KR860004294A - 보조 리보일러를 추진력으로 하는 혼성 질소 발생기 - Google Patents

보조 리보일러를 추진력으로 하는 혼성 질소 발생기 Download PDF

Info

Publication number
KR860004294A
KR860004294A KR1019850008512A KR850008512A KR860004294A KR 860004294 A KR860004294 A KR 860004294A KR 1019850008512 A KR1019850008512 A KR 1019850008512A KR 850008512 A KR850008512 A KR 850008512A KR 860004294 A KR860004294 A KR 860004294A
Authority
KR
South Korea
Prior art keywords
column
condensed
supply air
nitrogen
rich
Prior art date
Application number
KR1019850008512A
Other languages
English (en)
Other versions
KR900007208B1 (ko
Inventor
해리충
Original Assignee
에드워드 지. 그리어
유니온 카바이드 코포레이션
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24696498&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR860004294(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 에드워드 지. 그리어, 유니온 카바이드 코포레이션 filed Critical 에드워드 지. 그리어
Publication of KR860004294A publication Critical patent/KR860004294A/ko
Application granted granted Critical
Publication of KR900007208B1 publication Critical patent/KR900007208B1/ko

Links

Classifications

    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest pressure column
    • 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
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • 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
    • F25J2200/72—Refluxing the column with at least a part of the totally 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/10—Mathematical formulae, modeling, plot or curves; Design methods

Landscapes

  • 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

내용없음

Description

보조 리보일러를 추진력으로 하는 혼성 질소 발생기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명 공정의 적합한 구체형의 필수적 요소를 보여주는 공기분리공정의 간단한이형(version)의 개략적 표현.
제2도는 본 발명 공정의 적합한 구체형을 이용하는 공기분리공정의 개략적 표현.
제4도는 본 발명의 공정을 위한 표본 멕카베 티엘레선도.
*도면의 주요부호 설명
1 : 압축기, 2 : 압축공기흐름, 3 : 열교환기, 4 : 공기분리공정으로부터의 귀환흐름, 5 : 냉각된공급공기, 6 : 주요부분, 7 : 보조부분, 8: 터어보팽창기(turboexpander), 9: 컬럼(column), 10 : 응축기, 11 : 얻어지는 응축된 보조부분, 12 : 밸브, 13,14,15 : 트레이(tray), 16 :(19)의 흐름, 17 : 밸브, 18 : 응축기, 19 :산소가 풍부한 증기의 제1부분, 20 : 응축된 제1의 질소가 풍부한 증기부분, 21 : 흐름(20)의 일부분, 22 : 질소가 풍부한 증기의제2부분, 23 : 인출흐름, 25 : 유출(outgoing)흐름, 27 : 보조부분의 작은일부분, 26 : 흐름, 28 : 부분(6)의 부흐름, 30 : 열교환기, 41 : 컬럼내로의 도입흐름 42 : 도입흐름, 43 : 배출흐름, 44 : 생산물질소의 회수흐름, 45 : 액체공기, A : 점의궤적, B : 평형선(equilibrium line), C : 조작선, D : 조작선의 분, E : 조작선의 분

Claims (13)

