WO2013039040A1 - Co2回収装置およびco2回収方法 - Google Patents
Co2回収装置およびco2回収方法 Download PDFInfo
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- WO2013039040A1 WO2013039040A1 PCT/JP2012/073101 JP2012073101W WO2013039040A1 WO 2013039040 A1 WO2013039040 A1 WO 2013039040A1 JP 2012073101 W JP2012073101 W JP 2012073101W WO 2013039040 A1 WO2013039040 A1 WO 2013039040A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 by absorption
- B01D53/1418—Recovery of products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20478—Alkanolamines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/14—Separation 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 by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Definitions
- the present invention relates to a CO 2 recovery device and a CO 2 recovery method that reduce the concentration of amine compounds that remain and are released in decarbonized exhaust gas from which CO 2 has been removed by contact with an absorbing solution.
- Patent Document 1 the washing liquid is brought into gas-liquid contact with the decarbonized exhaust gas from which CO 2 has been absorbed and removed by gas-liquid contact with the absorbent, thereby washing the water with which the amine compound entrained in the decarbonized exhaust gas is recovered. It is shown that a plurality of stages are provided, and the recovery process of the amine compound accompanying the decarbonation exhaust gas is sequentially performed in the plurality of stages of water washing sections.
- Cleaning solution of Patent Document 1 in the processing of the CO 2 from the absorbed amine-based absorbing solution by stripping the CO 2 to play the amine absorbing solution, the condensed water separated by condensing the moisture contained in the CO 2 is used It has been.
- Patent Document 2 the cooling unit that cools the decarbonized exhaust gas from which CO 2 has been absorbed and removed by gas-liquid contact with the absorbing liquid, and the countercurrent contact between the condensed water condensed in the cooling unit and the decarbonized exhaust gas. The thing which provided the contact part to make it show is shown. Further, in Patent Document 2, the washing liquid is brought into gas-liquid contact with the decarbonized exhaust gas from which CO 2 has been absorbed and removed by gas-liquid contact with the absorbing liquid, thereby washing the water with which the amine compound entrained in the decarbonized exhaust gas is recovered. The cleaning liquid is condensed water condensed in a cooling tower that cools the exhaust gas before CO 2 is recovered.
- the present invention solves the above-described problems, and provides a CO 2 recovery device and a CO 2 recovery method capable of further reducing the concentration of amine compounds remaining and released in the decarbonation exhaust gas. Let it be an issue.
- the first aspect of the present invention to solve the problems described above, CO 2 absorption tower for contacting the CO 2 containing exhaust gas and the CO 2 absorbing liquid containing CO 2 to remove CO 2 and purifying exhaust gas
- the absorbent regenerator to regenerate the CO 2 absorbing solution by separating the CO 2 from the CO 2 absorbent having absorbed CO 2
- the lean solution from which CO 2 has been removed by the absorbing solution regeneration tower CO 2 absorption tower in a CO 2 is reused
- the CO 2 absorption tower, and the CO 2 absorbing section for absorbing the CO 2 in the CO 2 content in the exhaust gas by the CO 2 absorbing solution after the gas flow of the CO 2 absorbing section installed in a flow side, to cool the CO 2 removed gas by the washing liquid, entrained CO 2 absorbing solution and water washing section for recovering, the top of the cleaning liquid containing the CO 2 absorbing liquid that has been recovered in the washing unit
- the washing unit Cleaning liquid circulation line that is supplied from the side to circulate and wash, and the washing From the circulation line, and a concentration part
- a CO 2 recovery apparatus having a gas discharge line for joining the separated gas component to the purified exhaust gas discharged from the CO 2 absorption tower.
- the third invention is the first invention, the upstream side of the CO 2 absorber, a cooling tower is provided for cooling the CO 2 containing exhaust gas containing CO 2, purifying the exhaust gas discharged from the CO 2 absorption tower temperature (T 2), said cooling tower cooled CO 2 a CO 2 containing exhaust gas which contains the temperature (T 1) lower than (T 1> T 2) CO 2 recovery apparatus and setting It is in.
