Boron-doped diamond electrode electrooxidation system and method for treating fracturing flow-back fluid

By integrating pretreatment and exhaust gas absorption into the system design, the problems of high chloride ions, strong reducing sulfides, and foam in fracturing flowback fluid were solved, achieving efficient and stable fracturing flowback fluid treatment and reducing operating costs.

CN121800370APending Publication Date: 2026-04-07福州科煌生态环保科技有限公司
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Patent Information

Application Number
CN202610161115.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing boron-doped diamond electrode electro-oxidation equipment faces problems such as high chloride ion content leading to hypochlorite formation, strong reducing sulfides clogging the electrode, and foam interference when processing fracturing flowback fluid, resulting in low processing efficiency, high cost, and poor system stability.

Method used

The system adopts an integrated pretreatment, exhaust gas absorption and circulation design. Sulfides and foam are removed by aeration devices, and hypochlorous acid is recycled using chlorine recovery pipelines. The integrated aeration device and electro-oxidation unit form a closed system and optimize the treatment process.

Benefits of technology

It effectively removes sulfides and foam, protects electrodes, reduces operating costs, improves oxidation efficiency and system stability, and enables resource recycling.

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Abstract

The invention relates to the technical field of oil and gas fracturing flow-back fluid treatment, and particularly discloses a boron-doped diamond electrode electrooxidation system and method for treating fracturing flow-back fluid. According to the method for treating the fracturing flow-back fluid, before the fracturing flow-back fluid enters an electrooxidation unit, sulfide is efficiently removed, poison and competitive oxidation of the fracturing flow-back fluid to an electrode are eliminated, a BDD electrode is protected, a foaming agent is synchronously removed through aeration enrichment, the problem of foam interference in the flow-back fluid treatment process is fundamentally solved, and continuous and stable operation of a system is guaranteed; after the electro-oxidation unit, active chlorine (pypocholoride / chlorine) is effectively removed and recycled, so that waste is treated by waste, the oxidation efficiency is improved, and the dosage of chemicals is reduced. Through the collaborative design, the interference and foam problems of sulfide with high chloride ion content and strong reducibility are collaboratively optimized, and the treatment efficiency, economical efficiency and stability of the system are integrally improved.
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