生活垃圾焚烧飞灰高压压制技术开发及示范工程

High pressure compression technology development and engineering for fly ash from municipal solid waste incineration

以某生活垃圾焚烧电厂飞灰减容工程为例,对高压压制技术处置生活垃圾飞灰进行了研究,分析了螯合灰密度和压块无侧限抗压强度分别与作用压强的关系。通过调节原料含水率、原料温度、成型尺寸、压制压强,优化了飞灰高压压制主要工艺参数。经工程应用验证,该技术能够大幅提高飞灰密度,减容率达50%以上,成型率达到90%以上;飞灰压制成品能满足生活垃圾填埋场的浸出毒性标准。飞灰高压压制技术可有效提高填埋场的飞灰填埋库容效率,大幅延长现有填埋场的运营寿命。

In the volume reduction project of fly ash from a municipal solid waste incineration power plant,the high pressure technology for fly ash disposal was studied,and the relationships between chelating ash density,unconfined compressive strength of the block and action pressure were analyzed.The main process parameters were optimized by adjusting the moisture content and temperature of raw material,forming size and pressing pressure.Proven by engineering applications,this technology could elevate fly ash density with over 50%volume reduction and over 90%molding rate.The finished product from compressed fly ash could meet the leaching toxicity standard of domestic solid waste landfill.The fly ash compression technology can effectively improve the storage efficiency of fly ash landfill and greatly extend the operation life of the existing landfill sites.