Multi-component composite chelating agent for fly ash treatment and preparation method thereof

A composite chelating agent and multi-composite technology, which is applied in the field of waste incineration fly ash treatment, can solve the problems of incomplete chelating performance, poor dispersibility, poor stability, and single chelating performance of the composite chelating agent, and achieve high-efficiency stabilization of heavy metal ions, Good dispersion, good chelating effect

Inactive Publication Date: 2020-09-04
SICHUAN JIUDINGZHIYUAN INTPROP OPERATIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a ternary composite organic-inorganic compound for the problems of single chelating performance of existing inorganic / organic chelating agents, incomplete chelating performance of compound chelating agents, and poor dispersion and stability of chelating agents. Chelating agent, the invention can significantly improve the uniform stability of the complex chelating agent by adding an organic low-molecular-weight dispersant, has good dispersibility, can form a homogeneous liquid product, and has no precipitation and solid generation, thereby strengthening the overall chelation of the chelating agent performance

Method used

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  • Multi-component composite chelating agent for fly ash treatment and preparation method thereof
  • Multi-component composite chelating agent for fly ash treatment and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A kind of preparation method of multiple compound chelating agent, comprises the following steps:

[0029] S1, add 50g of sodium dimethyl dithiocarbamate into 50g of water, stir until completely dissolved and filtered to obtain a clear solution;

[0030] S2, add 15g sodium thiosulfate to clear solution, stir until sodium thiosulfate dissolves completely, must mix clear solution;

[0031] S3, add 30g polyacrylic acid amine (molecular weight is lower than 2000) in mixed clarified solution, after stirring, add 10g disodium hydrogen phosphate, after fully stirring again, promptly obtain multi-element compound chelating agent.

Embodiment 2

[0033] The preparation method of embodiment 2 is identical with embodiment 1, and its difference is, the prescription of multi-element complex chelating agent is: sodium dimethyl dithiocarbamate 35.0g, disodium hydrogen phosphate 5g, sodium thiosulfate 5g, poly Acrylamine 15g, water 50.0g.

Embodiment 3

[0035] The preparation method of embodiment 3 is identical with embodiment 1, and its difference is, the prescription of multiple compound chelating agent is: sodium dimethyl dithiocarbamate 49.5g, disodium hydrogen phosphate 10.0g, sodium thiosulfate 15.2g , polyacrylamide 28g, water 50.0g.

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Abstract

The invention discloses a multi-component composite chelating agent for fly ash treatment. The multi-component composite chelating agent comprises the following components in percentage by mass: 10-60% of organic sulfide, 1-30% of inorganic sulfide, 1-20% of inorganic phosphate and 1-30% of an organic low-molecular-weight dispersing agent, with the balance being water. The invention provides the heavy metal composite chelating agent for waste incineration fly ash. The chelating agent is simple in preparation method; the composition of the agent is simple and easy to obtain; the chelating agentis comprehensive in component, is homogeneous and stable, can effectively stabilize almost all heavy metal ions in the fly ash for a long time, and allows the fly ash to reach standards for standardlandfill; the purpose of efficiently stabilizing heavy metal ions can be achieved by adopting a small amount of the chelating agent; and the chelating agent has the advantage of high cost performance.

Description

technical field [0001] The invention relates to the technical field of waste incineration fly ash treatment, in particular to a multi-component composite chelating agent for fly ash treatment and a preparation method thereof. Background technique [0002] Incineration, as a waste treatment process with obvious reduction effect, has been widely used. During the incineration process of domestic waste, a large amount of fly ash will be produced. The total amount of heavy metals in the waste cannot be changed by incineration. The fly ash generated by combustion contains most of the heavy metals and harmful substances in the waste. Therefore, fly ash is defined as hazardous waste by most countries in the world. The research on harmless treatment technology of incineration fly ash has become a major topic in the field of solid waste pollution control. [0003] Solidification technology uses certain technical methods to make the toxic substances in fly ash chemically inert and re...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/43
CPCA62D3/33A62D2101/43
Inventor 丁伟
Owner SICHUAN JIUDINGZHIYUAN INTPROP OPERATIONS CO LTD
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