Microwave photocatalytic device for degrading wastewater and being capable of keeping high treatment efficient continuously

Abstract

The invention relates to a microwave photocatalytic device for degrading wastewater and being capable of keeping high treatment efficient continuously, and belongs to the technical field of wastewater treatment. In the conventional microwave photocatalytic degrading technology for the industrial wastewater containing organic contaminants, the outer lateral surface of a quartz tube for shielding a non-polar ultraviolet lamp in a device is soaked in wastewater liquid for a long time so as to generate a scale phenomenon, the permeability of the quartz tube about the ultraviolet light is seriously influenced due to the existence of the scale layer, and the treatment efficient of a microwave photocatalytic reaction device is greatly reduced. The microwave photocatalytic device aims at solving the problem. According to the invention, an ultrasonic transducer provided with a cage-shaped microwave shielding cover is arranged on the inner lateral surface of the sidewall of a microwave photocatalytic reactor, on the premise of not stopping and not disassembling, the scale on the outer lateral surface of the quartz tube is instantly ultrasonically cleared through ultrasonic conveyance of a liquid medium, therefore the high permeability of the quartz tube about the ultraviolet light is kept, and the continuous high efficiency of the microwave photocatalytic degrading reaction device is maintained.

Description

technical field [0001] The invention relates to a microwave photocatalytic device for wastewater degradation capable of continuously maintaining high treatment efficiency, and belongs to the technical field of CO2F wastewater treatment. Background technique [0002] Microwave photocatalytic degradation treatment technology, as an effective harmless treatment technology for industrial wastewater containing organic pollutants, has developed rapidly in recent years. [0003] Regarding the microwave photocatalytic degradation technology, as an example, refer to the Chinese patent application with publication number CN102260003A. [0004] The Chinese patent application with the publication number CN102260003A uses microwaves as the excitation source to excite the electrodeless ultraviolet lamp to emit ultraviolet rays, and irradiates the suspension mixed with photocatalyst titanium dioxide inside the liquid. The electrodeless ultraviolet lamp is shrouded and protected by a quartz...

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Problems solved by technology

[0006] As mentioned above, in the device structure expressed in the Chinese patent application with the publication number CN102260003A, the outer wall of the quartz tube used for shielding the electrodeless ultraviolet lamp refers to the outer wall of the quartz tube. The contact with industrial wastewater will inevitably accumulate scale gradually. Of course, the scaled substances are mainly inorganic impurities that are not easily touched by photocatalytic reactions. The scaling phenomenon formed by this mechanism is easy to be observed after the equipment has been running for a long time Although the scale layer attached to the outer wall of the quartz tube is only a thin layer, it is enough to cause significant blocking to the ultraviolet radiation of the electrodeless ultraviolet lamp, which will cause the actual treatment effect of this microwave photocatalytic reaction treatment device It is greatly reduced; during the use of the laboratory scale, the above-mentioned fouling problem is not easy to detect, but on the industrial application scale, the fouling problem will undoubtedly be highlighted; Under the premise, it has become an important technical issue worthy of attention to immediately and effectively remove the fouling layer on the outer wall of the quartz tube and maintain the continuous high efficiency of the microwave photocatalytic treatment device.

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