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,

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A preparation method of a multi-component chelating agent includes the following steps:

[0029] S1. Add 50g of sodium dimethyldithiocarbamate to 50g of water, stir to completely dissolve and filter to obtain a clear solution;

[0030] S2. Add 15g of sodium thiosulfate to the clear solution and stir until the sodium thiosulfate is completely dissolved to obtain a mixed clear solution;

[0031] S3. Add 30 g of polyacrylamide (molecular weight less than 2000) to the mixed clear solution, add 10 g of disodium hydrogen phosphate after stirring, and then fully stir to obtain a multi-component complex chelating agent.

Example Embodiment

[0032] Example 2

[0033] The preparation method of Example 2 is the same as that of Example 1, but the difference is that the formula of the multi-element complex chelating agent is: 35.0g sodium dimethyldithiocarbamate, 5g disodium hydrogen phosphate, 5g sodium thiosulfate, poly Acrylic amine 15g, water 50.0g.

Example Embodiment

[0034] Example 3

[0035] The preparation method of Example 3 is the same as that of Example 1, but the difference is that the formula of the multi-component complex chelating agent is: 49.5g sodium dimethyldithiocarbamate, 10.0g disodium hydrogen phosphate, 15.2g sodium thiosulfate , 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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