Waste ion exchange resin treatment method and system

A technology for exchanging resins and treatment methods, applied in the direction of electric regeneration, etc., which can solve the problems of high treatment costs, affecting resin oxidation, large amount of catalyst and hydrogen peroxide, etc.

Pending Publication Date: 2020-01-21
BEIJING BIOTECHINA ENVIRONMENT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the reaction temperature is high, generally around 100°C, hydrogen peroxide decomposes quickly, and the amount of catalyst and hydrogen peroxide required is relatively large, and during the reaction process, there will be a large amount of foam production, which will affect the oxidation of the resin. It is necessary to continuously add defoaming agents, resulting in the proble...

Method used

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  • Waste ion exchange resin treatment method and system
  • Waste ion exchange resin treatment method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0066] 33g of ferrous sulfate and 320mL of waste ion exchange resin were added to the oxidation reaction kettle 15, and 9L of deionized water was passed into the water inlet pump 13, and the stirring was started. After the temperature was raised to 70°C, hydrogen peroxide (30% ) 500g, after one hour, the resin has been dissolved in the liquid. This solution is drained into buffer tank 16 . Then enter the electrolytic reaction tank 22 through the electrolytic oxidation liquid inlet pump 21 for further advanced treatment. The current was set to 100A, the initial voltage was 4.5V, and after electrolytic oxidation for 6 hours, the measured COD of the solution was 95mg / L. The solution enters the mixed sedimentation tank 31 through the electrolytic oxidation outlet pump 23, and sodium hydroxide is added to adjust the pH to 7, and then the wastewater is post-treated.

Embodiment 2

[0068]33g of ferrous sulfate and 320mL of waste ion exchange resin were added to the oxidation reaction kettle 15, and 9L of deionized water was passed into the water inlet pump 13, and the stirring was started. After the temperature was raised to 70°C, hydrogen peroxide (30% ) 1000g, after two hours, the resin has been dissolved in the liquid. This solution is drained into buffer tank 16 . Then enter the electrolytic reaction tank 22 through the electrolytic oxidation liquid inlet pump 21 for further advanced treatment. The current was set to 100A, the initial voltage was 4.5V, and after electrolytic oxidation for 5 hours, the measured COD of the solution was 340mg / L. The solution enters the mixed sedimentation tank 31 through the electrolytic oxidation outlet pump 23, and sodium hydroxide is added to adjust the pH to 7, and then the wastewater is post-treated.

Embodiment 3

[0070] 22g of ferrous sulfate and 320mL of waste ion exchange resin were added to the oxidation reaction kettle 15, and 9L of deionized water was passed into the water inlet pump 13, and the stirring was started. After the temperature was raised to 70°C, hydrogen peroxide (30% ) 500g, after one hour, the resin has been dissolved in the liquid. This solution is drained into buffer tank 16 . Then enter the electrolytic reaction tank 22 through the electrolytic oxidation liquid inlet pump 21 for further advanced treatment. The current was set to 100A, the initial voltage was 4.5V, and the COD of the solution was measured to be 425mg / L after electrolytic oxidation for 6h. The solution enters the mixed sedimentation tank 31 through the electrolytic oxidation outlet pump 23, and sodium hydroxide is added to adjust the pH to 7, and then the wastewater is post-treated.

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Abstract

The invention relates to a waste ion exchange resin treatment method, which comprises: S1, mixing waste ion exchange resin, a catalyst and water, and stirring; S2, under normal pressure, heating to 50-100 DEG C, and gradually adding an oxidant until the waste ion exchange resin is completely dissolved; S3, subjecting the solution to electrolytic oxidation treatment for a certain period of time under the constant current and voltage; and step S4, adding an alkali into the solution to adjust the pH value to 7 to solidify and remove ions in the water. Using the above method, the method solid waste ion exchange resin is oxidized and dissolved through hydrogen peroxide, and then deep oxidation treatment is performed on the solution through electrolytic oxidation so as to form the novel waste ion exchange resin treatment method. A large amount of oxidizing agents do not need to be added, the treatment cost is reduced, harmful gas and waste cannot be generated in the treatment process, secondary pollution cannot be caused, the treated water quality is simple, and the COD value is low.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a treatment system and method for waste ion exchange resins. Background technique [0002] Ion exchange resin is a polymer compound with functional groups, network structure and insolubility. The currently used resins mainly include strongly acidic cation resins and strongly basic anion resins, both of which are copolymers of styrene (Styrene) and divinylbenzene (Divinylbenzene). Among them, the cation resin (R-SO3H) has active sulfonic acid groups, while the anion resin (R-CH2N(CH3)3+) has active quaternary ammonium groups. Ion exchange resins are mainly spherical and powdered. Powdered resins are often used to cover filter elements. In addition to providing ion exchange functions, they can also remove suspended solid particles in water. Powdered resin will contain a large amount of solid impurities after one use, so it is usually not regenerated, and it will ...

Claims

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Application Information

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IPC IPC(8): B01J49/30
CPCB01J49/30
Inventor 李国文洪挺张学辉程广林兰易
Owner BEIJING BIOTECHINA ENVIRONMENT CORP
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