Volume expansion method capable of warning terminal point for microwave photochemical catalytic wastewater degradation reactor

Abstract

The invention relates to a volume expansion method capable of warning a terminal point for a microwave photochemical catalytic wastewater degradation reactor, belonging to the technical field of wastewater treatment. In the existing relevant technologies, the problems of waste of microwave energy, smaller single-tank wastewater treatment capacity, insufficient internal large circulation intensity, insufficient oxygen supply centralization degree in key regions, weaker catalyst micro-particle interception link, difficulty in distinguishing the time of the terminal point of degradation reaction, incapability of performing in-situ strong dissipation on catalyst agglomerates and the like exist, and the scheme is designed against the series of the problems. The method adopting the scheme mainly comprises the following steps: using microwaves restricted by a metal cage to irradiate an airspace to facilitate the great volume expansion of the reactor; releasing a bubble stream to a key degradation reaction region in a centralized manner; gradually intercepting catalyst micro-particles by using an external cascaded three-stage backwashing type filter; using ultrasonic waves emitted from the bottom of the reactor to perform the in-situ strong dissipation on the catalyst agglomerates and simultaneously carrying a clean quartz tube; and using an ozone sensor to sense the terminal point of degradation and using a sensed electrical signal to drive a related power supply control mechanism.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a microwave photochemical catalysis wastewater degradation reactor capable of warning the end point, 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 an...

AI Technical Summary

Problems solved by technology

[0038] 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