DK1294473T3 - Apparat og fremgangsmåde til blanding af væsker - Google Patents

Apparat og fremgangsmåde til blanding af væsker

Info

Publication number
DK1294473T3
DK1294473T3 DK01947618T DK01947618T DK1294473T3 DK 1294473 T3 DK1294473 T3 DK 1294473T3 DK 01947618 T DK01947618 T DK 01947618T DK 01947618 T DK01947618 T DK 01947618T DK 1294473 T3 DK1294473 T3 DK 1294473T3
Authority
DK
Denmark
Prior art keywords
pipe
liquid
gas
gas stream
mixing liquids
Prior art date
Application number
DK01947618T
Other languages
Danish (da)
English (en)
Inventor
Finn Patrick Nilsen
Harald Linga
Rune Fantoft
Inge Sverre Lund Nilsen
Geir Inge Eide
Original Assignee
Statoil Asa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Statoil Asa filed Critical Statoil Asa
Application granted granted Critical
Publication of DK1294473T3 publication Critical patent/DK1294473T3/da

Links

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
    • B01D53/14Separation 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
    • 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
    • B01D53/1462Removing mixtures of hydrogen sulfide and carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20Mixing gases with liquids
    • B01F23/21Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30Injector mixers
    • B01F25/31Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30Injector mixers
    • B01F25/31Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30Injector mixers
    • B01F25/31Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30Injector mixers
    • B01F25/31Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31423Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference
    • B01F25/314231Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference the perforations being a complete cut-out in the circumferential direction covering the whole diameter of the tube, i.e. having two consecutive tubes placed consecutively, the additional component being introduced between them

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Accessories For Mixers (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
DK01947618T 2000-06-29 2001-06-29 Apparat og fremgangsmåde til blanding af væsker DK1294473T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0015997.0A GB0015997D0 (en) 2000-06-29 2000-06-29 Method for mixing fluids

Publications (1)

Publication Number Publication Date
DK1294473T3 true DK1294473T3 (da) 2006-06-12

Family

ID=9894690

Family Applications (1)

Application Number Title Priority Date Filing Date
DK01947618T DK1294473T3 (da) 2000-06-29 2001-06-29 Apparat og fremgangsmåde til blanding af væsker

Country Status (15)

Country Link
US (1) US7128276B2 (zh)
EP (1) EP1294473B1 (zh)
CN (1) CN1302838C (zh)
AT (1) ATE317722T1 (zh)
AU (2) AU2001269265B2 (zh)
BR (1) BR0112060B1 (zh)
CA (1) CA2411417C (zh)
DE (1) DE60117265T2 (zh)
DK (1) DK1294473T3 (zh)
ES (1) ES2258538T3 (zh)
GB (1) GB0015997D0 (zh)
NO (1) NO327793B1 (zh)
RU (1) RU2247595C2 (zh)
WO (1) WO2002000334A1 (zh)
ZA (1) ZA200209844B (zh)

