污泥低温热解过程中含硫气体释放实验研究  

Investigation of Sulfur-Containing Gases Emission During the Low Temperature Pyrolysis of Sewage Sludge

作　　者：杨真乐[1] 乔瑜[1] 刘帅[1] 桂本[1] 何念[1] 魏盟盟[1] 徐明厚[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《工程热物理学报》2012年第12期2202-2206,共5页Journal of Engineering Thermophysics

基　　金：国家科技重大专项(No.2010ZX07319-002);国家重点基础研究发展计划(No.2011CB201500);国家自然科学基金(No.51021065;No.51161140330);华中科技大学研究生创新基金(No.HF-09-12-2011-121)

摘　　要：对污水处理厂污泥空干基进行了低温热解实验,研究了N_2、空气和CO_2气氛下六种含硫气体(H_2S、SO_2、CH_3SH、CS_2、C_2H_6S_2和COS)的释放特性,分析了其释放机理。结果表明:污泥低温热解时释放的含硫气体主要以H_2S、SO_2和CH_3SH形态为主,同时伴有少量CS_2、C_2H_6S_2和COS生成。H_2S、SO_2和CH_3SH生成机理以有机硫转化途径为主。FeS_2与CH_4的反应是CS_2生成的可能途径,CH_3SH的存在为C_2H_6S_2的生成提供了条件。CO_2促进了固态有机硫向气态硫的转化,O_2促进了已生成的CH_3SH的分解。The emission of 6 sulfur-containing gases （H2S, SO2, CH3SH, CS2, C2H6S2＆COS） were investigated during sewage sludge pyrolysis at low temperature. N2, air and CO2 were employed as carrier gases respectively. It was shown that the concentrations of H2S, SO2 and CH3SH are much higher than those of CS2, C2H682 and COS in these 6 sulfur-containing gases. It was proposed that H2S, SO2 and CH3SH were mainly formed from transformation of organic sulfur in sewage sludge. The reaction between FeS2 and CH4 was concluded the main cause of CS2 formation, CH3SH was believed as a precursor of C2H682. The transformation from organic sulfur in sewage sludge to sulfur-containing gases was improved by CO2. 02 also played a dominant role during decomposition process of CH3SH.

关 键 词：污泥 臭气 干化 热解 硫 

分 类 号：TU992.3[建筑科学—市政工程]