不同级配垃圾焚烧底渣固化市政污泥工程特性分析

发布时间：2018-03-06 00:13

本文选题：市政污泥　切入点：固化　出处：《环境工程学报》2017年02期 　论文类型：期刊论文

【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。
[Abstract]:The engineering characteristics of municipal sludge solidified by two kinds of solid waste incineration slag (grate furnace and fluidized bed furnace) were studied under the action of curing agent. The differences of chemical composition and physical gradation between the two kinds of slag were analyzed. The moisture content and pH value of different slag solidified bodies were determined under the condition of sealing and curing. The results show that the water content and pH of the solidified body of the two kinds of slag with the same content are the same, and the moisture content decreases with the increase of the slag content, while the pH value increases with the increase of the bottom slag content. With the increase of bottom slag content, the strength of slag solidified body in furnace grate with good gradation is increased from 8 KPA to 30 KPA, which is affected by bottom slag gradation, and the strength of slag solidified body in fluidized bed with poor grade is increased from 8 KPA to 30 KPA. The permeability coefficient of slag solidified body increases with the increase of bottom slag content, but the permeability coefficient of fluidized bed bottom slag solidification body is almost unchanged. The engineering characteristics of slag solidified body with good grading are better than that of fluidized bed slag solidified body with poor grading. The research results provide scientific reference for the landfill disposal of sludge and MSW incineration residue.
【作者单位】：辽宁工程技术大学力学与工程学院;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;西南石油大学土木工程与建筑学院;武汉轻工大学化学与环境工程学院;
【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)
【分类号】：X705;X703

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