KR940002588A - 화학공정의 최적화 방법 - Google Patents

화학공정의 최적화 방법 Download PDF

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KR940002588A
KR940002588A KR1019930013741A KR930013741A KR940002588A KR 940002588 A KR940002588 A KR 940002588A KR 1019930013741 A KR1019930013741 A KR 1019930013741A KR 930013741 A KR930013741 A KR 930013741A KR 940002588 A KR940002588 A KR 940002588A
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크래이그 핸슨 토마스
패트릭 보나퀴스트 단테
데일 조오단 마이클
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조운 이 페더리시
프랙스에어 테크놀로지, 인코포레이티드
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    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
    • 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
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    • 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
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    • 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
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Abstract

주어진 시간범위에서 최소한의 에너지 비용으로 전체 생성물 요구량에 일치 하도록 생성물을 생산하기 위한 최적의 생산스케쥴을 제공하는 종래의 혼합 정수 선형 프로그램 모델로 부터 생성물의 생성량이 결정될 수 있도록 생성물의 생성비율과 에너지 소비량을 관련시켜, 가기 생성물에 대한 소정의 요구량을 만족시키도록 공기 분리장치와 같은 생산부로 부터 두가지 이상의 생성물을 생성하는 방법.

Description

화학공정의 최적화 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 공기분리 및 액화장치의 전체적인 제어에 관련하여 본 발명에 따른 공정을 설명하는 블럭 다이어그램,
제3도는 액정 질소 및 액정 산소의 생성량과 에너지 소비량(킬로와트, KW)사이의 관계를 나타내는 공기분리 장치의 작동특성의 2차원 도면.

Claims (6)

  1. 여러 소비레벨을 가지는 소비구조에 따라 소비되는 전기에너지의 소비량을 최소화하기 위하여 에너지 소비 레벨의 수에 대하여 공식화 된 예정스케쥴에 따라 변화하며, 에너지 소비량과 관련하여 요구되는 생성물의 생성율에 부합하기 위하여 고정된 시간 범위내에서 필요한 생성물 생성율이 요구하는 각 생성물에 대한 소정의 요구량을 만족하도록 생산부로 부터 적어도 두개의 생성물을 생성하는 방법으로서, 주어진 시간범위 동안 각 생성물의 생산에 소요되는 에너지의 양과 생성물의 생성에 소요되는 에너지의 양과 생성물의 생성에 있어 임의의 단절을 포함하는 생산부로 부터 각 생성물의 생산비율과의 사이에 직선 또는 오목곡선의 함수관계로 생산부의 작동특성을 특정지우는 생산부에 대한 공정 모델을 공식화 하는 단계, 생성물의 생성에 있어서의 한계와 범위를 결정하는 생산부의 작동특성에 있어서, 공정의 제한 요인을 검증하는 단계, 상기 공정의 제한요인을 방해하지 않으면서 공정모델을 만족시키는 작동점을 선택하는 단계, 공정의 가능한 작동공간을 검증하는 각 작동점 매트릭스로 작동점의 선택을 제한하는 단계, 0부터 1까지의 수치를 나타내는 각 부분에 의해 불연속적 작동점의 매트릭스 내에 작동점의 일부분의 오목연결로 작동 공간내에서 가능한 작동부를 계산하는 단계, 한정된 작동공간내에 모든 알맞은 작동부에 대한 생성을 위한 에너지 소비량을 최소화시키는 주함수를 설정하는 단계, 해가 고정시간 범위내에 소정의 공정생산 레벨이 되도록 생성물을 생산하는데에 필요한 에너지 소비의 최소비율을 결정하는 주함수에 기초하는 제1선형 프로그램을 공식화하는 단계, 그리고 상기 직선형 프로그램 모델의 해를 구하는 단계로 이루어진 방법.
  2. 제1항에 있어서, 상기 프로그램의 해를 구함이 소정의 시간범위에 걸쳐 생산물을 생산하는데 드는 에너지 소비량을 최소화하는 제1선형 프로그램 모델의 해와 독립되는 제2선형 프로그램 모델을 설정하는 단계, 그리고 불연속 작동점 매트릭스 내의 적합한 작동점의 일부를 조합하여 이용계약상의 각 에너지 소비레벨에 대한 생성물 생산량으로 환산하여 생성물 생산량을 계산하는 단계를 더 포함하는 생성물 생산 방법.
  3. 제2항에 있어서, 상기 생성물이 액체산소, 액체질소, 액체 아르곤 및 기체산소, 기체질소 및 기체 아르곤으로 부터 각각 선택되는 유체물인 생성물 생산방법.
  4. 제3항에 있어서, 상기 생성물의 생성율과 설비장치에서 소비되는 전기에너지가 모니터되고, 상기 계산된 생성물 레벨에서 공기 분리설비의 작동을 유지하기 위하여 생산레벨에 해당하는 데이타와 비교하여 수치를 구하기 위한 입력데이타가 저장되는 공기 분리 설비에 생산되는 생성물 생산방법.
  5. 제4항에 있어서, 상기 제1의 선형 프로그래밍 모델이 아래와 같이 수학적으로 표현되며,
    최소화
    조건 :
    상기식에서 Cj=입력 데이타 j에 대한 비용 Xm.cc=공정 생성량의 설정치를 나타내는 생성물 생산방법.
  6. 제5항에 있어서, 상기 생성물에 대한 생산 레벨이 하기의 식과 같은 생성물 생성방법.
    KWj=에너지 비용레벨 j중 시간당 킬로와트-시간내의 에너지 이용비율, Pik=에너지비용레벨 j동안 시간당 유니트내에서 공정 생성물 K의 생성율.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930013741A 1992-07-29 1993-07-21 화학공정의 최적화 방법 KR940002588A (ko)

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US07/921,144 US5315521A (en) 1992-07-29 1992-07-29 Chemical process optimization method
US7/921,144 1992-07-29

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JP (1) JPH06182192A (ko)
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CN (1) CN1086009A (ko)
BR (1) BR9303028A (ko)
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