- a fourth invention is the CO 2 recovery apparatus according to the first invention, wherein water is supplied from outside or inside the system to the water washing section.
- a fifth invention is the separation and the CO 2 absorber to remove CO 2 by contacting the CO 2 containing exhaust gas and the CO 2 absorbing liquid containing CO 2, the CO 2 from the CO 2 absorbent having absorbed CO 2 and by using the absorbent regenerator to regenerate the CO 2 absorbing solution, the lean solution from which CO 2 has been removed by the absorbing solution regeneration tower a CO 2 recovery method be reused in the CO 2 absorber, the CO 2 At the downstream side of the absorption tower, the CO 2 removal exhaust gas is cooled by the cleaning liquid, and a part of the water washing part for recovering the accompanying CO 2 absorbing liquid is extracted as the extracted liquid, and the CO 2 absorption in the extracted liquid In the CO 2 recovery method, the liquid is concentrated and the concentrated liquid is fed to the absorption liquid regeneration tower side.
- the present invention it is possible to further reduce the concentration of amine compounds in the absorption liquid remaining and released in the decarbonized exhaust gas, and to concentrate the collected absorption liquid for reuse.
- FIG. 1 is a schematic diagram of a CO 2 recovery apparatus according to the first embodiment.
- FIG. 2 is a schematic diagram of another CO 2 recovery apparatus according to the first embodiment.
- FIG. 3 is a schematic diagram of another CO 2 recovery apparatus according to the first embodiment.
- FIG. 4 is a schematic diagram of a CO 2 recovery apparatus according to the second embodiment.
- FIG. 1 is a schematic diagram of a CO 2 recovery apparatus according to the first embodiment.
- 2 and 3 are schematic views of other CO 2 recovery apparatuses according to the first embodiment. As shown in FIG.
- CO 2 recovery apparatus 10A CO 2 containing exhaust gas 11A and the CO 2 absorbing liquid containing CO 2 (lean solution 12B) and the contacting is removed the CO 2 A CO 2 absorption tower (hereinafter also referred to as “absorption tower”) 13 as the purified exhaust gas 11B, an absorption liquid regeneration tower 14 for regenerating a CO 2 absorption liquid (rich solution 12A) that has absorbed CO 2 , and the absorption liquid regeneration tower (Hereinafter also referred to as “regeneration tower”) 14 is a CO 2 recovery device for reusing the lean solution 12B from which CO 2 has been removed in the CO 2 absorption tower 13, wherein the CO 2 absorption tower 13 is a CO 2 absorption liquid.
- a first washing section 13B consisting of water washing section 13B 1 and the second washing section 13B 2 for recovering 2, the cleaning liquid 20 containing the CO 2 absorbing liquid 12 recovered in the overhead of the second water-washing section 13B 2 wherein A cleaning liquid circulation line L 1 that circulates directly from the top side of the water washing section 13B, and an extraction line L 2 that extracts a part of the cleaning liquid 20 including the CO 2 absorbent 12 as an extraction liquid 21 from the cleaning liquid circulation line L 1.
- the concentration unit 22 that concentrates the CO 2 absorbent while separating the gas component (water vapor) 24 from the extracted liquid 21, and the concentrated solution 23 that is concentrated in the concentration unit 22 is supplied to the absorbent regeneration tower 14 side.
- the liquid supply line L 3 and the gas discharge line L 4 that joins the separated gas component (water vapor) 24 to the purified exhaust gas 11B discharged from the absorption tower 13 are provided.
- the cleaning liquid 20 is circulated by the washing liquid circulation line L 1.
- an extraction fluid 21 from the first washing unit 13B 1 is merged into the CO 2 absorbing liquid 12.
- the CO 2 -containing exhaust gas 11 ⁇ / b > A is in counterflow contact with the CO 2 absorption liquid 12 based on, for example, an alkanolamine in a CO 2 absorption section 13 ⁇ / b > A provided on the lower side of the CO 2 absorption tower 13.
