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A treatment method for heavy metals such as dioxin and mercury in fly ash

A treatment method and heavy metal technology, applied in the field of fly ash treatment, can solve the problems of heavy metal pollution such as dioxin and mercury, and achieve the effect of solving the pollution problem

Active Publication Date: 2021-01-05
北京工大环能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is a treatment method for heavy metals such as dioxin and mercury in fly ash, so as to simultaneously solve the pollution problem of heavy metals such as dioxin and mercury in fly ash

Method used

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  • A treatment method for heavy metals such as dioxin and mercury in fly ash

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 as shown,

[0020] (1), adding SiO 2 The regulator is mixed into the fly ash, and then the adjusted fly ash is added to the briquetting machine 1 for briquetting pretreatment;

[0021] (2) In the high-temperature plasma furnace 2, the briquetted fly ash is heated to melt it. At this stage, the dioxin 8 is completely decomposed into harmless smoke, and the heavy metals except mercury are stably solidified in the molten body to form In the vitreous body 9;

[0022] (3) Mercury-containing flue gas passes through the condensing device to reduce the gas temperature; then use the water removal system to reduce the water content of the flue gas (the water vapor content is reduced to 3% at room temperature); the cooled flue gas enters to further reduce the dust content ; After entering the low-temperature plasma reactor 3, the pollutants in the flue gas are oxidized and decomposed;

[0023] (4), the flue gas that comes out from low-temperature plasma reacto...

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Abstract

The invention relates to a method for treating heavy metals such as dioxin and mercury in fly ash, and belongs to the technical field of fly ash treatment. Fly ash produced by waste incineration, medical waste incineration, industrial waste incineration and other industries contains dioxins and heavy metals (such as mercury, cadmium, lead, chromium and metalloid arsenic with significant biological toxicity), which are hazardous solid wastes. Must be disposed of harmlessly. In order to solve the pollution problem of heavy metals such as dioxin and mercury in the fly ash thoroughly at the same time, the present invention adopts high-temperature plasma and low-temperature plasma coupling technology, ceramic nanomaterial adsorption and regeneration technology, and realizes the disposal process through a wet extraction device. Mercury salts, mercury soot and other wastes can be recovered as resources.

Description

technical field [0001] The invention relates to a method for treating heavy metals such as dioxin and mercury in fly ash, and belongs to the technical field of fly ash treatment. Background technique [0002] Fly ash produced by waste incineration, medical waste incineration, industrial waste incineration and other industries contains dioxins and heavy metals (such as mercury, cadmium, lead, chromium and metalloid arsenic with significant biological toxicity), which are hazardous solid wastes. Harmless disposal must be carried out. [0003] There are some patents related to the treatment of heavy metals, dioxins and mercury in fly ash. Patent CN101797572A discloses a method for plasma treatment of waste incineration. In this method, mercury vapor in the tail gas is removed through an activated carbon adsorption tower. The activated carbon that has adsorbed mercury vapor is still a hazardous waste, and the treatment of mercury is not thorough. Patent CN 1632376A discloses a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B5/00B09B2101/30B09B3/40
Inventor 黄庆华
Owner 北京工大环能科技有限公司