Large-scale photocatalytic wastewater degradation reactor getting rid of trouble of catalyst agglomeration

Abstract

The invention relates to a large-scale photocatalytic wastewater degradation reactor getting rid of trouble of catalyst agglomeration, and belongs to the technical field of wastewater treatment. A conventional related technology has the problems that the catalyst is lost, microwave energy is wasted, volume of a single tank is small, internal liquid circulation intensity is not enough, utilization of ozone is incomplete, an endpoint of a degradation reaction is difficult to distinguish, aggregation materials of the catalyst can not be dissipated in-situ, and the like. Aiming at the above problems, the large-scale photocatalytic wastewater degradation reactor getting rid of the trouble of the catalyst agglomeration is provided. A structure of the large-scale photocatalytic wastewater degradation reactor getting rid of the trouble of the catalyst agglomeration restricts microwave irradiation airspace, guides ozone air bubble stream to release toward a key reaction area, achieves step-by-step interception of catalyst particles by an external cascaded three-stage backflushing filter, can dissipate the aggregation materials of the catalyst in situ and clean a quartz tube incidentally, and can automatically close relevant power supplies in time when the degradation reaction reaches the endpoint, so that the energy waste can be prevented, and surplus and pollution release of the ozone can be completely eliminated.

Description

technical field [0001] The invention relates to a large-capacity photocatalytic wastewater degradation reactor that eliminates the problem of 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 shrouded and protected by a quart...

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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

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