AU2015210222B2 - Gas-liquid contactor and CO2 recovery device - Google Patents

Gas-liquid contactor and CO2 recovery device Download PDF

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Publication number
AU2015210222B2
AU2015210222B2 AU2015210222A AU2015210222A AU2015210222B2 AU 2015210222 B2 AU2015210222 B2 AU 2015210222B2 AU 2015210222 A AU2015210222 A AU 2015210222A AU 2015210222 A AU2015210222 A AU 2015210222A AU 2015210222 B2 AU2015210222 B2 AU 2015210222B2
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AU
Australia
Prior art keywords
packing material
liquid
gas
material layer
absorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU2015210222A
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English (en)
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AU2015210222A1 (en
Inventor
Takuya Hirata
Yoshinori Kajiya
Hiromitsu Nagayasu
Tsuyoshi Oishi
Hiroshi Tanaka
Atsuhiro Yukumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of AU2015210222A1 publication Critical patent/AU2015210222A1/en
Application granted granted Critical
Publication of AU2015210222B2 publication Critical patent/AU2015210222B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B01D53/14Separation 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
    • B01D53/1425Regeneration of liquid absorbents
    • 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
    • B01D53/14Separation 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
    • B01D53/1456Removing acid components
    • B01D53/1475Removing carbon dioxide
    • 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
    • B01D53/14Separation 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
    • B01D53/1493Selection of liquid materials for use as absorbents
    • 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
    • B01D53/14Separation 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
    • B01D53/18Absorbing units; Liquid distributors therefor
    • B01D53/185Liquid distributors
    • 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
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/32Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/50Carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2252/00Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20Organic absorbents
    • B01D2252/204Amines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/50Carbon oxides
    • B01D2257/504Carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32206Flat sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/3221Corrugated sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32213Plurality of essentially parallel sheets
    • B01J2219/32217Plurality of essentially parallel sheets with sheets having corrugations which intersect at an angle of 90 degrees
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32213Plurality of essentially parallel sheets
    • B01J2219/3222Plurality of essentially parallel sheets with sheets having corrugations which intersect at an angle different from 90 degrees
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32224Sheets characterised by the orientation of the sheet
    • B01J2219/32227Vertical orientation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32224Sheets characterised by the orientation of the sheet
    • B01J2219/32234Inclined orientation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32265Sheets characterised by the orientation of blocks of sheets
    • B01J2219/32268Sheets characterised by the orientation of blocks of sheets relating to blocks in the same horizontal level
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322Basic shape of the elements
    • B01J2219/32203Sheets
    • B01J2219/32265Sheets characterised by the orientation of blocks of sheets
    • B01J2219/32272Sheets characterised by the orientation of blocks of sheets relating to blocks in superimposed layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/332Details relating to the flow of the phases
    • B01J2219/3325Counter-current flow
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Carbon And Carbon Compounds (AREA)
AU2015210222A 2014-01-27 2015-01-13 Gas-liquid contactor and CO2 recovery device Ceased AU2015210222B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2014-012720 2014-01-27
JP2014012720A JP6460629B2 (ja) 2014-01-27 2014-01-27 気液接触装置及びco2回収装置
PCT/JP2015/050662 WO2015111463A1 (ja) 2014-01-27 2015-01-13 気液接触装置及びco2回収装置

Publications (2)

Publication Number Publication Date
AU2015210222A1 AU2015210222A1 (en) 2016-06-23
AU2015210222B2 true AU2015210222B2 (en) 2017-07-13

Family

ID=53681271

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2015210222A Ceased AU2015210222B2 (en) 2014-01-27 2015-01-13 Gas-liquid contactor and CO2 recovery device

Country Status (6)

