A Microwave Photochemical Catalytic Wastewater Degradation Reactor Capacity Expansion Method Against Catalyst Agglomeration

Abstract

The invention relates to a method for expanding the volume of a microwave photochemical catalysis wastewater degradation reactor capable of resisting catalyst agglomeration, belonging to the technical field of wastewater treatment. The existing related technology has the problems that the microwave energy is wasted, the single-pot wastewater treating capacity is small, the internal greater circulation strength is insufficient, the oxygen supply concentration degree of key areas is not enough, the interception link of catalyst particulates is weak, the end time of a degradation reaction is difficult to distinguish, catalyst agglomerates can not be strongly dissipated in situ, and the like, and the method aims to solve the problems. The method mainly comprises the following steps of: restricting a microwave irradiation airspace by using a metal cage to facilitate large-scale volume expansion of the reactor; releasing bubble flows to key degradation reaction areas in a concentrated mode; progressively intercepting the catalyst particulates by using an external cascaded three-grade backwash filter; strongly dissipating the catalyst agglomerates in situ by using ultrasound waves emitted from the bottom of the reactor, and cleaning a quartz tube at the same time; and sensing the degradation endpoint by using an ozone sensor, and driving a related power supply control mechanism by using sensing electric signals.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a microwave photochemically catalyzed wastewater degradation reactor that resists catalyst agglomeration, 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 shroud...

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