Comparisons of four quench methods for high temperature Syngas-Exergy Analyses
Entrained flow slagging gasifiers have been found in many applications, one of which is IGCC. The quench of high temperature syngas from first stage of entrained flow slagging gasifiers is of great importance for the availability of gasifiers, and it influences the economical running of utilization system. Four kinds of quench methods including water quench, gas quench, radiant quench and chemical quench, are investigated by Gibbs free energy minimization and exergy analyses. The exergy distributions of the streams into and out of each quench system are obtained. The results show that exergy loss of water quench is the biggest, and the exergy loss of chemical quench is the least and can be neglectable. The exergy losses of the other two quench methods are comparable, which are only 1/3 smaller than that of water quench. Chemical quench not only features in lower oxygen consumption as well as a higher cold gas efficiency, but also has high exergy efficiency.
Syngas Quench Exergy Analyses Gasification
Y.H.Liu W.Chen D.F.Che Z.D.Cao
State Key Laboratory of Multiphase Flow in Power Engineering, Xian Jiaotong University, China Schoo School of Energy and Power Engineering, Xian Jiaotong University, China
国际会议
西安
英文
674-679
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）