- CO 2 in the CO 2 containing exhaust gas 11A is absorbed by the CO 2 absorbing liquid 12 by a chemical reaction (R-NH 2 + H 2 O + CO 2 ⁇ R-NH 3 HCO 3).
- the CO 2 removal exhaust gas after CO 2 removal rises to the water washing section 13B side via the chimney tray 16, and gas-liquid contact with washing liquid 20 supplied from the top side of the washing unit 13B, the CO 2 flue gas The accompanying CO 2 absorbent 12 is recovered. Thereafter, the purified exhaust gas 11B from which the CO 2 absorbent 12 has been removed is discharged to the outside from the top 13C of the CO 2 absorption tower 13.
- Reference numeral 73 denotes a mist eliminator that captures mist in the gas.
- the rich solution 12 ⁇ / b > A that has absorbed CO 2 is pressurized by a rich solvent pump 51 interposed in the rich solution supply pipe 50, and the lean solution 12 ⁇ / b> B regenerated in the absorbent regenerator 14 in the rich / lean solution heat exchanger 52. And is supplied to the top side of the absorption liquid regeneration tower 14.
- the rich solution 12A released into the tower from the top side of the regeneration tower 14 releases most of the CO 2 by heating with water vapor from the bottom of the tower.
- the CO 2 absorbent 12 that has released part or most of the CO 2 in the regeneration tower 14 is referred to as a “semi-lean solution”.
- the semi-lean solution (not shown) flows down to the bottom of the regeneration tower 14, it becomes a lean solution 12B from which almost all of the CO 2 has been removed.
- the lean solution 12B is heated by saturated steam 62 in the regeneration heater 61 interposed in the circulation line L 20.
- the saturated steam 62 after heating becomes steam condensed water 63.
- the regenerated CO 2 absorbent (lean solution 12B) is sent to the CO 2 absorption tower 13 side by the lean solution pump 54 via the lean solution supply pipe 53, and is circulated and used as the CO 2 absorbent 12. Therefore, the CO 2 absorbing liquid 12 forms a closed path for circulating a CO 2 absorption tower 13 and the absorption solution regenerator 14 is reused in the CO 2 absorbing section 13A of the CO 2 absorber 13. Note that the CO 2 absorbent 12 is supplied from a replenishment line (not shown) as needed, and the CO 2 absorbent is regenerated by a reclaimer (not shown) as needed.
- CO 2 containing exhaust gas 11A supplied to the CO 2 absorber 13, in the cooling tower 70 provided on the front side is cooled by cooling water 71 and is then introduced into the CO 2 absorber 13.
- Reference numeral 72 is a circulation pump
- 74 is a cooler
- L 10 is a cooling water circulation line
- L 11 is a CO 2 -containing exhaust gas supply line
- L 12 is a purified exhaust gas discharge line.
- the CO 2 absorbing liquid 12 to be circulated utilizing the CO 2 absorption tower 13 and the absorption solution regenerator 14 is in the washing unit 13B, and the CO 2 removing exhaust gas from which CO 2 has been removed, the washing liquid 20 toward The CO 2 absorption liquid 12 entrained in the CO 2 removal exhaust gas is absorbed and removed by the cleaning liquid 20 to prevent emission to the outside of the absorption tower 13.
- a concentrating part 22 is provided in this embodiment, and a concentrating liquid supply line L 3 for feeding the concentrating liquid 23 concentrated by the concentrating part 22. Then, it is fed to the absorption liquid regeneration tower 14 side, and the CO 2 absorption liquid 12 is concentrated and used.
- a part of the cleaning liquid 20 circulating in the water washing section 13B is extracted and concentrated in the concentrating section 22 to form a concentrated liquid 23, and this concentrated liquid 23 is supplied to a separation drum 43 that separates CO 2 in the absorption liquid regeneration tower 14. I am trying to send it.
- the separation drum 43 separates the CO 2 gas 45 from the CO 2 gas 41 accompanied with water vapor to obtain condensed water 44, and this condensed water 44 is refluxed to the upper part of the absorption liquid regeneration tower 14.