  1. (1) 35내지 145psia사이의 압력에서 조작되는 정류컬럼내로 주요부분의 공급공기를 도입하여 그것을 질소가 풍부한 증기와 산소가 짙은 약체로 분리시키며, (2) 컬럼이 조작되는 압력보다 큰압력으로 산소가 짙은 약체와의 간접열교환에 의해 보조부분의 공급 공기를 응축하며, (3) 얻어지는 응축된 보조부분의 공급공기를 주요부분의 공급공기가 컬럼내로 도입되는 지점의 상부에 있는 적어도 하나의 트레이를 향햐 컬럼내로 도입하며, (4) 제1부분의 질소가 풍부한 증기를 기화하는 산소가 짙은 약체와의 간접 열교환으로 응축하며, (5) 보조부분의 공급공기가 컬럼내로 도입되는 지점의 상부에 있는 적어도 하나의 트레이를 향해, 적어도 소량의 얻어지는 응축된 질소가 풍부한 부분이 컬럼을 지나게 하며, 그리고 (6) 실질적으로 전체의 나머지 제2부분의 질소가 풍부한 증기를 생성물질소로 회수하는 단계를 포함하는 것을 특징으로 하는 공급공기의 저온 정류에 의한 베교적 높은 수율 및 순도에서 질소의 생산공정.
  2. 제1항에 있어서, 주요부분은 공급공기의 약55내지 90%를 포함하고 보조부분은 공급 공기의 약10내지 45%를 포함하는 것을 특징으로 하는 공정.
  3. 제1항에 있어서, 주요부분은 공급공기의 약 60내지 90%를 포함하고 보조부분은 공급공기의 약10내지 40%를 포함하는 것을 특징으로 하는 공정.
  4. 제1항에 있어서, 보조부분은 단계(2)의 응축하는 동안에, 정류컬럼이 조작되는 압력보다 큰 10내지 90psi사이에 있는 것을 특징으로하는 공정.
  5. 제1항에 있어서, 모든 응축된 질소가 풍부한 제1부분이 컬럼을 통과하는 것을 특징으로 하는 공정.
  6. 제1항에 있어서, 소량의 응축된 질소가 풍부한 제1부분이 생산물 액체질소로 회수되는 것을 특징으로 하는 공정.
  7. 제1항에 있어서, 전체의 공급공기는 컬럼의 조작압력보다 큰 압력까지 압축되고 주요부분의 공급공기는 컬럼내로 그것이 도입되기이전에 조작압력까지 팽창하는 것을 특징으로 하는 공정.
  8. 제7항에 있어서, 공급공기의 팽창이 공정을 위한 냉동을 발생시키는 것을 특징으로 하는 공정.
  9. 제1항에 있어서, 단지 보조부분의 공급공기만이 컬럼의 조작압력보다 큰 압력까지 압축되는 것을 특징으로 하는 공정.
  10. 제1항에 있어서, 제3부분의 공급공기가 적어도 하나의 귀환흐름과의 간접열교환에 의해
    응축되고 얻어지는 응축된 제3부분은 주요부분의 공급공기가 컬럼내로 도입되는 지점의 상부에 있는 적어도 하나의 트레이를 향해 컬럼내로 도입되는 것을 특징으로 하는 공정.
  11. 제10항에 있어서, 응축된 제3부분은 응축된 보조부분과 결합하고 결합한 흐름은 컬럼내로 도입되는 것을 특징으로 하는 공정.
  12. 제1항에 있어서, 생산물 질소가 적어도 98몰%의 순도를 가지는 것을 특징으로 하는 공정.
  13. 제1항에 있어서, 생산물질소는 공급공기로서 컬럼내로 도입된 질소의 적어도 50%인 것을 특징으로 하는 공정.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850008512A 1984-11-15 1985-11-14 보조 리보일러를 추진력으로 하는 혼성 질소 발생기 KR900007208B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/671,939 US4594085A (en) 1984-11-15 1984-11-15 Hybrid nitrogen generator with auxiliary reboiler drive
US671,939 1984-11-15

Publications (2)

Publication Number Publication Date
KR860004294A true KR860004294A (ko) 1986-06-20
KR900007208B1 KR900007208B1 (ko) 1990-10-05

Family

ID=24696498

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850008512A KR900007208B1 (ko) 1984-11-15 1985-11-14 보조 리보일러를 추진력으로 하는 혼성 질소 발생기

Country Status (8)

