Waste incineration treatment process

A waste incineration and treatment process technology, applied in the direction of incinerator, combustion method, combustion type, etc., can solve the problem of limited fly ash treatment effect, achieve the effect of reducing poor curing effect, reducing volume expansion ratio, and good adsorption and curing effect

Pending Publication Date: 2022-04-12
北京北控绿海能环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, incineration of garbage will inevitably produce flue gas, which contains harmful gases such as dioxins and heavy metal particles. Therefore, it is necessary to treat the flue gas from garbage incineration. Although the flue gas is now filtered through the flue gas purification system, Activated carbon is used to adsorb harmful gases such as dioxins, and calcium hydroxide is used for deacidification treatment. However, the fly ash obtained after the above-mentioned flue gas treatment still contains various heavy metal elements and dioxins with relatively high leaching concentrations. Landfill or resource utilization can only be carried out after effective treatment
However, the traditional cement curing agent has limited effect on the above-mentioned fly ash treatment. Therefore, it is necessary to provide a new waste incineration treatment process, which can more effectively treat the heavy metals and dioxins in the waste fly ash, and is more conducive to subsequent filling. Burial or resource utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A waste incineration treatment process, comprising the following steps:

[0036] Incineration: The garbage in the garbage pool is lifted into the incinerator for incineration, and the deodorization treatment is carried out during the lifting process of the garbage, and oxygen is introduced into the incinerator at the same time;

[0037] Flue gas treatment: the flue gas enters the semi-dry spray reaction tower, and the lime slurry is sprayed in the tower for acid removal operation to obtain fly ash residue. Flue gas and incineration fly ash to be discharged;

[0038] Incineration fly ash treatment: Mix and stir the incineration fly ash and the treatment agent under the irradiation of a mercury lamp, add the cementitious material, and finally add water and stir to form a block to obtain a solidified body, and then perform landfill post-treatment;

[0039] Wherein, the addition amount of treatment agent is 5wt% of the mass of incineration fly ash, the addition amount of c...

Embodiment 2

[0045]A waste incineration treatment process, carried out according to the method in Example 1, the difference is that the addition of the treatment agent is 8wt% of the mass of the incineration fly ash, and the addition of the cementitious material is 18wt% of the mass of the incineration fly ash, The amount of water added is 32wt% of the incineration fly ash mass;

[0046] The cementitious material is cement and water glass with a mass ratio of 1:0.4;

[0047] Prepare the biochar loaded with graphene oxide according to the following steps:

[0048] Dissolve 30kg of graphene oxide in water of 2 volume multiples, then soak 30kg of biochar in the graphene oxide solution for 30 minutes, and dry at 50°C for 30 minutes to obtain graphene oxide-loaded biochar.

[0049] The treatment agent is made by the following steps:

[0050] Get 30kg of biochar, 20kg chelating agent, 10kg hydrotalcite and 8kg nano-titanium dioxide that are loaded with graphene oxide that 30kg above-mentioned ...

Embodiment 3

[0052] A waste incineration treatment process, carried out according to the method in Example 1, the difference is that the addition of the treatment agent is 12wt% of the mass of the incineration fly ash, and the addition of the cementitious material is 22wt% of the mass of the incineration fly ash, The amount of water added is 35wt% of the incineration fly ash mass;

[0053] The cementitious material is cement and water glass with a mass ratio of 1:0.5;

[0054] Prepare the biochar loaded with graphene oxide according to the following steps:

[0055] Dissolve 35kg of graphene oxide in water of 3 volume multiples, then soak 35kg of biochar in the graphene oxide solution for 40 minutes, and dry at 60°C for 20 minutes to obtain graphene oxide-loaded biochar.

[0056] The treatment agent is made by the following steps:

[0057] Get 35kg of biochar loaded with graphene oxide prepared in the above steps, 25kg of chelating agent, 15kg of hydrotalcite and 12kg of nano-titanium dio...

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Abstract

The invention relates to the field of waste incineration, and particularly discloses a waste incineration treatment process which comprises the following steps: waste incineration: performing waste incineration, and introducing oxygen in the incineration process; after the incineration flue gas is adsorbed by activated carbon and sprayed and deacidified by lime slurry, discharged flue gas and incineration fly ash are obtained; the incineration fly ash and a treatment agent are mixed and stirred under the condition of a mercury lamp or ultraviolet light, then a binding material is added, finally, water is added for stirring, building blocks are formed, and a solidified body is obtained; wherein the treatment agent is prepared by mixing the following raw materials in parts by weight: 15-25 parts of a chelating agent, 6-15 parts of hydrotalcite, 5-12 parts of nano titanium dioxide and 28-35 parts of graphene oxide loaded biochar. The device has the advantage that heavy metal and dioxin in the fly ash generated by waste incineration can be more effectively treated.

Description

technical field [0001] This application relates to the field of waste incineration treatment, more specifically, it relates to a waste incineration treatment process. Background technique [0002] With the initial development of the city, the population of the city has increased significantly, and the amount of urban waste has also increased. Incineration of waste is a way for most cities to deal with waste, so incinerators have been built in various places. After the garbage is treated by incineration, the amount of garbage can be reduced, and it also has the effect of saving land. In such a process, pathogens can also be eliminated, and toxic and harmful substances can be converted into non-toxic substances. [0003] However, incineration of garbage will inevitably produce flue gas, which contains harmful gases such as dioxins and heavy metal particles. Therefore, it is necessary to treat the flue gas from garbage incineration. Although the flue gas is now filtered through...

Claims

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Application Information

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IPC IPC(8): F23G5/44F23J15/02F23J15/04B01D53/02B01D53/80B01J20/20
Inventor 田锋杨臻王彦保吴永刚江兴涛
Owner 北京北控绿海能环保有限公司
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