CN103691250B - The method for purifying and recovering of time anger in a kind of steam drive oil production - Google Patents

The method for purifying and recovering of time anger in a kind of steam drive oil production Download PDF

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CN103691250B
CN103691250B CN201310504760.1A CN201310504760A CN103691250B CN 103691250 B CN103691250 B CN 103691250B CN 201310504760 A CN201310504760 A CN 201310504760A CN 103691250 B CN103691250 B CN 103691250B
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gas
pressure
adsorption
tower
adsorption tower
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CN103691250A (en
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宋迎来
韩信
徐树林
齐文章
关大义
谢永佳
杨玲
王禹
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Panjin Dober Environmental Technology Inc
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PANJIN DAOBO'ER PETROLEUM NEW TECHNOLOGY DEVELOPMENT Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00Capture or disposal of greenhouse gases
    • Y02C20/20Capture or disposal of greenhouse gases of methane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/151Reduction of greenhouse gas [GHG] emissions, e.g. CO2

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Abstract

The present invention relates to tail gas disposal technique field, particularly secondary angry method for purifying and recovering in a kind of steam drive oil production.The method can by the H in secondary anger 2s, CO 2and CH 4effectively be separated, to CO 2and CH 4carry out purifying and reclaiming.The present invention adopts low pressure pressure-variable adsorption, purification, low-pressure liquefied technique purified steam drives time anger of recovering the oil, and reclaims natural gas, produces liquid CO 2.This technique is advanced, and technology maturation is reliable, and product purity is high, and production cost is low.

Description

The method for purifying and recovering of time anger in a kind of steam drive oil production
Technical field
The present invention relates to tail gas disposal technique field, particularly secondary angry method for purifying and recovering in a kind of steam drive oil production.
Background technology
Viscous crude field when adopting steam drive oil production, in oil well time anger hydrogen sulfide and carbon dioxide content more and more serious.The rising of hydrogen sulfide content and the concentrated outer row of secondary anger, cause oil well and wellsite working environment to worsen, cause certain injury, there is severe compromise to the health of employee and the periphery village common people; The rising of carbon dioxide content, causes time anger to utilize.Therefore control carries out to the secondary anger produced in steam drive oil production process very urgent.
Summary of the invention
The invention provides the method for purifying and recovering of time anger in a kind of steam drive oil production, the method can by the H in secondary anger 2s, CO 2and CH 4effectively be separated, to CO 2and CH 4carry out purifying and reclaiming.
For solving problems of the prior art, the present invention is achieved through the following technical solutions.
In steam drive oil production, a method for purifying and recovering for time anger, mainly comprises H in described anger 2s, CO 2and CH 4gas and other impurity, described method mainly comprises the following steps:
1) secondary air drying desulfurized step
In steam drive oil production, time anger removes liquid through gas-liquid separator, then after air cooler cooling, the desulfurizing agent that sulfur-bearing time anger enters in desulfurizing tower and tower reflects, removes the H in time anger 2s.
The weight ratio of described desulfurizing agent consists of: FeOOH 85-90%, zinc oxide 8-12%, auxiliary agent 2-3%.
2) secondary angry supercharging pre-treatment step
Time anger after desulfurization enters into unstripped gas surge tank as unstripped gas, after compressor boost to 0.3MPa, unstrpped gas enters pretreatment adsorption tower at the bottom of the pretreatment adsorption tower of pretreatment system, under the selective absorption of active carbon class adsorbent, and the most of C in removing unstripped gas 5 +heavy hydrocarbons impurity.
3) unstripped gas pressure-variable adsorption CH 4/ CO 2separating step
Unstripped gas through previous step enters pressure swing adsorption decarbonization system, the CO in adsorption tower Raw gas 2got off by silica type adsorbent adsorption selection, separation of C O 2purified gas to deoil field fuel gas system as gas product.
When the mass-transfer zone forward position (be called absorption forward position) of adsorbing contaminant in adsorption tower arrives a certain position of the reserved section of bed outlet, stop absorption, proceed to regenerative process.
The regenerative process of adsorbent is as follows successively:
A. drop pressure process
This is after adsorption process terminates, and along absorption direction, the gas of the elevated pressures in tower is put into the process that other has completed the lower pressure adsorption tower of regeneration, and this process is not only pressure reduction CH in recovery tower especially 4, improve CH 4the process of yield, this flow process includes three continuous print drop pressure processes altogether.
B. inverse put process
All press end, absorption forward position reached bed outlet after, against absorption direction adsorption column pressure is down to close to normal pressure, now by the CO adsorbed 2start to desorb in a large number from adsorbent, and enter CO 2storage tank.
C. vacuum process
After inverse put terminates, for making adsorbent be regenerated thoroughly, with vavuum pump, bed being vacuumized, reducing the dividing potential drop of adsorbate component further, and adsorbate is desorbed, and entering CO 2storage tank.
D. boost pressure process
After vacuum process completes, successively this adsorption tower is boosted with the elevated pressures gas from other adsorption tower, this process is corresponding with drop pressure process, be not only boost process, and be the process of the bed dead space gas reclaiming other tower, this flow process includes continuous three boost pressure processes altogether.
F. gas product boost process
After three boost pressure processes complete, can switch to reposefully to make adsorption tower and adsorb next time and ensure that product purity does not fluctuate in this course, need slowly and reposefully to use rich CH by boost adjusted valve 4gas rises to adsorptive pressure to adsorption column pressure.
After this process, adsorption tower just completes complete " adsorption-regeneration " circulation, again for absorption is next time got ready.
Multiple adsorption tower hockets above absorption, regenerative operation, has 1 adsorption tower to be in adsorbed state all the time, can realize being continuously separated and purification of secondary gas.
4) organic sulfur removal step
Activated carbon desulphurization agent is utilized to remove separation of C H 4after CO 2organic sulfur in gas.
5) liquid CO 2preparation process
CO after organic sulfide removal 2gas is pressurized to after 2.8MPa through overcompression and carries out de-hydrocarbon purification, then makes it liquefaction for liquid CO by cooling 2, drying dehydration, rectified purified after obtain industrial liquid CO 2product.
The present invention adopts low pressure pressure-variable adsorption, purification, low-pressure liquefied technique purified steam drives time anger of recovering the oil, and reclaims natural gas, produces liquid CO 2.This technique is advanced, and technology maturation is reliable, and product purity is high, and production cost is low.
