CN103673504B - A kind of method that pressure swing adsorption decarbonization gas reclaims entirely - Google Patents

A kind of method that pressure swing adsorption decarbonization gas reclaims entirely Download PDF

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Publication number
CN103673504B
CN103673504B CN201210338104.4A CN201210338104A CN103673504B CN 103673504 B CN103673504 B CN 103673504B CN 201210338104 A CN201210338104 A CN 201210338104A CN 103673504 B CN103673504 B CN 103673504B
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China
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gas
compressor
pressure
adsorption decarbonization
separator
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CN201210338104.4A
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Chinese (zh)
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CN103673504A (en
Inventor
李万清
杨泽荣
魏天荣
金艳锋
程双
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湖北三宁化工股份有限公司
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Abstract

The method that pressure swing adsorption decarbonization gas reclaims entirely is based on vacuumizing, purging two kinds of flow processs in pressure-changeable adsorption decarbonization device, by CO in two kinds of flow processs 2gas and drop a hint and all send to carbon-dioxide gas compressor and compress, after removing hydrogen sulfide, cool through gas-gas heat exchanger, lithium bromide water cooler or ammonia cooler again, cooled gas enters gas-liquid separator, and the incoagulable gas flashed off from separator top goes feed gas compressor three sections of imports; From the liquid CO that separator bottom separates 2return gas-gas heat exchanger, after heat exchange, obtain CO 2gas removes urea plant after returning carbon-dioxide gas compressor or heater via heating.For CO more than needed 2gas, directly removes CO after gas-liquid separator 2product is filling, obtains CO 2finished product.Adopt method of the present invention all can reclaim vacuumizing, purging dropping a hint of two kinds of flow processs, there is the advantage of saving available gas and reducing atmosphere pollution.

Description

A kind of method that pressure swing adsorption decarbonization gas reclaims entirely

Technical field

The invention belongs to gas recovery techniques, be specifically related to a kind of method that pressure swing adsorption decarbonization gas reclaims entirely.

Background technology

At present, synthetic ammonia/urea plant conversion gas decarburization is an important procedure of synthetic ammonia, the purification of methanol feedstock gas, 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 rectifying section suitable venting emptying of (1) sweeping process, and inverse put one, two sections recovery (for the whole emptying without urea plant such as synthetic ammonia or methyl alcohol), reclaims rear emptying before purging one, two; Clean-up stage is along putting purging, inverse put emptying; One section that purges is gone gas product to reclaim (for synthetic ammonia installation emptying) along emptying 0.08Mpa to 0.07MPa, inverse put 0.07 to 0.03MPa, purges 0.03 to 0.02MPa emptying; Purge two sections and remove one section of purging, inverse put 0.124MPa to 0.025MPa emptying along putting after 0.35MPa to 0.125MPa removes surge tank.(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, inverse put emptying 0.028MPa to 0.002MPa, vacuumize 0.002MPa to-0.066MPa.

Under normal circumstances, the CO that pressure-swing absorption apparatus removes is entered 2a part enters CO 2compressor is used for urea or methanol-fueled CLC, and the direct emptying of another part, not only wastes resource but also pollute air.

Summary of the invention

The object of the invention is a kind of method in order to provide pressure swing adsorption decarbonization gas entirely to reclaim, the method can realize whole recovery of dropping a hint to pressure-swing absorption apparatus, not only saves available gas but also reduce the pollution to air.

The object of the present invention is achieved like this: a kind of method that pressure swing adsorption decarbonization gas reclaims entirely, 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 process: the carbon dioxide through overcompression is removed hydrogen sulfide;

3) refrigerated separation: remove the gas after hydrogen sulfide again through supercooling laggard enter gas-liquid separator, flash off from separator top containing H 2, N 2, CO, CH 4feed gas compressor three sections of imports are gone Deng incoagulable gas; From the liquid CO that separator bottom separates 2return gas-gas heat exchanger, after heat exchange, obtain CO 2gas removes urea plant after returning carbon-dioxide gas compressor or direct heater via heating; 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, in sweeping process along venting, sweep gas and inverse put gas.

Described go out CO 2the gas temperature of compressor is 125 DEG C, and pressure is 2 ~ 14.1MPa.

Through supercooling, gas in step 3) refers to that gas cools through gas-gas heat exchanger, lithium bromide water cooler or ammonia cooler again.

The method that pressure swing adsorption decarbonization gas provided by the invention reclaims entirely, its advantage is:

1, reclaim the available gas accounting for conversion gas total amount 2% and again arrive synthesis ammonia system, increase the output of synthetic ammonia.

2, CO more than needed 2sell as doing finished product, 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 present invention process flow chart.

Detailed description of the invention

Embodiment 1

To vacuumize, purge CO in two kinds of flow processs in pressure-changeable adsorption decarbonization device 2gas all sends to carbon-dioxide gas compressor compression with dropping a hint, the gas temperature gone out after three sections or four sections, compressor is 125 DEG C, pressure is 2-14.1MPa, deviate from the gas after hydrogen sulfide, again through gas-gas heat exchanger, ammonia cooler cooling, cooled gas enters gas-liquid separator, and what flash off from separator top contains H 2, N 2, CO, CH 4feed gas compressor three sections of imports are gone Deng incoagulable gas; The liquid CO that separator bottom separates 2return 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 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, the gas temperature gone out after five sections, compressor is 125 DEG C, pressure is 2 ~ 14.1MPa, deviate from the gas after hydrogen sulfide, again through gas-gas heat exchanger, the cooling of lithium bromide water cooler, cooled gas enters gas-liquid separator, and what flash off from separator top contains H 2, N 2, CO, CH 4feed gas compressor three sections of imports are gone Deng incoagulable gas; The liquid CO that separator bottom separates 2return gas-gas heat exchanger, the CO after heat exchange 2gas heater via heats, and the gas temperature after heating, between 100 DEG C-110 DEG C, 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, in sweeping process along venting, sweep gas and inverse put gas.

Claims (3)

1. the method that entirely reclaims of pressure swing adsorption decarbonization gas, 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 process: the carbon dioxide through overcompression is removed hydrogen sulfide;
3) refrigerated separation: remove the gas after hydrogen sulfide again through supercooling laggard enter gas-liquid separator, flash off from separator top containing H 2, N 2, CO, CH 4feed gas compressor three sections of imports are gone Deng incoagulable gas; From the liquid CO that separator bottom separates 2return gas-gas heat exchanger, after heat exchange, obtain CO 2gas removes urea plant after returning carbon-dioxide gas compressor or direct heater via heating; 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, in sweeping process along venting, sweep gas and inverse put gas.
2. the method that entirely reclaims 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 DEG C, and pressure is 2 ~ 14.1MPa.
3. the method that entirely reclaims of pressure swing adsorption decarbonization gas according to claim 1, is characterized in that: through supercooling, the gas in step 3 refers to that gas cools through gas-gas heat exchanger, lithium bromide water cooler or ammonia cooler again.
CN201210338104.4A 2012-09-13 2012-09-13 A kind of method that pressure swing adsorption decarbonization gas reclaims entirely CN103673504B (en)

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CN103673504B true CN103673504B (en) 2016-01-20

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
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

Citations (6)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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

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