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Waste incineration fly ash heavy metal chelating agent and preparation process thereof

A technology of heavy metal chelating agent and waste incineration fly ash, which is applied in the direction of protection devices against harmful chemicals, etc., can solve problems such as environmental hazards and complex components of incineration fly ash, and achieve the effect of convenient operation and simple process

Inactive Publication Date: 2018-11-30
安徽安江环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic waste incineration fly ash has complex components, and the main pollutants are heavy metals with high leaching toxicity, which poses serious harm to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A heavy metal chelating agent for waste incineration fly ash, comprising the following components by weight percentage: 4% dithiotetraethylenepentacarbamate, 15% polycarboxylate water reducer, 60% deionized water, high polymer Flocculant 15%, hexamethylenetetramine 3% and propylene glycol monomethyl ether acetate 3%.

[0019] Wherein, dithiotetraethylenepentacarbamate is sodium dithiotetraethylenepentacarbamate.

[0020] Wherein, the polycarboxylate water reducer is an aqueous solution of a carboxyl group-containing dispersant with a mass percentage of 10%.

[0021] Among them, the polymer flocculant is polyacrylamide.

[0022] Wherein, the particle size of hexamethylenetetramine is 50-70um.

[0023] A preparation process of a waste incineration fly ash heavy metal chelating agent, comprising the steps of:

[0024] S01, placing hexamethylenetetramine, dithiotetraethylenepentacarbamate and polyacrylamide in deionized water and stirring evenly;

[0025] S02. Continue ...

Embodiment 2

[0027] A heavy metal chelating agent for waste incineration fly ash, comprising the following components by weight percentage: 3% dithiotetraethylenepentacarbamate, 10% polycarboxylate water reducer, 70% deionized water, high polymer Flocculant 10%, hexamethylenetetramine 4% and propylene glycol monomethyl ether acetate 3%.

[0028] Wherein, dithiotetraethylenepentacarbamate is sodium dithiotetraethylenepentacarbamate.

[0029] Wherein, the polycarboxylate water reducer is an aqueous solution of a carboxyl group-containing dispersant with a mass percentage of 10%.

[0030] Among them, the high polymer flocculant is polyferric chloride.

[0031] Wherein, the particle size of hexamethylenetetramine is 100-200um.

[0032] The preparation process is the same as in Example 1.

Embodiment 3

[0034] A heavy metal chelating agent for waste incineration fly ash, comprising the following components by weight percentage: 3% dithiotetraethylene pentacarbamate, 10% polycarboxylate water reducer, 55% deionized water, high polymer Flocculant 20%, hexamethylenetetramine 7% and propylene glycol monomethyl ether acetate 5%.

[0035] Wherein, dithiotetraethylenepentacarbamate is sodium dithiotetraethylenepentacarbamate.

[0036] Wherein, the polycarboxylate water reducer is an aqueous solution of a carboxyl group-containing dispersant with a mass percentage of 20%.

[0037] Among them, the polymer flocculant is a 1:1 mixture of polyacrylamide and polyferric chloride.

[0038] Wherein, the particle size of hexamethylenetetramine is 60-80um.

[0039] The preparation process is the same as in Example 1.

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Abstract

The invention discloses a waste incineration fly ash heavy metal chelating agent and a preparation process thereof, and relates to the technical field of preparation of chelating agents. The chelatingagent comprises, by weight, 3-5% of dithitetraethylene pentacarbamate, 10-15% of a polycarboxylate superplasticizer, 50-70% of deionized water, 10-20% of a polymeric flocculant, 2-10% of hexamethylene tetramine and 3-10% of acetoxy-1-methoxypropane. The chelating agent is prepared by reasonably combining various components and used for waste incineration fly ash treatment.

Description

technical field [0001] The invention belongs to the technical field of chelating agent preparation, in particular to a waste incineration fly ash heavy metal chelating agent and a preparation process thereof. Background technique [0002] Chelating agent, also known as complexing agent, is an organic or inorganic compound that can chelate with heavy metal ions to form a stable water-soluble complex, thereby deactivating heavy metal ions. Chelating agent molecules contain electron donors that can coordinate and combine with heavy metal ions, and have a series of special functions such as softening, descaling, rust prevention, stabilization, and synergism, so they are widely used in water treatment, textile printing and dyeing, papermaking, etc. technology field. The fly ash of domestic waste incineration has complex components, and the main pollutants are heavy metals with high leaching toxicity, which have serious harm to the environment. After testing, the fly ash of dome...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/43
Inventor 张期凯
Owner 安徽安江环保科技有限公司
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