CN114713008A - Tail gas treatment device suitable for domestic waste schizolysis produces - Google Patents

Tail gas treatment device suitable for domestic waste schizolysis produces Download PDF

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Publication number
CN114713008A
CN114713008A CN202210228496.2A CN202210228496A CN114713008A CN 114713008 A CN114713008 A CN 114713008A CN 202210228496 A CN202210228496 A CN 202210228496A CN 114713008 A CN114713008 A CN 114713008A
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China
Prior art keywords
tower
carbon dioxide
pump
lean
regeneration
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Pending
Application number
CN202210228496.2A
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Chinese (zh)
Inventor
师圆生
杨林鲜
曾福厚
余月勇
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Shandong Baolan Ep Co ltd
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Shandong Baolan Ep Co ltd
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Priority to CN202210228496.2A priority Critical patent/CN114713008A/en
Publication of CN114713008A publication Critical patent/CN114713008A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/62Carbon oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/80Organic bases or salts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/50Carbon oxides
    • B01D2257/504Carbon dioxide
    • 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
    • Y02C20/40Capture or disposal of greenhouse gases of CO2

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The tail gas treatment device suitable for cracking the household garbage comprises an electric tar precipitator, a carbon monoxide catalytic bed, a spray tower, a spray pump, a carbon dioxide absorption tower, a rich liquid pump, a lean and rich liquid heat exchanger, a lean liquid cooler, a regeneration tower, a reboiler, a lean liquid pump, a regenerated gas cooler, a regenerated gas separator and a reflux pump, the spray pump is connected with the spray tower to form internal circulation, the regeneration tower is connected with the carbon dioxide absorption tower through the barren solution pump, the rich solution pump, the barren and rich solution heat exchanger and the barren solution cooler, the outlet of the regeneration tower is connected with the regeneration gas cooler, the outlet of the regeneration gas cooler is connected with the regeneration gas separator, the regeneration gas separator is connected with the carbon dioxide absorption tower through the reflux pump, and the reboiler is communicated with the regeneration tower. The invention can effectively capture and treat the carbon dioxide in the tail gas and improve the tail gas treatment efficiency.

