Plasma fly ash fusion treatment and metal recycling system

Abstract

The invention discloses a plasma bottom ash and fly ash fusion treatment and metal recycling system. The plasma bottom ash and fly ash fusion treatment and metal recycling system comprises a feeding device, a two-segment type ash fusion device, a combustion chamber, a wet type temperature reduction washing device, a demister, an activated carbon material layer and an induced draft fan. The feedingdevice is connected with the two-segment type ash fusion device. The two-segment type ash fusion device is connected with the combustion chamber. The combustion chamber is connected with the wet typetemperature reduction washing device. The wet type temperature reduction washing device is connected with the demister, and the demister is connected with the activated carbon material layer. The activated carbon material layer is connected with the induced draft fan. The two-segment type ash fusion device is adopted in the plasma bottom ash and fly ash fusion treatment and metal recycling system, harmless treatment of bottom ash and fly ash is achieved, and meanwhile alkali metal and heavy metal in the bottom ash and the fly ash and other metal reduced in a fusion furnace are recycled; through the combustion chamber, it is guaranteed that combustible components in smoke and other pollutants are sufficiently removed; and through the wet type temperature reduction washing device, capturingrecycling of the alkali metal, the heavy metal and other volatile salt substances and deep purification of smoke are achieved.

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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