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A kind of waste incineration fly ash stabilizer and its processing technology

A waste incineration fly ash and processing technology, which is applied in the field of fly ash stabilizers, can solve the problems of acid-base sensitivity of the stabilization system, large dosage, and unstable stabilization effect of heavy metals in fly ash, so as to achieve stable material state and reduce sensitivity Sex, reduce the effect of leaching toxicity

Active Publication Date: 2022-06-28
同碧(上海)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

However, some existing organic fly ash stabilization agents are used in large amounts, are sensitive to the acidity and alkalinity of the stabilization system, and have unstable effects on the stabilization of heavy metals in fly ash.

Method used

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  • A kind of waste incineration fly ash stabilizer and its processing technology
  • A kind of waste incineration fly ash stabilizer and its processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take phytic acid, add glycidyl methacrylate and mix, pass nitrogen, add deionized water and potassium persulfate, stir and mix in nitrogen atmosphere, adjust the temperature of the system to 70 ° C, react for 7 hours, wash, and dry to obtain product A ; wherein the mass ratio of phytic acid and glycidyl methacrylate is 10:9.0;

[0028] Take product A, add methanol and mix, pass nitrogen, adjust the temperature of the system to 1 °C, in a nitrogen atmosphere, add ethylenediamine and trimethylolpropane triacrylate in turn, keep the temperature of the system at 1 °C, and under dark conditions The reaction was carried out for 72h, followed by distillation under reduced pressure. The process conditions were as follows: the temperature was 80°C and the pressure was 0.08MPa until the product had a constant weight to obtain product B; wherein the mass ratio of product A, ethylenediamine and trimethylolpropane triacrylate was 1.3 :1.8:1.0;

[0029] Mix 1-(3-dimethylaminopropyl)...

Embodiment 2

[0031] Take phytic acid, add glycidyl methacrylate and mix, pass nitrogen, add deionized water and potassium persulfate, stir and mix in nitrogen atmosphere, adjust the temperature of the system to 75°C, react for 7.5h, wash, and dry to obtain the product A; wherein the mass ratio of phytic acid and glycidyl methacrylate is 10:11.2;

[0032] Take product A, add methanol and mix, pass nitrogen, adjust the temperature of the system to 0 °C, in a nitrogen atmosphere, add ethylenediamine and trimethylolpropane triacrylate in turn, keep the temperature of the system at 0 °C, and under dark conditions The reaction was carried out for 75h, followed by distillation under reduced pressure. The process conditions were as follows: the temperature was 82°C and the pressure was 0.09MPa until the product had a constant weight to obtain product B; wherein the mass ratio of product A, ethylenediamine and trimethylolpropane triacrylate was 1.8 :2.4:1.7;

[0033] Mix 1-(3-dimethylaminopropyl)-...

Embodiment 3

[0035] Take phytic acid, add glycidyl methacrylate and mix, pass nitrogen, add deionized water and potassium persulfate, stir and mix in nitrogen atmosphere, adjust the temperature of the system to 80 ° C, react for 8 hours, wash, and dry to obtain product A ; Wherein the mass ratio of phytic acid and glycidyl methacrylate is 10:13.5;

[0036] Take product A, add methanol and mix, pass nitrogen, adjust the temperature of the system to 0 °C, in a nitrogen atmosphere, add ethylenediamine and trimethylolpropane triacrylate in turn, keep the temperature of the system at 0 °C, and under dark conditions The reaction was carried out for 80h, followed by distillation under reduced pressure. The process conditions were as follows: the temperature was 85°C and the pressure was 0.10MPa until the product had a constant weight to obtain product B; wherein the mass ratio of product A, ethylenediamine and trimethylolpropane triacrylate was 2.4 :3.0:2.5;

[0037] Mix 1-(3-dimethylaminopropyl)-...

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Abstract

The invention discloses a waste incineration fly ash stabilizer and its processing technology, which includes the following preparation steps: taking phytic acid and glycidyl methacrylate to react to obtain product A; taking product A, ethylenediamine, and trimethylol React propane triacrylate to obtain product B; react product B with thiourea to obtain a stabilizer. In the present invention, phytic acid and glycidyl methacrylate are used to obtain double bonds; then they are copolymerized with ethylenediamine and trimethylolpropane triacrylate, and grafted with thiourea to prepare a polymer compound with a cross-linked network ; The many functional groups in this stabilizer can combine with heavy metals in fly ash. Its dendritic network structure and the functional groups in the branches increase the capture strength of the stabilizer for heavy metals in fly ash, effectively reduce the leaching toxicity of heavy metals, and improve stability. The agent has a stabilizing effect on fly ash; it can also reduce the sensitivity of the stabilized fly ash to strong acids and alkalis, making it adaptable to the pH environment of the landfill and improving environmental safety.

Description

Technical field [0001] The invention relates to the technical field of fly ash stabilizers, specifically a waste incineration fly ash stabilizer and its processing technology. Background technique [0002] We call waste items that have lost their use value and cannot be used as garbage, which is an important link in the material cycle. People will produce a large amount of garbage in their production and life. These large volumes and quantities of garbage will squeeze people's living space, pollute soil, water resources and other environments, causing great harm and need to be dealt with. Common garbage disposal methods are to collect and send them to landfill areas for landfill, or to burn them in incinerators. Waste incineration has the advantages of reduction, harmlessness, and resource utilization. It is widely used in China and is currently an effective technical means to alleviate and solve the dilemma of urban waste disposal at home and abroad. However, during the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/33C08F8/34C08F8/32C08F230/02C08F222/14A62D101/43A62D101/08
CPCA62D3/33C08F8/34A62D2101/43A62D2101/08C08F8/32C08F230/02C08F222/103
Inventor 吴长淋金德勇
Owner 同碧(上海)环保科技有限公司
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