Innocent treatment system and method for household garbage incineration fly ash

Abstract

The invention discloses an innocent treatment system for household garbage incineration fly ash at least comprising a fly ash pretreatment subsystem, a pelleting subsystem, a plasma melting treatmentsubsystem, and an exhaust gas treatment subsystem; the fly ash pretreatment subsystem is used for multi-stage washing fly ash produced by household garbage incineration, and fly ash residues are obtained; the pelleting subsystem is used for mixing the fly ash residues with formula additive materials, and pelleting treatment is carried out to form fly ash particles; the plasma melting treatment subsystem is used for performing plasma melting treatment for the fly ash particles from the pelleting subsystem, and glass crystals are formed and cooled; and the exhaust gas treatment subsystem is usedfor performing innocent treatment for exhaust gas produced by the plasma melting treatment subsystem. The invention also discloses a corresponding method. The implementation of the innocent treatmentsystem and the method for household garbage incineration fly ash can realize disposal of harness, stabilization and recycling of the incineration fly ash.

Description

technical field [0001] The invention relates to the technical field of domestic waste incineration fly ash treatment, in particular to a system and method for harmless treatment of domestic waste incineration fly ash. Background technique [0002] Waste incineration disposal technology has become the preferred technology for dealing with urban domestic waste and some industrial waste in my country. The amount of waste incinerated continues to increase every year, and it has become a major breakthrough to solve the current situation of urban waste siege. However, waste incineration will produce a large amount of incineration fly ash, accounting for about 3-20% of the total weight of incinerated waste. After testing, the incineration fly ash contains a large amount of dioxins, heavy metals (Cd, Zn, Pb, etc.) and other substances harmful to human body, and is listed as one of the "hazardous wastes" ("National Hazardous Waste List" 2016 edition), and must be properly disposed of...

AI Technical Summary

Problems solved by technology

For example, the chelating agent method has the disadvantages of being ineffective against chlorides and dioxins, the total capture rate of heavy metals ranges from 60-90%, has high requirements for fly ash, and has disadvantages such as poor applicability

The cement curing method has the disadvantages of relatively large volume expansion, heavy metal leaching after weathering, and cracking caused by chloride dissolution.

At the same time, the capacity of my country's current hazardous waste landfills is limited, especially in large cities, it is difficult to meet the demand for fly ash landfill, and there is an urgent need to develop a new technology for the harmless and resourceful disposal of industrial-grade fly ash

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