Method for expanding photochemical catalysis wastewater degradation reactor for avoiding residual ozone diffusion

A wastewater degradation and reactor technology, which is applied in oxidation water/sewage treatment, illumination water/sewage treatment, etc., can solve the problems of ultraviolet radiation blocking, weak scour force, and reduced treatment efficiency of microwave photocatalytic reaction treatment devices, etc. Achieve the effect of greatly expanding the design capacity, avoiding secondary pollution, and maintaining the performance of ultraviolet light transmission

Inactive Publication Date: 2013-07-17
NINGBO UNIV
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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

Method used

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Embodiment Construction

[0085] The implementation of the method in this case, its main steps are as follows:

[0086] a, a metal trumpet-shaped component is suspended vertically in the inner cavity of the reactor with the big head facing down;

[0087] b. Vertically suspending the quartz tube with the electrodeless ultraviolet lamp installed in the upper airspace inside the cavity of the trumpet-shaped member;

[0088] c. The structural position above the quartz tube and the structural position below the quartz tube in the cavity of the horn-shaped component are separated by metal mesh, and a total of two pieces of metal mesh are involved, which are the upper piece of metal net and the lower piece of metal mesh, wherein the upper piece of metal mesh is adjacent to the upper port of the trumpet-shaped member or is flat with the upper port, and the upper and lower pieces of metal mesh are cut in the cavity of the horn-shaped member, Outline a section of cylindrical airspace containing the quartz tube ...

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Abstract

The invention relates to a method for expanding a photochemical catalysis wastewater degradation reactor for avoiding residual ozone diffusion, and belongs to the technical field of wastewater treatment. The scheme is used for solving a series of problems of weak catalyst retaining link, small wastewater treatment capacity of a reactor single tank, repeated operation frequency, insufficient circulation strength of the internal liquid, incomplete ozone utilization, difficult degradation endpoint time distinguishment, in-situ strong dispersing incapability of a catalyst agglomeration material and the like in the related prior art. The method mainly comprises the following steps of: limiting a microwave irradiation scope; bunching the rising bubble flow and guiding the bubble flow to an important degradation reaction area; utilizing an external cascaded three-level flushing type filter to block the catalyst particles level by level; using ultrasonic waves from the bottom of the reactor to strongly disperse the catalyst agglomeration material in situ, and cleaning a quartz tube; and adopting an ozone sensor to monitor a reaction process, and utilizing sensing electric signals to automatically control a power switch mechanism so as to immediately turn off a power supply at a degradation endpoint time.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a microwave photocatalytic wastewater degradation reactor that prevents excess ozone from escaping, 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/32C02F1/78
Inventor 李榕生李天华孔祖萍葛从辛孙杰干宁王冬杰任元龙
Owner NINGBO UNIV
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