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Method for resource utilization of hazardous waste incineration bottom slag

A technology for incinerating bottom slag and hazardous waste, applied in combustion methods, incinerators, applications, etc., to achieve good economic benefits, relieve storage pressure, and reduce pollution.

Active Publication Date: 2016-12-14
南京天地环境污染防治研究院
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Problems solved by technology

According to the requirements of the "National Hazardous Waste List" (2016 edition), bottom slag produced during hazardous waste incineration, pyrolysis and other disposal processes is still included in hazardous waste management (waste category HW18, waste code 772-004-18). The slag is mainly disposed of in the way of safe landfill, and the huge amount of hazardous waste incineration bottom slag has caused increasing pressure on the storage capacity of hazardous waste landfills

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Examples

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Embodiment 1

[0028] A method for resource utilization of hazardous waste incineration bottom slag provided in this embodiment, the treatment process is as follows figure 1 shown, including the following steps:

[0029](1) Mix the bottom slag of hazardous waste incineration with clay, fly ash and zeolite to make a mixture; the amount of clay, fly ash and zeolite added is to control the SiO 2 +Al 2 o 3 Quality score 70%;

[0030] (2) Put the above mixed material into the electric arc furnace, and the mixed material is granular or powdery before entering the furnace;

[0031] (3) The electric arc furnace is heated up to 1500°C. During the heating process, charcoal powder is blown into the furnace to maintain a weak reducing atmosphere in the furnace until the mixture in the electric arc furnace is in a state of molten glass; during the melting process, lime is added to help the melting, and the amount of lime added is controlled. The alkalinity of slag is 1.0;

[0032] (4) After all the ...

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Abstract

The invention provides a method for resource utilization of hazardous waste incineration bottom slag. In order to solve the disposal problem of the hazardous waste incineration bottom slag, the common organic hazardous waste incineration bottom slag is used as a raw material, clay, coal ash, zeolite, shale, coal gangue and the like with SiO2 and Al2O3 as main ingredients are properly proportioned to serve as an auxiliary material, and a mixed material is formed; and an electric-arc furnace is adopted as a main reacting device for carrying out melting treatment on the mixed material, and finally-formed molten slag has high inertness and can be directly used as a firing raw material of multiple building materials. Poisonous and harmful substances, treated through the method, in the hazardous waste incineration bottom slag are further cured, environmental harm is reduced, the disposal problem of the hazardous waste incineration bottom slag is solved, resource utilization of the hazardous waste incineration bottom slag is achieved, and good environmental and social benefits are achieved.

Description

technical field [0001] The invention relates to a method for resource utilization of hazardous waste incineration bottom slag, in particular to a method for realizing resource utilization of dangerous waste incineration bottom slag by using an electric arc furnace to melt and process hazardous waste incineration bottom slag, belonging to the technical field of environmental protection. Background technique [0002] In 2015, my country's hazardous waste disposal volume reached 11.3 million tons, of which about 50% was incinerated, and the amount of hazardous waste incineration bottom residue generated was about 1.13 million tons. According to the requirements of the "National Hazardous Waste List" (2016 edition), bottom slag produced during hazardous waste incineration, pyrolysis and other disposal processes is still included in hazardous waste management (waste category HW18, waste code 772-004-18). The slag is mainly disposed of in a safe landfill, and the huge amount of ha...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23G5/10F23G5/44C04B33/135
CPCC04B33/1357F23G5/10F23G5/44F23G7/00F23G2202/20F23G2204/20Y02P40/60
Inventor 程涵张世达冯效毅
Owner 南京天地环境污染防治研究院
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