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A waste incineration fly ash treatment agent

A waste incineration fly ash and chemical treatment technology, which is applied in the field of waste incineration fly ash treatment, can solve the problems of poor treatment effect of high heavy metal fly ash, and achieve the effect of low treatment cost, price advantage, and enhanced capture efficiency

Active Publication Date: 2015-12-23
SHENZHEN ENERGY ENVIRONMENT ENG
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Problems solved by technology

[0005] In order to solve the problem that the harmless treatment of fly ash by using chelating agents including phosphate is poor for the treatment of high heavy metal fly ash

Method used

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  • A waste incineration fly ash treatment agent
  • A waste incineration fly ash treatment agent

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Embodiment Construction

[0014] A garbage incineration fly ash treatment agent, which contains the following components by weight: 20%-60% activating component (Activation), 15%-50% composite phosphate component (CompositePhosphate), 20%-50% solidified molding component ( Solidification), 1%-5% auxiliary ingredients;

[0015] The activation component (Activation) contains the following components by weight: 40%-70% Ca(OH) 2 , 20%-50% baking soda, 10%-30% baking soda;

[0016] The composite phosphate component (CompositePhosphate) contains the following components by weight: 70%-90% sodium dihydrogen phosphate or sodium phosphate, 10%-30% sodium thiosulfate;

[0017] The solidification molding component (Solidification) is Portland cement;

[0018] The auxiliary components contain the following components by weight: 20%-40% conventional dyeing agent, 60%-80% desiccant.

[0019] figure 1 It is a process flow chart of using the APS fly ash treatment harmless agent proposed by the present invention to...

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Abstract

In order to solve the problem that the method of using chelating agents including phosphates to harmlessly process fly ash has a bad effect on fly ash with a high heavy metal content, disclosed in the present invention is a reagent for processing fly ash whilst incinerating waste, which uses the combined action of an activation and a composite phosphate, wherein the activation decreases the reactivity of the calcium ion and the magnesium ion by activating the reactivity of heavy metal ions during the process so that the composite phosphate can fully react with the heavy metal ions, thus greatly enhancing the heavy metal capturing efficiency of the composite phosphate. The reagent for processing fly ash during incinerating waste provided by the present invention comprises the following ingredients by weight: 20%-60% of an activation (Activation), 15%-50% of a composite phosphate (Composite Phosphate), 20%-50% of a solidification (Solidification) and 1%-5% of an auxiliary ingredient. The composite phosphate is formed by mixing multiple compounds containing phosphorus including a phosphate, a dihydric phosphate, etc. The composite phosphate acts together with the activation, which not only improves the heavy metal capturing efficiency, but also has the advantage of low cost.

Description

technical field [0001] The invention relates to a waste incineration fly ash treatment technology, in particular to a waste incineration fly ash treatment agent. Background technique [0002] The fly ash produced by waste incineration is a kind of hazardous waste, which contains heavy metals such as lead, cadmium, mercury, chromium and persistent organic pollutants such as dioxin, which is extremely harmful to human health and the environment. Therefore, proper disposal of fly ash is of great significance for protecting the health of citizens and promoting sustainable economic development. [0003] At present, foreign fly ash disposal mainly adopts landfill and harmless treatment. The harmless treatment method also includes chemical treatment method and melting method. Domestic fly ash treatment technology is still in its infancy, and most of them refer to foreign methods of adding chelating agents for fly ash harmless treatment. This process has an obvious effect on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/24A62D2101/43
Inventor 赵晓峰吴燕琦杨蕾谷钰刘红
Owner SHENZHEN ENERGY ENVIRONMENT ENG
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