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A kind of refining method of by-product industrial salt

A technology of by-product industry and refining method, which is applied in the field of refining of by-product industrial salt, which can solve problems such as difficult dissolution, filtration and cleaning, and achieve the effects of low cost, simple process operation, and improved removal efficiency

Active Publication Date: 2018-09-04
SHANDONG WEIFANG RAINBOW CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the by-product industrial salt contains a lot of organic matter, it is difficult to use the traditional methods of dissolution, filtration, evaporation, and crystallization to clean up, so it is necessary to design a more reasonable refining method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for refining by-product industrial salt, comprising the steps of:

[0023] (1) Dissolving the by-product industrial salt in the stirred tank, and continuously stirring at a rate of 100 rpm for 1 hour to obtain a saturated solution;

[0024] (2) Add a coagulant to the stirred tank through the dosing nozzle of the stirred tank, the coagulant adopts sodium hypochlorite and polyaluminum chloride, and the weight ratio of sodium hypochlorite and polyaluminum chloride is 1:1 , and the stirring rate is raised to 210 revs / min, and the reaction is continued for 2h, and the addition of the coagulant is 2wt% of the saturated solution obtained in step (1);

[0025] (3) The solution obtained in step (2) is sent into an air flotation machine, and the upper layer suspended matter is removed to obtain a clear liquid;

[0026] (4) the clear liquid obtained in step (3) is filtered through a multi-media filter and an active carbon filter in sequence;

[0027] (5) The filtrate of...

Embodiment 2

[0031] A method for refining by-product industrial salt, comprising the steps of:

[0032] (1) Dissolving the by-product industrial salt in the stirred tank, and continuously stirring at a rate of 200 rpm for 2 hours to obtain a saturated solution;

[0033] (2) Add a coagulant into the stirred tank through the dosing nozzle of the stirred tank, the coagulant adopts sodium hypochlorite and polyaluminum chloride, and the weight ratio of sodium hypochlorite and polyaluminum chloride is 3:1 , and the stirring rate is raised to 350 rpm, and the reaction is continued for 3h, and the addition of the coagulant is 5wt% of the saturated solution obtained in step (1);

[0034] (3) The solution obtained in step (2) is sent into an air flotation machine, and the upper layer suspended matter is removed to obtain a clear liquid;

[0035] (4) the clear liquid obtained in step (3) is filtered through a multi-media filter and an active carbon filter in sequence;

[0036] (5) The filtrate of s...

Embodiment 3

[0040] A method for refining by-product industrial salt, comprising the steps of:

[0041] (1) Dissolving the by-product industrial salt in the stirred tank, and continuously stirring at a rate of 150 rpm for 1.5 hours to obtain a saturated solution;

[0042] (2) Add a coagulant to the stirred tank through the dosing nozzle of the stirred tank, the coagulant adopts sodium hypochlorite and polyaluminum chloride, and the weight ratio of sodium hypochlorite and polyaluminum chloride is 2:1 , and the stirring rate is raised to 300 revs / min, and the reaction is continued for 2.5h, and the addition of the coagulant is 4wt% of the saturated solution obtained in step (1);

[0043] (3) The solution obtained in step (2) is sent into an air flotation machine, and the upper layer suspended matter is removed to obtain a clear liquid;

[0044] (4) the clear liquid obtained in step (3) is filtered through a multi-media filter and an active carbon filter in sequence;

[0045] (5) The filtra...

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PUM

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Abstract

The invention provides a refining method of by-product industrial salt and belongs to the technical field of by-product industrial salt treatment. The refining method of by-product industrial salt comprises the following steps: (1) melting the by-product industrial salt in a mixing reactor, so that a saturated solution is obtained; (2) adding coagulating agent into the mixing reactor through the dosing nozzle of the mixing reactor, then raising the stirring rate to 210-350 round / minute to continuously react for 2-3 hours, wherein the addition amount of the coagulating agent is 2-5wt% that of the saturated solution obtained in step (1); (3) sending the mixture into an air-floatation machine to remove the suspended matters in the upper layer, so that a clear solution is obtained; (4) orderly filtrating the clear solution by a multi-media filter and an activated-carbon filter; and (5) evaporating the crystals and filtrating to obtain the purified table salt. The refining method of by-product industrial salt provided by the invention is rational in process route, simple to operate, relatively low in cost and capable of effectively refining the by-product industrial salt.

Description

technical field [0001] The invention relates to the technical field of by-product industrial salt treatment, in particular to a method for refining by-product industrial salt. Background technique [0002] At present, the by-product industrial salt contains a small amount of organic matter, which is difficult to be effectively treated and utilized, and cannot be directly used as a raw material for downstream products. Most manufacturers can only stockpile it or send it to a solid waste treatment center for processing. At present, the treatment cost of the solid waste treatment center is as high as 3,000-4,000 yuan / t, which is unbearable for enterprises, and the landfill is mainly treated with anti-corrosion and anti-seepage treatment before landfilling. This treatment method not only occupies land, but is also a great waste of resources, and there is a potential risk of posing a huge threat to the environment. Once the anti-corrosion and anti-seepage layer leaks, soluble sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L27/40C01D3/14
CPCC01D3/14
Inventor 孙国庆高技峰李志清宋吉奎凌晓光杨尚祚马华青侯永生孙国冉李盼盼邹宗加王杜瑞张文华
Owner SHANDONG WEIFANG RAINBOW CHEM
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