A waste incineration fly ash recycling system and method coupled with waste incineration

Abstract

The invention discloses a refuse incineration coupled refuse incineration flyash resource-converting treatment system and a method. The system can be used in a manner of being matched with existing various refuse incineration systems, firstly, flyash collected by a dust collector, an acid removing tower and an activated carbon adsorber of a refuse incineration plant is subjected to rinsing chlorine salt collecting under the condition of CO2 blistering and is dried by using refuse incineration fume, then, the alkalinity of the flyash is adjusted through additives, the flyash is granulated, flyash granules are conveyed into a plasma melting furnace, and flyash clinker is cooled in a cooling tank so as to obtain harmless granules; and flue gas of the plasma melting furnace is introduced intoa refuse incinerator for secondary treatment. According to the system and the method, the refuse incineration flyash treatment system and the refuse incineration system are efficiently combined, so that zero transportation cost is achieved, the phenomenon that the flyash is caked due to damping during transportation is solved, and the efficient recovery of heavy metals from refuse incineration flyash and the resource-converting treatment of the refuse incineration flyash are achieved.

Description

technical field [0001] The invention relates to waste incineration fly ash treatment, in particular to a waste incineration fly ash resource processing system and method coupled with waste incineration. Background technique [0002] With the rapid development of waste incineration and medical waste incineration, the output of waste incineration fly ash is increasing year by year. The latest 2016 edition of the "National Hazardous Waste List" includes domestic waste incineration fly ash as "HW18 Incineration Disposal Residue", that is, fly ash must be pretreated to stabilize heavy metals and dioxins in it before it can enter domestic waste filling buried. Therefore, the harmless resource treatment of waste incineration fly ash is imminent. [0003] At present, there are mainly three methods for processing waste incineration fly ash at home and abroad, including melting and sintering, separation and extraction, solidification and stabilization. Among them, melting and sinter...

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Problems solved by technology

[0004] (1) Waste incineration fly ash will cause secondary pollution during transportation, and the transportation cost is high

[0005] (2) Secondary fly ash will be produced in the process of plasma melting to treat waste incineration fly ash, so a separate flue gas treatment system is required

[0006] (3) The leaching effect of heavy metals in the washing process of waste incineration fly ash needs to be enhanced

[0007] (4) In the process of plasma melting treatment of waste incineration fly ash, there will be residual dioxins that need secondary treatment, which increases the investment in the early stage

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