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Treatment method of household garbage incineration fly ash

A technology of domestic waste incineration and treatment method, which is applied in the treatment field of domestic waste incineration fly ash, and can solve the problems of domestic waste incineration fly ash and danger.

Inactive Publication Date: 2021-07-06
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the leaching of heavy metals in fly ash can be effectively reduced by cement or asphalt solidification, it will increase the capacity of domestic waste incineration fly ash, and because cement and asphalt only mechanically solidify heavy metals, once the solidified body cracks, it is easy to cause potential danger

Method used

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  • Treatment method of household garbage incineration fly ash
  • Treatment method of household garbage incineration fly ash
  • Treatment method of household garbage incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present embodiment provides a processing method for domestic waste incineration fly ash, comprising the following steps:

[0043] Stirring and mixing: Weigh 90 g of domestic waste incineration fly ash and 10 g of silicon-aluminum conditioner, and perform full grinding, stirring, and mixing to obtain the first mixture. Wherein, the mass ratio of the abrasive used for grinding to the sum of the domestic waste incineration fly ash and the silicon-aluminum conditioner is 2:1, the grinding speed is 300-400 rpm, and the grinding time is 30 minutes to obtain the first mixture. Among them, the silicon-aluminum conditioner is metakaolin.

[0044] Alkali excitation: 30 g of an alkali activator was added to the first mixture, and the stirring was continued for 30 minutes to obtain a geopolymer. Among them, the alkali activator is prepared from sodium hydroxide and water glass solution (mass ratio: 12:100).

[0045] Molding and curing: Put the geopolymer into a stainless stee...

Embodiment 2

[0047] The present embodiment provides a processing method for domestic waste incineration fly ash, comprising the following steps:

[0048] Stirring and mixing: Weighing 90 g of domestic waste incineration fly ash and 10 g of metakaolin, fully grinding, stirring, and mixing to obtain the first mixture. Wherein, the mass ratio of the abrasive used for grinding to the sum of the domestic waste incineration fly ash and the silicon-aluminum conditioner is 2:1, the grinding speed is 300-400 rpm, and the grinding time is 30 minutes to obtain the first mixture. Among them, the silicon-aluminum conditioner is metakaolin.

[0049] Alkali excitation: 25 g of an alkali activator was added to the first mixture, and the stirring was continued for 30 minutes to obtain a geopolymer. Among them, the alkali activator is prepared from sodium hydroxide and water glass solution (mass ratio: 12:100).

[0050] Molding and maintenance: Put the geopolymer into a stainless steel mold, place it on a...

Embodiment 3

[0052] The present embodiment provides a processing method for domestic waste incineration fly ash, comprising the following steps:

[0053] Stirring and mixing: Weighing 90 g of domestic waste incineration fly ash and 10 g of metakaolin, fully grinding, stirring, and mixing to obtain the first mixture. Wherein, the mass ratio of the abrasive used for grinding to the sum of the domestic waste incineration fly ash and the silicon-aluminum conditioner is 2:1, the grinding speed is 300-400 rpm, and the grinding time is 30 minutes to obtain the first mixture. Among them, the silicon-aluminum conditioner is metakaolin.

[0054] Alkali excitation: 25 g of an alkali activator was added to the first mixture, and the stirring was continued for 30 minutes to obtain a geopolymer. Among them, the alkali activator is prepared from sodium hydroxide and water glass solution (mass ratio: 12:100).

[0055] Molding and maintenance: Put the geopolymer into a stainless steel mold, place it on a...

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Abstract

The invention relates to the field of waste resource utilization and environmental protection, and in particular relates to a treatment method of household garbage incineration fly ash. The treatment method comprises the steps of stirring and mixing, alkali excitation, forming and curing. The method specifically comprises the steps of stirring and mixing the household garbage incineration fly ash and a silicon-aluminum tempering agent according to a mass ratio of (80: 20) to (90: 10) to obtain a first mixture; then adding an alkali activator into the first mixture for reaction to obtain a geopolymer, wherein the mass of the alkali activator accounts for 25 to 35% of the sum of the mass of the household garbage incineration fly ash and the mass of the silicon-aluminum tempering agent; and finally, carrying out pressure forming and maintenance on the geopolymer to obtain a treated formed sample. According to the treatment method, volume reduction of the treated household garbage incineration fly ash is guaranteed, meanwhile, the heavy metal solidification effect is good, and the potential danger of heavy metal leaching is avoided.

Description

technical field [0001] The invention relates to the fields of resource utilization of waste and environmental protection, in particular to a method for processing fly ash from domestic waste incineration. Background technique [0002] Municipal solid waste incineration fly ash is included in the National Hazardous Waste List because it contains a large amount of heavy metals, and is classified as hazardous waste, which requires harmless treatment before it can be landfilled. In the related art, the curing treatment is usually performed by adding cement or asphalt. Although the leaching of heavy metals in fly ash can be effectively reduced by cement or asphalt solidification, it will increase the capacity of domestic waste incineration fly ash, and because cement and asphalt only mechanically solidify heavy metals, once the solidified body cracks, it is easy to cause Potentially dangerous. Contents of the invention [0003] The application discloses a treatment method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00C04B28/00C04B18/10
CPCC04B12/005C04B28/006C04B18/106C04B2201/50C04B14/106C04B18/0409C04B18/142C04B14/04C04B22/062C04B12/04Y02W30/91Y02P40/10
Inventor 张作泰魏炫坤颜枫郭睿诚
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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