A melting disposal method for hazardous waste

A hazardous waste and disposal method technology, applied in waste treatment, solid waste removal, chemical instruments and methods, etc., can solve the problems of high fuel consumption, waste of resources, inability to recycle resources, etc., and achieve the suppression of the production of dioxins , Reduce the amount of waste gas generated, and the effect of thorough resource utilization

Active Publication Date: 2020-04-03
ZHEJIANG SHENLIAN ENVIRONMENTAL PROTECTION GRP CO LTD
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Problems solved by technology

The main disadvantage of this method is that the fuel consumption of the rotary kiln incineration itself is very large, and it cannot form a synergistic effect with the subsequent high-temperature melting step. It needs to consume a large amount of energy again for high-temperature melting of the incineration residue, and the production cost is high; It can purify metals in hazardous wastes, but cannot be used as resources, resulting in a waste of resources

Method used

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  • A melting disposal method for hazardous waste

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Effect test

Embodiment 1

[0046] Solid organic hazardous waste: fine distillation residue (HW11), dye and paint waste (HW12), organic resin waste (HW13), with an average organic content of 70% (m / m) and an average water content of 30%.

[0047] Liquid organic hazardous waste: waste mineral oil (HW08), oil / water, hydrocarbon / water mixture (HW09).

[0048] Solid inorganic hazardous waste: surface treatment waste (HW17), incineration disposal residue (HW18), non-ferrous metal smelting waste (HW48), other waste (HW49), spent catalyst (HW50). The metal content is very low, with an average copper content of 2% (dry basis), an average nickel content of 1.5% (dry basis), and an average zinc content of 1.0% (dry basis).

[0049] (1) Low temperature pretreatment

[0050] Treat 50 tons of the above-mentioned solid organic hazardous waste per day, control the reduction pretreatment temperature to 450°C, and obtain carbon black residue and combustible fuel oil after reduction pretreatment for 60 minutes, and obtai...

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Abstract

The invention discloses a hazardous waste melting disposal method, which belongs to the field of hazardous waste treatment. The invention can simultaneously process solid organic hazardous waste, liquid organic hazardous waste and solid inorganic hazardous waste. The main steps of the present invention include: reducing and pretreating solid organic hazardous waste, concentrating and pretreating liquid organic hazardous waste, batching, mixing, and forming solid inorganic hazardous waste, flux, and reducing agent to obtain agglomerate materials, and The bulk material and the intermediate product obtained in the pretreatment step are transferred to an oxygen-enriched side-blowing melting treatment furnace for melting treatment, and the crude metal ingot and vitreous water-quenched slag products are obtained from the melting treatment. The flue gas generated by melting treatment is subjected to secondary combustion, heat energy recovery, and flue gas purification to meet the standard discharge. The invention has a wide application range of raw materials and can completely realize the safe disposal and recycling of hazardous wastes.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment and relates to a melting disposal method for hazardous waste. Background technique [0002] With the rapid development of my country's industry, the amount of hazardous waste has increased year by year, causing serious harm to the environment. Domestic and foreign treatment of hazardous waste includes two methods: "resource utilization" and "final disposal". In the field of hazardous waste resource utilization, it mainly focuses on the resource utilization of inorganic hazardous waste containing metals (such as electroplating sludge, metal waste residue, waste catalyst, etc.). This kind of waste has a certain recovery value, and often adopts the method of "pyrometallurgy". For example, "a method for preparing nickel-chromium alloy from stainless steel pickling sludge" disclosed in Chinese authorized patent CN 103526029B, " A treatment method for the harmless recycling of heavy metal soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/02B09B3/40Y02W30/78Y02W30/20
Inventor 叶标王治军卢丁
Owner ZHEJIANG SHENLIAN ENVIRONMENTAL PROTECTION GRP CO LTD
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