Abstract: Sludge was conditioned with Fenton's reagent(Fe²⁺+H₂O₂), CaO and coal, followed by deep dewatering. Seven factors, including four conditioner components, temperatures, flow rate and moisture, were studied by using Plackett-Burman(P-B) experimental scheme method. The results show that six factors had influences on sludge pyrolysis except for H₂O₂. Among them, temperature exerted the most significant effects. High temperature was favorable for combustible gas generation while fast flow rate decreased the gas yield. In addition, CO and H₂ production could be improved by the presence of CaO, coal and moisture. Conditioner CaO and coal promoted the combustible gases generation from sludge, which was more efficient than physical mixture of sludge and CaO or coal. For generation of combustible gas the internal residual moisture in sludge was more effective than free water, which was significantly influenced by temperature. In conclusion, deep dewatered sludge pyrolysis has some advantages for generation of combustible gas.

Key words: deep dewatering, sludge, pyrolysis, P-B design, impact significance

摘要： 采用Fenton试剂（Fe²⁺+H₂O₂）、CaO和煤调理污泥，然后进行深度脱水。用Plackett-Burman（P-B）进行实验设计，研究了这4种调理物质与温度、通气速率和水分共7个因子对污泥热解的影响权重。结果表明，除H₂O₂外，其余6个因子对污泥热解均有影响。其中温度影响最大，高温有利于热解可燃气体生成。而通气速率越快，热解产气越少。此外，CaO、煤和水的单独影响实验证明3种因子的存在都有利于CO和H₂的生成，且CaO和煤作为调理剂时增强效果好于其与污泥物理混合。污泥内残留水也优于外加水，但水分受温度的影响较大。由此可见，深度脱水湿污泥热解在制可燃气体方面具有一定的优势。

关键词: 深度脱水, 污泥, 热解, P-B设计, 影响权重