对生活垃圾焚烧炉掺烧市政污泥所产生飞灰的螯合稳定化实验研究

环境卫生工程

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对生活垃圾焚烧炉掺烧市政污泥所产生飞灰的螯合稳定化实验研究

上海康恒环境股份有限公司

收稿日期:2021-12-29 修回日期:2022-02-10 接受日期:2022-05-07

Experimental Study on Fly Ash stabilization of MSWI co-Incineration of Municipal Sludge

Shanghai SUS Environment Co. Ltd.

Received:2021-12-29 Revised:2022-02-10 Accepted:2022-05-07

摘要/Abstract

摘要：

以国内某垃圾焚烧电厂炉排炉掺烧市政污泥产生的飞灰作为实验样本，对掺烧污泥产生飞灰的重金属总量与浸出特性进行了分析比较。结果表明，与零掺烧相比，掺烧市政污泥虽然减少了飞灰中重金属的总量，但污泥掺烧产生的SOx消耗了碱性药剂使得飞灰的残留碱度明显下降，相应浸出pH低至5.27，Pb、Cd等重金属浸出浓度远高于GB 16889限值。对掺烧污泥产生的飞灰添加10%的消石灰，可提高飞灰残留碱度，浸出pH提高至6.32，Pb、Zn、Cd、As浸出浓度低于GB 16889。因此在掺烧污泥的同时对烟气净化系统的脱酸药剂加量进行灵活调整，对提高飞灰浸出稳定性有着积极作用。

关键词: 垃圾焚烧, 污泥协同掺烧, 飞灰, 重金属浸出

Abstract:

The fly ash from a MSWI co-incineration of municipal sludge was analyzed to compare the heavy metal content and leaching characteristics. The results showed that co-incineration of municipal sludge reduced the total amount of heavy metals in fly ash..While the SOx generated by sludge blending consumes alkaline reagents, which significantly reduces the residual alkalinity of fly ash, leading to the low leaching pH of 5.27. The corresponding leaching concentration of heavy metals such as Pb and Cd was much higher than the limits of GB 16889.Addition of 10% limestone into fly ash increased the residual alkalinity, indicated by a higher leaching pH of 6.32 and lower leaching concentration of Pb、Zn、Cd、As than the limits of GB 16889. While mixing the sludge, the amount of deacidification agent feed into the flue gas purification systemis suggested to be flexibly adjusted, which would contribute to the heavy metal stability of fly ash.

Key words: Waste incineration, co-incineration of sludge, fly ash, the leaching of heavy metal

龙吉生, 张毅扬, 阮大年, 胡发立. 对生活垃圾焚烧炉掺烧市政污泥所产生飞灰的螯合稳定化实验研究 [J]. 环境卫生工程, 0, (): 0-.

LONG Jisheng, ZHANG Yiyang, RUAN Danian, HU Fali. Experimental Study on Fly Ash stabilization of MSWI co-Incineration of Municipal Sludge[J]. Environmental Sanitation Engineering, 0, (): 0-.

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