In-situ digestion catalyst agglomeration method for expansion of ultraviolet photocatalytic wastewater degradation reactor

Abstract

The invention relates to an ultraviolet photocatalysis wastewater degradation reactor expanding method for dissipating catalyst agglomeration in situ and belongs to the technical field of wastewater treatment. The problems that the catalytic agent is eroded, the microwave energy is wasted, the single-tank wastewater treatment amount is small, the ozone is not completely used, the terminal point of degradation reaction is difficultly identified and a catalyst agglomeration cannot be powerfully dissipated in situ exist in the conventional related technologies. The method aims to solve the series of problems. The method comprises the following steps: constraining microwave so that microwave only irradiates a specific area; expanding the size of the reactor; improving the air supply strength aiming at the key degradation reaction area; gradually intercepting the nano catalyst by using an external cascade three-stage backwash filter; dissipating the catalyst agglomeration by using the ultrasonic in-situ power at the bottom of the reactor, and incidentally cleaning the quartz tube; sensing the reaction progress by using an ozone sensor, and driving the power control mechanism by using a sensing electric signal; and immediately closing the related power supply when the degradation end point is reached.

Description

technical field [0001] The invention relates to a method for expanding the capacity of an ultraviolet photocatalytic wastewater degradation reactor for in-situ digestion 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 shrou...

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