Industrial waste salt resourceful treatment method and equipment

A technology of industrial waste salt and treatment method, which is applied in the direction of shape preparation of alkali metal halides, purification of alkali metal halides, purification of alkali metal nitrates, etc., can solve problems such as inability to be effectively utilized, reduce difficulty and cost, and ensure quality effect

Pending Publication Date: 2020-02-28
GO HIGHER ENVIRONMENT GRP CO LTD
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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the industrial waste salt cannot be eff

Method used

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  • Industrial waste salt resourceful treatment method and equipment
  • Industrial waste salt resourceful treatment method and equipment
  • Industrial waste salt resourceful treatment method and equipment

Examples

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Embodiment Construction

[0038] The following examples are provided for a better understanding of the present invention, and are not limited to the best embodiments, and do not limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by combining with the features of other prior art shall fall within the protection scope of the present invention.

[0039]If the specific experimental steps or conditions are not indicated in the examples, it can be carried out according to the operations or conditions of the conventional experimental steps described in the literature in this field. The reagents or instruments used without the manufacturer's indication are all conventional reagent products that can be obtained from the market.

[0040] In order to illustrate the advantages of the method for recycling industrial waste salt in the present invention, the following specific methods for recycling industrial waste salt are provided. Th...

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Abstract

The invention provides an industrial waste salt resourceful treatment method and equipment. The method comprises the following steps: sequentially dissolving industrial waste salt, chemically pre-removing impurities, deeply removing impurities, concentrating and reducing organic matters, and carrying out adsorption oxidation decolorization and multiple-effect evaporative crystallization to respectively obtain sodium sulfate, sodium chloride and sodium nitrate crystals; wherein the crystallization temperature of the sodium sulfate is 75-85 DEG C; the crystallization temperature of sodium chloride is 60-70 DEG C; and the crystallization temperature of sodium nitrate is 45-55 DEG C. According to the industrial waste salt resourceful treatment method provided by the invention, the organic matters and other impurities in the industrial waste salt are firstly removed by adopting the steps, then salt separation and crystallization are realized by controlling the temperature in the evaporationprocess, and the industrial waste salt is obtained by utilizing the difference of three-phase co-saturation points of the sodium chloride, sodium nitrate and sodium sulfate at different temperaturesand the solubility of each salt. And the purity and whiteness of the sodium chloride, sodium nitrate and sodium sulfate obtained by salt separation crystallization all reach industrial-grade standards, and the sodium chloride, sodium nitrate and sodium sulfate can be directly applied.

Description

technical field [0001] The invention relates to the technical field of industrial waste salt treatment, in particular to a method and equipment for recycling industrial waste salt. Background technique [0002] Waste salt mainly refers to the by-product crystalline salts produced in industrial production, which are mainly divided into single waste salt, mixed salt and mixed salt (including impurities) according to their composition; waste salt mainly comes from chemical production and wastewater treatment, including pure water Waste salt produced in the process of preparation, softening, high-salt wastewater, etc., as well as waste salt produced in processes such as by-product synthesis in the production of pesticides and chlor-alkali industries. Because the waste salt contains a lot of toxic and harmful substances, such as organic pollutants, heavy metal elements and other pollution, if the stacking is unreasonable, it is easy to cause pollution to the soil, groundwater and...

Claims

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Application Information

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IPC IPC(8): C01D5/16C01D3/24C01D3/16C01D9/16
CPCC01D3/16C01D3/24C01D5/16C01D9/16C01P2006/80
Inventor 陈福泰褚永前杨艳白立强
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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