Multifunctional solar photocatalytic waste water treatment apparatus used for pilot tests

Abstract

The invention discloses a multifunctional solar photocatalytic waste water treatment apparatus used for pilot tests. The apparatus comprises a measurement and control system and a water tank, a centrifugal pump and a reactor, which are sequentially connected to form a circulation loop; the reactor comprises reaction tubes and a daylighting panel composed of a plurality of composite paraboloid plates, and the axis of the reaction tubes is superposed with the focal line of the composite paraboloid plates; two ends of each reaction tube are provided with reaction tube joints, and adjacent reaction tube joints of two adjacent reaction tubes are hermetically connected; each reaction tube comprises an outer tube and an inner tube, which are coaxially arranged, an annular reaction area is formed between the inner tube and the outer tube, a low pressure mercury lamp is provided in the inner tube, and the low pressure mercury lamp and the centrifugal pump are respectively connected with the measurement and control system. According to the invention, photocatalysts with different load forms are employed for different photocatalytic reaction treatment of an organic waste water to be treated, and based on test results, an optimal photocatalytic treatment process for the waste water is preferably selected; therefore, the invention provides technical support and apparatus guarantee for popularization and application of large scale photocatalytic waste water treatment.

Description

technical field [0001] The invention belongs to the field of photocatalysis technology, and relates to a pilot test experiment research widely used in the treatment of various photocatalyst wastewater, which can be used under all-weather conditions, a solar photocatalytic wastewater treatment device suitable for various types of photocatalysts loaded, and specifically relates to A multifunctional solar photocatalytic wastewater treatment device for pilot test. Background technique [0002] Titanium dioxide (TiO 2 ) Photocatalytic oxidation technology was first discovered and applied to the decomposition of water in 1972, and the research on this technology has been widely carried out. In 1976, carey et al. first reported that TiO 2 It can effectively degrade the biodegradable organic compound polychlorinated biphenyls; later, as a new water treatment technology, solar photocatalytic oxidation method is green, low energy consumption, complete degradation, non-selective to d...

AI Technical Summary

Problems solved by technology

The currently used reactors are suspension catalyst reactors, film-coated catalyst reactors and packed bed photocatalytic reactors; the advantage of suspension photocatalyst reactors is that the photocatalyst can fully contact with pollutants, and there is no limitation of mass transfer , but when the concentration of the catalyst is increased, the suspension will be turbid, which will affect the penetration of light and reduce the light efficiency, and it is difficult to separate the catalyst from the liquid, and the processing cost is high

The film-coated catalyst reactor degrades and mineralizes the pollutants adsorbed on the surface of the catalyst film under the irradiation of light. It does not need to separate the catalyst, but the reaction is easily limited by mass transfer.

The packed bed photocatalytic reactor does not need to separate the catalyst, and the mass transfer effect is good, but the collision between the supported catalyst particles will cause the catalyst to fall off

The above three reactors have their own technical advantages, but at the same time there are deficiencies. It is unscientific to determine which photocatalyst reactor is used to treat organic wastewater only by analyzing the characteristics of the three reactors.

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