Hazardous waste melting disposal method

Abstract

The invention discloses a hazardous waste melting disposal method and belongs to the field of hazardous waste treatment. The hazardous waste melting disposal method can treat solid organic hazardous wastes, liquid organic hazardous waste and solid inorganic hazardous wastes at the same time. The hazardous waste melting disposal method mainly comprises the following steps of performing reduction pretreatment on the solid organic hazardous wastes, performing concentration pretreatment on the liquid organic hazardous wastes, performing burdening, mixing and briquetting on the solid inorganic hazardous wastes, a flux and a reducing agent to obtain a lump material, and transferring the lump material and an intermediate product obtained in the pretreatment step into an oxygen-enriched side blownmelting disposal furnace together for melting disposal to obtain a crude metal ingot and a vitreous water-quenched slag product; and performing secondary combustion, heat recovery and flue gas purification on flue gas produced with melting disposal, and performing standardized discharge on the treated flue gas. The hazardous waste melting disposal method provided by the invention has the advantages of wide application range of raw materials and capability of thoroughly realizing safety disposal and resource recovery of the 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...

AI Technical Summary

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

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