Fly ash stabilizing treatment process after household garbage incineration

Abstract

The invention provides a stabilizing treatment process for fly ash generated after household garbage incineration, and relates to the technical field of garbage treatment. A stabilizing treatment process for fly ash generated after household garbage incineration comprises the following treatment steps that firstly, a landfill unit pool is excavated, then a cement layer is poured into a landfill unit, an anti-leakage plastic film is laid and fixed on the cement layer, fly ash is transported to the landfill unit pool through a special fly ash transport vehicle, and the landfill unit pool is subjected to solid-liquid separation; and a stabilizing agent and fly ash are sprayed into the landfill unit pool by using the mixing ejector and then are buried. The stabilizing agent prepared by mixing phosphate and water is used for treating the fly ash, so that heavy metal components contained in the fly ash show supernormal stability and water insolubility, the harm to the environment caused by re-dissolution of heavy metals is eliminated, compared with a cement curing technology, the Pb dissolution rate is small, the stability is good, and the pollution of incineration fly ash to the environment is greatly reduced; a plurality of necessary process links in the traditional process are simplified, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a process for stabilizing fly ash after domestic garbage incineration. Background technique [0002] In the process of domestic waste incineration and disposal, a certain amount of fly ash will be produced. Fly ash is the product of the purification process of the smoke generated after domestic waste incineration, and contains harmful components that pollute the environment. Therefore, domestic waste incineration The generated fly ash needs to be managed and disposed of as hazardous waste. The soluble heavy metals contained in fly ash will dissolve into precipitation, groundwater, surface water, and leachate during temporary storage or landfill. Therefore, it may pollute water bodies Environment, before the fly ash can be safely landfilled, it must be stabilized or solidified, and can only be landfilled after reaching the standard. Stabilization / solidification (S / S) me...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a fly ash stabilization process after domestic waste incineration, which solves the problem that in the actual operation of the traditional process, the process is relatively complicated and there are many mechanical facilities, and corresponding various faults affect the normal operation. There are relatively many factors in production and the problem of high operating costs

Images