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO343579B1 (no) * 2004-10-01 2019-04-08 Propure As Injeksjonsblander
JP4913058B2 (ja) * 2004-10-01 2012-04-11 プロピュア・アクティーゼルスカブ マルチ流体インジェクションミキサー
NO20044181L (no) * 2004-10-01 2006-04-03 Propure As Injection mixer
US20090038701A1 (en) 2006-01-17 2009-02-12 Baxter International Inc. Device, system and method for mixing
RU2392061C2 (ru) * 2007-09-19 2010-06-20 Сергей Викторович Надмитов Способ селективно-рециркуляционного распыления жидкости и устройство для его осуществления (варианты)
KR101506654B1 (ko) * 2007-12-20 2015-03-27 레이브 엔.피., 인크. 노즐용 유체 분사 조립체
US20090261021A1 (en) * 2008-04-16 2009-10-22 Bower David J Oil sands processing
MX2011002194A (es) * 2008-10-14 2011-03-29 Exxonmobil Upstream Res Co Remocion de gases acidos de una corriente de gas.
MY155414A (en) 2009-04-20 2015-10-15 Exxonmobil Upstream Res Co Cryogenic system for removing acid gases from a hydrocarbon gas stream, and method of removing acid gases
FR2947185B1 (fr) 2009-06-26 2011-07-01 Total Sa Procede de traitement de gaz acides
WO2011046658A1 (en) 2009-09-09 2011-04-21 Exxonmobil Upstream Research Company Cryogenic system for removing acid gasses from a hydrocarbon gas stream
EA201270439A1 (ru) * 2009-09-18 2012-09-28 Флуор Текнолоджиз Корпорейшн Устройства и способы для отделения coпри высоком давлении и высоком содержании
CN102597671B (zh) * 2009-11-02 2015-11-25 埃克森美孚上游研究公司 从烃气流中去除酸性气体以及去除硫化氢的低温系统
SG182308A1 (en) 2010-01-22 2012-08-30 Exxonmobil Upstream Res Co Removal of acid gases from a gas stream, with co2 capture and sequestration
US20110217218A1 (en) * 2010-03-02 2011-09-08 Exxonmobil Research And Engineering Company Systems and Methods for Acid Gas Removal
US8336319B2 (en) * 2010-06-04 2012-12-25 Tesla Motors, Inc. Thermal management system with dual mode coolant loops
EA021899B1 (ru) 2010-07-30 2015-09-30 Эксонмобил Апстрим Рисерч Компани Криогенная система для удаления кислых газов из потока газообразного углеводорода с использованием разделительных устройств с параллельным потоком
US8899557B2 (en) 2011-03-16 2014-12-02 Exxonmobil Upstream Research Company In-line device for gas-liquid contacting, and gas processing facility employing co-current contactors
FR2977168B1 (fr) * 2011-06-29 2015-07-24 IFP Energies Nouvelles Procede de desacidification d'un gaz avec plusieurs etapes de mise en contact a co-courant avec une solution absorbante
US20190277416A1 (en) * 2012-02-20 2019-09-12 Nyloncraft Incorporated High mass flow check valve aspirator
AU2013235610B2 (en) 2012-03-21 2015-11-19 Exxonmobil Upstream Research Company Separating carbon dioxide and ethane from a mixed stream
DE102012209342A1 (de) * 2012-06-04 2013-12-05 Siemens Aktiengesellschaft Verfahren zum Anpassen der Geometrie einer Dispergierdüse
MX368367B (es) 2013-01-25 2019-09-30 Exxonmobil Upstream Res Co Contacto de una corriente de gas con una corriente de liquido.
FI20135295L (fi) * 2013-03-26 2014-09-27 Aalto Korkeakoulusäätiö SCR-järjestelmä dieselmoottoreiden pakokaasujen jälkikäsittelyä varten sekä vastaava SCR-tekniikkaa hyödyntävä menetelmä
AR096132A1 (es) 2013-05-09 2015-12-09 Exxonmobil Upstream Res Co Separar dióxido de carbono y sulfuro de hidrógeno de un flujo de gas natural con sistemas de co-corriente en contacto
AR096078A1 (es) * 2013-05-09 2015-12-02 Exxonmobil Upstream Res Co Separación de impurezas de una corriente de gas usando un sistema de contacto en equicorriente orientado verticalmente
CN105723171B (zh) 2013-12-06 2018-06-05 埃克森美孚上游研究公司 采用加热设施使固体粘合不稳定和/或防止固体粘合的分离烃和污染物的方法和装置
CA2924695C (en) 2013-12-06 2018-10-02 Exxonmobil Upstream Research Company Method and system for separating a feed stream with a feed stream distribution mechanism
US9874395B2 (en) 2013-12-06 2018-01-23 Exxonmobil Upstream Research Company Method and system for preventing accumulation of solids in a distillation tower
CA2925404C (en) 2013-12-06 2018-02-06 Exxonmobil Upstream Research Company Method and system of dehydrating a feed stream processed in a distillation tower