Country Link
US (1) US4594085A (ko)
EP (1) EP0183446B2 (ko)
JP (1) JPS61122478A (ko)
KR (1) KR900007208B1 (ko)
BR (1) BR8505754A (ko)
CA (1) CA1246436A (ko)
ES (1) ES8701681A1 (ko)
MX (1) MX164315B (ko)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610973A1 (de) * 1986-04-02 1987-10-08 Linde Ag Verfahren und vorrichtung zur erzeugung von stickstoff
US4777803A (en) * 1986-12-24 1988-10-18 Erickson Donald C Air partial expansion refrigeration for cryogenic air separation
GB8828133D0 (en) * 1988-12-02 1989-01-05 Boc Group Plc Air separation
US4902321A (en) * 1989-03-16 1990-02-20 Union Carbide Corporation Cryogenic rectification process for producing ultra high purity nitrogen
US5116396A (en) * 1989-05-12 1992-05-26 Union Carbide Industrial Gases Technology Corporation Hybrid prepurifier for cryogenic air separation plants
US4934148A (en) * 1989-05-12 1990-06-19 Union Carbide Corporation Dry, high purity nitrogen production process and system
US4931070A (en) * 1989-05-12 1990-06-05 Union Carbide Corporation Process and system for the production of dry, high purity nitrogen
US5004482A (en) * 1989-05-12 1991-04-02 Union Carbide Corporation Production of dry, high purity nitrogen
FR2651035A1 (fr) * 1989-08-18 1991-02-22 Air Liquide Procede de production d'azote par distillation
US5074898A (en) * 1990-04-03 1991-12-24 Union Carbide Industrial Gases Technology Corporation Cryogenic air separation method for the production of oxygen and medium pressure nitrogen
US5123946A (en) * 1990-08-22 1992-06-23 Liquid Air Engineering Corporation Cryogenic nitrogen generator with bottom reboiler and nitrogen expander
US5167125A (en) * 1991-04-08 1992-12-01 Air Products And Chemicals, Inc. Recovery of dissolved light gases from a liquid stream
US5170630A (en) * 1991-06-24 1992-12-15 The Boc Group, Inc. Process and apparatus for producing nitrogen of ultra-high purity
US5163296A (en) * 1991-10-10 1992-11-17 Praxair Technology, Inc. Cryogenic rectification system with improved oxygen recovery
US5195324A (en) * 1992-03-19 1993-03-23 Prazair Technology, Inc. Cryogenic rectification system for producing nitrogen and ultra high purity oxygen
US5303556A (en) * 1993-01-21 1994-04-19 Praxair Technology, Inc. Single column cryogenic rectification system for producing nitrogen gas at elevated pressure and high purity
US5385024A (en) * 1993-09-29 1995-01-31 Praxair Technology, Inc. Cryogenic rectification system with improved recovery
US5697229A (en) * 1996-08-07 1997-12-16 Air Products And Chemicals, Inc. Process to produce nitrogen using a double column plus an auxiliary low pressure separation zone
US5682762A (en) * 1996-10-01 1997-11-04 Air Products And Chemicals, Inc. Process to produce high pressure nitrogen using a high pressure column and one or more lower pressure columns
GB9726954D0 (en) * 1997-12-19 1998-02-18 Wickham Michael Air separation
US6065306A (en) * 1998-05-19 2000-05-23 The Boc Group, Inc. Method and apparatus for purifying ammonia
GB0119500D0 (en) * 2001-08-09 2001-10-03 Boc Group Inc Nitrogen generation
US6568209B1 (en) 2002-09-06 2003-05-27 Praxair Technology, Inc. Cryogenic air separation system with dual section main heat exchanger
FR2853723B1 (fr) * 2003-04-10 2007-03-30 Air Liquide Procede et installation de traitement d'un bain de liquide riche en oxygene recueilli en pied d'une colonne de distillation cryogenique
US8020408B2 (en) * 2006-12-06 2011-09-20 Praxair Technology, Inc. Separation method and apparatus
US8429933B2 (en) * 2007-11-14 2013-04-30 Praxair Technology, Inc. Method for varying liquid production in an air separation plant with use of a variable speed turboexpander