Accompanying drawing explanation
Fig. 1 double tower dry desulfurizing process flow chart
Fig. 2 angry CO 2reclaiming clean process chart
Detailed description of the invention
Align 40 pieces angry employing recovery and purification methods of the present invention.The feature of neat 40 pieces anger is dispersions, and in each small station tolerance, secondary anger, hydrogen sulfide content difference is comparatively large, simultaneously CO in time anger 2content is up to 80%-90%.
Process mainly comprises the following steps:
1) secondary air drying desulfurized step
In steam drive oil production, time anger removes liquid through gas-liquid separator, then after air cooler cooling, the desulfurizing agent that sulfur-bearing time anger enters in desulfurizing tower and tower reflects, removes the H in time anger 2s.
The weight ratio of described desulfurizing agent consists of: FeOOH 85-90%, zinc oxide 8-12%, auxiliary agent 2-3%.
In order to make full use of desulfurizing agent, to ensure in each tower that desulfurizing agent can reach capacity Sulfur capacity, the desulfurization flow process adopting connection in series-parallel to combine, takes into full account technique in design, makes each tower can as first and last tower.Establish two beds in each desulfurizing tower, be convenient to the handling of desulfurizing agent.On average the cycle of changing dressings is half a year to desulfurizing agent.Hydrogen sulfide content≤10mg/m in natural gas after de- 3.
2) secondary angry supercharging pre-treatment step
Time anger after desulfurization enters into unstripped gas surge tank as unstripped gas, after compressor boost to 0.3MPa, unstrpped gas enters pretreatment adsorption tower at the bottom of the pretreatment adsorption tower of pretreatment system, under the selective absorption of active carbon class adsorbent, and the most of C in removing unstripped gas 5 +heavy hydrocarbons impurity.
3) unstripped gas pressure-variable adsorption CH 4/ CO 2separating step
Unstripped gas after oil removing enters pressure swing adsorption decarbonization system, the CO in adsorption tower Raw gas 2got off by silica type adsorbent adsorption selection, separation of C O 2purified gas to deoil field fuel gas system as gas product.
When the mass-transfer zone forward position (be called absorption forward position) of adsorbing contaminant in adsorption tower arrives a certain position of the reserved section of bed outlet, stop absorption, proceed to regenerative process.
The regenerative process of adsorbent is as follows successively:
A. drop pressure process
This is after adsorption process terminates, and along absorption direction, the gas of the elevated pressures in tower is put into the process that other has completed the lower pressure adsorption tower of regeneration, and this process is not only pressure reduction CH in recovery tower especially 4, improve CH 4the process of yield, this flow process includes three continuous print drop pressure processes altogether.
B. inverse put process
All press end, absorption forward position reached bed outlet after, against absorption direction adsorption column pressure is down to close to normal pressure, now by the CO adsorbed 2start to desorb in a large number from adsorbent, and enter CO 2storage tank.
C. vacuum process
After inverse put terminates, for making adsorbent be regenerated thoroughly, with vavuum pump, bed being vacuumized, reducing the dividing potential drop of adsorbate component further, and adsorbate is desorbed, and entering CO 2storage tank.
D. boost pressure process
After vacuum process completes, successively this adsorption tower is boosted with the elevated pressures gas from other adsorption tower, this process is corresponding with drop pressure process, be not only boost process, and be the process of the bed dead space gas reclaiming other tower, this flow process includes continuous three boost pressure processes altogether.
F. gas product boost process
After three boost pressure processes complete, can switch to reposefully to make adsorption tower and adsorb next time and ensure that product purity does not fluctuate in this course, need slowly and reposefully to rise to adsorptive pressure with rich CH4 gas to adsorption column pressure by boost adjusted valve.
After this process, adsorption tower just completes complete " adsorption-regeneration " circulation, again for absorption is next time got ready.
Multiple adsorption tower hockets above absorption, regenerative operation, has 1 adsorption tower to be in adsorbed state all the time, can realize being continuously separated and purification of secondary gas.
4) organic sulfur removal step
Activated carbon desulphurization agent is utilized to remove separation of C H 4after CO 2organic sulfur in gas.
The content (ppm) of table 1 organic sulfur
5) liquid CO 2preparation process
CO after organic sulfide removal 2gas is pressurized to after 2.8MPa through overcompression and carries out de-hydrocarbon purification, then makes it liquefaction for liquid CO by cooling 2, drying dehydration, rectified purified after obtain industrial liquid CO 2product.
With neat 40 pieces of oil fields time anger for unstripped gas, produce the purified gas and the liquid CO 2 that are rich in methane.Neat 40 pieces of oil fields time anger is all utilized, reclaims natural gas, reduce energy waste; Gas purification organic sulfide removal, reduces the pollution of pernicious gas to environment and the harm to human body; Liquid CO 2 is produced, and reduces greenhouse gas emission.This project not only meets the requirement of national recycling economy, cleaner production, and is environmental protection project.

