采用污水厂污泥制陶粒的烧结工艺和配方研究_金宜英.pdf

中国环境科学 2009,29(1) ：17~21 China Environmental Science 采用污水厂污泥制陶粒的烧结工艺及配方研究 * 金宜英 ,杜 欣,王志玉,王兴润,聂永丰 (清华大学环境科学与工程系,北京 100084) 摘要：对污水厂污泥“干化-烧结”制陶粒的烧结工艺和物料配方进行了研究,分析了不同烧结工艺条件对陶粒产品强度、吸水率和密度等 性能指标的影响.结果表明,烧结温度对陶粒性能影响最大,而由于污泥本身熔点低,具有助熔作用,适宜的烧结温度与配方中污泥掺加量密 切相关.最佳污泥烧制陶粒工艺条件为,污泥最大掺加量 80%,350℃预热20min,1060 ℃烧结 15min. 关键词：污水厂污泥；陶粒；烧结工艺；配方 中图分类号：X705 文献标识码：A 文章编号：1000-6923(2009)01-0017-05 Research on technology and batch formula of sintering municipal sewage sludge for manufacturing haydite. JIN * Yi-ying , DU Xin, WANG Zhi-yu, WANG Xing-run, NIE Yong-feng (Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China). China Environmental Science, 2009,29(1)：17~21 Abstract ：Sintering technology and batch formula of “anhydration-sintering” for manufacturing haydite in municipal sewage sludge were studied. The impacts of process conditions on product compression strength, hygroscopic coefficient and density were analyzed. Sintering temperature had important influence on haydite. The fitting sintering temperature was decided by the sludge percentage in batch formula, because of sludge’s low melting point, low intensity and fluxing action. The best technical scheme was as followed: the sludge percentage could reach 80% at most and the sintering process was warm-up at 350 ℃ for 20 minutes and sintering at 1060℃ for 15 minutes. Key words：municipal sewage sludge ；haydite ；sintering technology；batch formula 近年来,我国城市生活污水厂污泥产量与 佳技术方案, 为完善污泥制陶粒工艺提供技术 日俱增. 目前国内对于污泥的处理处置方法通 支持. 常是填埋、焚烧和堆肥. 由于这些技术存在不 足[1],寻找有效的污泥资源化利用的方法尤为迫 1 材料与方法 切.污泥陶粒是污泥掺加辅料后,经造粒、焙烧而 1.1 材料与设备 成的一种建材[2]. 陶粒作为一种轻骨料,具有密 试验污泥为北京某污水处理厂的脱水污泥,含 度小、强度高、保温、隔热性能好的优点[3].污 水率为