Large handling capacity photocatalytic reactor for wastewater degradation by automatic stop at process ending

Abstract

The invention relates to a large handling capacity photocatalytic reactor for wastewater degradation by automatic stop at a process ending, and belongs to the technical field of wastewater treatment. Existing related background technologies have the problems of loss of nanometer photocatalyst, microwave energy dissipation, small wastewater handling capacity of single tank of the reactor, insufficient large circulating strength of inner liquid, difficult of distinguishing reaction ending, incapability of in-situ strong dissipation of catalyst conglobation and the like. The problems are solved by the scheme. In the scheme, a metal cage is used to constrain microwave, so as to greatly expand the reactor. According to the structure of the reactor, the large circulation of inner liquid is strengthened. An external cascaded three-level back-wash filter is beneficial for finely intercepting catalyst particles. The catalyst conglobation can be strongly dissipated in situ due to the structure, and meanwhile, an ultrasonic cleaning quartz tube is arranged. According to the structure, associated power supply can be automatically and immediately closed when the degradation reaction reaches the ending, so that energy injection is stopped, meanwhile, residual ozone generating process is terminated, and therefore, secondary pollution can be avoided.

Description

technical field [0001] The invention relates to a large-capacity photocatalytic reactor for waste water degradation that is automatically shut down at the end of a process, 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...

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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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