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Epoxy resin high-salinity wastewater treatment method

A technology for epoxy resin and high-salt wastewater, applied in natural water treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult treatment, inability to use caustic soda for production, and high organic content , to achieve the effect of avoiding pollution, considerable economic benefits, and saving processing costs

Inactive Publication Date: 2012-12-12
JIANGSU KUMHO YANGNONG CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic and organic pollutants such as toluene, salt, and aging resin in high-salt wastewater make COD as high as 1.0×10 4 mg / l, which is extremely difficult to deal with, and has become a bottleneck restricting the development of the domestic epoxy industry; although foreign capital or joint ventures have advanced production and synthesis technologies, they are also equipped with evaporation and recovery salt devices, but the recovered salt contains high organic content and cannot be used. Used in the production of caustic soda, generally used as deicing agent and printing and dyeing auxiliaries, which indirectly pollutes the environment

Method used

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  • Epoxy resin high-salinity wastewater treatment method
  • Epoxy resin high-salinity wastewater treatment method
  • Epoxy resin high-salinity wastewater treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. The quality of epoxy resin high-salt wastewater

[0025] Epoxy resin high salt wastewater quality

[0026] index pH TOC (mg / L) COD (mg / L) Salt (%) parameter 13.5 2764 5251 19

[0027] 2. Processing process and results

[0028] 2.1 Pass 1000Kg of epoxy resin high-salt wastewater through the micro-nano bubble generator, cooperate with ozone aeration, the reaction time is 4 hours, the suspended solids in the water are obviously precipitated, and the TOC in the tested water is 2414ppm after filtration.

[0029] 2.2 Take the water after micro-nano treatment, add activated carbon for adsorption, the amount of activated carbon is 0.3% (mass ratio) of the water, the reaction temperature is 70°C, and the stirring time is 40min. After the reaction, the activated carbon was removed by ordinary filtration. The effluent TOC is 2198ppm.

[0030] 2.3 Adjust the pH value to 3 with hydrochloric acid, add FeSO 4 ·7H 2 O 2.5Kg...

Embodiment 2

[0036] 1. The quality of epoxy resin high-salt wastewater

[0037] Epoxy resin high salt wastewater quality

[0038] index pH TOC (mg / L) COD (mg / L) Salt (%) parameter 13.5 3069 5712 19.4

[0039] 2. Processing process and results

[0040] 2.1 Pass 1000Kg of epoxy resin high-salt wastewater through the micro-nano bubble generator, cooperate with ozone aeration, the reaction time is 4 hours, the suspended solids in the water are obviously precipitated, and the TOC in the tested water is 2522ppm after filtration.

[0041] 2.2 Take the water after micro-nano treatment, add activated carbon for adsorption, the amount of activated carbon is 0.5% (mass ratio) of the water, the reaction temperature is 70°C, and the stirring time is 40min. After the reaction, the activated carbon was removed by ordinary filtration. The effluent TOC is 2042ppm.

[0042] 2.3 Adjust the pH value to 3 with hydrochloric acid, add FeSO 4 ·7H 2 O 2.2...

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Abstract

The invention relates to an epoxy resin high-salinity wastewater treatment method, which comprises the following steps of: 1) removing aged resin in the epoxy resin high-salinity wastewater by the use of a micro-nano bubble generator; 2) using active carbon for decolouring such that TOC of the epoxy resin high-salinity wastewater is less than 2200 ppm; 3) adding hydrochloric acid into the outputted wastewater obtained from the step (2) so as to adjust pH value to 2-4, adding a Fenton's reagent for Fenton oxidation reaction, wherein the mol ratio of ferroporphyrin to hydrogen peroxide is 0.01-0.5; 4) adjusting the pH value of the outputted wastewater obtained from the step (3) to 9-10, adding a HPAC coagulant for coagulating sedimentation reaction so as to obtain a supernatant, making TOC of the epoxy resin high-salinity wastewater less than 200 ppm; 5) carrying out membrane filtration on the outputted wastewater obtained from the step (4), and removing visible impurities from the epoxy resin water; and 6) carrying out diaphragm electrolysis on the outputted water obtained from the step (5). The treatment method provided by the invention is environmentally friendly and economical.

Description

technical field [0001] The invention relates to a method for treating epoxy resin high-salt wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Bisphenol A basic epoxy resin is a product synthesized with epichlorohydrin, bisphenol A, and liquid caustic soda as the main raw materials under catalyst and certain process conditions. The by-product of the process is sodium chloride; Sodium chloride is a by-product in the medium, so it is necessary to separate the epoxy resin and sodium chloride by adding water and dissolving in a solvent, so a large amount of saline wastewater will be produced. Salt-containing wastewater consists of two parts ① high-concentration saline-containing wastewater produced during the resin washing process. The wastewater is a mixture of high-concentration organic wastewater and inorganic wastewater. Among them, the organic matter is a macromolecular intermediate product in the process of generating epox...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/38
Inventor 宋数宾杨颖孙祥黄得庆魏天予马良
Owner JIANGSU KUMHO YANGNONG CHEM CO LTD
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