不同级配垃圾焚烧底渣固化市政污泥工程特性分析  

Engineering characteristics analysis of sewage sludge solidified by different gradations municipal solid waste incineration bottom ash

作　　者：梁冰[1] 胡学涛[1,2] 陈亿军[2] 陈德强[2,3] 林青瑜[4] LIANG Bing HU Xuetao CHEN Yijun CHEN Deqiang LIN Qingyu(Institute of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000,China State Key Laboratory of Geomechanies and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China Institute of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China)

机构地区：[1]辽宁工程技术大学力学与工程学院,阜新123000 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [3]西南石油大学土木工程与建筑学院,成都610500 [4]武汉轻工大学化学与环境工程学院,武汉430023

出　　处：《环境工程学报》2017年第2期1117-1122,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金自助项目(51279199);中科院院地合作项目;中国科学院学科交叉与合作创新团队项目(文件号:人字(2013)47号)

摘　　要：开展了(炉排炉和流化床炉)两种垃圾焚烧底渣与固化剂共同作用下固化市政污泥的工程特性研究。分析了两种底渣化学成份及物理级配上的差异,重点考察了在密封养护情况下,测定了不同底渣固化体的含水率、pH值、无侧限抗压强度及28d渗透系数等工程特性指标。研究结果表明:相同含量的两种底渣固化体含水率及pH相同,且含水率随底渣含量增加而降低,而pH值随底渣含量增加而增加;随着底渣含量增加,级配良好的炉排炉底渣固化体强度比级配不良的流化床底渣固化体强度从高8 k Pa增加到30 k Pa;受底渣级配的影响,炉排炉底渣固化体渗透系数随底渣含量增加而增大,而流化床底渣固化体渗透系数基本不变。级配良好的炉排炉底渣固化体工程特性优于级配不良的流化床底渣固化体,具有更强的骨架作用。研究成果为污泥及垃圾焚烧底渣填埋处置提供了科学借鉴。In this study,an inorganic curing agent was added to two different types of municipal solid waste incineration（ MSWI） bottom ash,grate type incinerator and fluidized bed incinerator bottom ash,in order to treat municipal sludge. The differences in the chemical compositions and particle size distribution between the two types of bottom ash were analyzed. In particular,engineering indices,such as water content,pH,unconfined compressive strength,and the coefficient permeability of the solidified body after 28 days of sealed curing,were tested. The results showed that the two types of solid matrix with the same content of bottom ash had the same water content and pH,and the water content of the solid matrix decreased and the pH increased with an increase in the content of MSWI bottom ash. The unconfined compressive strength of the solidified body with the grate furnace bottom ash,which had a good gradation,was greater than that of the solidified body with circulating fluid bed（ CFB） bottom ash. It increased from 8 k Pa to 30 k Pa with increasing bottom ash content. The coefficient permeability of the solidified body with grate furnace bottom ash increased with an increase in the content of bot-tom ash. However,the coefficient permeability of the solidified body with CFB bottom ash was almost constant,which was caused by the particle size distribution of the bottom ash. Due to good gradation,the engineering characteristics of sewage sludge solidified by grate furnace bottom ash was better than that of CFB bottom ash,and sewage sludge solidified by grate furnace bottom ash had a stronger skeleton effect. This research provides an insight into landfill sludge and MSWI bottom ash.

关 键 词：市政污泥 固化 颗粒级配 垃圾焚烧底渣 工程特性 

分 类 号：X705[环境科学与工程—环境工程]