KR860001331A - 고순도 질소가스 제조장치 - Google Patents

고순도 질소가스 제조장치 Download PDF

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Publication number
KR860001331A
KR860001331A KR1019850004784A KR850004784A KR860001331A KR 860001331 A KR860001331 A KR 860001331A KR 1019850004784 A KR1019850004784 A KR 1019850004784A KR 850004784 A KR850004784 A KR 850004784A KR 860001331 A KR860001331 A KR 860001331A
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condenser
liquid
nitrogen
compressed air
nitrogen gas
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KR1019850004784A
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KR900005985B1 (ko
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아끼라 요시노
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아오끼 히로시
다이또오 산소가부시끼 가이샤
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Application filed by 아오끼 히로시, 다이또오 산소가부시끼 가이샤 filed Critical 아오끼 히로시
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • F25J3/0426—The cryogenic component does not participate in the fractionation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04824—Stopping of the process, e.g. defrosting or deriming; Back-up procedures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/912—External refrigeration system
    • Y10S62/913—Liquified gas

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

내용 없음

Description

고순도 질소가스 제조장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 본 발명의 한 실시예의 구성도.
제2도 그 변형에의 구성도.
제3도 다른 실시예의 구성도.
*도면의 주요부분에 대한 부호의 설명
(9)공기 압축기, (11)(12) 흡착통, (13)(14) 열교환기, (15) 질소 정류탑, (17) 파이프, (18) 액체 공기, (21) 분축기부(分縮器部), (21a) 응축기, (21b) 액체질소 저장고, (22) 탐부, (23) 액체질소 저장조, (24a)유입 파이프, (27) 꺼내는 파이프, (18) 메인 파이프

Claims (1)

  1. 외부로부터 거두어 들어진 공기를 압축하는 공기 압축수단과, 이 공기 압축 수단에 의해서 압축된 압축 공기중의 탄산가스와 물을 제거하는 제거수단과, 이 제거수단을 거친 압축공기를 초저온으로 냉각하는 열교환수단과, 이 열교환 수단에 의하여 초저온으로 냉각된 압축공기의 일부를 액화하여 내부에 모우고 질소만을 기체로서 간직하는 정류탑과, 액체질소를 저장하는 액체질소 저장수단과, 이 액체질소저장수단내의 액체질소를 압축공기액화용의 한냉원으로서 전술한 정류탑으로 유도하는 도입로와, 전술한 정류탑내에 간직되어 있는 기화질소를 꺼내는 질소가스를 꺼내는 통로를 갖추고, 전술한 정류탑이 환류액 제조용의응축기를 내장하는 분축기부와 압축공기를 액화 분리하는 탑부로되었으며, 그 분축기부가 팽창밸브가 부착된 액체공기 취입용 파이프를 끼워서 전술한 탑부의 바닥과 연통(連通)되어 있는 동시에 그 분축기부내의 응축기의 입구 및 출구가 제1, 제2의 환류액용 파이프를 통해서 전술한 탑부의 상부에 연통되고, 전술한 탑부가 그 하부에서 전술한 염교환 수단에 접속되고, 상부에서 전술한 유입로 및 질소가스를 배출로에 접속되어 있는 것을 특징으로 하는 고순도질소 가스 제조장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850004784A 1984-07-13 1985-07-04 고순도 질소가스 제조 장치 Expired KR900005985B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14633284A JPS6124968A (ja) 1984-07-13 1984-07-13 高純度窒素ガス製造装置
JP59-146332 1984-07-13

Publications (2)

Publication Number Publication Date
KR860001331A true KR860001331A (ko) 1986-02-24
KR900005985B1 KR900005985B1 (ko) 1990-08-18

Family

ID=15405289

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850004784A Expired KR900005985B1 (ko) 1984-07-13 1985-07-04 고순도 질소가스 제조 장치

Country Status (7)

