生活污泥与煤混烧及热解特性

采用热重分析法，对生活污泥与煤以1∶1质量比混合的试样进行燃烧及热解实验研究，重点分析了升温速率对其热解及燃烧特性的影响，为煤泥混烧及热解技术的工业化应用提供理论支持。结果表明：煤泥混合样燃烧失重分为4个阶段，混燃过程中污泥与煤共同影响着混合试样的燃烧特性，随着升温速率从15 ℃·min-1增加到50 ℃·min-1，其可燃性指数C增幅达60%和综合燃烧特性指数S提高了4倍多，燃烧性能得到明显提高；煤泥混合样的热解失重分为2个阶段，各阶段热解的挥发份最大析出速率（dw/dt）max及挥发分析出特性指数D均随升温速率的升高而大幅增大，且试样总的挥发综合释放指数D从0.081 7×10-8K-3·min-2增大到5.868×10-8K-3·min-2，可见升温速率越高，煤泥混合物的热解性能越好。

Combustion and pyrolysis characteristics of sewage sludge and coal

In order to provide theoretical support for industrial application, combustion and pyrolysis characteristics of sewage sludge with coal were studied using a thermogravimetric analyzer in equal mass ratio. The influence of heating rate on the combustion and pyrolysis characteristics was emphatically analyzed. The results showed that the combustion loss of sludge-coal mixed fuel was divided into four stages and the combustion characteristics were affected by both sludge and coal during the combustion process. When the heating rate increased from 15 to 50℃·min-1, the increase of the flammability index (C) reached 60%, and the comprehensive combustion characteristic index (S) increased more than four times, at which point, combustion performance was significantly improved. The pyrolysis weight loss of sludge-coal mixed fuel was divided into two stages. With the increase in the heating rate, the maximum release rate (dw/dt)max and the release feature index (D) increased substantially in each stage. The total volatile release index (D) of the sample increased from the 0.081 7×10-8K-3·min-2 to 5.868×10-8K-3·min-2. Therefore, the higher heating rate proved to be better for the performance of the pyrolysis of sludge-coal mixed fuel.