Waste salt resourceful treatment system and application

A disposal system and recycling technology, applied in inorganic chemistry, alkali metal compounds, alkali metal carbonates, etc., can solve the problems of occupation, secondary pollution, large land, etc., and achieve stable use, easy operation, and simple equipment. Effect

Pending Publication Date: 2019-09-06
北京航天环境工程有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This disposal method not only occupies a large amount of land, but also easily causes secondary pollution

Method used

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  • Waste salt resourceful treatment system and application
  • Waste salt resourceful treatment system and application
  • Waste salt resourceful treatment system and application

Examples

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0055] Structures not described in detail in the present invention can be understood as conventional structures in the art.

[0056] A waste salt resource treatment and disposal system, such as figure 1 As shown, the system includes a carbonization pyrolysis system of waste salt, a dissolution and filtration system of carbon-containing salt slag, and an evaporation and salt separation system connected in sequence. The waste salt I composed of sodium sulfate monomer salt or mixed waste salt is carbonized and pyrolyzed, and the tail gas can be treated and discharged up to standard; The treated carbon-containing salt residue is dissolved and filtered; the evaporation and salt separation system can perform evaporation concentration, fractional cr...

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Abstract

The invention relates to a waste salt resourceful treatment system which comprises a waste salt carbonization and pyrolysis system, a carbon-containing salt slag dissolving and filtering system and anevaporating and salt separating system in sequential connection, wherein the waste salt carbonization and pyrolysis system can carry out carbonization and pyrolysis treatment on waste salt I composedof sodium chloride, and sodium sulfate monomer salt or mixed waste salt and also can treat tail gas; the carbon-containing salt slag dissolving and filtering system can dissolve and filter the carbon-containing salt slag treated by the waste salt carbonization and pyrolysis system; and the evaporating and salt separating system can carry out evaporation and concentration, fractional crystallization and drying treatment on the strong brine treated by the carbon-containing salt slag dissolving and filtering system to obtain product salt. The waste salt resourceful treatment system takes industrial waste salt as the raw material, removes organic pollutant from waste salt and separates mixed inorganic salt to finally obtain an industrial second-grade salt product, so that recycling of waste salt is realized, and the flue gas generated during the production process is discharged after reaching the standard.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a waste salt resource treatment and disposal system and its application. Background technique [0002] Industrial waste salt mainly comes from coal chemical industry, pesticide, chemical fertilizer, biochemical industry and other industries. These industrial waste salts often cannot be reused in industrial production because they contain a certain amount of organic matter. The relevant national legal documents also classify these waste salts as dangerous waste. Waste salt is often complex in composition and highly toxic and harmful, which is a difficult point in the treatment of hazardous waste industries, and the treatment cost is extremely high. The treatment cost per ton is more than 3,500 yuan, which often brings a great burden to enterprises and also causes waste of resources. [0003] At present, domestic and foreign technologies for waste salt treatment are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C01D7/00
CPCB09B3/00B09B5/00C01D7/00B09B2101/02B09B3/40
Inventor 伍可炳吴雅菲贾文峰刘兆言李腾龙任向阳张弛
Owner 北京航天环境工程有限公司
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