Description

Tail gas treatment device suitable for domestic waste schizolysis produces
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to a tail gas treatment device suitable for cracking household garbage.
Background
The tail gas that domestic waste pyrolysis furnace produced now is generally administered through spray column and active carbon adsorption device, and the smoke and dust in the tail gas is washed simultaneously to the tail gas cooling through the spray column, then enters into active carbon adsorption device, absorbs the organic matter in the tail gas. Wherein, the tail gas contains moisture, tar, particulate matters, carbon dioxide, carbon monoxide and other atmospheric pollutants. As the emission reduction of greenhouse gas carbon dioxide is a big problem in the treatment of atmospheric pollution at present, the great attention of the international society is drawn.
The tail gas treatment process that present domestic waste pyrolysis furnace produced is fairly simple, does not administer to the carbon dioxide in the tail gas, can not carry out effectual entrapment to the carbon dioxide in the tail gas and handle, does not have the device that is used for carbon dioxide to collect specially, leads to carbon dioxide directly to discharge from the atmosphere to there is tail gas treatment effeciency low, is unfavorable for environmental protection scheduling problem.
Disclosure of Invention
The embodiment of the invention aims to provide a tail gas treatment device suitable for cracking domestic garbage, and aims to effectively capture and treat carbon dioxide in tail gas and improve the tail gas treatment efficiency.
The embodiment of the invention provides a tail gas treatment device suitable for cracking household garbage, which comprises an electric tar precipitator, a carbon monoxide catalytic bed, a spray tower, a spray pump, a carbon dioxide absorption tower, a liquid-rich pump, a lean-rich liquid heat exchanger, a lean liquid cooler, a regeneration tower, a reboiler, a lean liquid pump, a regenerated gas cooler, a regenerated gas separator and a reflux pump, wherein the carbon monoxide catalytic bed is arranged behind the electric tar precipitator, the spray tower is arranged behind the carbon monoxide catalytic bed, the spray pump is connected with the spray tower to form internal circulation, the carbon dioxide absorption tower is arranged behind the spray tower, the regeneration tower is arranged behind the carbon dioxide absorption tower, the regeneration tower is connected with the carbon dioxide absorption tower through the lean liquid pump, the liquid-rich liquid heat exchanger and the lean liquid cooler, and an outlet of the regeneration tower is connected with the regenerated gas cooler, the outlet of the regenerated gas cooler is connected with a regenerated gas separator, the regenerated gas separator is connected with the carbon dioxide absorption tower through the reflux pump, and the reboiler is communicated with the regeneration tower.
Further, the tail gas treatment device still includes the draught fan, the draught fan set up in between spray column and the carbon dioxide absorption tower.
Further, the carbon dioxide absorption tower is connected with the upper part of the regeneration tower through a rich liquid pump and a lean and rich liquid heat exchanger in sequence.
Further, the lean liquid cooler, the lean rich liquid heat exchanger, the regeneration gas cooler and the reboiler are all tube and tube heat exchangers.
Furthermore, the electric tar precipitator, the carbon monoxide catalytic bed, the spray tower, the spray pump, the carbon dioxide absorption tower, the rich liquor pump, the lean and rich liquor heat exchanger, the lean liquor cooler, the regeneration tower, the reboiler, the lean liquor pump, the regenerated gas cooler, the regenerated gas separator and the reflux pump are connected through pipelines, and the interfaces are connected through flanges.
According to the embodiment of the invention, firstly, tar, dust and water vapor in tail gas generated by cracking household garbage are captured by an electric tar precipitator, then carbon monoxide is oxidized into carbon dioxide by a carbon monoxide catalytic bed, and then the carbon dioxide enters a carbon dioxide absorption tower through a spray tower and a spray pump, and absorbs a large amount of carbon dioxide, and the residual small amount of carbon dioxide enters the carbon dioxide absorption tower again through a pregnant solution pump, a lean-rich solution heat exchanger, a regeneration tower, a reboiler, a lean solution pump and a lean solution cooler for secondary absorption of the carbon dioxide; in addition, carbon dioxide generated in the regeneration tower is cooled through the regeneration gas cooler and then enters the regeneration gas separator for water-gas separation, and the carbon dioxide is purified and then enters the subsequent treatment process, so that the carbon dioxide in the tail gas is effectively captured and treated, and the tail gas treatment efficiency is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a tail gas treatment device suitable for cracking domestic garbage according to an embodiment of the present invention.
The reference numbers in the figures are respectively:
an electrical tar precipitator 1; a carbon monoxide catalytic bed 2; a spray tower 3; a spray pump 4;
an induced draft fan 5; a carbon dioxide absorption tower 6; a rich liquid pump 7; a barren liquor pump 8;
a lean liquid cooler 9; a lean-rich liquid heat exchanger 10; a regeneration tower 11; a regeneration gas cooler 12;
a regeneration gas separator 13; a reboiler 14; a reflux pump 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
As shown in fig. 1, the tail gas treatment device suitable for the cracking of household garbage provided by the embodiment of the present invention may include an electrical tar precipitator 1, a carbon monoxide catalytic bed 2, a spray tower 3, a spray pump 4, a carbon dioxide absorption tower 6, a rich liquor pump 7, a lean-rich liquor heat exchanger 10, a lean liquor cooler 9, a regeneration tower 11, a reboiler 14, a lean liquor pump 8, a regeneration gas cooler 12, a regeneration gas separator 13, a reflux pump 15, and the like.
The electric tar precipitator 1 is coke oven gas primary cooling equipment for separating tar droplets and gas by using the action of a high-voltage direct-current electric field, and adopts three structural forms, namely a concentric circle type, a tubular type, a honeycomb type and the like. Specifically, the electrical tar precipitator 1 is used for trapping tar, dust and moisture in the tail gas and then introducing the trapped tar, dust and moisture into the carbon monoxide catalytic bed 2.
Wherein, the carbon monoxide catalytic bed 2 is arranged behind the electrical tar precipitator 1, and the carbon monoxide catalytic bed 2 is used for oxidizing carbon monoxide into carbon dioxide and then enters the carbon dioxide absorption tower 6 through the spray tower 3 and the spray pump 4.
In this embodiment, the spray tower 3 is disposed behind the carbon monoxide catalytic bed 2, the spray pump 4 is connected to the spray tower 3 to form an internal circulation, and the carbon dioxide absorption tower 6 is disposed behind the spray tower 3. In the implementation process, the oxidized carbon dioxide enters the spray tower 3 and contacts with the industrial water conveyed by the spray pump 4 to reduce the temperature, so that the carbon dioxide gas can be reduced from 130 ℃ to below 50 ℃ and then enters the carbon dioxide absorption tower 6. Absorption liquid ethanolamine is placed in the carbon dioxide absorption tower 6, the absorption liquid ethanolamine is used for absorbing the carbon dioxide, and more than 95% of the carbon dioxide can be absorbed.