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203193A (en) * 1963-02-06 1965-08-31 Petrocarbon Dev Ltd Production of nitrogen
DE1501727A1 (de) * 1966-03-31 1969-10-30 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Gasgemischen
JPS4867176A (ko) * 1971-12-17 1973-09-13
US4017276A (en) * 1976-06-22 1977-04-12 The Lummus Company Deoxygenation of water
JPS5439343A (en) * 1977-09-02 1979-03-26 Sanyo Electric Co Ltd Bonding method
US4400188A (en) * 1981-10-27 1983-08-23 Air Products And Chemicals, Inc. Nitrogen generator cycle
US4382366A (en) * 1981-12-07 1983-05-10 Air Products And Chemicals, Inc. Air separation process with single distillation column for combined gas turbine system
US4464188A (en) * 1983-09-27 1984-08-07 Air Products And Chemicals, Inc. Process and apparatus for the separation of air

Also Published As

Publication number Publication date
EP0183446B1 (en) 1990-05-16
BR8505754A (pt) 1986-08-12
MX164315B (es) 1992-08-03
ES8701681A1 (es) 1986-12-01
US4594085A (en) 1986-06-10
EP0183446A3 (en) 1987-05-13
JPS61122478A (ja) 1986-06-10
EP0183446B2 (en) 1995-12-27
EP0183446A2 (en) 1986-06-04
CA1246436A (en) 1988-12-13
KR900007208B1 (ko) 1990-10-05
ES548865A0 (es) 1986-12-01
JPH0140268B2 (ko) 1989-08-28

Similar Documents

Publication Publication Date Title
KR860004294A (ko) 보조 리보일러를 추진력으로 하는 혼성 질소 발생기
KR930010595B1 (ko) 공기 증류로부터의 아르곤 회수율을 증가시키는 공정 및 장치
KR860001999A (ko) 초고순도 산소의 제조방법
JPH06117753A (ja) 空気の高圧低温蒸留方法
US4783210A (en) Air separation process with modified single distillation column nitrogen generator
JPH0849967A (ja) 液体空気ストリッピングを備える極低温空気分離システム
KR960024196A (ko) 저온 공기 분리 방법 및 장치
KR20020075252A (ko) 공기 분별용 3 칼럼 시스템 및 미정제 아르곤 칼럼을사용하는 아르곤 수득 방법
KR960013411A (ko) 저순도의 산소를 제조하기 위한 사이드 칼럼 저온 정류 시스템
JPH07109348B2 (ja) 空気の高圧低温蒸留方法及び装置
US5682764A (en) Three column cryogenic cycle for the production of impure oxygen and pure nitrogen
US5485729A (en) Air separation
US5363657A (en) Single column process and apparatus for producing oxygen at above-atmospheric pressure
KR950031896A (ko) 순수한 아르곤을 회수하기 위한 방법 및 장치
KR950003774A (ko) 저순도 산소 제조용 저온 정류 시스템
KR920000364A (ko) 이중 공급공기 사이드 콘덴서를 갖는 저온공기분리 시스템
US5711167A (en) High efficiency nitrogen generator
KR100313616B1 (ko) 산소를 동시에 생성하는 복수 개의 증류탑으로된 질소 발생기의극저온 공기 증류 방법
JPH102664A (ja) 低純度及び高純度の酸素製品を製造する圧縮原料空気流の低温蒸留方法
KR970025674A (ko) 질소 생성을 위한 공기 분리방법 및 장치
KR920000365A (ko) 이중온도 공급된 터빈팽창을 사용한 저온 기 분리장치
KR950009205A (ko) 펌프된 액체 질소에 의해 고압 질소를 생성하는 극저온 공기 분리 방법
KR20000052974A (ko) 압축 질소를 생성시키는 방법 및 장치
US4895583A (en) Apparatus and method for separating air
KR100308080B1 (ko) 저순도 산소 및 고순도 질소를 제조하기 위한 방법 및 장치

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19950925

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee