基于半焦的城市污泥调质与深度脱水机理及污泥煤浆制备方法的研究

项目名称： 基于半焦的城市污泥调质与深度脱水机理及污泥煤浆制备方法的研究

项目编号： No.51478182

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 其他

项目作者： 戴财胜

作者单位： 湖南科技大学

项目金额： 84万元

中文摘要： 针对城市污泥水分高、不易脱水、难于处理处置及资源化利用的技术难题，拟选择城市污泥为研究对象，探讨基于半焦的污泥调质与深度脱水的关键影响因素，建立污泥脱水效果达到预定目标（浓缩污泥水分≤80%，且污泥浓缩后的上清液的质量达到国家污水综合排放二级标准）的污泥调质与深度脱水的方法。综合运用三维粒子图像测速仪、MLA、SEM等现代分析手段，采用污泥静置重力浓缩脱水及污泥抽滤脱水实验方法，研究半焦在污泥调质与深度脱水过程中的作用机制，揭示基于半焦的污泥调质与深度脱水的机理。利用热重分析、成浆实验等方法，探索污泥与煤混合的燃烧性能、成浆性能，确定污泥煤浆的制备方法，使污泥煤浆的质量达到国家水煤浆质量Ⅲ级标准，并且污泥（干基）与煤的配比≥10%，实现污泥的高效能源化利用。该项目不仅能创新污泥调质与脱水的理论与方法，还能开辟污泥资源化利用的新途径，有重要的理论意义和应用价值。

中文关键词： 半焦；污泥调质；深度脱水；浓缩污泥；污泥煤浆

英文摘要： In order to solve the key technical problem of high-moisture municipal sludge treatment and resource utilization, municipal sludge was chose as the research object to discuss the main influence factors of sludge conditioning and deep dewatering based on semi-coke, to ascertain the method of the sludge conditioning and deep dewatering, from which the intended target(moisture content of the condensed sludge≤80%, and with the quality of the upper water of sludge concentration meeting the national integrated wastewater discharge secondary standard) was achieved.The experimental methods of standing gravity dewatering as well as filtration dewatering were implemented, and analytical methods including 3D particle image velocimeter、 MLA、SEM were employed to investigate the function mechanism of semi-coke in the sludge conditioning and deep dewatering process.The combustion performance and slurry-ability of sludge-coal mixture was explored by using thermal gravimetric analysis, slurry preparation experiment and so on.The technology of preparing coal-sludge slurry from sludge and coal would be established,with the quality of coal-sludge slurry up to the National Quality Standards of coal water slurry(level 3) and the mass ratio of sludge(dry basis) to coal≥10%,result in high-efficiency energy sources utilization of municipal sludge.This project would not only innovate the thoery and methodology of sludge conditioning and dewatering,but also create a new approach to sludge utilization ,which contain important theoritical significance and practical value.

英文关键词： semi-coke;municipal sludge conditioning;deep dewatering;condensed municipal sludge;coal-sludge slurry