WO2023066134A1 - 一种从化学法回收co2的废气中制取氮气的系统及方法 - Google Patents

一种从化学法回收co2的废气中制取氮气的系统及方法 Download PDF

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Publication number
WO2023066134A1
WO2023066134A1 PCT/CN2022/125136 CN2022125136W WO2023066134A1 WO 2023066134 A1 WO2023066134 A1 WO 2023066134A1 CN 2022125136 W CN2022125136 W CN 2022125136W WO 2023066134 A1 WO2023066134 A1 WO 2023066134A1
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nitrogen
gas
air inlet
filter
waste gas
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PCT/CN2022/125136
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English (en)
French (fr)
Chinese (zh)
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李玉雪
戚励
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碳和科技(北京)有限公司
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Priority to JP2023568544A priority Critical patent/JP2024517292A/ja
Publication of WO2023066134A1 publication Critical patent/WO2023066134A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/04—Purification or separation of nitrogen
    • C01B21/0405—Purification or separation processes
    • C01B21/0433—Physical processing only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/04—Purification or separation of nitrogen
    • C01B21/0405—Purification or separation processes
    • C01B21/0433—Physical processing only
    • C01B21/045—Physical processing only by adsorption in solids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0001—Separation or purification processing
    • C01B2210/0009—Physical processing
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0001—Separation or purification processing
    • C01B2210/0009—Physical processing
    • C01B2210/0014—Physical processing by adsorption in solids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0045—Oxygen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0051—Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0062—Water
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00—Purification or separation of specific gases
    • C01B2210/0043—Impurity removed
    • C01B2210/0068—Organic compounds
    • 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

Definitions

  • the invention belongs to the technical field of recovery and utilization of nitrogen, and in particular relates to a system and method for producing nitrogen from waste gas recovered by chemical methods.
  • the nitrogen used in the factory is obtained through air separation nitrogen production, and there are two methods: cryogenic and PSA pressure swing adsorption. No matter which method is used, the raw material gas used is air, and the nitrogen content is 78%.
  • the capture and recycling of carbon dioxide in flue gas is an important measure to achieve the goal of "double carbon".
  • the object of the present invention is to provide a kind of system that produces nitrogen from the exhaust gas of chemical recovery CO2 , to solve the above-mentioned technical problem.
  • This system can process the waste gas after chemical recovery of CO2 to produce nitrogen. It can not only recover high-content nitrogen in the vented air (exhaust gas after chemical recovery of CO2 ), but also recover the pressure of the vented air, which has an energy-saving effect obvious.
  • the invention also provides a method for producing nitrogen from waste gas of CO2 recovered by chemical method.
  • the system for producing nitrogen from the waste gas of chemical recovery of CO of the present invention adopts the following technical scheme: a system for producing nitrogen from the waste gas of chemical recovery of CO , said system comprising a rough treatment device and a deep purification device and a nitrogen enrichment device; the rough treatment device is used to initially remove solvent impurities in the exhaust gas to obtain a preliminary clean gas; the deep purification device includes a compressor, a deep water removal device and a second filter connected in sequence, and the compression The air inlet of the machine is connected with the gas outlet of the rough treatment device, and the deep purification device is used to carry out deep purification to the preliminary clean gas to obtain deep purification gas; the nitrogen concentration device includes an adsorption tower, and the adsorption tower The gas inlet is connected with the gas outlet of the second filter, and the adsorption tower is used for performing pressure swing adsorption on the deeply purified gas to produce nitrogen.
  • the deep water removal device includes a water separation tank and a dryer, the air inlet of the water separation tank is connected to the air outlet of the compressor, and the air outlet of the water separation tank is connected to the air outlet of the dryer The air inlet is connected, and the air outlet of the dryer is connected with the air inlet of the second filter.
  • the rough treatment device includes a mist eliminator, a cooler, a gas-liquid separator and a first filter
  • the gas outlet of the mist eliminator is connected with the air inlet of the cooler
  • the air outlet of the cooler is The air outlet is connected to the air inlet of the gas-liquid separator
  • the air outlet of the gas-liquid separator is connected to the air inlet of the first filter
  • the air outlet of the first filter is connected to the compressor connected to the air inlet of the machine.
