【作者】 王卫良； 吕俊复； 张建胜； 刘青； 岳光溪； 沈解忠； 苏小平；

【Author】 WANG We-iliang1, LU Jun-fu1, ZHANG Jian-sheng1, LIU Qing1, YUE Guang-xi1, SHEN Jie-zhong2, SU Xiao-ping2 (1. Department of Thermal Engineering Tsinghua University, Beijing 100084, China; 2. Department of Boiler Design, Wuxi Huaguang Boiler Co. Ltd., Wuxi city, Jiangsu 214026, China)

【机构】 清华大学热能工程系； 无锡华光锅炉股份有限公司设计处；

【摘要】 在小型流化床实验台上对还原条件下硫化物生成进行研究。实验结果表明,还原态条件下燃料中的硫首先以H2S的形式生成,少量的硫以SO2的形式产生,作者认为这主要是由于硫酸盐的分解。H2S产生速率受还原性气氛还原程度的影响很大,还原性越强,产生的H2S的速率越大;另外H2S的产生速率还与煤中挥发份含量有关,挥发份含量越高,H2S产生的越早;硫化氢的总产率随着煤中含硫量的提高而增大。因此,循环流化床的脱硫过程中必须采取有效措施来去处燃烧过程中产生的H2S,特别对于燃烧高硫煤种。更多还原

【Abstract】 Sulfide generation in a reductive environment in a fluidized bed combustor was investigated experimentally based on measurements in a bench scale fluidized bed. The experiment results show that in a reductive environment, sulfur in the coal is converted first to H2S, with very little SO2 found in the exhaust gas. The H2S is believed to come from the decomposition of sulfate. The conversion rate of H2S depends on the reductive environment as well as the content of the volatile matter in the coal. The total yield of H2S increases with increasing sulfur content in the coal. Therefore, effective measures must be developed to remove H2S generated during coal combustion in CFB boilers, especially for high sulfur content coals.更多还原