Expansion method of photocatalytic wastewater degradation reactor with end-point automatic shutdown function

Abstract

The invention relates to a method for expanding a photochemical catalysis wastewater degradation reactor with an automatic endpoint shutdown function, and belongs to the technical field of wastewater treatment. The scheme is used for solving a series of problems of weak catalyst retaining link, unideal microwave energy utilization condition, small wastewater treatment capacity of a reactor single tank, insufficient large circulation strength of the internal liquid, difficult degradation endpoint time distinguishment, in-situ strong dispersing incapability of a catalyst agglomeration material and the like in the related prior art. The scheme mainly comprises the following steps of: utilizing a metal cage to narrow a microwave irradiation scope; adopting a trumpet-shaped member to bunch the rising bubble flow; expanding the size of the reactor; utilizing an external cascaded three-level flushing type filter to block the catalyst particles level by level; using ultrasonic waves from the bottom of the reactor to strongly disperse the catalyst agglomeration material in situ, and cleaning a quartz tube; and adopting an ozone sensor to monitor a reaction process, and utilizing sensing electric signals to automatically control a related power switch mechanism.

Description

Technical field [0001] The invention relates to a method for expanding the capacity of a photocatalytic wastewater degradation reactor with a terminal automatic shutdown function, 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 publication number CN102260003A uses microwave as the excitation source to excite the electrodeless ultraviolet lamp to emit ultraviolet rays, and irradiate the suspension liquid doped with photocatalyst titanium dioxide into the liquid. The electrodeless ultraviolet lamp is protected by a quartz tube. ...

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