US9823016B2 (en) 2013-12-06 2017-11-21 Exxonmobil Upstream Research Company Method and system of modifying a liquid level during start-up operations
US9869511B2 (en) 2013-12-06 2018-01-16 Exxonmobil Upstream Research Company Method and device for separating hydrocarbons and contaminants with a spray assembly
CA2924402C (en) 2013-12-06 2017-11-21 Exxonmobil Upstream Research Company Method and device for separating a feed stream using radiation detectors
US9562719B2 (en) 2013-12-06 2017-02-07 Exxonmobil Upstream Research Company Method of removing solids by modifying a liquid level in a distillation tower
WO2015084495A2 (en) 2013-12-06 2015-06-11 Exxonmobil Upstream Research Company Method and system of maintaining a liquid level in a distillation tower
AU2015375479B2 (en) 2015-01-09 2018-12-06 Exxonmobil Upstream Research Company Separating impurities from a fluid steam using multiple co-current contactors
EP3259045A1 (en) 2015-02-17 2017-12-27 Exxonmobil Upstream Research Company Inner surface features for co-current contactors
CA2972796C (en) 2015-02-27 2019-08-13 Exxonmobil Upstream Research Company Reducing refrigeration and dehydration load for a feed stream entering a cryogenic distillation process
KR101992109B1 (ko) 2015-03-13 2019-06-25 엑손모빌 업스트림 리서치 캄파니 병류 접촉기용 코어레서
US9630125B2 (en) * 2015-06-08 2017-04-25 Shimadzu Corporation Gas-blowing liquid sample infusing device and infusion container used for the same
CA2994812C (en) 2015-09-18 2020-03-10 Exxonmobil Upstream Research Company Heating component to reduce solidification in a cryogenic distillation system
WO2017052922A2 (en) 2015-09-24 2017-03-30 Exxonmobil Upstream Research Company Treatment plant for hydrocarbon gas having variable contaminant levels
WO2017143215A1 (en) * 2016-02-19 2017-08-24 Exxonmobil Upstream Reasrch Company Cold solvent gas treating system for selective h2s removal
WO2017172321A1 (en) 2016-03-30 2017-10-05 Exxonmobil Upstream Research Company Self-sourced reservoir fluid for enhanced oil recovery
RU2644604C1 (ru) * 2016-10-31 2018-02-13 Марат Минасхатович Ризванов Сопло для создания реактивной газовой и жидкостной струи для сместителей
AU2018286407B2 (en) 2017-06-15 2021-07-01 Exxonmobil Upstream Research Company Fractionation system using compact co-current contacting systems
AU2018283902B9 (en) 2017-06-15 2021-08-05 Exxonmobil Upstream Research Company Fractionation system using bundler compact co-current contacting systems
US10876052B2 (en) 2017-06-20 2020-12-29 Exxonmobil Upstream Research Company Compact contacting systems and methods for scavenging sulfur-containing compounds
EP3672711B1 (en) 2017-08-21 2021-09-22 ExxonMobil Upstream Research Company Integration of cold solvent and acid gas removal
IL255268B (en) * 2017-10-26 2019-01-31 Izun Pharmaceuticals Corp Smoke capture system and method
PL3765801T3 (pl) * 2018-03-13 2022-04-04 Thorsteinn I. VIGLUNDSSON Sposób i urządzenie do wytwarzania mokrego śniegu
WO2020005553A1 (en) 2018-06-29 2020-01-02 Exxonmobil Upstream Research Company (Emhc-N1.4A.607) Mixing and heat integration of melt tray liquids in a cryogenic distillation tower
US11306267B2 (en) 2018-06-29 2022-04-19 Exxonmobil Upstream Research Company Hybrid tray for introducing a low CO2 feed stream into a distillation tower
CN109201364B (zh) * 2018-09-13 2020-10-27 宁波工程学院 一种提高喷涂均匀性的喷涂装置
US11833481B2 (en) 2018-10-05 2023-12-05 Produced Water Absorbents Inc. Multi-channel, variable-flow mixers and related methods
US11673104B2 (en) * 2018-12-07 2023-06-13 Produced Water Absorbents Inc. Multi-fluid injection mixer and related methods
US11331636B2 (en) 2020-07-29 2022-05-17 Saudi Arabian Oil Company Multi-opening chemical injection device
US11813580B2 (en) * 2020-09-02 2023-11-14 Nov Canada Ulc Static mixer suitable for additive manufacturing
CN112944213A (zh) * 2021-03-17 2021-06-11 重庆渝微电子技术研究院有限公司 一种动态气液配气系统及方法
CN112933866B (zh) * 2021-03-22 2022-07-22 哈尔滨工程大学 一种可用于有害气体净化处理的气液两相引射器

