Wide-temperature-section melting treatment device and method for waste incineration fly ash

Abstract

The invention provides a wide-temperature-section melting treatment device and method for waste incineration fly ash. The device comprises a kiln body, a kiln cover, a distributor and a discharge port, wherein the kiln body is sequentially provided with a preheating area, a melting area and a cooling area from top to bottom; the melting area is sequentially provided with a plurality of dividing layers from top to bottom; the kiln body is divided into a plurality of melting layers through the dividing layers; the dividing layers are additionally arranged in the kiln body, the staying time of the waste incineration fly ash in the melting area is prolonged, the contact range of the waste incineration fly ash and air is enlarged, and the waste incineration fly ash can be sufficiently melted; and under the high-temperature condition, in the melting state, heavy metal ions migrate into crystal lattices, stable chemical bonds are formed and solidified, the heavy metal leaching standard is met, and the treatment efficiency is improved. The waste incineration fly ash can be sufficiently melted and decomposed, emission of black smoke and harmful gas is greatly reduced, and the clean emissionstandard required by the ecological environment department is met.

Description

technical field [0001] The invention relates to the technical field of waste incineration fly ash treatment, in particular to a wide temperature range melting treatment device and method for waste incineration fly ash. Background technique [0002] With the development of society, people's quality of life is getting better and better, followed by a large amount of waste incineration fly ash. At present, there are two ways to deal with waste incineration fly ash: one is to use garbage Incineration fly ash landfill technology, however, with the gradual reduction of urban land, people are also looking for alternatives to waste incineration fly ash landfill technology; another way is to incinerate domestic waste incineration fly ash, domestic waste incineration fly ash A large amount of toxic gas is produced during incineration, and due to the wide variety of domestic waste incineration fly ash, the density, shape, chemical properties, and melting effects of the combustibles are...

AI Technical Summary

Problems solved by technology

[0003] The existing waste incineration fly ash treatment device needs to pretreat the fly ash (water washing). During the treatment process, it cannot continue due to the influence of the melting point and boiling point of chlorides, resulting in a high replacement rate of treatment equipment and low treatment efficiency; sintering Insufficient, harmful substances such as dioxins and chlorides in the processed product cannot be fully decomposed

Especially after the Ministry of Ecology and Environment issued and implemented the "Technical Specifications for Pollution Control of Domestic Waste Incineration Fly Ash (Trial)" (HJ 1134-2020) on August 27, 2020, the existing treatment methods can no longer meet the new environmental protection requirements

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