Preferably, the tail gas treatment device further comprises an induced draft fan 5, and the induced draft fan 5 is arranged between the spray tower 3 and the carbon dioxide absorption tower 6. Wherein the induced draft fan 5 is used for conveying the carbon dioxide in the spray tower 3 to the carbon dioxide absorption tower 6.
The regeneration tower 11 is arranged behind the carbon dioxide absorption tower 6, and the regeneration tower 11 is connected with the carbon dioxide absorption tower 6 through the lean liquid pump 8, the rich liquid pump 7, the lean-rich liquid heat exchanger 10 and the lean liquid cooler 9. Preferably, the carbon dioxide absorption tower 6 is connected to the upper part of the regeneration tower 11 through a rich liquid pump 7 and a lean rich liquid heat exchanger 10 in this order.
During operation, rich liquor generated by the carbon dioxide absorption tower 6 enters the lean and rich liquor heat exchanger 10 through the rich liquor pump 7 for liquor exchange and temperature rise, then enters the regeneration tower 11, flows into the bottom of the regeneration tower 11 from top to bottom, enters the reboiler 14 for temperature rise, and then flows back to the regeneration tower 11, and the regenerated lean liquor is cooled through the lean and rich liquor heat exchanger 10 and is conveyed into the carbon dioxide absorption tower 6 through the lean liquor pump 8. In this way, the remaining small amount of carbon dioxide can be re-introduced into the carbon dioxide absorption tower 6 through the rich liquid pump 7, the lean rich liquid heat exchanger 10, the regeneration tower 11, the reboiler 14, the lean liquid pump 8, and the lean liquid cooler 9 to perform secondary absorption of carbon dioxide.
Further, the outlet of the regeneration tower 11 is connected to the regeneration gas cooler 12, the outlet of the regeneration gas cooler 12 is connected to the regeneration gas separator 13, the regeneration gas separator 13 is connected to the carbon dioxide absorption tower 6 by the reflux pump 15, and the reboiler 14 is communicated with the regeneration tower 11. The carbon dioxide generated by the regeneration tower 11 is cooled by the regeneration gas cooler 12 and then enters the regeneration gas separator 13 for gas-water separation, the purified pure carbon dioxide enters the subsequent process, and the solution separated by the regeneration gas separator 13 returns to the regeneration tower 11 through the reflux pump 15.
In this way, the carbon dioxide generated in the regeneration tower 11 is cooled by the regeneration gas cooler 12 and then enters the regeneration gas separator 13 for water-gas separation, and the carbon dioxide is purified and then enters the subsequent treatment process, so that the carbon dioxide in the tail gas is effectively captured and treated, and the tail gas treatment efficiency is improved.
In this embodiment, the lean liquid cooler 9, the lean rich liquid heat exchanger 10, the regeneration gas cooler 12, and the reboiler 14 are all tube and tube heat exchangers.
In the implementation process, the electric tar precipitator 1, the carbon monoxide catalytic bed 2, the spray tower 3, the spray pump 4, the carbon dioxide absorption tower 6, the rich liquor pump 7, the lean-rich liquor heat exchanger 10, the lean liquor cooler 9, the regeneration tower 11, the reboiler 14, the lean liquor pump 8, the regeneration gas cooler 12, the regeneration gas separator 13 and the reflux pump 15 are connected through pipelines, and the interfaces are in flange connection.
In summary, in the embodiment of the invention, firstly, tar, dust and water vapor in tail gas generated by cracking household garbage are captured by the electrical tar precipitator 1, then carbon monoxide is oxidized into carbon dioxide by the carbon monoxide catalytic bed 2, and then enters the carbon dioxide absorption tower 6 through the spray tower 3 and the spray pump 4, and absorbs a large amount of carbon dioxide, and the remaining small amount of carbon dioxide enters the carbon dioxide absorption tower 6 again through the rich liquid pump 7, the lean-rich liquid heat exchanger 10, the regeneration tower 11, the reboiler 14, the lean liquid pump 8 and the lean liquid cooler 9 for secondary absorption of carbon dioxide; in addition, the carbon dioxide generated in the regeneration tower 11 is cooled by the regeneration gas cooler 12 and then enters the regeneration gas separator 13 for water-gas separation, and the carbon dioxide is purified and then enters the subsequent treatment process, so that the carbon dioxide in the tail gas is effectively captured and treated, and the tail gas treatment efficiency is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A tail gas treatment device suitable for cracking household garbage to generate is characterized by comprising an electric tar precipitator, a carbon monoxide catalytic bed, a spray tower, a spray pump, a carbon dioxide absorption tower, a liquid-rich pump, a lean and rich liquid heat exchanger, a lean liquid cooler, a regeneration tower, a reboiler, a lean liquid pump, a regenerated gas cooler, a regenerated gas separator and a reflux pump, wherein the carbon monoxide catalytic bed is arranged behind the electric tar precipitator, the spray tower is arranged behind the carbon monoxide catalytic bed, the spray pump is connected with the spray tower to form internal circulation, the carbon dioxide absorption tower is arranged behind the spray tower, the regeneration tower is arranged behind the carbon dioxide absorption tower, the regeneration tower is connected with the carbon dioxide absorption tower through the lean liquid pump, the rich liquid pump, the lean and rich liquid heat exchanger and the lean liquid cooler, and an outlet of the regeneration tower is connected with the regenerated gas cooler, the outlet of the regenerated gas cooler is connected with a regenerated gas separator, the regenerated gas separator is connected with the carbon dioxide absorption tower through the reflux pump, and the reboiler is communicated with the regeneration tower.
2. The device for treating the tail gas generated by cracking the household garbage according to claim 1, further comprising an induced draft fan, wherein the induced draft fan is arranged between the spray tower and the carbon dioxide absorption tower.
3. The device for treating the tail gas generated by cracking the household garbage according to claim 1, wherein the carbon dioxide absorption tower is connected with the upper part of the regeneration tower sequentially through a rich liquid pump and a lean and rich liquid heat exchanger.
4. The apparatus for treating tail gas generated by cracking of domestic garbage according to claim 1, wherein the lean solution cooler, the lean and rich solution heat exchanger, the regeneration gas cooler and the reboiler are all tube and tube heat exchangers.
5. The device for treating the tail gas generated by cracking the household garbage according to claim 1, wherein the electric tar precipitator, the carbon monoxide catalytic bed, the spray tower, the spray pump, the carbon dioxide absorption tower, the rich liquid pump, the lean and rich liquid heat exchanger, the lean liquid cooler, the regeneration tower, the reboiler, the lean liquid pump, the regenerated gas cooler, the regenerated gas separator and the reflux pump are connected through pipelines, and the interfaces are connected through flanges.
CN202210228496.2A 2022-03-08 2022-03-08 Tail gas treatment device suitable for domestic waste schizolysis produces Pending CN114713008A (en)

