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Method and device for harmless treatment of industrial waste salt by utilizing alkaline melt

A technology for harmless treatment and industrial waste salt, which is applied in the field of hazardous waste treatment and recycling, can solve the problems of toxic tail gas and low organic matter removal efficiency, and achieve the effects of improving thermal efficiency, lowering temperature, and avoiding land resources

Active Publication Date: 2019-11-22
TONGJI UNIV
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  • Abstract
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Problems solved by technology

However, the removal efficiency of organic matter by low-temperature heat treatment is not high, and a large amount of toxic tail gas is produced

Method used

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  • Method and device for harmless treatment of industrial waste salt by utilizing alkaline melt

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Embodiment 1

[0047] A device for the harmless treatment of industrial waste salt using alkaline melt, the schematic diagram of which is shown in figure 1 shown, including:

[0048]Melting reaction furnace 5, the melting reaction furnace 5 is connected with a gas supply pipeline; the gas totaling pipeline is connected with a feeding mechanism, and the feeding mechanism in this embodiment includes a drier 1, a crusher 2 and a feeder 3 connected in sequence , the feeding mechanism cooperates with the gas supply pipeline to realize the carrier gas transportation of industrial waste salt and the introduction of a separate oxidizing gas; the tail gas discharge port passes through the heat exchanger 4, the dust collector 6, and the gas scrubber 7 of the alkaline absorption liquid It is connected with the gas scrubber 8 of the organic solvent absorption liquid to realize the treatment and discharge of tail gas; the outlet of the reaction furnace at the bottom is connected with a salt washing devic...

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Abstract

The invention relates to a method and device for harmless treatment of industrial waste salt by utilizing alkaline melt. Aiming at the characteristics that the organic matter contained in industrial waste salt is complicated and is difficult to remove, a melting reaction furnace device is adopted to heat and melt inorganic salt; industrial waste salt and oxidizing gas are fed; the organic matter contained in the industrial waste salt can decompose and gasify in the reaction furnace; the residues are high-purity salt products; and the industrial salt product not containing the organic matter isobtained through dissolving, washing and multiple evaporative crystallization. Compared with the prior art, the raw materials are available, the operation is simple, and secondary pollution includingharmful acid gas and Dioxin is not generated; harmless treatment of the industrial waste salt containing the organic matter and resource recycling of the salt components are realized; and the methodis low in investment cost, and wide in applicable range and has higher environmentally-friendly and economic benefits.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment and recycling, and in particular relates to a method and a device for harmlessly treating industrial waste salt by alkaline melt. Background technique [0002] Waste salt is a by-product crystalline salt produced in industrial production, which comes from industrial chemical preparation and refining, chemical product production and high-salt wastewater treatment. In our country, there are many industries involved in the generation of waste salt, such as pesticide synthesis industry, chlor-alkali industry, coal chemical industry and environmental protection industry. The types of waste salt produced include single waste salt, mixed salt and miscellaneous salt (containing impurities). Due to the complexity of the process, the waste salt produced is often accompanied by organic and inorganic impurities, which is a hazardous waste. [0003] The terminal treatment technologies of waste salt ar...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00B01J6/00
CPCB09B5/00B01J6/005B09B3/40
Inventor 赵由才戴世金牛冬杰郑怡琳陈彧吴凡
Owner TONGJI UNIV
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