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A high-temperature melting harmless treatment process for waste incineration fly ash

A technology for waste incineration fly ash and harmless treatment, applied in incinerators, combustion types, combustion methods, etc., can solve the problems of restricting the harmless treatment of waste fly ash, high content of volatile elements, and high construction and operation costs. Achieve the effect of saving single incineration time, uniform density and small footprint

Active Publication Date: 2020-07-03
CHONGQING ANGRUIYUE SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) High content of volatile elements
The above treatment methods have problems such as large footprint, high construction and operation costs, and secondary pollution.
It can be seen that my country still lacks a mature and reliable garbage fly ash treatment technology, which limits the harmless treatment of garbage fly ash.

Method used

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  • A high-temperature melting harmless treatment process for waste incineration fly ash
  • A high-temperature melting harmless treatment process for waste incineration fly ash
  • A high-temperature melting harmless treatment process for waste incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ratio of test materials:

[0037] materials Garbage fly ash glass powder Slaked lime Biochar total FFH-180710-1 50 15 20 15 100％

[0038] The harmless treatment process includes the following steps: preparing garbage fly ash and glass powder under the action of a binder to form a fly ash ball core with a particle size of 3-6mm; and testing the physical performance indicators

[0039]

[0040] (2) Under the action of the binder, add slaked lime to the fly ash spherical core to coat the surface of the fly ash spherical core to obtain a fly ash composite pellet. The physical properties of the composite pellet are shown in the following table.

[0041] (3) Directly mix the fly ash composite pellets with the biomass charcoal evenly to obtain a mixture, wherein, after the preparation of the fly ash composite pellets is completed, a certain number of pellets are randomly selected to detect their moisture content and physical properties;

...

Embodiment 2

[0053] Ratio of test materials:

[0054] materials fly ash glass powder Slag Biochar total FFH-180710-2 50 20 15 15 100％

[0055] Harmless treatment process, said process comprises the following steps:

[0056] (1) preparing garbage fly ash and glass powder into fly ash spherical cores with a particle size of 3 to 6 mm under the action of a binder;

[0057]

[0058] (2) Under the action of the binder, add slag to the fly ash core to coat the surface of the fly ash core to obtain fly ash composite pellets. The physical properties of the composite pellets are shown in the following table.

[0059] (3) Directly mix the fly ash composite pellets with the biomass charcoal evenly to obtain a mixture, wherein, after the preparation of the fly ash composite pellets is completed, a certain number of pellets are randomly selected to detect their moisture content and physical properties;

[0060] The physical properties of fly ash composite pellets ...

Embodiment 3

[0072] Ratio of test materials:

[0073] materials Garbage fly ash glass powder Slaked lime Biochar total FFH-180730-1 60 18 10 12 100％

[0074] The same processing steps as in the examples were used for processing. The incinerated materials are tested by a third-party testing agency and meet national standards.

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Abstract

The invention relates to a garbage incineration fly ash high-temperature melting innocuous treatment process. The garbage incineration fly ash high-temperature melting innocuous treatment process comprises the steps that (1) garbage fly ash and glass powder are mixed to prepare fly ash ball cores; (2) fly ash composite pellets are obtained by adding slag to coat the surfaces of the ball cores; (3)the fly ash composite pellets are mixed with biomass carbon to obtain mixtures; and (4) the mixtures are directly accessed into an incineration device of an existing garbage incineration plant for high-temperature incineration, flue gas generated by incineration is purified by flue gas purification equipment of the garbage incineration plant, and incineration residue is subjected to residue treatment. According to the garbage incineration fly ash high-temperature melting innocuous treatment process, only the garbage fly ash and the glass powder are adopted to prepare the ball cores, the ballcores are coated with slag substances, and the obtained composite pellets are mixed with biomass carbon particles to form the mixtures, so that the ball forming process of the garbage fly ash is shortened and simplified, solid melting of heavy metals in the fly ash is facilitated, glass melts are formed, and leaching toxicity requirements are met; and meanwhile, the required equipment is less, andthe process is matched with the existing garbage incineration plant for implementation, so that nearby treatment of the garbage fly ash can be realized.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a harmless treatment process of garbage fly ash. Background technique [0002] At this stage, my country's domestic waste incineration is in a stage of rapid development, and various technologies have made great progress, but the treatment of waste fly ash is far from satisfactory, and has become the weakest link in the pollution control and risk management of the whole process of domestic waste incineration. On July 1, 2014, my country's new "Pollution Control Standards for Domestic Waste Incineration" was officially implemented, and the flue gas purification standards were further aligned with the international advanced level. The focus of controlling the "last mile" pollution of domestic waste incineration should turn to waste fly ash treatment Otherwise, it will plant a "time bomb" for my country's solid waste environmental management. [0003] The "...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G5/02F23G5/44F23J15/02
CPCF23G5/02F23G5/44F23G2201/701F23G2201/702F23J15/022
Inventor 李秉正李一吴汕
Owner CHONGQING ANGRUIYUE SCI & TECH
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