Method for degrading MDEA wastewater

By adding hydrogen peroxide and hypochlorite at the wet oxidation stage, the degradation of MDEA wastewater is accelerated in a synergistic manner, and the problem of difficult degradation of MDEA wastewater in the prior art is solved, efficient wastewater treatment within a wide pH range is achieved, and the use of conventional catalysts is avoided.

CN119841430APending Publication Date: 2025-04-18CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202311351558.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-10-18
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

The prior art is difficult to effectively degrade MDEA wastewater, especially under high pH conditions, homogeneous catalysts may precipitate, resulting in reduced treatment efficiency and pipeline blockage.

Method used

In the wet oxidation stage, hydrogen peroxide and hypochlorite are added simultaneously to exert a synergistic effect, accelerate the induction period of wet oxidation, improve the conversion of organic nitrogen, and use the hypochlorite present in the water to achieve waste control.

Benefits of technology

It realizes efficient degradation of high COD value MDEA wastewater, improves the removal rate of organic nitrogen, has a wide pH application range, and does not require the addition of solid catalysts or homogeneous catalysts, avoiding contamination of conventional metal ions.

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Abstract

The invention relates to a method for degrading MDEA wastewater, which comprises the following steps: enabling hydrogen peroxide and hypochlorite to exist in the wastewater at the same time, introducing oxygen or air into the wastewater, treating the MDEA wastewater by adopting a wet oxidation method, and degrading MDEA. For MDEA wastewater difficult to treat, hydrogen peroxide and pypocholoride are added at the same time in the wet oxidation stage, the hydrogen peroxide and pypocholoride can play a synergistic role, singlet oxygen can be generated when the hydrogen peroxide and pypocholoride exist at the same time, the induction period of wet oxidation can be accelerated, conversion of organic nitrogen can be improved, meanwhile, hypochlorite existing in some water can be utilized, and the treatment effect of the MDEA wastewater is improved. Waste is treated by waste, and additional treatment is not needed. By adopting the method disclosed by the invention, the treated COD (Chemical Oxygen Demand) can reach up to 80000mg / L, and the wet oxidation treatment conditions are reduced.
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Citation Information

Patent Citations

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