Country Link
US (1) US4698079A (ko)
EP (1) EP0191862B1 (ko)
JP (1) JPS6124968A (ko)
KR (1) KR900005985B1 (ko)
CN (1) CN1018857B (ko)
DE (1) DE3566833D1 (ko)
WO (1) WO1986000694A1 (ko)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834785A (en) * 1988-06-20 1989-05-30 Air Products And Chemicals, Inc. Cryogenic nitrogen generator with nitrogen expander
US5058387A (en) * 1989-07-05 1991-10-22 The Boc Group, Inc. Process to ultrapurify liquid nitrogen imported as back-up for nitrogen generating plants
FR2660741A1 (fr) * 1990-04-10 1991-10-11 Air Liquide Procede et installation de production d'azote gazeux, et systeme de fourniture d'azote correspondant.
FR2670278B1 (fr) * 1990-12-06 1993-01-22 Air Liquide Procede et installation de distillation d'air en regime variable de production d'oxygene gazeux.
US5144808A (en) * 1991-02-12 1992-09-08 Liquid Air Engineering Corporation Cryogenic air separation process and apparatus
CN1071444C (zh) * 1992-02-21 2001-09-19 普拉塞尔技术有限公司 生产气体氧的低温空气分离系统
FR2697620B1 (fr) * 1992-10-30 1994-12-23 Air Liquide Procédé et installation de production d'azote gazeux à débit variable.
JP3447437B2 (ja) * 1995-07-26 2003-09-16 日本エア・リキード株式会社 高純度窒素ガス製造装置
US5740683A (en) * 1997-03-27 1998-04-21 Praxair Technology, Inc. Cryogenic rectification regenerator system
US5996373A (en) * 1998-02-04 1999-12-07 L'air Liquide, Societe Ananyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic air separation process and apparatus
US5906113A (en) * 1998-04-08 1999-05-25 Praxair Technology, Inc. Serial column cryogenic rectification system for producing high purity nitrogen
US7409835B2 (en) * 2004-07-14 2008-08-12 Air Liquide Process & Construction, Inc. Backup system and method for production of pressurized gas
US7210312B2 (en) * 2004-08-03 2007-05-01 Sunpower, Inc. Energy efficient, inexpensive extraction of oxygen from ambient air for portable and home use
KR100614199B1 (ko) * 2005-05-18 2006-08-22 (주)레베산업 선박용 질소가스공급장치
FR2903483B1 (fr) * 2006-07-04 2014-07-04 Air Liquide Procede et appareil de separation d'air par distillation cryogenique
FR2920866A1 (fr) * 2007-09-12 2009-03-13 Air Liquide Ligne d'echange principale et appareil de separation d'air par distillation cryogenique incorporant une telle ligne d'echange
CN100581996C (zh) * 2008-10-10 2010-01-20 上海启元空分技术发展有限公司 空气分离制取压力氮气的装置及方法
CN103041673B (zh) * 2011-10-13 2014-12-10 周登荣 高压空气的分离方法和系统
CN103123203B (zh) * 2013-02-22 2015-03-04 河南开元空分集团有限公司 利用含氮废气进行再低温精馏制取纯氮的方法
CN105758117A (zh) * 2014-12-19 2016-07-13 常熟市永安工业气体制造有限公司 纯液氮制备方法
CN104534812B (zh) * 2015-01-04 2016-10-19 中煤能源黑龙江煤化工有限公司 一种应用于气体深冷分离设备主精馏塔
CN119755915B (zh) * 2025-03-10 2025-05-02 安徽万瑞冷电科技有限公司 一种分体式氮气液化装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067046B (de) * 1956-01-04 1959-10-15 Union Carbide Corporation, New York, N. Y. (V. St. A.) Verfahren zum Zerlegen eines Gasgemisches bei niedriger Temperatur und Vorrichtunig zur Durchführung des Verfahrens
US3062016A (en) * 1957-12-31 1962-11-06 Air Reduction Maintaining high purity argon atmosphere
US3363427A (en) * 1964-06-02 1968-01-16 Air Reduction Production of ultrahigh purity oxygen with removal of hydrocarbon impurities
GB1135871A (en) * 1965-06-29 1968-12-04 Air Prod & Chem Liquefaction of natural gas
JPS4940071A (ko) * 1972-08-17 1974-04-15
GB1463075A (en) * 1973-04-13 1977-02-02 Cryoplants Ltd Air separation
DE2542468A1 (de) * 1975-09-24 1977-04-07 Bayer Ag Herbizides mittel
JPS5814628B2 (ja) * 1975-09-30 1983-03-19 横河電機株式会社 リレ−ノ シヤダンジカンソクテイソウチ
JPS5514351A (en) * 1978-07-14 1980-01-31 Aisin Warner Ltd Controller of automatic change gear
JPS5579972A (en) * 1978-12-11 1980-06-16 Hitachi Ltd Operation control of nitrogen production system
JPS5864478A (ja) * 1981-10-15 1983-04-16 日本酸素株式会社 高純度窒素製造装置
JPS5944569A (ja) * 1982-09-03 1984-03-13 株式会社日立製作所 窒素製造装置の運転方法
GB2129115B (en) * 1982-10-27 1986-03-12 Air Prod & Chem Producing gaseous nitrogen
EP0144430B1 (en) * 1983-03-08 1989-01-11 Daidousanso Co., Ltd. Apparatus for producing high-purity nitrogen gas
US4526425A (en) * 1983-04-04 1985-07-02 J. I. Case Company Dual wheel mounting arrangement

Also Published As

Publication number Publication date
DE3566833D1 (en) 1989-01-19
EP0191862A1 (en) 1986-08-27
JPS6124968A (ja) 1986-02-03
KR900005985B1 (ko) 1990-08-18
JPS6146747B2 (ko) 1986-10-15
EP0191862B1 (en) 1988-12-14
US4698079A (en) 1987-10-06
EP0191862A4 (en) 1986-11-25
CN1018857B (zh) 1992-10-28
CN1044850A (zh) 1990-08-22
WO1986000694A1 (fr) 1986-01-30

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Patent event code: PA01091R01D

Comment text: Patent Application

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