- the lean solution 12B is reused in the CO 2 absorption tower 13 again.
- the supply destination of the concentrated liquid 23 is not limited to the separation drum 43, and may be a condensed water line L 22 for returning the condensed water 44 to the upper portion of the regeneration tower 14 as shown in FIG. 2, for example. Further, as shown in FIG. 3, the supply destination of the concentrated solution 23 may be directly introduced into the upper portion of the regeneration tower 14.
- a part of the condensed water 44 from the condensed water line L 22 ( ⁇ 1) withdrawn, the supply to the cleaning liquid circulation line L 1 ( ⁇ 1) to may be utilized as a washing liquid.
- Some of the cooling water 71 in the cooling tower 70 withdrawn ( ⁇ 2), supplied to the cleaning liquid circulation line L 1 ( ⁇ 2) to may be utilized as a washing liquid.
- water from outside the system for example, ion exchange water in the process system
- water from outside the system is supplied to the cleaning liquid circulation line L 1 (* 3 ) and used as a cleaning liquid. You may do it.
- the cleaning liquid 20 when the cleaning liquid 20 is circulated in the cleaning liquid circulation line L 1 , the CO 2 absorbing liquid is recovered, and the recovered CO 2 absorbing liquid is used as a concentrated liquid, whereby the purified exhaust gas 11B. It is possible to reduce the amount of volatile components derived from the CO 2 absorbing solution and the absorbing solution accompanying from the atmosphere.
- the concentration unit 22 for example, an evaporation device, a vapor compression concentration device, or the like can be used.
- the evaporation apparatus heats and evaporates the cleaning liquid 20 while storing it in the evaporator, supplies the concentrated liquid 23 to the next evaporator, and uses the water vapor 24 as a heating source in the next evaporator.
- the thing provided with two or more evaporators can be illustrated.
- the vapor compression type concentrator is used as a heat source for heating by pressurizing the water vapor 24 generated in the evaporator with a compressor to increase the temperature, thereby reducing power consumption during concentration. It can be done.
- the gas discharge line L 4 from which the gas component (water vapor) 24 separated by the concentration unit 22 is led is provided with a separation drum to prevent moisture from being entrained outside and to dissipate moisture outside the system. Is preventing.
- the gas component 24 is introduced to the tower top 13C side of the absorption tower 13, it is discharged to the outside as it is. Therefore, when ammonia is accompanied, the downstream side of the water washing section 13B (tower) It may be introduced into the top).
- FIG. 4 is a schematic diagram of a CO 2 recovery apparatus according to the second embodiment. Note that the CO 2 recovery apparatus 10A same configuration as that according to the first embodiment shown in FIG. 1, and redundant description are denoted by the same reference numerals will be omitted. As shown in FIG. 4, in the CO 2 recovery apparatus 10B of the present embodiment, thermometers 81 and 82 are provided in the CO 2 -containing exhaust gas supply line L 11 and the purified exhaust gas discharge line L 12 , respectively, to measure the gas temperature. .
- the gas temperature (T 2 ) of the purified exhaust gas 11B at the outlet of the water washing section 13B is set lower (T 1 > T 2 ) than the gas temperature (T 1 ) at the outlet of the cooling tower 70 by a control device (not shown). You are in control.
- the amount of condensed water can be increased by lowering the gas temperature (T 2 ) of the purified exhaust gas 11B at the outlet of the CO 2 absorption tower 13, resulting in a decrease in the amine concentration in the liquid in the water washing section 13B.
- the amine vapor pressure is reduced, the amount of CO 2 absorbing liquid (amine solution or the like) entrained can be reduced, and the release to the outside can be reduced.
- the amine compound concentration ratio in the gas of the purified exhaust gas 11B is 35 ° C., assuming that 40 ° C. is 1. In this case, it was confirmed that the value dropped to 0.5.
