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A method for reducing the generation of dioxins in incinerators from the source

An incinerator and source technology, applied in the field of reducing dioxin generation in incinerators at the source, can solve problems such as increasing operating costs, achieve the effects of reducing overall costs, saving dioxin emission reduction control costs, and inhibiting dioxin generation

Active Publication Date: 2018-04-24
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents all use different means to cool the high-temperature flue gas at the outlet of the second combustion chamber of the incinerator to avoid the dioxin generation interval, thereby reducing the generation of dioxins, but they all need to increase corresponding equipment or devices , increasing operating costs

Method used

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  • A method for reducing the generation of dioxins in incinerators from the source
  • A method for reducing the generation of dioxins in incinerators from the source
  • A method for reducing the generation of dioxins in incinerators from the source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example is a laboratory test. The waste anion resin is bagged from the site of the water treatment enterprise. The hot rolling sludge in the site material of the iron and steel production enterprise is selected as the original material, and the dioxin generation capacity test is carried out after blending with the waste resin. . The hot-rolling sludge should be dehydrated before use, and the water content should be controlled below 60%; then it should be crushed by a crusher and passed through a 100-mesh sieve. Blend and stir the waste anion resin and the incineration material to obtain the incineration mixture. According to the cloth temperature of the on-site rotary kiln, the temperature of the three-stage tube furnace is set at 850°C, 650°C, and 350°C to simulate the temperature gradient of the rotary kiln from combustion to flue gas cooling. The furnace atmosphere simulates the on-site atmosphere and is the standard air purchased by the gas company. The sludg...

Embodiment 2

[0039] This embodiment is an actual production application on site, and the flow of the device used is as follows figure 1 shown.

[0040] The raw material for the incinerator is hot rolling sludge. The resin used is the waste anion resin used to produce pure water, which comes from the replacement of waste and old resin in the strong cathode tower of the water plant. The original waste resin is treated as hazardous waste. After the resin is transported to the incinerator site, the bag is broken manually, transferred by dump truck, and poured into the No. 1 incineration material tank 1 for standby. The hot-rolling sludge should be dehydrated before use, and the water content should be controlled below 60%, and then stored in No. 2 incineration material tank 3. Manual control of resin feeding frequency during production. The feeding frequency is determined by the incineration test, and finally set at 12 minutes / 3 seconds (interval time / feeding time), while the feeding frequ...

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Abstract

The invention relates to the field of smoke-gas treatment in the metallurgical industry, and aims at providing a method for reducing dioxin generation of an incinerator from a source. The method comprises the following steps: taking sludge or dirty waste oil generated during a steel production process as an incineration material, mixing and uniformly stirring the incineration material with waste anion resin coming from a water treatment device to obtain an incineration mixture, wherein the mass of the resin occupies 20-40% of the mass of the incineration material in the incineration mixture; conveying the incineration mixture to an incineration furnace and incinerating, and further decomposing and incinerating in a secondary combustion chamber; and enabling the waste gas generated by the incineration to enter a stabilizer and rapidly cooling, then conveying the waste gas to a dust remover and removing the pollutants of dust and SO2, thus realizing final emission. The method provided by the invention has a quite remarkable effect of inhibiting the dioxin generation, and can reduce 70% or more of a dioxin production compared with a method of independently incinerating the incineration material without adding the anion resin. The method can be used for disposing the waste resin of the water treatment device simultaneously, can greatly reduce the comprehensive cost of waste disposal, and can save 70% or more of coal gas consumption.

Description

technical field [0001] The invention relates to the field of flue gas treatment in the metallurgical industry, in particular to a method for reducing the generation of dioxin in an incinerator at the source, and belongs to the field of metallurgical waste gas treatment and related waste gas treatment. Background technique [0002] Some iron and steel enterprises are equipped with sludge incineration equipment such as rotary kilns for the purpose of inorganic treatment of sludge, scum, tallow, and miscellaneous waste oil generated in each branch factory. The residue after burning contains high iron content, accounting for about 60-80%. It can be sintered and processed into pellets, turning waste into treasure. However, the waste gas produced by rotary kiln incineration may contain pollutants such as dioxins. Dioxins, as persistent organic pollutants, are not only highly toxic, but also carcinogenic and mutagenic, and have genetic effects. [0003] At present, there are two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23G7/00F23J15/02F23J15/04
CPCF23G7/00F23G2201/702F23G2203/20F23J15/02F23J15/04F23J2215/301
Inventor 俞勇梅李晓东凌艳艳陈彤邵云生徐帅玺李咸伟刘道清胡子国
Owner ZHEJIANG UNIV