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이해평,류경옥 ( Hae Pyeong Lee,Kyong Ok Yoo ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.3
본 연구는 최적 열교환망 합성에 관한 연구로서 핀치 설계 방법을 기본으로 하였으며, 실제적인 열교환망 합성 이전 단계에서 최소 접근 온도차의 최적화를 수행함으로써 최적의 목표값을 설정하였다. 목표값 설정 단계에서는 제약 조건이 주어지거나 여러 개의 핀치점들을 갖는 계인 것으로 판단될 경우, 계의 분리법을 적용하여 보다 타당성있는 결과 값을 얻을 수 있었으며, 다중 유틸리티의 사용을 고려하여 에너지 비용의 절감 효과를 기대할 수 있었다. 실제적인 흐름들간의 합성 방법으로서는 경험 법칙들을 이용하였으며, 이 이론들을 근거로 하는 프로그램을 개발하여 몇 가지 예제들에 적용한 결과 값들을 제시하였다. This article for the synthesis of optimal heat exchanger network has been based on the pinch design method. The optimal targets were determined by the optimization of the minimum temperature difference before the actual synthesis steps. The system separation method was proposed to determine the reliable target for the system with multiple pinches or constraints. To save energy cost, we used multiple utilities. The program developed on the basis of several heuristics was applied to examples and we examined the validity of the results.
Dry Sorbent Injection 에 의한 배가스 처리 : Calcium 계와 금속산화물 흡착제를 이용한 HF 제거
이충무(Choong Moo Lee),오세천(Sea Cheon Oh),이해평(Hae Pyeong Lee),김희택(Hee Taik Kim),류경옥(Kyong Ok Yoo) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.3
In order to reduce HF in a flue gas via DSI process, the HF removal efficiency of calcium-based sorbent was investigated. By using gas chromatography the effluent gas exited from fixed-bed reactor was analyzed at temperature range of 250-950 ℃. Also BET, XRD, SEM/EDX, DLS and TG/DTA were carried out to certify the reaction mechanism. HF removal efficiency was maximum at 750 ℃ and decreased above this temperature because of specific surface area reduction resulted from structural changes of sorbent. Reactivity of sorbent was proportional to initial concentration of HF and flow rate of 150 ㎖/min showed the highest removal capacity. In addition, HF removal efficiency of various metal oxide sorbents such as Al₂O₃, Cu₂O, Fe₂O₃, MgO, TiO₂and ZnO was studied. As a result, Fe₂O₃ showed an excellent removal capacity in this study.