Microwave Synergistic Photocatalytic Wastewater Degradation Reactor to Avoid Secondary Pollution of Excess Ozone

Abstract

The invention relates to a microwave synergistic photocatalysis wastewater degradation reactor capable of avoiding the secondary pollution of surplus ozone, and belongs to the technical field of wastewater treatment. In the existing related technologies, the problems of weak catalyst intercept link, low reactor single-tank treatment amount, high repeated operation frequency, insufficient internal liquid circulation intensity, incomplete ozone utilization, difficulty in distinguishing of degradation reaction endpoint time, incapacity of powerfully dissipating catalyst aggregates in situ, and the like exist. The scheme aims at solving the series problems in one packet. In the structure of the scheme, microwave irradiation areas are separated and limited; via the structure, an ozone-containing bubble flow is guided to a focus degradation reaction area; fine intercept for catalyst particles is realized by an external cascaded multi-stage backwash filter; via the structure, the catalyst aggregates can be powerfully dissipated in situ, and a quartz tube can be ultrasonically cleaned simultaneously; and an ozone sensor and the related mechanisms thereof are installed at the tail gas emission port of the microwave synergistic photocatalysis wastewater degradation reactor, and the related power supplies can be immediately turned off when the degradation reaction arrives at the end point.

Description

technical field [0001] The invention relates to a microwave synergistic photocatalytic wastewater degradation reactor for avoiding secondary pollution of excess ozone, 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 and protected by a qua...

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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

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