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Abstract
Description
図1に示すように、本実施例に係るCO2回収装置10Aは、CO2を含有するCO2含有排ガス11AとCO2吸収液(リーン溶液12B)とを接触させてCO2を除去して浄化排ガス11BとするCO2吸収塔(以下「吸収塔」ともいう)13と、CO2を吸収したCO2吸収液(リッチ溶液12A)を再生する吸収液再生塔14と、前記吸収液再生塔(以下「再生塔」ともいう)14でCO2が除去されたリーン溶液12BをCO2吸収塔13で再利用するCO2回収装置であって、前記CO2吸収塔13が、CO2吸収液12(リーン溶液12B)でCO2含有排ガス11A中のCO2を吸収するCO2吸収部13Aと、前記CO2吸収部13Aの上部(ガス流れ後流)側に設けられ、CO2除去排ガスを冷却すると共に、同伴するCO2吸収液12を回収する第1水洗部13B1及び第2水洗部13B2からなる水洗部13Bと、前記塔頂側の第2水洗部13B2で回収されたCO2吸収液12を含む洗浄液20を前記水洗部13Bの頂部側から直接循環する洗浄液循環ラインL1と、前記洗浄液循環ラインL1から、CO2吸収液12を含む洗浄液20の一部を抜出液21として抜出す抜出しラインL2と、抜出液21からガス成分(水蒸気)24を分離しつつCO2吸収液を濃縮する濃縮部22と、前記濃縮部22で濃縮した濃縮液23を吸収液再生塔14側に送給する濃縮液送給ラインL3と、分離されたガス成分(水蒸気)24を、吸収塔13から排出される浄化排ガス11Bに合流するガス排出ラインL4とを具備するものである。
なお、第1水洗部13B1においても、洗浄液循環ラインL1とにより洗浄液20が循環されている。
なお、図示していないが、第1水洗部13B1からの抜出液21はCO2吸収液12に合流される。
その後、CO2吸収液12が除去された浄化排ガス11Bは、CO2吸収塔13の塔頂部13Cから外部へ排出される。なお、符号73はガス中のミストを捕捉するミストエリミネータを図示する。
そして、水蒸気を伴ったCO2ガス41がガス排出ラインL21により導出され、ガス排出ラインL21に介装されたコンデンサ42により水蒸気が凝縮され、分離ドラム43にて凝縮水44が分離され、CO2ガス45が系外に放出されて、別途圧縮回収等の後処理がなされる。
分離ドラム43にて分離された凝縮水44は凝縮水ラインL22に介装された凝縮水循環ポンプ46にて吸収液再生塔14の上部に供給される。
なお、図示していないが、一部の凝縮水44はCO2吸収液の洗浄液20として水洗部13Bの頂部に供給され、CO2除去排ガスに同伴するCO2吸収液12の吸収に用いている。
よって、CO2吸収液12は、CO2吸収塔13と吸収液再生塔14とを循環する閉鎖経路を形成し、CO2吸収塔13のCO2吸収部13Aで再利用される。なお、必要に応じて図示しない補給ラインによりCO2吸収液12は供給され、また必要に応じて図示しないリクレーマによりCO2吸収液を再生するようにしている。
この分離ドラム43は、水蒸気を伴ったCO2ガス41からCO2ガス45を分離し、凝縮水44を得るものであり、この凝縮水44は、吸収液再生塔14の上部に還流されるので、リーン溶液12Bとなり、再度CO2吸収塔13で再利用されることとなる。
また、図3に示すように、濃縮液23の供給先を、再生塔14の上部に直接導入するようにしてもよい。
なお、ガス成分24を吸収塔13の塔頂部13C側に導入する場合には、そのまま外部に放出されるので、アンモニアが同伴されるような場合には、その水洗部13Bの後流側(塔頂部内)に導入するようにしてもよい。
図4に示すように、本実施例のCO2回収装置10Bでは、CO2含有排ガス供給ラインL11及び浄化排ガス排出ラインL12に各々温度計81、82を設け、ガス温度を計測している。
そして、計測の結果、図示しない制御装置により、水洗部13B出口の浄化排ガス11Bのガス温度(T2)を冷却塔70出口のガス温度(T1)よりも低く(T1>T2)設定するように制御している。
