污泥连续式微波热解制备生物气  

Production of biosyngas from continuous microwave-induced pyrolysis of sewage sludge

作　　者：刘立群[1] 张军[1] 吴晓燕[1] 田禹[1] 张杰[1] LIU Liqun ZHANG Jun WU Xiaoyan TIAN Yu ZHANG Jie(School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China)

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《环境工程学报》2016年第11期6622-6628,共7页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07201007);高等学校博士学科点专项科研基金资助项目(20112302110060);中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2015096);黑龙江省博士后科学基金资助项目(LBH-Z14093)

摘　　要：采用升温迅速的微波能作为热源,利用自主设计微波设备对含水率为82%(m/m)的湿污泥进行高温热解实验。采用单因素实验法,探究热解终温、停留时间、活性炭添加量对污泥热解生物气组分和含量的影响规律,确定连续式运行的最佳工况条件:热解终温900℃,停留时间50 min,活性炭添加比例为30%,热解功率1 600 W;在此基础上进行连续12h微波高温热解实验,共热解污泥56 kg,产生生物气32.26 kg,热解油10.98 kg,固体残渣12.66 kg,产气转化率高达57.8%,生物气组分H_2+CO含量高达67%,热解产物具有良好的工业利用价值。污泥热解生物气中H2S浓度超标10倍以上,而NH_3浓度未超标,硫化氢的去除技术研究值得关注。Microwave energy was used as the heat source for a pilot-scale high-temperature pyrolysis experiment using wet sludge with 82%（ m / m） moisture content. The single-factor experiment was used to investigate the effects of final temperature,residence time,and activated carbon content on resulting biosyngas composition and yield. A 12-hour continuous microwave-induced pyrolysis experiment was conducted under the optimum conditions established for continuous operation（ pyrolysis temperature 900 ℃,residence time 50 min,active carbon ratio of30% and MW power of 1 600 W）. As a result,32. 26 kg of biosyngas,10. 98 kg of liquid oil,and 12. 66 kg of solid residue were produced from 56 kg of sewage sludge. The conversion rate of gas products was as high as 57. 8%,in which the yields of H_2 and CO reached 67%,indicating good potential for industrial utilization. According to the Chinese standard of odor pollutants,the resulting H_2S concentration exceeded 10 times while NH_3 concentration was within the limit. Thus,it should be concerned about the removal technology of H_2S in the pyrolysis biosyngas.

关 键 词：微波热解 污水污泥 连续运行 生物气 

分 类 号：X703[环境科学与工程—环境工程]