城镇污泥热干化及掺烧特性的试验研究——以嘉兴市污泥为例【毕业论文】.docxVIP

城镇污泥热干化及掺烧特性的试验研究——以嘉兴市污泥为例 摘 要UnRegistered随着经济的发展，城市污泥的产量也日益增加。污泥成分复杂，若不能进行有效处置，将会对人类本身和周边环境造成严重影响。目前，污泥处置方式主要包括卫生填埋、堆肥、消化、污泥干化及焚烧等。其中，污泥干化焚烧由于处置彻底并能够进行资源化利用，彰显出其巨大的优越性，在国内外得到越来越广泛的应用。因此，研究和分析污泥特性及在整个干化-焚烧过程中对系统及周围环境的影响显得尤为重要。本文首先介绍了城镇污泥的来源、性质、对环境的影响以及处置目的等。随后详细阐述了国内外污泥处置现状、发展趋势以及干化焚烧在实际中的运用等。然后针对污泥热干化工艺，着重分析了流化床工艺、带式工艺、涡轮薄层工艺、圆盘工艺以及桨叶工艺等。本文针对嘉兴市污水厂取样污泥的特性进行了分析，并通过实验来研究城镇污水厂污泥干化-焚烧特性，为后续处置工艺的选择提供参考。最后，通过着火性能、燃烧稳定性、烟气流量变化，以及锅炉经济性等方面，对污泥掺烧过程进行了深入的研究。分析了掺入不同含水率及不同量污泥对系统的影响，包括对受热面的磨损，对电厂尾气IUnRegistered排放的影响，对制粉系统及粉煤灰品质的影响等。本文通过污泥干化-焚烧试验及最后的掺烧特性研究，为国内污泥掺烧项目的设计与建设提供参考依据。关键词：城镇污泥，热干化，掺烧特性，资源利用IIRESEARCH ON URBAN SLUDGE THERMAL DRYING AND INCINERATION CHARACTERISTICS－EXAMPLE OF JIAXING SLUDGEABSTRACTUnRegisteredWith the development of economy, the amount of urban sludge becomes increasing. However, there are various hazardous substances in the sludge. Once processed in an inappropriate manner, these substances will have negative impacts on the environment. For now, many methods are being used in practical sludge treatment, including sanitary landfill, sludge incineration, and utilization for land, etc. In particular, the sludge incineration, superior over others, has been widely used in the domestic. Thus, it is important and necessary to analyze the properties of sludge during the drying and incineration.First of all, this paper introduces the sources, property, purpose of sludge, as well as its impacts on the environment. The second chapter elaborates the present situation, trends and relevant experience of sludge treatment at home and abroad. And it focuses on the usage in practice.IIIIn the third chapter, the technology of sludge drying at home and abroad are both analyzed and compared, including drying process in fluidized bed, belt-type drying process, TLC turbo drying device, rotary drum drying process, turntable drying process, and paddle steam drying process. The fourth chapter describes the experiment of drying and incineration, and analyzes the sludge characteri