A Harmless Treatment Process for Garbage Fly Ash

A technology of harmless treatment and garbage fly ash, which is applied in the direction of combustion product treatment, incinerator, emission prevention, etc. It can solve the problems of unfavorable time and space saving, high content of volatile elements, and large equipment footprint. Achieve the effect of saving single incineration time, uniform density and small footprint

Active Publication Date: 2018-09-25
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
Although this process effectively solves the above problems, it needs to add chlorine absorbing agent and C-containing reducing agent or fusion additive before forming the core, and it needs to be balled again after pre-coating. The process is more complicated and cumbersome. It is not conducive to saving time and space, and the required equipment occupies a large area, so it is not suitable for construction in a waste incineration plant with a small open space

Method used

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  • A Harmless Treatment Process for Garbage Fly Ash
  • A Harmless Treatment Process for Garbage Fly Ash
  • A Harmless Treatment Process for Garbage Fly Ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ratio of test materials:

[0037]

[0038] A kind of harmless treatment process of garbage fly ash, said process comprises the following steps:

[0039] (1) Preparation of garbage fly ash under the action of a binder into a fly ash ball core with a particle size of 1 to 8 mm;

[0040] (2) Under the action of the adhesive, wrap the chlorine absorbing agent containing calcium oxide on the surface of the fly ash pellet core to form a 0.5-2mm chlorine absorbing shielding layer to obtain chlorine shielding pellets. For the physical properties of chlorine shielding pellets, see Table 1.

[0041] (3) Mix the chlorine-shielding pellets with the biomass charcoal with a moisture content of less than 5% and a particle size of 1-10 mm to obtain a mixture, wherein, after the preparation of the chlorine-shielding pellets is completed, a certain amount of pellets is randomly weighed Detect its water content and physical properties;

[0042] Table 1. The physical properties of chlo...

Embodiment 2

[0055] Ratio of test materials:

[0056]

[0057] A kind of harmless treatment process of garbage fly ash, said process comprises the following steps:

[0058] (1) Preparation of garbage fly ash under the action of a binder into a fly ash ball core with a particle size of 1 to 8 mm;

[0059] (2) Under the action of the adhesive, wrap the chlorine absorbing agent containing calcium oxide on the surface of the fly ash pellet core to form a 0.5-2mm chlorine absorbing shielding layer to obtain chlorine shielding pellets. For the physical properties of chlorine shielding pellets, see Table 2.

[0060] (3) Mix the chlorine-shielding pellets with the biomass charcoal with a moisture content of less than 5% and a particle size of 1-10 mm to obtain a mixture, wherein, after the preparation of the chlorine-shielding pellets is completed, a certain amount of pellets is randomly weighed Detect its water content and physical properties;

[0061] Table 2. The physical properties of ch...

Embodiment 3

[0073] Ratio of test materials:

[0074]

[0075] A kind of harmless treatment process of garbage fly ash, said process comprises the following steps:

[0076] (1) Preparation of garbage fly ash under the action of a binder into a fly ash ball core with a particle size of 1 to 8 mm;

[0077] (2) Under the action of the adhesive, wrap the chlorine absorbing agent containing calcium oxide on the surface of the fly ash pellet core to form a 0.5-2mm chlorine absorbing shielding layer to obtain chlorine shielding pellets. For the physical properties of chlorine shielding pellets, see table 3.

[0078] (3) Mix the chlorine-shielding pellets with the biomass charcoal with a moisture content of less than 5% and a particle size of 1-10 mm to obtain a mixture, wherein, after the preparation of the chlorine-shielding pellets is completed, a certain amount of pellets is randomly weighed Detect its water content and physical properties;

[0079] Table 3. The physical properties of ch...

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Abstract

The invention belongs to the technical field of solid waste treatment, and particularly relates to an innocent treatment process for waste flying ash. The innocent treatment process includes the following steps that (1) the waste flying ash is prepared into flying ash sphere kernels with the particle sizes being 1-8mm under the action of a binding agent; (2) a chlorine absorbing agent containing calcium oxide wraps the surfaces of the flying ash sphere kernels to form a chlorine absorbing shielding layer of 0.5-2mm under the action of the binding agent, and chlorine shielding pellets are obtained; (3) the chlorine shielding pellets are evenly mixed with a C-containing reducing agent with the particle sizes being 1-8mm, so that a mixture is obtained; and (4) the mixture is put into an incineration device for high-temperature incineration, flue gas generated through incineration is subjected to purification treatment, and incineration residues are subjected to residue treatment. The innocent treatment process is simple, time and labor are saved, equipment required in the process is also simple, and the floor area is small. The innocent treatment process is suitable for being matchedwith an existing waste incineration plant for implementation, and thus innocent treatment industrialization of the waste flying ash can be better realized.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a process for harmless treatment of garbage fly ash. Background technique [0002] At this stage, my country's domestic waste incineration has achieved rapid development and great progress, but the treatment of 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. The cases of disorderly stacking, non-standard treatment and utilization of fly ash frequently reported in the media also fully illustrate this point. 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 fly ash treatment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G5/02F23G5/00F23J15/02
CPCF23G5/004F23G5/02F23G2201/701F23G2203/105F23G2900/50206F23J15/02F23J2215/10F23J2215/20F23J2219/30
Inventor 李秉正李一吴汕
Owner CHONGQING ANGRUIYUE SCI & TECH
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