文献类型：期刊文献

中文题名：城市污水污泥干化-焚烧系统热力分析

英文题名：Thermal analysis of municipal sewage sludge drying-incineration system

作者：钱柯贞[1,2];陈德珍[1,2];段妮娜[3];戴晓虎[4];杨子旭[5]

机构：[1]同济大学机械与能源工程学院,上海201804;[2]上海多源固废协同处理和能源化工程技术研究中心,上海201804;[3]同济大学环境科学与工程学院,上海200092;[4]上海市政工程设计研究总院(集团)有限公司,上海200092;[5]华东理工大学化工学院,上海200237

年份：2022

卷号：51

期号：5

起止页码：48

中文期刊名：热力发电

外文期刊名：Thermal Power Generation

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目(2020YFC1910100,2020YFC1908701)。

语种：中文

中文关键词：城市污泥;干化;焚烧;模拟;流化床;热力分析

外文关键词：municipal sewage sludge;drying;incineration;simulation;fluidized bed;thermal analysis

摘要：目前,污水处理厂污泥安全高效处理和处置问题在我国尚未彻底解决。干化-焚烧可实现污泥的无害化和减量化,针对典型污泥独立干化-焚烧工艺建立计算模型,探讨了热值、一次风温度等参数对污泥燃烧温度和辅助燃料需要量等的影响。结果显示:随着污泥热值升高,污泥燃烧温度升高,临界含水率上升,热值为10、12、14 MJ/kg的临界含水率约为45%、51%和54%;通过提高一次风温度,可以大幅度提高污泥燃烧温度,但是对于热值为12~14 MJ/kg污泥,在一次风温超过200℃情况下,燃烧温度超过950℃,需采取降温措施;污泥自身提供的热量无法满足污泥干化-焚烧系统整体能耗,干化-焚烧系统的辅助燃料需要量高于仅考虑焚烧系统的需要量;干化-焚烧系统的辅助燃料需要量随着入炉含水率的减少增加。
Currently, safe and efficient treatment/disposal of residual sludge is a thorny problem in China. Drying and incineration can realize innocuity and reduction of sludge. This study establishes a calculation model for typical sewage sludge independent drying-incineration and discusses the influences of low heating value(LHV) and primary air temperature on sludge combustion temperature and auxiliary fuel requirement. The results show that,the combustion temperature and critical moisture content of the sludge increases with the sludge heat value, the critical moisture content is about 45%, 51% and 54% respectively for incineration of sludges with 10, 12 and 14MJ/kg LHV. Increasing primary air temperature can significantly increase the combustion temperature of sewage sludge. However, when the sewage sludge is with LHV of 12~14 MJ/kg and the primary air temperature is above 200 ℃, the combustion temperature will be above 950 ℃, so cooling measures should be taken. The auxiliary fuel requirement of the dry-incineration system is higher than that without drying system because the heat provided by the sludge itself cannot meet the total energy consumption of the sludge dry-incineration system. The auxiliary fuel requirement of the dry-incineration system increases with the decrease of the moisture content.