Photocatalytic wastewater degradation reactor expansion method for in-situ counteraction of catalytic agglomerates

Abstract

The invention relates to a photocatalytic wastewater degradation reactor expansion method for in-situ counteraction of catalytic agglomerates, and belongs to the technical field of wastewater treatment. In the existing related technologies, the problems that a catalyst interception link is weak, the utilization of microwave energy is not ideal, the single-tank wastewater treatment capacity of a reactor is small, the major cyclic strength of internal liquid is insufficient, the ending time of degradation reaction is difficult to discern, and catalytic agglomerates can not be subjected to in-situ forced counteraction, and the like exist, and the method is designed for solving the problems. The method disclosed by the invention comprises the following main steps: drawing in the microwave irradiation range by using a metal cage; bunching and raising a bubble flow by using a megaphone-shaped component; expanding the size of a reactor; intercepting nano photocatalyst particles level by level by using an external cascaded three-level backwash filter; carrying out in-situ forced counteraction on catalyst agglomerates by using ultrasonic waves emitted from the bottom of the reactor, and simultaneously, cleaning a quartz tube; and monitoring a reaction process by using an ozone sensor, and automatically controlling related power switch mechanisms by using sensing electric signals.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a photocatalytic wastewater degradation reactor for in-situ digestion of catalyst aggregates, 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 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 prote...

AI Technical Summary

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