Electric catalysis reactor capable of reducing side reaction for wastewater treatment

Abstract

The invention discloses an electric catalysis reactor capable of reducing side reaction for wastewater treatment. The reactor consists of a pot body (1), an exhaust valve (2), a stirring mechanism (comprising a motor (3), a speed adjustor (4), a stirring shaft (5) and a stirring paddle (8)), a water inlet (5), a cathode / anode sheet group (7), a filter plate (9), a water outlet (10) and the like. A three-dimensional particle electrode is filled inside the reactor, and three-dimensional particles can be suspended between flat electrodes in a controllable stirring mode so as to effectively play a role in catalysis of the particle electrode, improve the generation rate of hydroxyl free radicals and reduce the occurrence of side reaction. Meanwhile, the controllable stirring mode improves the mass transfer effect of the solution, prevents dirt from being accumulated on the flat electrodes, and reduces the ohmic thermal resistance effect of electrodes. The electric catalysis reactor is applicable to degradation and purification treatment of high-concentration organic wastewater difficult to be biochemically degraded, high-chroma and high-ammonia nitrogen wastewater and oily wastewater, overcomes the defects that the prior equipment for treating the high-concentration organic wastewater has poor effect, high cost and the like, and has the advantages of simple and convenient operation, cleanness, thorough oxidation, stable treatment effect and the like.

Description

Technical field [0001] The invention relates to a wastewater treatment device, and more specifically belongs to an electrochemical wastewater treatment device. technical background [0002] Refractory organic wastewater has become the focus and difficulty in the field of wastewater treatment because of its high chroma, high toxicity (teratogenic, carcinogenic, mutagenic), high ammonia nitrogen, and difficult biochemical degradation. Usually, the main methods for treating refractory organic wastewater include incineration, supercritical water oxidation, wet air oxidation, photochemical oxidation and ultrasonic chemical oxidation, but all of them have disadvantages such as high treatment cost, large equipment investment and low treatment efficiency. Electrocatalytic water treatment technology can generate strong oxidizing hydroxyl radicals (OH) and other particles with strong oxidizing properties in the electrochemical process, which can break the molecular chains of organic m...

AI Technical Summary

Problems solved by technology

In order to keep the particle electrode in a suspended state, the patents "ZL 200620097876.3", "CN 1654340A" and so on are realized by aeration, but aeration often weakens the catalytic efficiency of electrocatalysis. The reasons are: (1) aeration will make a large number of air bubbles Migrating to the surface of the electrode, resulting in a decrease in the effective area of ​​the electrode in contact with the wastewater; (2) The reduction in the effective area of ​​the electrode causes the local current of the electrode to be too large, resulting in an increase in the side reaction of oxygen evolution; (3) Aeration may cause cavitation corrosion of the electrode

In addition, solution circulation or solution flow can also be used to promote particle suspension, but there are often dead angles, which cause particle accumulation or are not conducive to particle recycling.

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