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CN202210228496.2A CN114713008A (en) 2022-03-08 2022-03-08 Tail gas treatment device suitable for domestic waste schizolysis produces

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Application Number Priority Date Filing Date Title
CN202210228496.2A CN114713008A (en) 2022-03-08 2022-03-08 Tail gas treatment device suitable for domestic waste schizolysis produces

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100276640A1 (en) * 2009-04-30 2010-11-04 Mitsubishi Heavy Industries, Ltd. Method and apparatus for separating acidic gases from syngas
CN104857816A (en) * 2015-04-29 2015-08-26 古浪鑫辉化工有限公司 System and method for producing food grade carbon dioxide through lime kiln tail gases
CN105749724A (en) * 2016-04-22 2016-07-13 杭州尹力环保科技有限公司 Waste gas purification method and device of naphthalene method phthalic anhydride production equipment
CN109157957A (en) * 2018-10-26 2019-01-08 航天环境工程有限公司 A kind of ultra-clean processing method of electrolytic aluminium carbon anode roasting flue gas and the system and application for implementing this method
CN208726970U (en) * 2018-06-19 2019-04-12 邸润东 A kind of purification device of petrochemical industry exhaust gas
CN113144836A (en) * 2021-05-20 2021-07-23 中国华电科工集团有限公司 Carbon dioxide capture rich solution flash evaporation regeneration waste heat recovery system
CN113975950A (en) * 2021-11-04 2022-01-28 大连理工大学 System and method for synchronously recovering carbon dioxide and nitrogen in flue gas by chemical method and PSA (pressure swing adsorption) method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100276640A1 (en) * 2009-04-30 2010-11-04 Mitsubishi Heavy Industries, Ltd. Method and apparatus for separating acidic gases from syngas
CN104857816A (en) * 2015-04-29 2015-08-26 古浪鑫辉化工有限公司 System and method for producing food grade carbon dioxide through lime kiln tail gases
CN105749724A (en) * 2016-04-22 2016-07-13 杭州尹力环保科技有限公司 Waste gas purification method and device of naphthalene method phthalic anhydride production equipment
CN208726970U (en) * 2018-06-19 2019-04-12 邸润东 A kind of purification device of petrochemical industry exhaust gas
CN109157957A (en) * 2018-10-26 2019-01-08 航天环境工程有限公司 A kind of ultra-clean processing method of electrolytic aluminium carbon anode roasting flue gas and the system and application for implementing this method
CN113144836A (en) * 2021-05-20 2021-07-23 中国华电科工集团有限公司 Carbon dioxide capture rich solution flash evaporation regeneration waste heat recovery system
CN113975950A (en) * 2021-11-04 2022-01-28 大连理工大学 System and method for synchronously recovering carbon dioxide and nitrogen in flue gas by chemical method and PSA (pressure swing adsorption) method

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