Wastewater treatment system and method for catalytic wet oxidation

By using a vortex bubble generator to form micro-nano bubbles in a catalytic wet oxidation reactor, the problems of high mass transfer resistance, high cost, and easy catalyst deactivation in the treatment of high-salt organic wastewater are solved, achieving efficient wastewater treatment and oxygen utilization.

CN121292690APending Publication Date: 2026-01-09滨化技术有限公司
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Patent Information

Application Number
CN202511306819.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-12
Publication Date
2026-01-09

AI Technical Summary

Technical Problem

In the treatment of high-salt organic wastewater, catalytic wet oxidation suffers from problems such as high mass transfer resistance, high cost, easy catalyst deactivation, and low treatment efficiency. The application of micro-nano bubbles under high temperature and high pressure conditions has been rarely reported.

Method used

A specific vortex bubble generator structure is adopted to allow oxygen to enter the catalytic wet oxidation reactor in the form of micro-nano bubbles. The enhanced vortex is formed by the guide slits and guide spirals of the vortex bubble generator. Combined with the micron-sized sieve holes of the gas distribution pipe, the generation efficiency of micro-nano bubbles is improved. Furthermore, more micro-nano bubbles are generated in the vortex zone formed in the inner vortex cylinder and the expanded diameter pipe section.

Benefits of technology

It improves the treatment efficiency of high-salt organic wastewater, reduces oxygen consumption, prolongs oxygen residence time, increases gas-liquid mass transfer rate and free radical generation rate, and reduces operating costs.

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Abstract

The invention discloses a wastewater treatment system and method for catalytic wet oxidation, and the treatment system comprises a vortex bubble generator; the oxidation reactor is positioned at the downstream of the vortex bubble generator; the heater is positioned at the upstream of the vortex bubble generator; and a preheater located upstream of the heater. According to the treatment system disclosed by the invention, the vortex effect of the wastewater is enhanced under the dual effects of the flow guide slit and the flow guide spiral of the vortex bubble generator, and the micro-nano bubble generation efficiency is improved. In the catalytic wet oxidation reaction process, oxygen enters the oxidation reactor in the form of micro-nano bubbles, and compared with millimeter-scale bubbles in a traditional gas distribution mode, the retention time of the oxygen is prolonged, the specific surface area of the bubbles is large, the gas-liquid mass transfer rate is increased, the generation rate of free radicals is increased, and the catalytic wet oxidation reaction efficiency is improved. Meanwhile, oxygen enters the oxidation reactor in the form of micro-nano bubbles, so that the consumption of the oxygen is reduced while the reaction efficiency is improved.
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