Country Link
US (1) US9919267B2 (https=)
EP (1) EP3067114A4 (https=)
JP (1) JP6460629B2 (https=)
AU (1) AU2015210222B2 (https=)
CA (1) CA2932711A1 (https=)
WO (1) WO2015111463A1 (https=)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106000008B (zh) * 2016-07-11 2019-03-15 南通星球石墨设备有限公司 一种急冷式吸收塔
US11446603B2 (en) * 2017-07-06 2022-09-20 Qatar Foundation For Education, Science, Andcommunity Development Acid gas removal system for removing acidic gases from gaseous hydrocarbons
EP3424590A1 (de) * 2017-07-07 2019-01-09 Linde Aktiengesellschaft Packung zum stoff- und/oder energieaustausch mit getrennten packungseinheiten
CN108187999A (zh) * 2017-12-28 2018-06-22 郑州天舜电子技术有限公司 一种高效的化工生产物料筛选设备
JP7412102B2 (ja) * 2019-07-24 2024-01-12 三菱重工業株式会社 ガスタービンプラント
CN116159433B (zh) * 2023-03-06 2024-10-18 清华大学 一种烟气湿法脱硫浆液制备so2的方法
US12017179B1 (en) 2023-08-15 2024-06-25 AirMyne, Inc. Interfacial surface structures for carbon dioxide removal systems
WO2025137177A1 (en) * 2023-12-18 2025-06-26 Intrnls, Inc High surface-area contactor media for improved gas-liquid contactors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012232292A (ja) * 2011-04-18 2012-11-29 Ihi Corp 吸収塔及びそれを用いた生物脱臭装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541358B2 (https=) 1973-04-11 1980-10-23
JPS5095439U (https=) 1973-12-29 1975-08-09
JPS51126970A (en) 1975-04-30 1976-11-05 Gadelius Kk A packing for vapor-liquid contact tow towers
BE829952A (nl) 1975-06-06 1975-10-01 Volelementen voor apparaten bestemd om gassen en vloeistoffen met elk aar in kontakt te brengen
JPS5326352U (https=) * 1976-08-13 1978-03-06
JPS5624029A (en) 1979-08-06 1981-03-07 Kureha Chem Ind Co Ltd Removal of sulfur dioxide gas in exhaust gas
DE3266166D1 (en) 1981-07-08 1985-10-17 Kuehni Ag Packing for material exchange columns, and process for producing the packing
CH658198A5 (de) * 1983-01-04 1986-10-31 Sulzer Ag Fluessigkeitsverteiler in einer stoff- und waermeaustauschkolonne.
CA1226118A (en) * 1983-06-21 1987-09-01 Gilbert Chen Metal packing and method of manufacture
JPH086499Y2 (ja) * 1990-09-25 1996-02-28 日鉄化工機株式会社 液分散器
JPH07121357B2 (ja) * 1991-08-20 1995-12-25 日本ポリエステル株式会社 気液接触ユニットおよび気液接触装置
JPH06269629A (ja) 1993-03-19 1994-09-27 Kansai Electric Power Co Inc:The 気液接触装置
US5486318A (en) 1994-12-29 1996-01-23 The Boc Group, Inc. Liquid-vapor contact column
DE59510174D1 (de) * 1995-11-29 2002-05-23 Sulzer Chemtech Ag Winterthur Packung für eine Gegenstrom-Hochdruckkolonne
SE512546C2 (sv) 1998-07-02 2000-04-03 Flaekt Ab Vätskefördelning i en kontaktapparat
PE20071048A1 (es) 2005-12-12 2007-10-18 Basf Ag Proceso para la recuperacion de dioxido de carbono
FR2907025B1 (fr) * 2006-10-11 2009-05-08 Inst Francais Du Petrole Procede de capture du co2 avec integration thermique du regenerateur.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012232292A (ja) * 2011-04-18 2012-11-29 Ihi Corp 吸収塔及びそれを用いた生物脱臭装置

Also Published As

Publication number Publication date
EP3067114A1 (en) 2016-09-14
US9919267B2 (en) 2018-03-20
EP3067114A4 (en) 2017-02-08
CA2932711A1 (en) 2015-07-30
JP2015139727A (ja) 2015-08-03
WO2015111463A1 (ja) 2015-07-30
JP6460629B2 (ja) 2019-01-30
US20160310894A1 (en) 2016-10-27
AU2015210222A1 (en) 2016-06-23

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