  • the cooler lowers the temperature of the gas to 30-35° C.
  • the first filter is used to remove any one or a combination of sulfide, nitrogen oxide, water and dust.
  • At least two adsorption towers are provided to form an adsorption tower group.
  • a PLC-controlled pneumatic valve is provided on the pipeline connecting the adsorption tower group to the gas outlet of the second filter.
  • adsorption towers there are two adsorption towers, and the two adsorption towers are arranged in parallel.
  • the gas outlet at the top of the adsorption tower is connected to the finished nitrogen storage tank through a nitrogen gas outlet pipe, and a PLC is provided on the nitrogen gas outlet pipe. Control pneumatic valves.
  • the method for producing nitrogen from the waste gas of chemical recovery of CO of the present invention adopts the following technical scheme: a method for producing nitrogen from the waste gas of chemical recovery of CO 2 adopts the above-mentioned system to produce nitrogen.
  • the waste gas after recovering CO by the chemical method contains nitrogen, oxygen, carbon dioxide, water and organic amines, the volume percentage of the nitrogen is more than 90%, and the volume percentage of the oxygen is 8-12%, so The volume percentage of the carbon dioxide is 0.5-2%, and the volume percentage of the water is 5-9%.
  • the pressure of the deeply purified gas is 0.7-1.0 MPa
  • the dust content is ⁇ 0.01 ⁇ m
  • the pressure dew point is -20-30°C.
  • the system for producing nitrogen from the waste gas of CO recovered by chemical method of the present invention can process the waste gas after CO recovered by chemical method to produce nitrogen, and not only can reclaim the air (recovered CO by chemical method )
  • the high content of nitrogen in the exhaust gas can also recover the pressure of the released air, and the energy saving effect is obvious.
  • the system of the present invention for producing nitrogen from the waste gas of recovering CO2 by chemical method has a high degree of automation of the overall equipment, good energy-saving effect, can be vigorously promoted in industry, and is one of the measures for realizing carbon emission reduction.
  • Fig. 1 is the structural representation of the system for producing nitrogen from the waste gas of chemical method recovery CO of the embodiment of the present invention
  • 100-coarse treatment device 200-deep purification device; 300-nitrogen concentration device;
  • 110-demister 120-cooler; 130-gas-liquid separator; 140-first filter;
  • the present invention provides a method for recovering CO2 from chemical methods A system for producing nitrogen from waste gas.
  • the system of producing nitrogen from the waste gas of chemical recovery CO of the present invention comprises: rough treatment device 100, depth purification device 200 and nitrogen concentrator 300; solvent impurity to obtain preliminary clean gas;
  • the deep purification device 200 includes a compressor 210, a deep water removal device and a second filter 240 connected in sequence, and the air inlet of the compressor 210 is connected with the gas outlet of the rough treatment device 100, and the depth Purification device 200 is used to carry out deep purification to preliminary clean gas to obtain deep purification gas;
  • Nitrogen enrichment device 300 comprises adsorption tower 310, and the gas inlet of adsorption tower 310 is connected with the gas outlet of second filter 240, and adsorption tower 310 is used for Pressure swing adsorption is performed on deeply purified gas to produce nitrogen.
  • the system for producing nitrogen from the exhaust gas of CO recovered by chemical method of the present invention can process the exhaust gas recovered by chemical CO to produce nitrogen, and not only can be recycled into the air (exhaust gas recovered by chemical CO 2 )
  • the high content of nitrogen can also recover the pressure of the released air, and the energy saving effect is obvious.
  • the depth water removal device includes a water separation tank 220 and a dryer 230, the air inlet of the water separation tank 220 is connected to the air outlet of the compressor 210, and the air outlet of the water separation tank 220 is connected to the air outlet of the dryer 230.
  • the air inlet is connected, and the air outlet of the dryer 230 is connected with the air inlet of the second filter 240 .
  • the compressor 210 is used to boost the pressure of the preliminary clean gas, and then the water is divided by the water separation tank 220, and then enters the dryer 230 for secondary drying and purification.
  • the water in the preliminary clean gas can be deeply removed, and the trace amount of sulfide carried by the front end can also be removed.
