Waste incineration fly ash treatment and recycling method and device

A waste incineration fly ash and recycling technology, applied in chemical instruments and methods, transportation and packaging, solid waste removal, etc., can solve the problems of high capacity increase ratio, large land occupation, etc., and achieve a high degree of harmlessness , easy to promote, and obvious effect of reduction

Inactive Publication Date: 2018-05-08
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly to send the solidified and stabilized fly ash to the landfill for landfill. This method has the disadvantage of high capacit

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  • Waste incineration fly ash treatment and recycling method and device

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Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a method for waste incineration fly ash treatment and resource utilization, which is carried out according to the following process:

[0041] Take 5000g of fly ash mixture (waste incineration fly ash) during normal operation of a certain waste incineration power plant in Wuhan, add halides of alkaline earth metals with 80% of the mass of the fly ash mixture as molten salt, heat in an electric furnace at 600°C, and melt at low temperature for 60min, A liquid product in the upper layer and a solid product in the lower layer were obtained.

[0042] Part of the upper liquid product is recycled as molten salt, and part of it is cooled as industrial salt raw material to prepare industrial salt; the lower solid product is mixed with coal powder, quartz sand, and anorthite and sent to the combustion furnace for high temperature melting at 1400°C. The volatilized secondary fly ash is collected, and the bottom slag is cooled and used as glass raw material...

Embodiment 2

[0045] This embodiment provides a method for waste incineration fly ash treatment and resource utilization, which is carried out according to the following process:

[0046] Take 5000g of fly ash mixture (waste incineration fly ash) during normal operation of a certain waste incineration power plant in Wuhan, add alkali metal nitrate with 75% of the quality of the fly ash mixture as molten salt, heat in an electric furnace at 550°C, and melt at low temperature for 80min. A liquid product in the upper layer and a solid product in the lower layer were obtained.

[0047] A part of the liquid product in the upper layer is recycled as molten salt, and a part is cooled to prepare polyvinyl chloride; the solid product in the lower layer is mixed with coke, anorthite, and quicklime and sent to the combustion furnace, where it is melted at a high temperature of 2000 ° C to capture the volatilized secondary fly Ash and bottom slag are used as glass raw materials to make glass drawing in...

Embodiment 3

[0050] This embodiment provides a method for waste incineration fly ash treatment and resource utilization, which is carried out according to the following process:

[0051] Take 5000g of fly ash mixture (waste incineration fly ash) at different periods during normal operation of a certain waste incineration power plant in Wuhan, add alkaline earth metal sulfate with 85% of the quality of the fly ash mixture as molten salt, heat in an electric furnace at 700°C, and melt at low temperature for 50min. A liquid product in the upper layer and a solid product in the lower layer were obtained.

[0052] Part of the liquid product in the upper layer is recycled as molten salt, and part of it is cooled to prepare molten salt; the solid product in the lower layer is mixed with fuel oil, quartz sand, and quicklime and sent to the furnace for melting at a high temperature of 3000°C to capture volatilized secondary fly ash. After cooling, the bottom slag is used as glass raw material to ma...

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Abstract

The invention relates to the field of hazardous waste treatment and recycling, in particular to a waste incineration fly ash treatment and recycling method and device. According to the waste incineration fly ash treatment and recycling method, waste incineration fly ash is mixed with fused salt, and low-temperature fusing is conducted for 20-120 min in the environment at the temperature of 400-900DEG C; lower-layer solid products are mixed with a mineral auxiliary material, high-temperature fusing is conducted in the environment at the temperature of 1000-5000 DEG C, and then a vitrified formis obtained. By the adoption of the waste incineration fly ash treatment and recycling method, permanent solidification of heavy metal is achieved, recycling is also achieved, and good market prospect and application value are achieved. A low-temperature fusion chlorine extracting unit of the waste incineration fly ash treatment and recycling device comprises a flying ash storage bin, a fused salt storage bin, a first stirring tank, a heating device, a fused salt storage bin and a flying ash storage bin are connected with a first stirring tank. The first stirring tank is connected with a heating device. A high-temperature fusion vitrification unit comprises a feeding device and a reactor, wherein the feeding device is connected with the reactor. According to the waste incineration fly ashtreatment and recycling method and device, equipment is easy and convenient to use, and popularization is easy.

Description

technical field [0001] The invention relates to the field of hazardous waste treatment and resource utilization, and in particular to a method and device for waste incineration fly ash treatment and resource utilization. Background technique [0002] In the field of waste disposal, the incineration method can maximize the overall goal of harmlessness, stabilization, reduction and resource utilization, and has become the main way to deal with municipal solid waste in many countries. However, in the process of domestic waste incineration, the fine particles collected by the flue gas purification device—the waste incineration fly ash is classified as hazardous waste because it contains a large amount of heavy metals, dissolved salts, and organic pollutants. [0003] Different countries have different regulations, standards and management policies on waste incineration fly ash treatment and disposal. Based on the national conditions of the country, different strategies for the ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B3/40
Inventor 邵雁朱文渊陈坤宋自新李社锋王文坦
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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