干化污泥与煤矸石混合热解制可燃气的研究

Study on pyrolysis characteristics of the mixture of dried sewage sludge and coal gangue to generate combustible gases

以某污水厂市政污泥和3种不同产地(峰峰、新柏和山寨)的煤矸石作为研究对象,在实验室分别进行样品预处理后,使用管式电阻炉进行了热解实验。实验结果表明,污泥热解中加入矸石不改变污泥热解产生可燃气的规律。添加煤矸石后污泥热解产生的可燃气量会有所增加,而在污泥热解实验中加入煤矸石会对热解CO气浓度提高有促进,分析认为,部分原因是由于煤矸石中挥发分受热分解析出;另一原因是煤矸石中的矿物成分高温受热后脱水,促进了水煤气等相关反应的发生。

Pyrolysis on some municipal sewage sludge and three different kinds of coal gangues（Fengfeng,Xinbai and Shanzhai） was carried out on the tube furnace for sample pretreatment,respectively.The coal gangue blended with dried sewage sludge to pyrolysis showed that the gas generation can be increased,but not change the characteristics of the gas production and gas composition.Adding coal gangue could enhance the concentration of CO,because of water-gas shift reaction occurred and decomposition of volatile components in the coal gangue caused by heat.