Claims (3)

1. a secondary angry method for purifying and recovering in steam drive oil production, mainly comprises H in described anger 2s, CO 2and CH 4gas and other impurity, is characterized in that, described method mainly comprises the following steps:
1) secondary air drying desulfurized step
In steam drive oil production, time anger removes liquid through gas-liquid separator, then after air cooler cooling, the desulfurizing agent that sulfur-bearing time anger enters in desulfurizing tower and tower reacts, and removes the H in time anger 2s;
2) secondary angry supercharging pre-treatment step
Time anger after desulfurization enters into unstripped gas surge tank as unstripped gas, after compressor boost to 0.3MPa, unstrpped gas enters pretreatment adsorption tower at the bottom of the pretreatment adsorption tower of pretreatment system, under the selective absorption of active carbon class adsorbent, and the most of C in removing unstripped gas 5 +heavy hydrocarbons impurity;
3) unstripped gas pressure-variable adsorption CH 4/ CO 2separating step
Unstripped gas through previous step enters pressure swing adsorption decarbonization system, the CO in adsorption tower Raw gas 2got off by silica type adsorbent adsorption selection, separation of C O 2purified gas is as natural gas CH 4product deoils field fuel gas system;
4) organic sulfur removal step
Activated carbon desulphurization agent is utilized to remove separation of C H 4after CO 2organic sulfur in gas;
5) liquid CO 2preparation process
CO after organic sulfide removal 2gas is pressurized to after 2.8MPa through overcompression and carries out de-hydrocarbon purification, then makes it liquefaction for liquid CO by cooling 2, drying dehydration, rectified purified after obtain industrial liquid CO 2product.
2. method for purifying and recovering as claimed in claim 1, is characterized in that, at unstripped gas pressure-variable adsorption CH 4/ CO 2in separating step, when the mass-transfer zone forward position of adsorbing contaminant in adsorption tower arrives a certain position of the reserved section of bed outlet, stop absorption, proceed to regenerative process,
The regenerative process of adsorbent is as follows successively:
A. drop pressure process
This is after adsorption process terminates, and along absorption direction, the gas of the elevated pressures in tower is put into the process that other has completed the lower pressure adsorption tower of regeneration, and this process is not only pressure reduction CH in recovery tower especially 4, improve CH 4the process of yield, this flow process includes three continuous print drop pressure processes altogether;
B. inverse put process
All press end, absorption forward position reached bed outlet after, against absorption direction adsorption column pressure is down to close to normal pressure, now by the CO adsorbed 2start to desorb in a large number from adsorbent, and enter CO 2storage tank;
C. vacuum process
After inverse put terminates, for making adsorbent be regenerated thoroughly, with vavuum pump, bed being vacuumized, reducing the dividing potential drop of adsorbate component further, and adsorbate is desorbed, and entering CO 2storage tank;
D. boost pressure process
After vacuum process completes, successively this adsorption tower is boosted with the elevated pressures gas from other adsorption tower, this process is corresponding with drop pressure process, be not only boost process, and be the process of the bed dead space gas reclaiming other tower, this flow process includes continuous three boost pressure processes altogether;
F. gas product boost process
After three boost pressure processes complete, can switch to reposefully to make adsorption tower and adsorb next time and ensure that product purity does not fluctuate in this course, need slowly and reposefully to use rich CH by boost adjusted valve 4gas rises to adsorptive pressure to adsorption column pressure;
After this process, adsorption tower just completes complete " adsorption-regeneration " circulation, again for absorption is next time got ready, multiple adsorption tower hockets above absorption, regenerative operation, all the time there is 1 adsorption tower to be in adsorbed state, being continuously separated and purification of secondary gas can be realized.
3. method for purifying and recovering as claimed in claim 1, is characterized in that, step 1) in the weight ratio of desulfurizer therefor consist of: FeOOH 85-90%, zinc oxide 8-12%, auxiliary agent 2-3%.
CN201310504760.1A 2013-10-19 2013-10-19 The method for purifying and recovering of time anger in a kind of steam drive oil production Active CN103691250B (en)

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CN104748506B (en) * 2015-03-13 2017-05-24 河南心连心深冷能源股份有限公司 Device for recycling CO2 from oil field mining assisting tail gas and process thereof
CN111004657B (en) * 2019-12-11 2021-04-27 中国天辰工程有限公司 Method for comprehensively utilizing oilfield associated gas

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CN102580458A (en) * 2012-02-21 2012-07-18 北京信诺海博石化科技发展有限公司 Multi-order vacuumizing pressure swing adsorption process

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102580458A (en) * 2012-02-21 2012-07-18 北京信诺海博石化科技发展有限公司 Multi-order vacuumizing pressure swing adsorption process

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Inventor after: Song Yinglai

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Address after: 124010 Industrial Development Zone, Xinglongtai District, Liaoning, Panjin

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