극저온 공기분리 공정에 대한 modeling과 sensitivity analysis에 관한 연구
Modeling and Sensitivity Analysis of Cryogenic Air Separation Process
- 주제(키워드) 공기분리 , 극저온 공정
- 발행기관 포항공과대학교 일반대학원
- 지도교수 이인범
- 발행년도 2014
- 학위수여년월 2014. 2
- 학위명 석사
- 학과 및 전공 일반대학원 엔지니어링특성화협동과정
- 세부전공 Chemical process engineering
- 원문페이지 127
- 실제URI http://www.dcollection.net/handler/postech/000001673660
- 본문언어 한국어
- 저작권 포항공과대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Oxygen and nitrogen, the major products of air separation process, are widely used as resources, fuel, and raw materials in scientific and industrial fields such as steel, petrochemical, semiconductor, aeronautical and even medical as well. In particular the steel industry consumes large amounts of oxygen and nitrogen in the process of purification, de-carbonization, reduction and heating. Cryogenic air separation process is usually used in producing significant quantities of high purity oxygen and nitrogen in gaseous or liquid phase. In this study, the cryogenic air separation process being adapted for liquid oxygen and gaseous nitrogen production in a steel work is simulated, optimized and analyzed through sensitivity studies. Cryogenic double distillation column and heat exchangers, the key units in the cryogenic air separation process, were modeled by a simulation tool, Aspen Plus, to simulate the actual oxygen and nitrogen production process with operating conditions and product specifications in the field. The simulation model was optimized to derive the most efficient design and operating conditions and evaluated by sensitivity analysis.
more목차
1. 서 론
1.1. 연구 배경
1.2. 연구 개요
2. Air Separation Technologies
2.1. Cryogenic process
2.2. Adsorption
2.3. Polymeric membrane
2.4. Ion transport membrane
2.5. Chemical process
2.6. Comparison of air separation technologies
3. 이론적 배경
3.1. Features of air gases
3.2. Cryogenic air separation process
3.2.1. Process description
3.2.2. Physical property analysis
3.2.3. Air separation distillation column
4. Cryogenic Air Separation Process Simulation
4.1. Process modeling
4.1.1. Medium and Low pressure distillation columns
4.1.2. Double distillation column with heat exchangers
4.1.3.Double distillation column with gaseous and liquid air feed
4.2. Process optimization with increase in N2 production
5. Sensitivity Analysis
5.1. Lean-liquid flow rate versus O2 mole fraction in waste nitrogen
5.2. O2 mole fraction in lean-liquid versus O2 mole fraction in waste nitrogen
5.3. O2 product flow rate versus O2/N2 product purity
5.4. Split fraction in splitter 2 versus O2/N2 product purity and O2 recovery
5.5. Liquid air feed location in MP column versus O2/N2 product purity
5.6. Lean-liquid draw off location in MP column versus O2/N2 product purity
5.7. Liquid air and rich-liquid feed location in LP column versus O2/N2 product purity
6. 결 론
REFERENCES
APPENDIX
ACKNOWLEDGEMENT
CURRICULUM VITAE