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Treatment method and device for effluent brine

A treatment method and technology of a treatment device, which are applied in the directions of processing wastewater treatment, textile industry wastewater treatment, multi-stage water treatment, etc., can solve the problems of difficult reuse, polyvalent ions and organic pollutants, etc. Higher, saving effect of the amount of alkali

Pending Publication Date: 2019-07-05
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this waste sodium chloride salt contains more divalent ions and organic pollutants, so it is not easy to realize utilization again

Method used

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  • Treatment method and device for effluent brine
  • Treatment method and device for effluent brine
  • Treatment method and device for effluent brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The wastewater treated in this example is the waste brine obtained after the blue anthraquinone disperse dye wastewater of a certain printing and dyeing factory undergoes biochemical, oxidation, and membrane concentration, and the mixed waste brine produced by a paper mill. Wastewater brine water quality: the average concentration of ammonia nitrogen is 1.06mg / L, the concentration of COD is 164.5mg / L, the content of sodium chloride is 1800mg / L, the concentration of sulfate ions is 850mg / L, the concentration of calcium ions is 65mg / L, the concentration of magnesium ions 50mg / L.

[0083] (1) The mixed waste brine is discharged into the slurry tank, mixed and reacted with the dosing agent containing sodium hydroxide and sodium carbonate, and the concentration of NaOH is higher than the Mg in the completely precipitated brine 2+ Concentration greater than 0.1g / L, Na 2 CO 3 The dosing concentration is higher than the Ca in the complete precipitation brine 2+ and Ba 2+ Th...

Embodiment 2

[0090] The wastewater treated in this example is the waste brine obtained after the blue anthraquinone disperse dye wastewater of a certain printing and dyeing factory undergoes biochemical, oxidation, and membrane concentration, and the mixed waste brine produced by a paper mill. Wastewater brine water quality: the average concentration of ammonia nitrogen is 1.06mg / L, the concentration of COD is 164.5mg / L, the content of sodium chloride is 1800mg / L, the concentration of sulfate ions is 850mg / L, the concentration of calcium ions is 65mg / L, the concentration of magnesium ions 50mg / L.

[0091] (1) The mixed waste brine is discharged into the slurry tank, mixed and reacted with the dosing agent containing sodium hydroxide and sodium carbonate, and the concentration of NaOH is higher than the Mg in the completely precipitated brine 2+ Concentration greater than 0.20g / L, Na 2 CO 3 The dosing concentration is higher than that of Ca in completely precipitated brine 2+ and Ba 2+ ...

Embodiment 3

[0098] The wastewater treated in this example is the waste brine obtained from the 2,3-dichloro-6-carboxylchloroquinoxaline reactive dye wastewater of a printing and dyeing factory after biochemical, oxidation and membrane concentration and the mixed waste brine produced by the paper mill . Wastewater brine water quality: the average concentration of ammonia nitrogen is 1.55mg / L, the concentration of COD is 198.2mg / L, the content of sodium chloride is 1950mg / L, the concentration of sulfate ion is 1040mg / L, the concentration of calcium ion is 78mg / L, the concentration of magnesium ion 65mg / L, and 0.15wt% of 2,3-dichloro-6-carboxylic acid chloroquinoxaline.

[0099] (1) The mixed waste brine is discharged into the slurry tank, mixed and reacted with the dosing agent containing sodium hydroxide and sodium carbonate, and the concentration of NaOH is higher than the Mg in the completely precipitated brine 2+ Concentration greater than 0.15g / L, Na 2 CO 3 The dosing concentration ...

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Abstract

The invention provides a treatment method and device for effluent brine. The method includes: selecting effluent brine as the raw material, adding reagents to remove calcium and magnesium ions, then using a ceramic membrane for filtering, employing resin for advanced treatment of the filtered clear liquid, then separating monovalent and bivalent ions by nanofiltration, and then conducting concentration twice with a reverse osmosis membrane and a high pressure resistant reverse osmosis membrane, and converting the obtained final concentrated solution by a bipolar membrane into acid and alkalinesolutions. Compared with the conventional evaporation method, the method provided by the invention for treatment of effluent brine realizes recycling of the produced acid and alkali, and realizes resource utilization of waste salts.

Description

technical field [0001] The invention relates to a treatment method and device for waste salt water, belonging to the technical field of waste salt treatment. Background technique [0002] According to reports, the average daily discharge of wastewater from textile-related industries in my country is roughly 5 to 5.5 million tons, and these enterprises will produce 3 to 4.5 tons of wastewater for every 100 meters of textiles processed. Hundreds of thousands of tons of waste water is discharged directly into rivers and lakes without treatment or if the treatment is not up to standard. Due to the high salt content of printing and dyeing wastewater, its TDS may reach 4000-11000mg / L. If it is discharged directly, the river water will be polluted and the river water cannot be used for agricultural irrigation. [0003] At present, printing and dyeing enterprises generally adopt the treatment process of ozone oxidation + biological aerated filter + multi-media filtration + activ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/06C02F103/28C02F103/30
CPCC02F9/00C02F1/5236C02F1/5245C02F1/442C02F1/441C02F2301/08C02F2103/28C02F2103/30C02F1/44C02F1/24C02F1/38C02F1/001C02F2001/007C02F1/42C02F2001/425C02F1/4693Y02A20/131
Inventor 曹恒霞彭文博周思晨熊福军白祖国孙桂花吴正雷杨积衡范克银党建兵
Owner JIANGSU JIUWU HITECH
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