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Received July 11, 2018
Accepted August 14, 2018
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순산소 연소를 위한 초저온 공기분리장치의 최적공정 설계 연구
A Study on the Optimal Process Design of Cryogenic Air Separation Unit for Oxy-Fuel Combustion
1대성산업가스(주) 초저온연구소, 15434 경기도 안산시 단원구 산단로 128 2공주대학교 화학공학부, 31080 충남 천안시 서북구 천안대로 1223-24
1Daesung Cryogenic Research Institute, Daesung Industrial Gases Co., Ltd., 128, Sandan-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15434, Korea 2Department of Chemical Engineering, University of Kongju, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 31080, Korea
jhcho@kongju.ac.kr
Korean Chemical Engineering Research, October 2018, 56(5), 647-654(8), 10.9713/kcer.2018.56.5.647 Epub 5 October 2018
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Abstract
지구 온난화 문제 해결과 온실가스 감축을 위하여 화력발전소를 중심으로 순산소 연소를 통한 CO2 포집 기술이 개발 되었으나, 산소 생산 비용이 높아 경제성이 떨어지는 문제를 가지고 있다. 순산소 연소에 필요한 대량의 산소(>2,000 tpd)를 생산하는 방법은 초저온 공기분리장치(ASU: Air Separation Unit)가 가장 적합한 것으로 알려져 있으나, 대부분 고순도(>99.5%) 산소 생산에 최적화되어 건설되었다. 이런 초저온 공기분리장치에서 순산소 연소에서 사용이 가능한 낮은 순도(90~97%)의 산소를 생산하고 공정을 최적화할 경우, 공정 효율이 높아져 산소 생산 비용 절감이 가능하다. 본 연구에서는 순산소 연소 발전시스템에 산소를 공급할 수 있는 초대형(>2,000 tpd O2) ASU 개발을 위하여 공정 분석 및 비교 평가를 수행하였다. 상용 프로그램인 AspenHysys를 이용하여 산소 순도에 따른 회수율 및 전력소모량을 계산하고 공정의 효율을 평가하였다. 그 결과 ASU를 통해 순산소 연소에 공급되는 산소는 약 95%가 최적이며, 생산 공정 최적화 시 약12~18%의 전력소모량 절감이 가능한 것을 확인 할 수 있었다.
In order to solve the global warming and reduce greenhouse gas emissions, it has been developed the CO2 capture technology by oxy-fuel combustion. But there is a problem that the economic efficiency is low because the oxygen production cost is high. ASU (Air Separation Unit) is known to be most suitable method for producing large capacity of oxygen (>2,000 tpd). But most of them are optimized for high purity (>99.5%) oxygen production. If the ASU process is optimized for low purity(90~97%) oxygen producing, it is possible to reduce the production cost of oxygen by improving the process efficiency. In this study, the process analysis and comparative evaluation was conducted for developing large capacity ASU for oxy-fuel combustion. The process efficiency was evaluated by calculating the recovery rate and power consumption according to the oxygen purity using the AspenHysys. As a result, it confirmed that the optimal purity of oxygen for oxyfuel combustion is 95%, and the power consumption can be reduced by process optimization to 12~18%.
Keywords
References
Barron RF, Monographs on Cryogenics, New York: Oxford University Press(1985).
Yong PS, Moon HM, Son MR, Yi S, J. KIGAS, 1(1), 41 (1997)
Yong PS, Moon HM, Yi SC, J. KIASC, 3(1), 69 (2001)
IEA Report 2005/9, “Oxy Combustion Processes for CO2 Capture from PowerPlant”(2005).
Harry C, Williamsville NY, U.S Patent, 5,463,871(1995).
Rakesh A, Zbigniew E, Macungie TF, U.S Patent, 5,682,764(1997).
Allam RJ, Energy Procedia, 1(1), 461 (2009)
Higginbotham P, White V, Fogash, K, Guvelioglu G, Energy Procedia, 4, 884 (2011)
Fu C, Gundersen T, Energy, 44(1), 60 (2012)
Lee HK, Choi SM, Moon HM, Seo SI, Energy Technology, 1, 217 (2013)
Ebrahimi A, Meratizaman M, Reyhani HA, Pourali O, Amidpour M, Energy, 90, 1298 (2015)
Aspen Technology, “AspenHysys Thermodynamics V.8.8,” (2015).
Hankinson RW, Thomson GH, Brobst KR, AIChE J., 28, 671 (1982)
Yong PS, Moon HM, Son MR, Yi S, J. KIGAS, 1(1), 41 (1997)
Yong PS, Moon HM, Yi SC, J. KIASC, 3(1), 69 (2001)
IEA Report 2005/9, “Oxy Combustion Processes for CO2 Capture from PowerPlant”(2005).
Harry C, Williamsville NY, U.S Patent, 5,463,871(1995).
Rakesh A, Zbigniew E, Macungie TF, U.S Patent, 5,682,764(1997).
Allam RJ, Energy Procedia, 1(1), 461 (2009)
Higginbotham P, White V, Fogash, K, Guvelioglu G, Energy Procedia, 4, 884 (2011)
Fu C, Gundersen T, Energy, 44(1), 60 (2012)
Lee HK, Choi SM, Moon HM, Seo SI, Energy Technology, 1, 217 (2013)
Ebrahimi A, Meratizaman M, Reyhani HA, Pourali O, Amidpour M, Energy, 90, 1298 (2015)
Aspen Technology, “AspenHysys Thermodynamics V.8.8,” (2015).
Hankinson RW, Thomson GH, Brobst KR, AIChE J., 28, 671 (1982)
