Hazardous waste disposal method

A technology of hazardous waste and treatment method, which is applied in the field of hazardous waste treatment, can solve the problems of excessive heavy metal toxicity, low thermal reduction rate and excessive dioxin content in ash and slag, and achieve the effect of resource utilization.

Inactive Publication Date: 2019-07-19
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ash produced by incineration is still hazardous waste, and generally needs to be chelated and solidified for landfill treatment, which will pose a potential threat to the environment around the landfill; and the ash produced by hazardous waste incineration has excessive toxicity of heavy metals and low thermal ignition loss rate ; At the same time, the existing way of incinerating hazardous waste is easy to generate dioxin precursors, resulting in excessive dioxin content in the exhausted flue gas

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) The medical waste, rectification residue and organic resin waste are crushed and pretreated, and pushed into the countercurrent rotary kiln through the push rod feeding device for incineration; at the same time, the waste organic solvent and waste mineral oil, etc. Liquid hazardous waste is sprayed into the rotary kiln for incineration;

[0064] (2) Keep the temperature of the kiln head of the counter-current rotary kiln at about 800°C for the first incineration treatment, keep full combustion, and obtain bottom slag at the kiln head and kiln tail of the rotary kiln, the slag discharge temperature is 800°C, and the thermal ignition loss rate 2.5%, the hot bottom slag is directly sent into the submerged thermal electric furnace through the closed chute;

[0065] (3) The flue gas discharged from the counter-current rotary kiln enters the secondary combustion chamber for the second incineration treatment, and the combustion temperature is 1200°C; the fly ash generated ...

Embodiment 2

[0071] (1) The organic halide waste (HW45), paint waste (HW12) and surface treatment waste (HW17) are crushed and pretreated, and pushed into the countercurrent rotary kiln through the screw feeding device for incineration; at the same time, the spray gun device is used Liquid hazardous wastes such as emulsion (HW09), pesticide waste (HW04) and phenolic waste (HW39) are sprayed into the rotary kiln for incineration;

[0072] (2) Keep the temperature of the kiln head of the counter-current rotary kiln at about 1000°C for the first incineration treatment, keep full combustion, and obtain bottom slag at the kiln head and kiln tail of the rotary kiln, the slag discharge temperature is 900°C, and the thermal ignition loss rate 2.0%, the hot bottom slag is discharged from the discharge port of the rotary kiln to the sealed material tank, and the bottom slag in the sealed material tank is put into the feed port of the submerged thermal electric furnace through the lifting device;

[...

Embodiment 3

[0079] (1) Medical waste (HW01), asbestos waste (HW36), organic cyanide waste (HW38), spent catalyst (HW50) and distillation residue (HW11) are crushed and pretreated, and pushed into countercurrent rotation by the push rod feeding device Incineration treatment in the kiln; at the same time, liquid hazardous wastes such as waste mineral oil (HW08), pesticide waste (HW04) and waste acid (HW34) are sprayed into the rotary kiln for incineration treatment with a spray gun device;

[0080] (2) Keep the temperature of the kiln head of the counter-current rotary kiln at about 1050°C for the first incineration treatment, keep full combustion, and obtain bottom slag at the kiln head and kiln tail of the rotary kiln, the slag discharge temperature is 950°C, and the thermal ignition loss rate 1.8%, the hot bottom slag is discharged from the discharge port of the rotary kiln to the sealed material tank, and the bottom slag in the sealed material tank is put into the feed port of the submer...

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Abstract

The invention provides a hazardous waste disposal method which comprises the following steps: carrying out primary incineration disposal on a hazardous waste to obtain bottom dreg and first flue gas;carrying out secondary incineration disposal on the first flue gas to obtain first fly ash and second flue gas; and melting a melted raw material to prepare one or more of microcrystal glass, fiber cotton and a cement admixture, wherein the melted raw material comprises the bottom dreg and the first fly ash. According to the hazardous waste disposal method provided by the invention, the emitted flue gas reaches the standard and the hazardous waste can be recycled.

Description

technical field [0001] The invention relates to a treatment method of hazardous waste, in particular to a method capable of realizing harmless treatment and resource utilization of hazardous waste. Background technique [0002] With the continuous advancement of my country's industrialization process, the amount of hazardous waste produced in the industrial production process has increased year by year, posing a serious threat to the ecological environment and public health. my country has a wide variety of hazardous wastes with complex components, high disposal and treatment costs, and limited processing capacity. Environmental pollution and risk accidents frequently occur due to improper disposal and disposal of hazardous wastes, and the situation of hazardous waste pollution prevention and control is severe. [0003] Currently, incineration is the mainstream technology for hazardous waste disposal. Incineration technology is a process in which hazardous wastes are combus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/20F23G5/16F23G5/44F23G5/46F23J15/02F23J15/06F23J15/08B09B3/00B09B5/00C03C10/00C03C13/06C04B7/28
CPCF23G5/20F23G5/16F23G5/442F23G5/46F23J15/06F23J15/022F23J15/02F23J15/08B09B5/00C03C10/0063C03C13/06C04B7/28F23J2217/101B09B3/40Y02P40/10
Inventor 陈德喜姚建明胡立琼李兴杰赵发敏高术杰
Owner CHINA ENFI ENGINEERING CORPORATION
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