  • the gas enters the second filter 240 to further remove trace sulfides, nitrogen oxides, water and dust to obtain deeply purified gas (for example, the deeply purified gas can reach the following levels: pressure 0.7-1.0MPa, dust content ⁇ 0.01 ⁇ m, dew point -20 ⁇ -30°C).
  • the rough treatment device 100 includes a mist eliminator 110, a cooler 120, a gas-liquid separator 130 and a first filter 140, the gas outlet of the mist eliminator 110 is connected to the air inlet of the cooler 120,
  • the gas outlet of the cooler 120 is connected with the gas inlet of the gas-liquid separator 130
  • the gas outlet of the gas-liquid separator 130 is connected with the gas inlet of the first filter 140
  • the gas outlet of the first filter 140 is connected with the compressor 210 connected to the air inlet.
  • the solvent vapor carried by the waste gas after the chemical recovery of CO2 can be preliminarily demisted and intercepted, and then enter the cooler 120 to cool down, and the water vapor carried in the waste gas can be roughly dehydrated.
  • the cooler 120 reduces the temperature of the gas to 30-35°C, and the first filter 140 is used to remove any one or a combination of sulfides, nitrogen oxides, water and dust.
  • At least two adsorption towers 310 are provided to form an adsorption tower group.
  • the pipeline connecting the adsorption tower group with the gas outlet of the second filter 230 is provided with a PLC-controlled pneumatic valve.
  • the deeply purified gas enters different adsorption towers 310 for adsorption and separation through the pneumatic valve controlled by PLC.
  • the finished nitrogen gas is collected from the top of the tower and enters the finished nitrogen gas storage tank for downstream use.
  • adsorption towers 310 there are two adsorption towers 310, and the two adsorption towers 310 are arranged in parallel.
  • the gas outlet at the top of the adsorption tower 310 is connected to the finished nitrogen storage tank through a nitrogen gas outlet pipe, and the nitrogen gas outlet pipe is provided with PLC control. pneumatic valve.
  • the present invention also provides a method for producing nitrogen from the waste gas after recovering CO2 by chemical method, and adopts the above-mentioned system to produce nitrogen.
  • chemical method recovers CO Contain nitrogen, oxygen, carbon dioxide, water and organic amine in the waste gas after CO , the content of nitrogen is more than 90% (volume percent), and the content of oxygen is 8 ⁇ 12 % (volume percentage), the content of carbon dioxide is 0.5-2% (volume percentage), and the content of water is 5-9% (volume percentage).
  • the pressure of the deeply purified gas is 0.7-1.0 MPa
  • the dust content is ⁇ 0.01 ⁇ m
  • the pressure dew point is -20--30°C.
  • the method for producing nitrogen from the waste gas after chemical recovery of CO can be:
  • the air discharge in the present embodiment is about 47 °C, 10KPa, nitrogen 92% (volume percentage), oxygen 10% (volume percent), carbon dioxide 1% (volume percent), water 7% (volume percent) and a trace of organic amine.
  • the preliminary clean gas enters the compressor 210 and is compressed to 0.8MPa. After further water removal by the water separator tank 220, it enters the dryer 230 for deep dehydration and drying; after that, it enters the second filter 240 for dust removal to ensure the dust content in the air. ⁇ 0.01 ⁇ m, pressure dew point -20 °C, can reach the adsorption level (i.e. get deeply purified gas).
  • the deeply purified gas enters the nitrogen concentrator 300 (adsorption tower group), and after pressure swing adsorption, 0.6 MPa, 20000 Nm 3 /h, and 99.5% purity of finished nitrogen are produced at the top of the tower.
