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Method for recycling industrial waste salt

A resourceful and industrial technology, applied in the direction of alkali metal chloride, alkali metal sulfite/sulfate purification, etc., to achieve the effect of simple and fast preparation process, sufficient calcination time, and convenient resource reuse

Inactive Publication Date: 2022-07-29
江苏河加海环境设计研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for recycling industrial waste miscellaneous salt, which solves the problem that the current general method cannot effectively and scale-up the resource utilization of industrial waste miscellaneous salt, and cannot meet the needs of people. question of request

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  • Method for recycling industrial waste salt

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Effect test

Embodiment 1

[0030] refer to figure 1 , a method for recycling industrial waste miscellaneous salts, comprising the following steps:

[0031] S1: calcination, put the industrial waste mixed salt into the calciner for calcination, the calcined tail gas is then thoroughly burned through the regenerative tail gas incinerator, the tail gas in S1 is calcined and then preheated and recovered, sprayed and absorbed, sprayed with liquid Activated carbon particles are added to the exhaust gas, and through preheating and recovery, the spray absorption step can absorb the exhaust gas, and the activated carbon particles in the spray liquid can further absorb the impurities in the exhaust gas to achieve the purpose of harmless discharge, green and environmental protection, in S1 The residence time of the material in the calcination process of industrial waste miscellaneous salt is 8 hours, and the calcination temperature is 300 degrees Celsius. By controlling the calcination temperature and time, the te...

Embodiment 2

[0038] refer to figure 1 , a method for recycling industrial waste miscellaneous salts, comprising the following steps:

[0039] S1: calcination, put the industrial waste mixed salt into the calciner for calcination, the calcined tail gas is then thoroughly burned through the regenerative tail gas incinerator, the tail gas in S1 is calcined and then preheated and recovered, sprayed and absorbed, sprayed with liquid Activated carbon particles are added to the exhaust gas, and through preheating and recovery, the spray absorption step can absorb the exhaust gas, and the activated carbon particles in the spray liquid can further absorb the impurities in the exhaust gas to achieve the purpose of harmless discharge, green and environmental protection, in S1 The residence time of the material in the calcination process of the industrial waste miscellaneous salt is 6 hours, and the calcination temperature is 550 degrees Celsius. By controlling the calcination temperature and time, th...

Embodiment 3

[0046] refer to figure 1 , a method for recycling industrial waste miscellaneous salts, comprising the following steps:

[0047] S1: calcination, put the industrial waste salt into the calciner for calcination, the calcined tail gas is then thoroughly burned through the regenerative tail gas incinerator, the tail gas in S1 is calcined and then preheated and recovered, sprayed and absorbed, sprayed with liquid Activated carbon particles are added to the exhaust gas, and through preheating and recovery, the spray absorption step can absorb the exhaust gas, and the activated carbon particles in the spray liquid can further absorb the impurities in the exhaust gas to achieve the purpose of harmless discharge, green and environmental protection, in S1 During the calcination process of industrial waste miscellaneous salt, the residence time of the material is 6 hours, and the calcination temperature is 400 degrees Celsius. By controlling the calcination temperature and time, the tem...

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Abstract

The invention relates to the technical field of industrial waste treatment, and discloses a method for recycling industrial waste carnallite, which comprises the following steps: S1, calcining: putting the industrial waste carnallite into a calcining furnace for calcining, and thoroughly incinerating the calcined tail gas through a heat accumulating type tail gas incinerator; s2, dissolving the filtered and calcined salt with water to prepare a saturated solution, then carrying out solid-liquid separation by virtue of a filter, carrying out residual organic matter removal treatment on the solution by virtue of synergistic photocatalytic oxidation to obtain a sodium chloride solution without organic matters, and carrying out curing treatment on residues obtained by filtering; and S3, refining: sequentially carrying out sulfate radical removal and calcium ion removal treatment on the obtained sodium chloride solution without the organic matters. The preparation process is simple and rapid, short in processing time, high in efficiency, standard in operation, safe and reliable, and organic matters in the industrial waste salt are fully decomposed and oxidized, so that impurities are fully removed, and resource reutilization of materials is facilitated.

Description

technical field [0001] The invention relates to the technical field of industrial waste treatment, in particular to a method for recycling industrial waste miscellaneous salts. Background technique [0002] In recent years, with the rapid development of petrochemical, electric power, metallurgy, coal chemical and other industries, the amount of wastewater with complex components such as reverse osmosis concentrated water, industrial sewage, circulating sewage and some process drainage generated in the industrial production process has increased year by year. , the final disposal and reuse of these complex sewage has received extensive attention. In general, the sewage is filtered to remove impurities, concentrated and evaporated and crystallized to prepare industrial waste miscellaneous salts. [0003] This kind of industrial waste miscellaneous salt is easy to dissolve. If it is improperly disposed of, it will easily affect the groundwater system and the surrounding ecologi...

Claims

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Application Information

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IPC IPC(8): C01D3/08C01D5/16
CPCC01D3/08C01D5/16
Inventor 杨勇刘玉东姜伟周碧波鲁学蕾
Owner 江苏河加海环境设计研究院有限公司
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