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB769821A (en) 1954-06-05 1957-03-13 Svenska Flaektfabriken Ab Method and device for supplying, spraying and mixing a liquid in a gaseous medium flowing in a channel
NL132863C (zh) 1968-07-26
US4019983A (en) * 1974-10-10 1977-04-26 Houdaille Industries, Inc. Disinfection system and method
DE2634496C2 (de) * 1976-07-31 1985-10-17 Bayer Ag, 5090 Leverkusen Injektor zur Begasung einer Flüssigkeit
US4405563A (en) * 1980-11-26 1983-09-20 Irwin Fox Scavenging natural gas streams with slurry apparatus
JPS5887102A (ja) * 1981-11-19 1983-05-24 Kanegafuchi Chem Ind Co Ltd 凝固ラテツクスの製造方法および装置
DE3325741C1 (de) 1983-07-16 1985-02-21 Lechler Gmbh & Co Kg, 7012 Fellbach Zylindrischer Einsatz fuer eine Zweistoff-Zerstaeubungsduese
US4668498A (en) * 1985-09-27 1987-05-26 Davis James A Supersonic singlet delta oxygen aerosol generator
JPS6388026A (ja) 1986-10-01 1988-04-19 Mitsubishi Rayon Eng Co Ltd 気液混合装置
SU1457971A1 (ru) 1987-07-09 1989-02-15 Производственно-Техническое Предприятие Треста "Укрэнергочермет" Устройство дл очистки отход щих газов
US4932213A (en) * 1989-02-10 1990-06-12 Amoco Corporation Method of treating natural gas to remove ethane and higher hydrocarbons
US5273734A (en) * 1990-01-12 1993-12-28 The Texas A&M University System Conversion of H2 to sulfur
JPH0448920A (ja) * 1990-06-18 1992-02-18 Inax Corp エゼクタ及び浄化装置
US5090619A (en) * 1990-08-29 1992-02-25 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
US5238665A (en) * 1991-06-10 1993-08-24 Beco Engineering Company Method for minimizing environmental release of toxic compounds in the incineration of wastes
DE9202828U1 (zh) 1992-03-04 1992-07-09 Wopfner, Gaston M., 8190 Wolfratshausen, De
GB9405000D0 (en) * 1994-03-15 1994-04-27 Boc Group Plc Gas dissolving
DE4446000C2 (de) 1994-12-22 1997-11-20 Hrch Huppmann Maschf Gmbh Vorrichtung zum Mischen zweier strömender Fluide, insbesondere zum Belüften von Würze für die Bierherstellung
EP1021237A1 (en) * 1997-09-15 2000-07-26 Den Norske Stats Oljeselskap A.S. Fluid separation system
RU2123617C1 (ru) * 1997-12-04 1998-12-20 Попов Сергей Анатольевич Жидкостно-газовый струйный аппарат
JPH11276836A (ja) * 1998-03-31 1999-10-12 Chiyoda Engineering Kk 湿式集塵装置
FR2801648B1 (fr) * 1999-11-30 2002-06-21 Commissariat Energie Atomique Injecteur a vapeur haute pression comportant un drain axial

Also Published As

Publication number Publication date
NO20026200L (no) 2002-12-23
DE60117265D1 (de) 2006-04-20
EP1294473B1 (en) 2006-02-15
CA2411417A1 (en) 2002-01-03
GB0015997D0 (en) 2000-08-23
WO2002000334A1 (en) 2002-01-03
BR0112060A (pt) 2003-06-17
CA2411417C (en) 2010-09-07
EP1294473A1 (en) 2003-03-26
NO20026200D0 (no) 2002-12-23
ES2258538T3 (es) 2006-09-01
DE60117265T2 (de) 2006-11-23
ZA200209844B (en) 2003-12-04
ATE317722T1 (de) 2006-03-15
US7128276B2 (en) 2006-10-31
CN1302838C (zh) 2007-03-07
NO327793B1 (no) 2009-09-28
RU2247595C2 (ru) 2005-03-10
AU2001269265B2 (en) 2005-11-17
BR0112060B1 (pt) 2010-05-18
US20030155436A1 (en) 2003-08-21
AU6926501A (en) 2002-01-08
CN1438916A (zh) 2003-08-27

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