Bed layer material for melting waste incineration fly ash, preparation technology and treatment method

A technology for waste incineration fly ash and preparation process, which is applied in the field of environmental engineering, can solve the problems of high difficulty and cost of secondary pollution operation, high equipment cost, high process energy consumption, etc., and achieves easy large-scale industrial production and application. The effect of low curing rate and melting point

Inactive Publication Date: 2019-08-16
BEIJING ENVIRONMENT ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The advantages of melting processing are high weight reduction, large volume reduction ratio, thorough digestion of organic pollutants, and reliable stabilization and solidification of heavy metals; the disadvantages are high process energy consumption, high equipment costs, heavy metals are easy to form secondary pollution, and it is difficult to eliminate secondary pollution. and costly

Method used

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  • Bed layer material for melting waste incineration fly ash, preparation technology and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The fly ash in this example was taken from the SDA desulfurization tower and bag filter of a waste incineration plant in Beijing, and was analyzed by X-ray fluorescence spectrometer. The basic components are shown in Table 1.

[0037] Table 1 Basic composition (mass fraction) of fly ash %

[0038] CaO SiO 2

Cl S al 2 o 3

C H MgO Fe 2 o 3

36.80 8.42 24.69 3.62 3.01 3.24 0.33 2.33 1.07

[0039] The flux consists of TiO with a weight ratio of 0.2:0.3:0.1:0.2 2 , MgO, B 2 o 3 , CaF 2 Mix made.

[0040] The preparation process of the bed material for the melting of waste incineration fly ash in this embodiment comprises the following steps:

[0041] (1) Raw material pretreatment

[0042] The fly ash and flux are crushed separately, and the particle size of each component after crushing is 100-120 mesh;

[0043] (2) Raw material ratio

[0044] Mix the crushed fly ash, silica sand, quicklime, flux, bentonite, coal po...

Embodiment 2

[0048] The composition of the fly ash in this example is the same as that in Example 1.

[0049] The flux consists of TiO with a weight ratio of 0.3:0.1:0.2:0.1 2 , MgO, Borax, CaF 2 Mix made.

[0050] The preparation process of the bed material for the melting of waste incineration fly ash in this embodiment comprises the following steps:

[0051] (1) Raw material pretreatment

[0052] Fly ash, waste glass, soda ash, flux, sodium metasilicate, and charcoal are crushed separately, and the particle size of each component after crushing is 60-80 mesh;

[0053] (2) Raw material ratio

[0054]Mix the crushed fly ash, waste glass, soda ash, flux, sodium metasilicate, charcoal, and leachate according to the weight ratio of 0.74:0.11:0.06:0.04:0.03:0.02:0.07, and stir evenly to make mud ;

[0055] (3) extrusion molding

[0056] The mud is introduced into a granulation molding machine for extrusion molding. The extrusion molding pressure is 1.0 MPa. After cooling and sieving, a...

Embodiment 3

[0058] The fly ash in this example was taken from the SDA desulfurization tower and bag filter of a waste incineration plant in Beijing, and was analyzed by X-ray fluorescence spectrometer. The basic components are shown in Table 2.

[0059] Table 2 Basic composition (mass fraction) of fly ash %

[0060] CaO SiO 2

Cl S al 2 o 3

C H MgO Fe 2 o 3

36.40 8.19 23.16 3.55 2.97 3.26 0.28 2.44 0.97

[0061] The flux consists of TiO with a weight ratio of 0.2:0.2:0.1:0.2 2 , MgO, B 2 o 3 , CaF 2 Mix made.

[0062] The preparation process of the bed material for the melting of waste incineration fly ash in this embodiment comprises the following steps:

[0063] (1) Raw material pretreatment

[0064] Fly ash, silica sand, soda ash, flux, bentonite, and gasification residue are crushed separately, and the particle size of each component after crushing is 120-150 mesh;

[0065] (2) Raw material ratio

[0066] Mix the crushed fly ...

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Abstract

The invention discloses a bed layer material for melting waste incineration fly ash, a preparation technology and a treatment method and relates to the technical field of environmental engineering. The bed layer material is made of raw material powder and liquid; the raw material powder comprises fly ash, silicon dioxide, alkaline agentia, a fluxing agent, a binder and carbon powder; and the liquid is one or more selected from running water, biogas slurry and leachate. The bed layer material is reduced in melting temperature; the heavy metal leaching concentration of the melting product vitreous body is far lower than the standard limiting value; and contents of dioxin and normal pollutants in flue gas meet the national standard, so that harmlessness of fly ash is thoroughly realized to solve the problem of secondary pollution caused by waste incineration fly ash; and in addition, the resource is recycled, so that the bed layer material has the advantages of saving energy, lowering thecost, realizing treatment of wastes with processes of wastes against one another, co-processing and facilitating large-scale industrial production and application.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of environmental engineering, and specifically relate to a bed material used for melting fly ash of waste incineration, a preparation process and a treatment method. Background technique [0002] Waste incineration fly ash is solid waste collected by the exhaust gas purification system after waste incineration. It is rich in a variety of leached toxic heavy metals and dioxins and other toxic and harmful substances. Under normal circumstances, these toxic and harmful substances seep out of the fly ash, which will cause serious pollution to the water body and soil in the surrounding environment, destroy the ecological environment, and endanger the safety of human life. Therefore, it is included in the "National Hazardous Waste List" (2016 Edition ), which are hazardous wastes strictly controlled by the state. [0003] Melting treatment is to use fuel or electric power to heat fly ash...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B2101/30B09B3/40
Inventor 王明飞温冬李本善郑凤才付立李咏梅何亮张晨光
Owner BEIJING ENVIRONMENT ENG TECH CO LTD
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