Combination melting furnace for treatment of arsenicsoda slag and low-melting-pointheavy-metal containing waste residue

Abstract

The invention discloses a combination melting furnace for treatment of arsenic soda slag and low-melting-point heavy-metal containing waste residue. The combination melting furnace for the treatment of the arsenic soda slag and the low-melting-point heavy-metal containing waste residue comprises an air-lock feeder, a rotary kiln, a vertical incinerator, a high-temperature flue gas chamber and a crushing discharging mechanism, the air-lock feeder is connected with the rotary kiln, the rotary kiln is connected with the vertical incinerator, the vertical incinerator is connected with the crushingdischarging mechanism, the high-temperature flue gas chamber covers the outer part of the rotary kiln, the cylindrical shell of the rotary kiln is connected with the two ends of the high-temperatureflue gas chamber and the machine shell of the vertical incinerator through sealing rings, after two stages of combustion process are conducted on materials through the rotary kiln and the vertical incinerator, high-temperature flue gas is discharged through the rotary kiln and an flue gas outlet of the high-temperature flue gas chamber, and complete combustion of the combusted slag is thoroughly achieved after through the action of the crushing discharging mechanism. The combination melting furnace for the treatment of the arsenic soda slag and the low-melting-point heavy-metal containing waste residue serves as combustion equipment, the equipment structure is simple and unique, the operation is convenient, the cost is low, waste residue smelting is conducted on industrial waste residue containing low-melting-point heavy-metal such as the arsenic soda slag and sludge containing arsenic, mercury, lead, zinc, cadmium through the unique technology of two stages combination combustion, andthe combination melting furnace for the treatment of the arsenic soda slag and the low-melting-point heavy-metal containing waste residue is also suitable for pyrolytic incineration of waste materialcontaining organics.

Description

technical field [0001] The invention belongs to the field of incinerators and related technologies, and in particular relates to a combined melting furnace for processing arsenic-alkali slag and low melting point heavy metal waste slag. Background technique [0002] With the development of the economy, there are more and more industrial waste residues and industrial wastes. Industrial waste residues containing low melting point heavy metals, such as arsenic alkali residues, arsenic, mercury, lead, zinc, cadmium sludge and other smelting waste residues, are directly stacked or buried for treatment. Waste will lead to the dissolution of toxic substances contained in it and pollute the environment. Therefore, special storage is required. Even so, leakage incidents occur frequently. The pollution of industrial waste has become a bottleneck factor restricting the development of the industry. [0003] The existing incineration methods generally use incineration furnaces such as gr...

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Problems solved by technology

[0002] With the development of the economy, there are more and more industrial waste residues and industrial wastes. Industrial waste residues containing low melting point heavy metals, such as arsenic alkali residues, arsenic, mercury, lead, zinc, cadmium sludge and other smelting waste residues, are directly stacked or buried for treatment. Waste will lead to the dissolution of toxic substances contained in it and pollute the environment, so special storage is required. Even so, frequent leakage incidents occur, and the pollution of industrial waste has become a bottleneck factor restricting the development of the industry

[0003] The existing incineration methods generally use incineration furnaces such as grate furnaces, fluidized bed furnaces, rotary kilns, vertical direct combustion furnaces, and vertical pyrolysis furnaces. These incineration devices are mainly used to process industrial waste, and most of them are monomer The structure of the combustion chamber is basically not equipped with a multi-form incineration smelting or system combining anaerobic (or anoxic) pyrolysis gasification and high-temperature calcination. The treatment substances are melted and sublimated at different temperatures to obtain different volatilized substances. The treatment of waste gas and waste residue cannot be truly harmless and resource-based.

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