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Household garbage incineration fly ash resource utilization process based on carbon neutralization

A technology of domestic waste incineration and carbon neutralization, which is applied in the field of resource utilization of domestic waste incineration fly ash to achieve the effect of reducing the total amount of carbon dioxide, realizing the purchase volume and reducing carbon emissions

Inactive Publication Date: 2021-10-08
JIANGSU RUIDA TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a resource utilization process of domestic waste incineration fly ash based on carbon neutralization, which solves the problem that the processing method of domestic waste incineration fly ash needs to be improved in the prior art

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  • Household garbage incineration fly ash resource utilization process based on carbon neutralization

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Embodiment 1

[0024] refer to figure 1 , a process for resource utilization of domestic waste incineration fly ash based on carbon neutrality, comprising the following steps:

[0025] The first step is to mix and stir the domestic waste incineration fly ash and water, the salt in the fly ash is dissolved in the water, the fly ash aggregate is precipitated, and then the solid and liquid are separated to obtain the aggregate and fly ash filtrate respectively, and the domestic waste incineration fly ash and The ratio of water is 1:10~1:5;

[0026] In the second step, pass the flue gas containing carbon dioxide into the fly ash filtrate to soften the total hardness in the fly ash filtrate, and add sodium hydroxide dropwise. The amount of sodium hydroxide added is 3% to 5% of the fly ash filtrate , and then solid-liquid separation to obtain calcium carbonate and magnesium carbonate desulfurizers, and softened filtrate; wherein the obtained calcium carbonate content is 91% to 93%, and the magnes...

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Abstract

The invention relates to the technical field of household garbage incineration fly ash treatment processes, in particular to a household garbage incineration fly ash resource utilization process based on carbon neutralization, and solves the problem that in the prior art, a household garbage incineration fly ash treatment mode needs to be better improved. The household garbage incineration fly ash resource utilization process based on carbon neutralization comprises the following steps that firstly, household garbage incineration fly ash and water are mixed and stirred, salt in the fly ash is dissolved in the water, fly ash aggregate is precipitated, then solid-liquid separation is conducted, and aggregate and fly ash filtrate are obtained. According to the process, the household garbage incineration fly ash and flue gas are subjected to resource utilization, so that the purchase amount of a desulfurizing agent and the yield of hazardous wastes are reduced, hardness removal and softening of washing water are realized, meanwhile, the total amount of carbon dioxide generated in the using process of the desulfurizing agent taking calcium carbonate as a main body is reduced, and the practicability and usability of the treatment process are greatly improved.

Description

technical field [0001] The invention relates to the technical field of domestic waste incineration fly ash treatment technology, in particular to a process for resource utilization of domestic waste incineration fly ash based on carbon neutralization. Background technique [0002] With the implementation of standards such as "Standards for Hazardous Waste Landfill Pollution Control" (GB 18598-2019) and "Technical Specifications for Pollution Control of Domestic Waste Incineration Fly Ash (Trial)" (HJ 1134-2020), domestic waste as hazardous waste Because of its high soluble content, incineration fly ash should not be sent to flexible landfill through simple stabilization treatment. Waste incineration fly ash is a potential resource that exists in large quantities, and its resource utilization is attracting the attention of many people; [0003] The current harmless and resourceful disposal processes for fly ash from domestic waste incineration are mainly melting technology, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 钟庆周乔马晨皓赵炯邱丽娟郗静代罡蒋新娣
Owner JIANGSU RUIDA TECH CO LTD