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Chelating agent for treating medical waste incineration fly ash and preparation method thereof

A technology for incinerating fly ash and medical waste, which is applied in the direction of protective devices against harmful chemicals, etc. It can solve the problems of inability to decompose or stabilize fly ash dioxins, and long time, so as to reduce the content and cost of heavy metals and dioxins Low, burden-reducing effect

Inactive Publication Date: 2021-01-05
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above technical solution reduces the amount of cement used for cement curing, it takes a long time for the two curing processes, and the curing process only targets the heavy metals in the fly ash, and cannot decompose or stabilize the dioxins in the fly ash

Method used

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  • Chelating agent for treating medical waste incineration fly ash and preparation method thereof
  • Chelating agent for treating medical waste incineration fly ash and preparation method thereof

Examples

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Embodiment 1

[0033] Such as figure 1 As shown, the present embodiment provides a method for preparing a chelating agent for processing medical waste waste incineration fly ash, comprising the following steps:

[0034] S1. Preparation of organic chelating agent: 10 parts of diethylenetriamine and 5 parts of dichloroethane are mixed and reacted to obtain macromolecular polyene polyamine, and macromolecular polyene polyamine is reacted with 5 parts of carbon disulfide under alkaline conditions. Get sodium dithioformate;

[0035] S2. Preparation of vanadium-based catalyst:

[0036] S21. Stir 5 parts of absolute ethanol, 5 parts of acetic acid and 10 parts of tetrabutyl titanate evenly to obtain solution 1;

[0037] S22. Put 10 parts of ammonium metavanadate solution in a mixed solution of deionized water and absolute ethanol, then add 2 parts of oxalic acid dropwise to the mixed solution while stirring to obtain solution 2;

[0038] S23. Add 5 parts of manganese acetate tetrahydrate and 10 ...

Embodiment 2

[0043] The present embodiment provides a kind of preparation method of chelating agent for processing medical waste waste incineration fly ash, comprising the following steps:

[0044] S1. Preparation of organic chelating agent: 10 parts of diethylenetriamine and 5 parts of dichloroethane are mixed and reacted to obtain macromolecular polyene polyamine, and macromolecular polyene polyamine is reacted with 5 parts of carbon disulfide under alkaline conditions. Get sodium dithioformate;

[0045] S2. Preparation of vanadium-based catalyst:

[0046] S21. Stir evenly 10 parts of absolute ethanol, 2 parts of acetic acid and 5 parts of tetrabutyl titanate to obtain a solution 1;

[0047] S22. Put 5 parts of ammonium metavanadate solution in a mixed solution of deionized water and absolute ethanol, then add 5 parts of oxalic acid dropwise to the mixed solution while stirring to obtain solution 2;

[0048] S23. Add 8 parts of manganese acetate tetrahydrate and 5 parts of copper nitra...

Embodiment 3

[0053] Referring to Example 1, this example differs from Example 1 in that the mass parts of each raw material in step S21 are as follows: absolute ethanol: 2 parts, acetic acid: 10 parts, tetrabutyl titanate 4 parts.

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Abstract

The invention discloses a chelating agent for treating medical waste incineration fly ash and a preparation method thereof, the chelating agent is composed of the following components by mass: 15-35 parts of an organic chelating agent, 5-15 parts of an inorganic chelating agent, and 10-20 parts of a vanadium-based catalyst, the organic chelating agent is sodium dithioformate, and the inorganic chelating agent is triple superphosphate. In the preparation process, the organic chelating agent and the vanadium-based catalyst can be separately prepared and then compounded, the preparation method issimple, and the preparation method is suitable for industrial popularization. The chelating agent for treating the medical waste incineration fly ash can react with heavy metal ions and dioxin to form a complex, and the effect of safely, rapidly and efficiently treating the medical waste incineration fly ash is achieved.

Description

technical field [0001] The invention relates to the technical field of medical waste treatment, in particular to a chelating agent for treating medical waste incineration fly ash and a preparation method thereof. Background technique [0002] Medical waste is a special kind of waste. Because it contains a large number of pathogens, such as bacteria, viruses, fungi, actinomycetes, mycoplasma, etc., medical waste is extremely infectious, biologically toxic and corrosive. Because it has the characteristics of space infection, acute infection, cross infection and latent infection, if it is not strictly managed and treated scientifically, it will easily cause harm to people's health and the social environment. At present, the main method used by centralized hazardous waste treatment centers in my country is high-temperature incineration. However, the fly ash produced after incineration of medical waste contains rich heavy metals and toxic persistent organic pollutants such as dio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/08A62D101/28A62D101/43
CPCA62D3/33A62D2101/08A62D2101/28A62D2101/43
Inventor 钟云飞王雪莲郑罗洁危怡璨牛梓屹
Owner HUNAN UNIV OF TECH
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