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Method for deeply refining saline water by resource utilization of waste salt

A deep refining and resource-based technology, applied in chemical instruments and methods, preparation forms of alkali metal sulfite/sulfate, oxidized water/sewage treatment, etc., can solve problems such as waste salt recovery methods that need to be improved, and achieve environmental relief Effect of pressure, good economic value

Inactive Publication Date: 2021-06-18
JIANGSU RUIDA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for resource utilization of waste salt and deep refining of brine, which solves the problem that existing waste salt recovery methods in the prior art need to be improved

Method used

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  • Method for deeply refining saline water by resource utilization of waste salt

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Embodiment 1

[0026] refer to figure 1 , a method for resource utilization of waste salt and deep refining of brine, comprising the following steps:

[0027] The first step: transport the waste salt to the salt tank, add water to stir and dissolve to obtain crude brine; transport the waste salt to the salt tank through a belt conveyor, and add water to add tap water or add recycled water;

[0028] Step 2: Put the coarse brine in the first step into the silicon and hardness removal system, add chemical agents, and the effluent of the silicon removal and hardness removal system contains some ash, calcium salt and magnesium salt particles that have not completely settled; the brine passes through The lift pump enters the silicon and hard removal system; the chemical agents added to the silicon and hard removal system are calcium oxide, magnesium oxide and sodium carbonate; the main chemical reactions involved include the following: ; ; ;

[0029] The third step: the effluent from the se...

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Abstract

The invention discloses a waste salt resource utilization brine deep refining method which comprises the following steps: 1, conveying waste salt into a salt dissolving barrel, adding water, stirring and dissolving to obtain crude brine; 2, the crude brine obtained in the step 1 is put into a silicon removal and hardness removal system, a chemical agent is added, and effluent of the silicon removal and hardness removal system contains part of ash and small particles of calcium salt and magnesium salt which are not completely settled. According to the method, the incinerated waste salt is subjected to silicon removal, hardness removal, advanced oxidation, resin adsorption and other treatments, the obtained brine effluent can be subjected to evaporation treatment, the condensate can be recycled to a crude salt dissolution section, the evaporated and crystallized salt is a product, the whole set of advanced treatment process ensures the product quality of the evaporated and crystallized salt, the reasonable recycling of the waste salt is realized, the environmental pressure is relieved, and the economic value is very good.

Description

technical field [0001] The invention relates to a method for deep refining of waste salt resource utilization brine. Background technique [0002] Waste salt is mainly produced during the treatment of high-salt wastewater. Researchers have developed various high-salt wastewater treatment methods, such as: electrolysis, membrane separation, biological treatment, evaporation and crystallization, etc. The technology commonly used in the terminal processing process. Although water resources can be treated and reused to achieve zero discharge, this method does not remove pollutants, but only transfers pollutants to crystallized miscellaneous salts. The waste salt produced after treatment is the difficulty in governance. Especially in petroleum industry, coal chemical industry, medicine, printing and dyeing and other industries, the residue after high-salt wastewater treatment contains a variety of toxic and harmful organic substances and inorganic salts such as sodium chloride ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F11/122C01D3/08C01D3/22C01D5/00
CPCC02F9/00C02F11/122C01D3/22C01D3/08C01D5/004C02F1/60C02F5/00C02F5/06C02F1/52C02F1/24C02F1/66C02F1/42C02F1/78C02F1/58
Inventor 周乔马晨皓张磊王志朱良邱丽娟方达宋化忠李鹏程郗静王小川蒋新娣
Owner JIANGSU RUIDA TECH CO LTD
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