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Garbage incineration fly ash treatment chelating agent

A technology of waste incineration fly ash and chelating agent, which is applied in the direction of protection devices against harmful chemicals, can solve the problems of difficult natural degradation of heavy metals, increased heavy metal pollution, environmental impact, etc., and achieves low processing cost, short reaction time, and operation handy effect

Inactive Publication Date: 2018-12-18
江苏乐尔环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Garbage incinerators will increase the heavy metal pollution in the atmosphere in the surrounding area by about 20%
Since heavy metals in waste incineration fly ash are difficult to degrade naturally, their impact on the environment is very serious

Method used

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  • Garbage incineration fly ash treatment chelating agent
  • Garbage incineration fly ash treatment chelating agent
  • Garbage incineration fly ash treatment chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A chelating agent for waste incineration fly ash, comprising the following components in parts by weight: 50 parts of sodium dimethyl dithiocarbamate; 30 parts of a mixture of dithiocarbamic acid and dithiocarbamate; 20 parts of compound phosphate share.

[0023] Further, dithiocarbamic acid and dithiocarbamate are made of polyolefin polyamine and CS 2 Generated under alkaline conditions, where polyolefin polyamines include ethylenediamine and diethylenetriamine.

[0024] Further, the compound phosphate is any of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, sodium acid pyrophosphate, disodium dihydrogen pyrophosphate A combination of the two.

[0025] Further, when used, the chelating agent is mixed with the curing molding component, fly ash, and water in any proportion, and the curing component is Portland cement.

Embodiment 2

[0027] A chelating agent for waste incineration fly ash, comprising the following components in parts by weight: 50 parts of sodium dimethyl dithiocarbamate; 40 parts of a mixture of dithiocarbamic acid and dithiocarbamate; 30 parts of compound phosphate share.

[0028] Further, dithiocarbamic acid and dithiocarbamate are made of polyolefin polyamine and CS 2 Generated under alkaline conditions, where polyolefin polyamines include ethylenediamine and diethylenetriamine.

[0029] Further, the compound phosphate is any of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, sodium acid pyrophosphate, disodium dihydrogen pyrophosphate A combination of the two.

[0030] Further, when used, the chelating agent is mixed with the curing molding component, fly ash, and water in any proportion, and the curing component is Portland cement.

Embodiment 3

[0032] A chelating agent for waste incineration fly ash, comprising the following components in parts by weight: 50 parts of sodium dimethyl dithiocarbamate; 35 parts of a mixture of dithiocarbamic acid and dithiocarbamate; 25 parts of compound phosphate share.

[0033] Further, dithiocarbamic acid and dithiocarbamate are made of polyolefin polyamine and CS 2 Generated under alkaline conditions, where polyolefin polyamines include ethylenediamine and diethylenetriamine.

[0034] Further, the compound phosphate is any of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, sodium acid pyrophosphate, disodium dihydrogen pyrophosphate A combination of the two.

[0035] Further, when used, the chelating agent is mixed with the curing molding component, fly ash, and water in any proportion, and the curing component is Portland cement.

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Abstract

The invention discloses a composite chelating agent for treating garbage incineration fly ash, and cured products reach the related landfill standard. The composite chelating agent comprises followingcomponents including, by weight, 50-60 parts of dimethyl carbamodithioic acid, 30-40 parts of the aminodithioformic acid and dithiocarbamate mixture and 20-30 parts of composite phosphate. Aminodithioformic acid and dithiocarbamate are generated through polyolefin polyamine and CS2 under the alkali condition, wherein the polyolefin polyamine comprises ethidene diamine and diethylenetriamine. Thecomposite phosphate is the combination of any two of sodium tripolyphosphate, sodium hexametaphosphate, sodium pyrophosphate, trisodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, sodium acid pyrophosphate and disodium dihydrogen pyrophosphate. During usage, the chelating agent is mixed with a component formed through curing, fly ash and water with any proportion, and thecured component is portland cement. The composite chelating agent can adapt to wide temperature and PH value usage ranges and is slightly influenced by the heavy metal ion concentration and other complex compounds.

Description

technical field [0001] The invention relates to a chelating agent, in particular to a chelating agent for waste incineration fly ash treatment. Background technique [0002] Garbage fly ash is the material collected by waste incineration power generation enterprises in waste heat recovery and utilization systems and flue gas purification systems. The amount of fly ash produced is related to the type of garbage, incineration conditions, type of incinerator and flue gas treatment process. Generally, the fly ash of the grate furnace process accounts for about 3% to 5% of the amount of garbage incinerated. The analysis shows that waste incineration fly ash is not a chemically inert substance, and contains various harmful heavy metals and salts such as Cd, Pb, Zn, Cr, etc., which can be leached. If not handled properly, heavy metals will migrate and pollute groundwater and soil and air. Garbage incinerators will increase the heavy metal pollution in the atmosphere in the surrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/43
Inventor 徐亚军
Owner 江苏乐尔环境科技股份有限公司
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