  • the gas production of the present invention is increased by 29%, and the energy-saving effect is obvious.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Treating Waste Gases (AREA)
  • Carbon And Carbon Compounds (AREA)
PCT/CN2022/125136 2021-10-19 2022-10-13 一种从化学法回收co2的废气中制取氮气的系统及方法 WO2023066134A1 (zh)

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CN113998677B (zh) * 2021-10-19 2023-10-24 碳和科技(北京)有限公司 一种从化学法回收co2的废气中制取氮气的系统及方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101417200A (zh) * 2007-10-22 2009-04-29 辽河石油勘探局 锅炉烟道气回收二氧化碳、氮气的方法
CN105413429A (zh) * 2015-12-04 2016-03-23 中国天辰工程有限公司 一种石灰窑尾气分离提纯的方法
CN105864798A (zh) * 2016-04-10 2016-08-17 海诺尔环保产业股份有限公司 一种垃圾焚烧尾气二氧化碳及氮气分离回收工艺
CN107899376A (zh) * 2017-11-27 2018-04-13 北京集封环能科技有限责任公司 烟气中二氧化碳和氮气的联合捕集回收装置及方法
CN109289440A (zh) * 2018-04-24 2019-02-01 陕西龙门煤化工有限责任公司 一种从焦炉烟道气中分离提纯n2和co2的装置和方法
CN110498416A (zh) * 2019-08-14 2019-11-26 东营市港城热力有限公司 一种燃煤电厂锅炉烟气同步回收二氧化碳及氮气的系统
CN113975950A (zh) * 2021-11-04 2022-01-28 大连理工大学 一种化学法和psa法同步回收烟道气中二氧化碳和氮气的系统及方法
CN113998677A (zh) * 2021-10-19 2022-02-01 碳和科技(北京)有限公司 一种从化学法回收co2的废气中制取氮气的系统及方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63151602A (ja) * 1986-12-16 1988-06-24 Kawasaki Steel Corp 高純度窒素ガス精製法
JP4359513B2 (ja) * 2004-01-23 2009-11-04 住友金属鉱山株式会社 １５ｎの製造方法及びそれを利用した硫酸或いは硫酸カルシウムの製造方法
KR100937769B1 (ko) * 2009-04-30 2010-01-20 (주)이에이앤지 초고순도 질소 공급장치
CN106500460B (zh) * 2016-11-24 2018-10-19 中国矿业大学 天然气液化过程中氮气脱除并提纯装置及方法
CN207356849U (zh) * 2017-10-17 2018-05-15 冠礼控制科技（上海）有限公司 一种nmp废气回收系统
CN108261844B (zh) * 2017-12-07 2020-03-31 江苏宇通干燥工程有限公司 一种氮气闭路vc专用干燥装置及其工作方法
CN109045925A (zh) * 2018-08-17 2018-12-21 青岛大拇指环境工程有限公司 一种VOCs废气回收处理装置和方法
WO2020218653A1 (ko) * 2019-04-26 2020-10-29 (주)에어레인 연소배가스를 이용한 질소농축공기의 제조방법
CN113310063A (zh) * 2021-02-10 2021-08-27 上海凯盛节能工程技术有限公司 一种玻璃窑烟气二氧化碳的捕集提纯装置及捕集提纯方法
CN216336618U (zh) * 2021-10-19 2022-04-19 碳和科技(北京)有限公司 一种从化学法回收co2的废气中制取氮气的系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101417200A (zh) * 2007-10-22 2009-04-29 辽河石油勘探局 锅炉烟道气回收二氧化碳、氮气的方法
CN105413429A (zh) * 2015-12-04 2016-03-23 中国天辰工程有限公司 一种石灰窑尾气分离提纯的方法
CN105864798A (zh) * 2016-04-10 2016-08-17 海诺尔环保产业股份有限公司 一种垃圾焚烧尾气二氧化碳及氮气分离回收工艺
CN107899376A (zh) * 2017-11-27 2018-04-13 北京集封环能科技有限责任公司 烟气中二氧化碳和氮气的联合捕集回收装置及方法
CN109289440A (zh) * 2018-04-24 2019-02-01 陕西龙门煤化工有限责任公司 一种从焦炉烟道气中分离提纯n2和co2的装置和方法
CN110498416A (zh) * 2019-08-14 2019-11-26 东营市港城热力有限公司 一种燃煤电厂锅炉烟气同步回收二氧化碳及氮气的系统
CN113998677A (zh) * 2021-10-19 2022-02-01 碳和科技(北京)有限公司 一种从化学法回收co2的废气中制取氮气的系统及方法
CN113975950A (zh) * 2021-11-04 2022-01-28 大连理工大学 一种化学法和psa法同步回收烟道气中二氧化碳和氮气的系统及方法

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