in flow process along venting, inverse put gas and vacuumize resolution gas, the suitable venting in sweeping process, sweep gas and inverse put gas.
Claims (4)
1. the method that pressure swing adsorption decarbonization gas reclaims entirely, is characterized in that: comprise the following steps:
1) gas collection compression: will vacuumize, purge CO in two kinds of flow processs in pressure-changeable adsorption decarbonization device
2gas and drop a hint and all send to carbon-dioxide gas compressor and compress;
2) Compressed Gas is processed: the carbon dioxide through overcompression is removed to hydrogen sulfide;
3) refrigerated separation: remove gas after hydrogen sulfide and enter gas-liquid separator through supercooling is laggard again, from separator top, flash off containing H
2, N
2, CO, CH
4deng incoagulable gas, go three sections of imports of feed gas compressor; The liquid CO separating from separator bottom
2return to gas-gas heat exchanger, after heat exchange, obtain CO
2gas returns after carbon-dioxide gas compressor or direct heater via heating, removes urea plant; For CO more than needed
2gas directly removes CO after gas-liquid separator
2product is filling, obtains CO
2finished product.
2. the full method reclaiming of pressure swing adsorption decarbonization gas according to claim 1, is characterized in that: described CO
2gas and drop a hint for pressure-swing absorption apparatus vacuumize in flow process along venting, inverse put gas and vacuumize resolution gas, the suitable venting in sweeping process, sweep gas and inverse put gas.
3. the full method reclaiming of pressure swing adsorption decarbonization gas according to claim 1, is characterized in that: described in go out CO
2the gas temperature of compressor is 125 ℃, and pressure is 2～14.1MPa.
4. the full method reclaiming of pressure swing adsorption decarbonization gas claimed in claim 1, is characterized in that: the gas in step 3 refers to that through supercooling gas carries out cooling through gas-gas heat exchanger, lithium bromide water cooler or ammonia cooler again.
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| CN201210338104.4A CN103673504B (en) | 2012-09-13 | 2012-09-13 | A kind of method that pressure swing adsorption decarbonization gas reclaims entirely |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457138A (en) * | 2014-10-23 | 2015-03-25 | 江西恒兴源化工有限公司 | Method for recovering carbon sulfide and hydrogen in separation mode |
| CN109595878A (en) * | 2018-12-10 | 2019-04-09 | 内蒙古博大实地化学有限公司 | A method of synthesis ammonia, urea co-production liquid CO 2 |
| CN111153769A (en) * | 2020-01-16 | 2020-05-15 | 上海国际化建工程咨询有限公司 | Method and device for producing methanol by using tail gas of ethylene glycol device |
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| CN1546205A (en) * | 2003-12-15 | 2004-11-17 | 成都天立化工科技有限公司 | Improved decarbonizing process by two-stage pressure-variable adsorption |
| CN101177267A (en) * | 2007-10-31 | 2008-05-14 | 武汉凯迪电力环保有限公司 | Method for preparing food-grade carbon-dioxide by using power station smoke gas and system thereof |
| CN101422691A (en) * | 2008-11-20 | 2009-05-06 | 武汉凯迪电力环保有限公司 | Multi-pollutant removing technique and device of fuel coal smoke |
| CN101555186A (en) * | 2009-05-27 | 2009-10-14 | 北京健坤伟华新能源科技有限公司 | Method for preparing methane by deeply purifying landfill gas |
| CN101654248A (en) * | 2009-09-21 | 2010-02-24 | 兖矿鲁南化肥厂 | Dehydrogenation method of carbon dioxide feed gas |
| UA96855C2 (en) * | 2010-05-14 | 2011-12-12 | Георгій Костянтинович Лавренченко | Method for supply of carbon dioxide to synthesis of carbamide and installation for its realization |
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2012
- 2012-09-13 CN CN201210338104.4A patent/CN103673504B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546205A (en) * | 2003-12-15 | 2004-11-17 | 成都天立化工科技有限公司 | Improved decarbonizing process by two-stage pressure-variable adsorption |
| CN101177267A (en) * | 2007-10-31 | 2008-05-14 | 武汉凯迪电力环保有限公司 | Method for preparing food-grade carbon-dioxide by using power station smoke gas and system thereof |
| CN101422691A (en) * | 2008-11-20 | 2009-05-06 | 武汉凯迪电力环保有限公司 | Multi-pollutant removing technique and device of fuel coal smoke |
| CN101555186A (en) * | 2009-05-27 | 2009-10-14 | 北京健坤伟华新能源科技有限公司 | Method for preparing methane by deeply purifying landfill gas |
| CN101654248A (en) * | 2009-09-21 | 2010-02-24 | 兖矿鲁南化肥厂 | Dehydrogenation method of carbon dioxide feed gas |
| UA96855C2 (en) * | 2010-05-14 | 2011-12-12 | Георгій Костянтинович Лавренченко | Method for supply of carbon dioxide to synthesis of carbamide and installation for its realization |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457138A (en) * | 2014-10-23 | 2015-03-25 | 江西恒兴源化工有限公司 | Method for recovering carbon sulfide and hydrogen in separation mode |
| CN109595878A (en) * | 2018-12-10 | 2019-04-09 | 内蒙古博大实地化学有限公司 | A method of synthesis ammonia, urea co-production liquid CO 2 |
| CN111153769A (en) * | 2020-01-16 | 2020-05-15 | 上海国际化建工程咨询有限公司 | Method and device for producing methanol by using tail gas of ethylene glycol device |
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| CN103673504B (en) | 2016-01-20 |
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