【作者】 李钢；

【导师】 舒新前；

【作者基本信息】 中国矿业大学（北京） ， 环境工程， 2009， 博士

【摘要】 污水污泥是城市污水处理厂进行水处理过程中产生的固体废弃物,其填埋和堆积不仅占用大面积耕地,而且对环境造成严重污染。本文以北京市高碑店污水污泥为试验对象,采用热解技术,在实验室热解炉装置平台上对经过预先干化处理的污泥进行了大量的热解实验研究,深入分析了市政污泥干化后在不同工况下热解的产物分布情况、产气特性、热解气体性质、热解液以及热解焦的特性,结果表明热解温度是影响污泥热解过程中最重要参数；随热解温度上升,气体产率迅速增加,热解液体产率和焦产率则呈下降趋势。热解气体主要由CO、H2、CH4和CO2组成；随着热解温度的升高,CO、H2的含量逐渐升高。同时利用SEM、TG、BET、GC和IR等先进的分析检测手段对污泥热解的产物进行了分析和表征。建立了污泥热解的数学预测方程。对几种工况下的污泥热解进行了评价。通过试验研究确定：在合适的试验条件下,可以获得较好污泥热解效果,认为热解是一种可以对污泥进行较有效资源转化利用和减排的技术。更多还原

【Abstract】 Municipal sewage sludge is a kind of the solid, semisolid and liquid floccule sludge with high moisture, organic substances produced in the treatment of waste water. The dump and landfill of sewage sludge not only occupies much farmland, but also causes environmental pollution. Abundant experiments have been conducted on the pyrolysis of dried sewage sludge on the fixed pyrolyzing furnace, and deeply analyses have been given to the production distribution, the gas characteristics, the pyrolysis gas quality, the characteristics of the pyrolysis solution and residual carbon. The results show that the pyrolysis temperature is the top-drawer parameter which affects the pyrolysis of the sewage sludge. With temperature increasing, the gaseous yield increase, the yield of pyrolysis tar and char yield decreases accordingly. The main components of pyrolysis gas are carbon monoxide, hydrogen, methane and carbon dioxide. The content of CO, H2 increases in gaseous component with the pyrolysis temperature increasing. In the same time, advanced detections such as SEM、TG、BET、GC and IR are used to analysis and character the performance of sewage sludge pyrolysis products, mechanism of sewage sludge is also discussed. The mathematical model of sewage sludge pyrolysis forecast is constituted and the integrative evaluation of pyrolysis under different conditions is realized. All of the experiment results show that under appropriate operating conditions of pyrolysis, the high efficient pyrolysis could be attained. And pyrolysis technology is regarded as a viable option for the resources conversion and emission reduction of sewage sludge at municipal wastewater treatment plants.更多还原