污泥半干化焚烧系统火用分析

发布时间：2017-12-28 02:37

本文关键词：污泥半干化焚烧系统火用分析?　出处：《热力发电》2017年02期 　论文类型：期刊论文

【摘要】：优化污泥干燥和焚烧系统能量的火用流分布,可有效提高污泥的处理效率。以国内某污泥半干化焚烧系统为研究对象,根据火用分析方法,建立了该系统的火用流模型,将系统划分为流化床焚烧炉、余热锅炉、干燥混合装置3个单元,通过对不同工况下的理论计算及对比分析,探讨系统火用利用指标的变化规律。计算结果表明:污泥入炉含水率为60%时,流化床焚烧炉、余热锅炉以及干燥混合装置的火用效率分别为46.56%、32.41%、53.03%;污泥入炉含水率降至50%时,焚烧炉的火用效率高达53.08%,余热锅炉的火用效率降低至23.10%,但产品火用提高了9.58%,干燥混合装置的火用效率降至51.93%,但产品火用提高了8.23%;降低入炉污泥含水率虽然增加了火用损失,但提高了各系统产品火用的总值以及焚烧炉燃烧部分的火用效率。研究结果可为城市污泥半干化焚烧系统的优化设计与运行提供理论参考。
[Abstract]:Optimizing the distribution of the exergy flow of the energy of the sludge drying and incineration system can effectively improve the efficiency of the sludge treatment. A domestic sludge semi dry incineration system as the research object, based on the exergy analysis method, establishes exergy flow of the system model, the system is divided into a fluidized bed incinerator, waste heat boiler, dry mixing device 3 units, through the calculation of the different conditions of theory and analysis, to explore the changes of system exergy utilization index. The calculation results show that the sludge into the furnace when water content is 60%, the fluidized bed incinerator, waste heat boiler and dry mixing device exergy efficiency were 46.56%, 32.41%, 53.03%; sludge into the furnace water content decreased to 50%, the exergy efficiency of incineration furnace up to 53.08% of the waste heat boiler exergy efficiency is reduced to 23.10%, but the product exergy exergy efficiency is improved by 9.58%, dry mixing device to 51.93%, but the product exergy increased by 8.23%; reduce the water content of sludge into the furnace while increasing the exergy loss, but increased the gross product and system exergy exergy efficiency of incinerator combustion. The research results can provide a theoretical reference for the optimization design and operation of the urban sludge semi dry incineration system.
【作者单位】：华北理工大学冶金与能源学院;北京京城环保股份有限公司;
【基金】：河北省科学技术研究与发展计划项目(11213941)~~
【分类号】：X703
【正文快照】： 随着我国城镇化进程的不断加速,城市污泥处理问题备受关注。污泥的处理方式主要以污泥的理化性质作为选择依据,相对于其他方式,污泥焚烧[1]具有处理速度快、处理量大、占地面积小、无需长期储存和长距离运输等优点,可有效达到减量化和无害化目的。同时,污泥焚烧后产生的热量以

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