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A method and device for harmless treatment of industrial waste salt by using alkaline melt

A technology for harmless treatment and industrial waste salt, which is applied in the field of hazardous waste treatment and recycling, and can solve the problems of low organic matter removal efficiency and toxic tail gas

Active Publication Date: 2021-05-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A method and device for harmless treatment of industrial waste salt by using 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 supply pipeline is connected with a feed mechanism, the feed mechanism in this embodiment includes a dryer 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 device 9 and a cr...

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Abstract

The invention relates to a method and device for harmless treatment of industrial waste salt by using alkaline melt. The method aims at the characteristics that the organic matter contained in industrial waste salt is complex and difficult to remove. The salt is heated and melted, and industrial waste salt and oxidizing gas are introduced. The organic matter in the industrial waste salt can be decomposed and gasified in the reaction furnace, and the residue is a high-purity salt product. industrial salt products. Compared with the prior art, the present invention has easy-to-obtain raw materials, simple operation, and does not produce secondary pollution such as harmful acid gas and dioxin; it realizes the harmless treatment of industrial waste salt containing organic matter and the decontamination of salt components. Recycling and utilization of resources, low investment cost, wide application, high environmental protection 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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Patent Type & Authority Patents(China)
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