High-capacity reactor with catalyst agglomerate digestion mechanism for photocatalytic wastewater degradation

Abstract

The invention relates to a high-capacity reactor with a catalyst agglomerate digestion mechanism for photocatalytic wastewater degradation, and belongs to the technical field of wastewater treatment. In the existing related technologies, the problems that microwave energy is wasted, the treatment amount for single-tank wastewater is low, the intensity of internal general circulation is insufficient, the rising route of air bubbles is short, the oxygen supply concentration degree of key areas is low, an entrapment phase for catalyst particles is weak, the endpoint time of a degradation reaction is difficult to distinguish, catalyst agglomerates cannot be powerfully digested in situ, and the like exist, and the scheme disclosed by the invention aims at the series of problems. In the scheme, microwave is restrained by a metal cage, and the structure allows large-amplitude capacity expansion for the reactor; oxygen supply for key areas is enhanced by the structure of the scheme; the structure comprises an external cascaded three-stage backwash-type filter used for entrapping the catalyst; and the structure is capable of powerfully digesting the catalyst agglomerates in situ, ultrasonically cleaning a quartz tube, and automatically turning off the related power supply immediately when the degradation reaction arrives at the endpoint, thus avoiding energy waste and secondary pollution.

Description

technical field [0001] The invention relates to a large-capacity reactor for photocatalytic waste water degradation containing a catalytic aggregate digestion mechanism, and belongs to the technical field of CO2F waste water treatment. Background technique [0002] Microwave photocatalytic degradation treatment technology, as an effective harmless treatment technology for industrial wastewater containing organic pollutants, has attracted much attention 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 ...

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Problems solved by technology

[0036] In the device structure expressed in the Chinese patent application with the publication number CN102260003A, the outer wall of the quartz tube used to screen the electrodeless ultraviolet lamp refers to the outer wall of the quartz tube, which is treated with the treated industrial wastewater for a long time. Contact, it is inevitable to gradually accumulate fouling. Of course, the fouling substances are mainly inorganic impurities that are not easily touched by the photocatalytic reaction. The fouling phenomenon formed by this mechanism is easy to be observed after the equipment has been running for a long time; Although the fouling layer on the outer wall of the quartz tube is only a thin layer, it is enough to significantly block the ultraviolet radiation of the electrodeless ultraviolet lamp, which will cause the actual treatment efficiency of the microwave photocatalytic reaction treatment device to be greatly reduced; The rising air bubbles in the reactor are too scattered and the flushing force is weak. It is really difficult to maintain the surface of the quartz tube by relying on the relatively dispersed air bubbles. In other words, the more dispersed air bubbles are more The weak scouring force is not enough to completely stop the fouling process on the surface of the quartz tube; 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 eliminated. Therefore, how to immediately and effectively remove the fouling layer on the outer wall of the quartz tube without dismantling the machine, and maintain the continuous high efficiency of the microwave photocatalytic treatment device, this problem cannot be ignored. Question 10

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