IGCC 합성가스 급속 냉각시스템의 운전 압력에 따른 열유동 및 입자 거동 특성 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 25; no. 1; pp. 97 - 104
• Main Authors: 박상빈(Sang Bin Park), 양주향(Joo Hyang Yang), 오준호(Jun Ho Oh), 예인수(In Soo Ye), 류창국(Chang Kook Ryu), 박성구(Sung Ku Park)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2014
• Subjects: 기계공학; CFD; 합성 가스; 석탄가스화복합발전; Fly slag; Quench; 전산해석; 침식; 냉각; Syngas; 비산 슬래그; 열전달; IGCC; Heat transfer; Erosion
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2014.25.1.097

In a coal gasifier for IGCC, hot syngas leaving the gasifier at about 1550oC is rapidly quenched by cold syngas recycled from the gas cleaning process. This study investigated the flow and heat transfer characteristics in the gas quench system of a commercial IGCC process plant under different operating pressures. As the operating pressure increased from 30 bar to 50 bar, the reduced gas velocity shortened the hot syngas core. The hot fly slag particles were retained within the core more effectively, and the heat transfer became more intensive around the hot gas core under higher pressures. Despite the high particle concentrations, the wall erosion by particle impaction was estimated not significant. However, large particles became more stagnant in the transfer duct due to the reduced gas velocity and drag force under higher pressures.