IGCC电站脱硫系统中的羰基硫水解工艺

摘要

介绍某IGCC(整体煤气化联合循环)电站净化单元脱硫系统中羰基硫(COS)水解器的水解工艺.对COS水解器的启动方式和运行工况进行优化,在试验研究的基础上给出了COS水解器运行的最佳条件:床层温度180℃,空速1 451 h-1,工艺气冷却器出口原料气温度50～60℃.在此工况下运行,COS水解转化率可达92.5％.此外,分析COS水解器运行中常见问题,指出必须严格控制原料气中氧气和水蒸气的含量.%The COS hydrolysis system of gas purification in one integrated gasification combined cycle (IGCC) power plant is introduced. Through the optimization of the startup modes and operating conditions of the COS hydrolysis system, the best operating condition is determined from experimental researches, i.e., 180℃of the layer temperature of the COS hydrolysis, 1451 h-1 of the space velocity, and the temperature of raw coal gas at the process gas cooler outlet between 50 and 60℃. Operated under this condition, the COS hydrolysis conversion rate can reach 92.5%. In addition, the common issues in the operation of the COS hydrolysis system are analyzed, which concludes that the oxygen and water vapor contents of the raw coal gas shall be strictly controlled.