Method for incinerating dangerous solid wastes by utilizing high-concentration oxygen

A high-concentration oxygen and dangerous technology, used in combustion methods, incinerators, combustion types, etc., can solve the problems of insufficient combustion, low oxygen concentration, hazards, etc., to reduce energy consumption, reduce flue gas volume, The effect of reducing smoke loss

Inactive Publication Date: 2017-02-15
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] When hazardous solid waste is incinerated, the incinerator has a simple structure, and the oxygen concentration charged is not high, and the combustion is not sufficient, which will produce a large amount of flue gas, dioxin (dioxin emission rate is about 0.07%) and other secondary Pollutants that cause harm to humans through the food chain

Method used

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  • Method for incinerating dangerous solid wastes by utilizing high-concentration oxygen

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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the hazardous waste produced by a certain petrochemical industry is pretreated by compaction, crushing, shearing, etc., and then sent to the rotary furnace incinerator through the hopper, and 85% preheated high-concentration oxygen is blown into the same end. , the mass ratio of hazardous solid waste to high-concentration oxygen is 1:5, so that hazardous solid waste and high-concentration oxygen are fully contacted, and incinerated in an incinerator for harmless treatment. The incineration temperature is 1000°C and the incineration time is 7s; The slag produced by incineration is treated by conventional methods such as destabilization and other processes; the generated high-temperature flue gas is passed into the secondary combustion chamber for complete combustion, the temperature is 1100 °C, the residence time of the flue gas in the secondary combustion chamber is 10S, and the outlet tail gas comes out The amount of dioxin is ≤0.03%, and the...

Embodiment 2

[0021] Such as figure 1 As shown, the hazardous solid waste produced by an electronics factory is sent to the fluidized bed incinerator through the hopper after pretreatment, and 50% preheated high-concentration oxygen is blown into the same end, and the hazardous solid waste and high-concentration The mass ratio of oxygen is 1:4, so that hazardous solid waste can be fully contacted with high-concentration oxygen, and incinerated for harmless treatment in the incinerator. The temperature of the incinerator is 2000°C, and the incineration time is 2s; Methods: Destabilization and other processes were carried out; the generated high-temperature flue gas was passed into the secondary combustion chamber for complete combustion, the temperature was 1000°C, the residence time of the flue gas in the secondary combustion chamber was 2S, and the amount of dioxin in the outlet tail gas was ≤0.04% , the amount of flue gas is reduced by 70%; the waste heat generated in the incineration is ...

Embodiment 3

[0023] Such as figure 1 As shown, a hospital waste is pretreated and sent to the blast furnace hot air incinerator through a hopper, and preheated 100% high-concentration oxygen is blown into the same end. The mass ratio of hazardous solid waste to high-concentration oxygen is 1 :3. Make the hazardous solid waste fully contact with high-concentration oxygen, and carry out incineration and harmless treatment in the incinerator. The incineration temperature is 1300°C, and the incineration time is 5s; the slag produced by incineration is destabilized by conventional methods. Treatment; the high-temperature flue gas produced is passed into the secondary combustion chamber for complete combustion, the temperature is 1700°C, the residence time of the flue gas in the secondary combustion chamber is 3S, the amount of dioxin in the outlet tail gas is ≤0.02%, and the amount of flue gas is reduced by 80% %; The waste heat generated in the incineration is used to preheat the high-concentr...

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Abstract

The invention discloses a method for incinerating dangerous solid wastes by utilizing high-concentration oxygen. According to the method, the dangerous solid wastes have full contact with high-concentration oxygen after being pretreated and are then incinerated; high-temperature flue gas generated by incineration is completely combusted in a secondary-combustion chamber; generated furnace slag is subjected to treatment procedures such as destabilization; afterheat generated by incineration is used for preheating the high-concentration oxygen for incineration. The method is an environment-friendly effective dangerous solid waste treatment method which is capable of effectively increasing the incineration temperature, restraining generation of secondary pollutants such as dioxin, greatly reducing emission load of flue gas and fully utilizing the heat generated in an incineration process.

Description

technical field [0001] The invention relates to a method for incinerating hazardous solid waste by using high-concentration oxygen, belonging to the field of hazardous solid waste processing. Background technique [0002] Hazardous solid waste is harmful, toxic, explosive, flammable, corrosive, etc. Improper disposal of hazardous solid waste will cause serious environmental pollution and waste of resources. For example, hazardous waste generated by petrochemical enterprises during production and transportation enters the atmosphere through volatilization and leakage, thereby polluting the surrounding environment. Long-term odor pollution may cause diseases such as the human respiratory tract, digestive system, and reproductive system. In order to protect the living environment of residents and their own safety, hazardous solid waste must be properly disposed of. The incineration treatment of hazardous solid waste can minimize the amount of waste to be treated and effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/46F23L7/00F23L15/00
CPCF23G5/46F23G2206/10F23L7/007F23L15/00Y02E20/34
Inventor 胡学伟姚琪宁平杨磊刘树根
Owner KUNMING UNIV OF SCI & TECH
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