Capacity expansion method of microwave photocatalytic wastewater degradation device with automatic monitoring and warning end point

Abstract

The invention relates to a capacity expansion method for a microwave photocatalytic wastewater degradation device capable of automatically monitoring and warning a terminal, and belongs to the technical field of wastewater treatment. The problems of loss of a nanometer catalyst, small wastewater treatment quantity of a single tank of a reactor, high frequency of repeated operation, difficulty in distinguishing a terminal moment of degradation reaction and incapability of in situ forced dissipation of catalyst clusters exist in the prior art, and the invention aims at solving the series of problems in the prior art completely. The capacity expansion method comprises the main steps of: separating a microwave irradiation airspace; significantly extending and expanding the size of the reactor; bunching and guiding bubble flow to release the bubble flow towards a key degradation reaction area in a concentrated way; intercepting particles of a nano photocatalyst stage by stage by using an external cascade three-stage reverse-washing filter; carrying out in situ forced dissipation on the catalyst clusters by using ultrasonic waves released from the bottom of the reactor, and simultaneously cleaning a quartz tube incidentally; and sensing a degradation terminal by using an ozone sensor, and driving a power control mechanism to automatically turn off a related power supply when being positioned at the terminal.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a microwave photocatalytic wastewater degradation device for automatic monitoring and warning of an 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 s...

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