11A CO2含有排ガス
12 CO2吸収液
12A リッチ溶液
12B リーン溶液
13 CO2吸収塔(吸収塔)
14 吸収液再生塔(再生塔)
20 洗浄液
21 抜出液
22 濃縮部
23 濃縮液
24 ガス成分
Claims (5)
- CO2を含有するCO2含有排ガスとCO2吸収液とを接触させてCO2を除去して浄化排ガスとするCO2吸収塔と、
CO2を吸収したCO2吸収液からCO2を分離してCO2吸収液を再生する吸収液再生塔と、
前記吸収液再生塔でCO2が除去されたリーン溶液をCO2吸収塔で再利用するCO2回収装置であって、
前記CO2吸収塔が、
CO2吸収液によりCO2含有排ガス中のCO2を吸収するCO2吸収部と、
前記CO2吸収部のガス流れ後流側に設けられ、洗浄液によりCO2除去排ガスを冷却すると共に、同伴するCO2吸収液を回収する水洗部と、
前記水洗部で回収されたCO2吸収液を含む洗浄液を前記水洗部の頂部側から供給して循環・洗浄する洗浄液循環ラインと、
前記洗浄液循環ラインから、CO2吸収液を含む洗浄液の一部を抜出液として抜出す抜出しラインと、
前記抜出液からガス成分を分離しつつCO2吸収液を濃縮する濃縮部と、
前記濃縮部で濃縮した濃縮液を吸収液再生塔側に送給する濃縮液送給ラインとを具備することを特徴とするCO2回収装置。 - 請求項1において、
分離されたガス成分を、CO2吸収塔から排出される浄化排ガスに合流するガス排出ラインを有することを特徴とするCO2回収装置。 - 請求項1において、
CO2吸収塔の前流側に、CO2を含有するCO2含有排ガスを冷却する冷却塔を設け、
前記CO2吸収塔から排出される浄化排ガスの温度(T2)を、
前記冷却塔で冷却されたCO2を含有するCO2含有排ガスの温度(T1)より低く(T1>T2)設定することを特徴とするCO2回収装置。 - 請求項1において、
系外又は系内から水を水洗部に供給することを特徴とするCO2回収装置。 - CO2を含有するCO2含有排ガスとCO2吸収液とを接触させてCO2を除去するCO2吸収塔と、CO2を吸収したCO2吸収液からCO2を分離してCO2吸収液を再生する吸収液再生塔とを用い、前記吸収液再生塔でCO2が除去されたリーン溶液をCO2吸収塔で再利用するCO2回収方法であって、
前記CO2吸収塔の後流側において、洗浄液によりCO2除去排ガスを冷却すると共に、同伴するCO2吸収液を回収する水洗部の一部を抜出液として抜出し、
前記抜出液中のCO2吸収液を濃縮し、濃縮液を前記吸収液再生塔側へ送給することを特徴とするCO2回収方法。
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JP6581768B2 (ja) | 2014-11-04 | 2019-09-25 | 三菱重工エンジニアリング株式会社 | Co2回収装置およびco2回収方法 |
CN105233689B (zh) * | 2015-10-28 | 2017-05-24 | 铜陵有色金属集团股份有限公司铜冠冶化分公司 | 一种高效低能耗的有机胺湿法烟气脱硫解吸系统 |
JP6726039B2 (ja) * | 2016-06-30 | 2020-07-22 | 株式会社東芝 | 酸性ガス回収装置および酸性ガス回収方法 |
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JP6811759B2 (ja) * | 2018-11-09 | 2021-01-13 | 三菱重工エンジニアリング株式会社 | Co2回収装置およびco2回収方法 |
CN113521966A (zh) * | 2021-07-26 | 2021-10-22 | 浙江大学 | 基于传质-反应调控的分区多级循环co2捕集浓缩方法 |
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