A plasma fly ash melting treatment and metal recycling system

Abstract

The invention discloses a plasma bottom ash, fly ash melting treatment and metal recycling system, which includes a feeding device, a two-stage ash melting device, a combustion chamber, a wet-type temperature reduction washing device, a mist eliminator, an activated carbon material layer and induced draft fan; the feeding device is connected to the two-stage ash melting device; the two-stage ash melting device is connected to the combustion chamber; the combustion chamber is connected to the wet desuperheating washing device; the wet desuperheating washing device is connected to the demister, The demister is connected with the activated carbon material layer; the activated carbon material layer is connected with the induced draft fan. The invention adopts a two-stage ash melting device to realize the harmless treatment of bottom ash and fly ash, and at the same time recover the basic metals, heavy metals and other metals reduced in the melting furnace respectively in the bottom ash and fly ash; the combustion chamber It ensures the full removal of pollutants such as combustible components in the flue gas; the wet desuperheating scrubber realizes the capture and recovery of volatile salts such as alkaline metals and heavy metals and the deep purification of the flue gas.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a plasma bottom ash, fly ash melting treatment and metal recycling system. Background technique [0002] Domestic garbage and hazardous waste incineration are still the most widely used mature process technologies in industry. The large amount of fly ash produced therefrom must be properly treated because it is rich in organic pollutants such as heavy metals and dioxins. However, fly ash disposal is still very difficult in terms of technology and cost. It is a common practice to add chelating agent for curing to prevent the leaching of pollutants in fly ash. However, chelating and curing can only ensure that the leaching of fly ash does not exceed the standard within a certain period of time. In the long run, the harm to tap water and soil is still exist. [0003] The ash is transformed into a harmless glass body in the plasma ash melting furnace, the organic m...

AI Technical Summary

Problems solved by technology

A large amount of acid solution is consumed in the pickling process

[0004] Therefore, although the traditional plasma ash melting technology can effectively reduce the volume of fly ash and remove pollutants, this technology still consumes a lot of energy and water. As a low-value-added product output process system, the economic cost under market pressure

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