Solar photocatalytic oxidation-membrane separation three-phase fluidized bed internal circulation reaction device

Abstract

The invention discloses an internal circulation reaction device for a sunshine catalytic oxidation and membrane separation three-phase fluidized bed. The internal circulation reaction device comprises a light-catalyzed reaction region and a membrane separator 2, wherein the light-catalyzed reaction region consists of a light collection plate (a truncation type composite paraboloid light collection plate or a sunshine energy gathering plate), a solar tracking device, tubular reactors, a lower water tank and a first aeration device, the membrane separator 2 consists of a membrane separator shell and a membrane component, a second aeration device is arranged at the bottom of the membrane component according to a requirement; the solar tracking device cannot be included according to the requirement; the membrane separator shell can be open or closed and provided with an air exhaust device; the lower water tank and the membrane separator shell can be provided with heating devices according to demands. Wastewater in the device can flow in an internal circulation manner among the tubular reactors. The internal circulation reaction device for the sunshine catalytic oxidation and membrane separation three-phase fluidized bed can execute light-catalytic oxidation reaction and also can execute light-heat synergistic catalytic oxidation reaction.

Description

technical field [0001] The present invention relates to a kind of reaction device, and the present invention particularly relates to a kind of solar photocatalytic oxidation wastewater treatment device not affected by weather: solar photocatalytic oxidation-membrane separation three-phase fluidized bed internal circulation reaction device (the following internal circulation reaction device ), the device can be applied not only to the pretreatment or advanced treatment of toxic and harmful refractory organic wastewater, but also to the advanced treatment of slightly polluted drinking water. Background technique [0002] With the rapid development of my country's social economy, a large amount of waste pollutants are inevitably produced, which leads to serious environmental pollution and ecological damage. Traditional treatment methods cannot completely eliminate degradation pollutants, and are likely to cause secondary pollution, with narrow application range and high energy ...

AI Technical Summary

Problems solved by technology

The disadvantages are: ① only direct UV radiation can be used, and the treatment effect is significantly reduced in cloudy or cloudy days

②PTC's solar tracking system has a complex structure, the reactor requires special materials, and the cost is high, making it difficult to promote

But the disadvantages of this reactor are obvious: ①The molar flow rate is slow, and the high removal rate is based on the low hydraulic load

② There is a mass transfer limitation. It is found that the increase of the thickness of the liquid film in the reactor will hinder the diffusion of the solution components, and the thickness of the liquid film must be controlled within 100-200 μm

[0013] For suspension catalysts, it is not suitable for large-scale and commercial applications because of the separation and recovery problems after the reaction. In view of the particle size of commonly used TiO2 powders in the range of 10-100nm, some researchers combined photocatalytic oxidation with membranes. Technology coupling is used to solve the shortcomings of the suspended photocatalytic reaction device. After the particle catalyst is separated by the membrane separation device, it can be separated, recycled and reused under the action of circulating water.

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