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A solid waste incineration fly ash advanced oxidation and encapsulation fixation treatment method

A technology for incinerating fly ash and solid waste, applied in the field of environmental treatment, can solve the problems of inability to effectively deal with fly ash dioxin-like persistent organic pollutants, no large-scale use, and reduced mobility, and save landfill sites. Resource, Mobility Reduction, Toxicity Reduction Effects

Active Publication Date: 2021-12-03
斯蒂芬 Y 周
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings and defects of this method are: the solidification and stabilization technology is to wrap the heavy metal pollutants in the fly ash and reduce their mobility.
It is emphasized that none of the above methods can effectively deal with the dioxin-like persistent organic pollutants contained in fly ash
[0005] At present, solid waste incineration fly ash treatment technologies include heat treatment, hydrothermal treatment, biological extraction, etc., but due to high cost and difficult operation, none of them have been used on a large scale

Method used

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  • A solid waste incineration fly ash advanced oxidation and encapsulation fixation treatment method
  • A solid waste incineration fly ash advanced oxidation and encapsulation fixation treatment method
  • A solid waste incineration fly ash advanced oxidation and encapsulation fixation treatment method

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Embodiment 1

[0036] This embodiment provides a method for advanced oxidation and encapsulation and fixation of solid waste incineration fly ash. The method includes the following steps:

[0037] (1) Oxidation-reduction: the hydrogen peroxide that concentration is 35% is added the clear water dilution of 75% of described hydrogen peroxide weight, forms diluent; Said diluent is poured in the non-enclosed reaction container that solid waste incineration fly ash is housed , and then pour in the seaweed organic polymer oxidant, fully stir and react to form oxidized fly ash; the use of seaweed organic polymer oxidant breaks the ionic bond or covalent bond;

[0038] (2) Continuous oxidation: add seaweed organic polymer energy agent to the oxidized fly ash obtained in step (1), fully stir and react for 40 minutes, and stand for 90 minutes to form a reactant; seaweed organic polymer energy agent The use of small particles into large particles, forming new bonds, so that the stabilized heavy metals ...

Embodiment 2

[0042] This embodiment provides a method for advanced oxidation and encapsulation and fixation of medical waste incineration fly ash. The method includes the following steps:

[0043] (1) redox: concentration is 50% hydrogen peroxide is added the clear water dilution of 80% of described hydrogen peroxide weight, forms diluent; Said diluent is poured in the non-closed reaction vessel that waste incineration fly ash is housed, Pour in the seaweed organic polymer oxidant, fully stir and react to form oxidized fly ash; the use of seaweed organic polymer oxidant breaks ionic bonds or covalent bonds; 40% of the ash volume; the addition of the seaweed organic polymer oxidation energy agent is 5% of the volume of the waste incineration fly ash; the stirring time is 30 minutes; the preparation method of the seaweed organic polymer oxidant is: Stir the deep-sea seaweed to break it, then add 35% concentrated sulfuric acid to acidify it; then use 35% sodium hydroxide to leach and filter t...

Embodiment 3

[0048] like figure 1 As shown, this embodiment provides a method for advanced oxidation and encapsulation and fixation of domestic waste incineration fly ash. The method includes the following steps:

[0049] (1) Oxidation-reduction: the hydrogen peroxide (hydrogen peroxide) that concentration is 50% is added the clear water dilution of 80% of described hydrogen peroxide weight, forms dilution; In the type reaction vessel, pour the seaweed organic polymer oxidant into, fully stir and react, and form oxidized fly ash; the use of the seaweed organic polymer oxidant breaks the ionic bond or covalent bond; the addition amount of the diluent is 20% of the volume of the waste incineration fly ash; the addition of the seaweed organic polymer oxidation energy agent is 1% of the volume of the waste incineration fly ash; the stirring time is 45 minutes; the seaweed organic polymer oxidant The preparation method is as follows: stir the deep-sea seaweed to break it, then add 35% concentr...

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Abstract

The invention relates to a high-level oxidation, encapsulation and fixing treatment method of solid waste incineration fly ash, which is a harmless treatment method of solid waste incineration fly ash. The method uses seaweed organic polymer oxidant, seaweed organic polymer energy agent, seaweed organic polymer curing agent and hydrogen peroxide and other reagents to reduce the toxicity of heavy metals in fly ash and degrade fly ash through the main steps of redox, continuous oxidation, curing and encapsulation. Dioxin-like persistent organic pollutants in ash. Beneficial effects of the present invention: the treatment method of the present invention can reduce the toxicity of heavy metals in fly ash, degrade volatile organic compounds (VOC) in fly ash, and degrade dioxin-like persistent organic pollutants in fly ash.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to a treatment method for high-level oxidation, encapsulation and fixation of solid waste incineration fly ash. Background technique [0002] Solid waste incineration fly ash refers to fine particles collected and assembled by various solid waste incineration flue gas purification systems such as domestic garbage, industrial waste or medical waste. The higher the purification level of flue gas from solid waste incineration, the higher the content of fly ash pollutants captured by the purification system. my country's waste incineration technology has developed rapidly, and flue gas purification technology has continued to improve, but the captured fly ash treatment technology has become a relatively weak link in pollution control and risk control in the process of waste incineration. [0003] my country's solid waste incineration fly ash has the characte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
CPCB09B3/21B09B2101/30
Inventor 斯蒂芬·Y·周刘国选
Owner 斯蒂芬 Y 周
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