Process for treating mixed waste salt through chemical oxidation method

A technology of chemical oxidation and treatment process, which is applied in the direction of chemical instruments and methods, solid waste removal, transportation and packaging, etc. It can solve the problems of easy ringing and agglomeration of waste salt slag, corrosion of equipment, high energy consumption, etc., and achieve the reduction of operation Effects of burden, applicability, and low investment

Active Publication Date: 2020-07-31
浙江红狮环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The key to the treatment of mixed waste salt is to remove the organic pollutants in the waste salt. The above methods and the prior art usually use high-temperature burning to remove the organic pollutants and recycle the industrial waste salt. The method has high energy consumption and the waste salt slag is During the process, it is easy to form rings and agglomerates, causing problems such as corrosion of equipment

Method used

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  • Process for treating mixed waste salt through chemical oxidation method
  • Process for treating mixed waste salt through chemical oxidation method
  • Process for treating mixed waste salt through chemical oxidation method

Examples

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Effect test

Embodiment 1

[0030] A mixed waste salt chemical oxidation treatment process, the main scheme of which is:

[0031] Add 1000kg of mixed waste salt to 1000kg of water, mix and stir in the mixing tank for 10 minutes to obtain waste salt slurry, separate and remove the floating organic pollutants in the upper layer after standing for 30 minutes, and then add the waste salt slurry to the chemical oxidation reactor, Control the temperature at 40°C and stir for 10 minutes. After the waste salt slurry is uniform, add a pH regulator to adjust the pH value of the waste salt slurry to 3. Then mix 12kg of oxidant, 0.1kg of oxidation accelerator and 0.5kg of chemical oxidation catalyst, and then slowly Add it into the chemical oxidation reactor, control the addition for 30 minutes, add a pH regulator to control the pH value of the slurry to 3, control the temperature at 50°C after completion, react for 60 minutes, cool to room temperature after the reaction is complete, filter, dry, and remove the catal...

Embodiment 2

[0045] A mixed waste salt chemical oxidation treatment process, the main scheme of which is:

[0046] Add 1300kg of mixed waste salt to 1500kg of water, mix and stir in the mixing tank for 40 minutes to obtain a waste salt slurry, separate and remove the floating organic pollutants in the upper layer after standing for 40 minutes, and then add the waste salt slurry to the chemical oxidation reactor, Control the temperature at 50°C and stir for 15 minutes. After the waste salt slurry is uniform, add a pH regulator to adjust the pH value of the waste salt slurry to 4. Then mix 24kg of oxidant, 0.4kg of oxidation accelerator and 0.8kg of chemical oxidation catalyst and then slowly Add it into the chemical oxidation reactor, control the addition for 40 minutes, add a pH regulator to control the pH value of the slurry to 4, control the temperature at 60°C after completion, react for 120 minutes, cool to room temperature after the reaction is complete, filter, dry, and remove the cat...

Embodiment 3

[0058] A mixed waste salt chemical oxidation treatment process, the main scheme of which is:

[0059] Add 1500kg of mixed waste salt to 2000kg of water, mix and stir in the mixing tank for 60 minutes to obtain a waste salt slurry, separate and remove the floating organic pollutants in the upper layer after standing for 60 minutes, and then add the waste salt slurry to the chemical oxidation reactor, Control the temperature at 60°C, stir for 20 minutes, add a pH adjuster after the waste salt slurry is uniform, adjust the pH value of the waste salt slurry to 5, then mix 30kg of oxidant, 0.8kg of oxidation accelerator and 1kg of chemical oxidation catalyst evenly and then slowly add In the chemical oxidation reactor, control the addition of 60 minutes, add a pH value regulator to control the pH value of the slurry to 5, control the temperature at 80°C after completion, react for 180 minutes, cool to room temperature after the reaction is complete, filter, dry, remove the catalyst,...

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Abstract

The invention relates to the field of environmental protection, in particular to a process for treating mixed waste salt through a chemical oxidation method. The process comprises the steps that wastesalt slurry is formed firstly; solid salt and dissolved salt are in a dissolution-crystallization equilibrium state, and toxic substances contained in the waste salt are further scattered in water; then, a large amount of insoluble organic pollutants are separated with a layering technology, and the operation load of chemical oxidation is reduced; the usage amounts of oxidizing agents, additivesand catalysts are reduced; and next, residual organic pollutants are removed under the effect of magnetic chemical oxidation catalysts completely. According to the process, evaporation and concentration of waste water are not required, and high-temperature calcination is not required, either; the energy consumption of the process is low, and the process is suitable for treating different kinds ofmixed waste salt, and is high in applicability; the problem for treating the waste salt in the chemical industry, pesticide industry, pharmaceutical industry, dye industry and other industries can besolved, and the process is a waste salt harmless treatment method with low investment and energy consumption.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a mixed waste salt chemical oxidation treatment process. Background technique [0002] With the development of industry, the demand for industrial salt has greatly increased. The use of industrial salt will inevitably lead to the production of a large amount of industrial by-product salt in related industries. These waste salt residues contain various toxic substances. In the past, these waste salts were piled up everywhere as solid waste or discharged into the environment to pollute the environment. [0003] CN1261716C relates to a treatment method of cyanide-containing waste salt slag. The process steps are: adding cyanide-containing waste salt slag to a dryer for heating, the heating temperature is controlled at 60-120°C, methanol or ethanol is volatilized from the waste slag, methanol or ethanol After the gas is cooled by the condenser, high-purity methanol or ethanol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B3/40
Inventor 李春萍黄敏锐唐柯黄学慧郭晓露陈慧斌
Owner 浙江红狮环保股份有限公司
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