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Cooperative disposal method of hazardous waste incineration residues and solid wastes, ceramsite and application of ceramsite

A technology for solid waste and hazardous waste, applied in the field of resources and environment, can solve the problems of limited development of ceramsite, limited shale and clay resources, etc., achieve significant economic and environmental benefits, reduce the burden on the ecological environment, and save landfill land. Effect

Active Publication Date: 2020-01-24
TIANJIN UNIVERSITY OF TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the raw materials for the production of ceramsite in my country are mainly shale and clay. However, the resources of shale and clay are limited, and the development of the ceramsite industry is greatly restricted.

Method used

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  • Cooperative disposal method of hazardous waste incineration residues and solid wastes, ceramsite and application of ceramsite
  • Cooperative disposal method of hazardous waste incineration residues and solid wastes, ceramsite and application of ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] After testing, the hazardous waste incineration residue includes the following components in mass percentage: SiO 2 35wt%, total heavy metal (Pb) 30ppm, CaO 25wt%, Al 2 o 3 32wt%, 3wt% organic matter and the remainder impurities;

[0042] Hazardous waste incineration fly ash includes the following components in mass percentage: activated carbon 30wt% and calcium hydroxide 70wt%;

[0043] Fly ash includes the following components in mass percentage: SiO 2 70wt%, CaO 12wt%, Al 2 o 3 16wt% and balance impurities;

[0044] Mix 1000kg of hazardous waste incineration residue, 50kg of hazardous waste incineration fly ash and 400kg of fly ash, and transport them to granulation equipment for granulation to obtain granular materials, wherein the particle size of the granular materials is 15-20mm;

[0045] Transport the granular material to the rotary drying equipment, and dry it at 150°C for 20 minutes, and the moisture content of the obtained dried material is 3%;

[...

Embodiment 2

[0049] Hazardous waste incineration residues include the following components in mass percentages: SiO 2 35wt%, total heavy metal (Pb) 30ppm, CaO 25wt%, Al 2 o 3 32wt%, 3wt% organic matter and the remainder impurities;

[0050] Sludge includes the following components in mass percentage: SiO 2 25wt%, FeO 5wt%, Al 2 o 3 11wt%, organic matter 8wt% and balance water;

[0051] Mix 1000kg of hazardous waste incineration residue and 2000kg of sludge evenly, transport them to granulation equipment for granulation, and obtain granular materials, wherein the particle size of the granular materials is 20-25mm;

[0052] Transport the granular material to the rotary drying equipment, and dry it at 250°C for 15 minutes, and the moisture content of the obtained dried material is 1%;

[0053] Transport the dried material to a calciner, and calcinate at 1150°C for 20 minutes. The hot tail gas generated by the calcining is used to dry the granular material, and the tail gas generated...

Embodiment 3

[0056] Hazardous waste incineration residues include the following components in mass percentages: SiO 2 38wt%, total heavy metal (Pb) 40ppm, CaO 26wt%, Al 2 o 3 30wt%, 2wt% organic matter and the remainder impurities;

[0057] Oil sludge sand includes the following components in mass percentage: SiO 2 38wt%, FeO 2wt%, Al 2 o 3 10wt%, CaO 12wt%, organic matter 7wt% and balance water;

[0058] Mix 1000kg of hazardous waste incineration residue and 2000kg of oil sludge evenly, and transport them to granulation equipment for granulation to obtain granular materials, wherein the particle size of the granular materials is 10-15mm;

[0059] Transport the granular material to the rotary drying equipment, and dry it at 280°C for 10 minutes, and the moisture content of the obtained dried material is 2%;

[0060] Transport the dried material to a calciner, and calcinate at 1150°C for 20 minutes. The hot tail gas generated by the calcining is used to dry the granular material, ...

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Abstract

The invention provides a cooperative disposal method of hazardous waste incineration residues and solid wastes, ceramsite and an application of the ceramsite, and belongs to the field of resources andenvironment. The disposal method provided by the invention comprises the following steps: mixing hazardous waste incineration residues and solid wastes, granulating the obtained mixture, and sequentially carrying out drying and calcining to obtain the ceramsite. According to the invention, the hazardous waste incineration residues and the solid wastes are used as raw materials for preparing the ceramsite by cooperative disposal, dioxins and organic matter in the hazardous waste incineration residues and the solid wastes are decomposed, and heavy metals contained in the hazardous waste incineration residues and the solid wastes are reduced and solidified, so that the disposal problem of hazardous waste incineration residues and solid wastes is solved, a large amount of landfill land is saved, and cost of comprehensive disposal is significantly reduced. New hazardous wastes are not generated, burden on the ecological environment is reduced, and the method has remarkable economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of resources and environment, and in particular relates to a method for co-disposing of hazardous waste incineration residues and solid waste, ceramsite and applications thereof. Background technique [0002] During the incineration of hazardous waste, the incinerator will produce two kinds of solid wastes: residue and fly ash. Among them, the slag from the incinerator is about 10-20wt% of the incinerator, and the non-combustible components it contains are mainly silicon, calcium, iron, inorganic Salt and unburned carbide and other components also contain toxic and harmful components such as dioxins and heavy metals; fly ash is mainly solid waste generated in the exhaust gas treatment part, mainly including the dust from the furnace and the dioxins and acid gases. Activated carbon and calcium hydroxide, the annual output of this part of hazardous waste is about 4 million tons; the current disposal methods for the two ...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B38/00C04B18/02
CPCC04B35/62204C04B35/622C04B38/00C04B18/027C04B2235/5427C04B2235/606C04B2235/656C04B2235/6567C04B2235/77C04B2235/96Y02W30/91C04B33/1325C04B35/62695C04B33/132C04B33/1352C04B33/1321C04B33/138C04B2235/3418C04B2235/3208C04B33/20C04B38/009Y02P40/60C04B18/023C04B18/0418C04B18/049C04B18/08C04B18/10C04B18/106C04B18/141
Inventor 李梅彤袁文蛟张柯范文浩徐元张又天
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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