A photocatalytic reactor

Abstract

The invention discloses a photocatalytic reactor, comprising: 1) a water tank, which is an accommodating tank with an upper opening; To provide a light source to the water to be treated in the water tank; 3) a rotating mechanism, which is arranged in the water tank, and the rotating mechanism includes a rotating shaft, a cylinder fixed on the rotating shaft, and the setting direction is the same as that of the rotating shaft. A number of blades uniformly distributed on the outer surface of the cylinder side wall, the cylinder and the rotating shaft are arranged horizontally; 4) a power mechanism, which is connected with the rotating shaft, drives the rotating shaft to drive the cylinder to rotate ; Wherein, the water to be treated in the water tank is dispersed with floating or suspended particle materials for photocatalytic reaction. The photocatalytic reactor provided in this case integrates the advantages of the suspension reactor and the loaded reactor, and has the advantages of high mass transfer efficiency, high light utilization rate, easy separation and recovery of the catalyst, and strong adaptability.

Description

technical field [0001] The present invention relates to a water processor, more specifically, the present invention relates to a photocatalytic reactor. Background technique [0002] As a new type of pollution removal technology, photocatalytic oxidation is considered to be one of the most promising environmental pollution removal technologies because of its non-selectivity to the degradation of pollutants in water and the potential of utilizing sunlight. At present, the research on photocatalytic oxidation technology mainly focuses on the research of photocatalysts. There are very few photocatalytic reactors for water treatment, especially those that can be put into practical production applications. Difficulty in separation and recycling. According to the form of the catalyst, photocatalytic reactors can be divided into two categories, namely suspension photocatalytic reactors and supported photocatalytic reactors. Suspension-type photocatalytic reactors generally use mi...

AI Technical Summary

Problems solved by technology

Suspension-type photocatalytic reactors generally use micron or nanometer catalyst particles, which have a large specific surface area and many active sites for photocatalysis, so they have high photocatalytic efficiency; the light source is usually set in a suspension containing catalyst and water to be treated. In the turbid liquid, the light penetration is poor and the attenuation is fast, resulting in a low utilization rate of light; the suspended powder catalyst is difficult to separate and recover

The supported photocatalytic reactor mainly solves the problem of catalyst separation and recovery, but because a part of the active sites of the photocatalyst is used to combine with the carrier, the number of active sites available for the supported photocatalyst is greatly reduced, resulting in a decrease in catalytic activity and pollution. The mass transfer efficiency of matter to the catalyst surface slows down, and the light utilization rate decreases

[0003] Chinese patent (CN201770511U) discloses a form of a rotating disk photolysis reactor, the photocatalyst is loaded on the rotating disk, which solves the problem of poor penetration of ultraviolet light in the suspension reactor, but the catalytic activity of the loaded catalyst is low , and the amount of catalyst that can be loaded on a single turntable is very limited, and in order to facilitate the irradiation of ultraviolet light, the distance between the turntables should not be too small, which leads to the limited processing capacity of the turntable photolysis reactor

Chinese patent (CN1587085A) discloses a rotary drum photocatalytic reactor, the inner wall of the drum is coated with a thin layer of titanium dioxide or a suspended titanium dioxide water film is hung on the outer wall of the drum, and ultraviolet light is irradiated from both sides or directly above. The excellent distribution of catalyst and treated wastewater can be achieved by adjusting the rotation speed of the drum, but when the inner wall of the drum is coated with a thin layer of titanium dioxide, and the ultraviolet light is irradiated from one or both sides of the drum, the utilization rate of ultraviolet light is still limited by this form. low; and when the suspended titanium dioxide water film is used to hang on the outer wall of the drum, there is still the problem of separation and recovery of the catalyst from the treated water

Chinese patent (CN103387272A) discloses a device and method for photocatalytically degrading phenol-containing wastewater. Titanium dioxide is evenly loaded on the turntable and the inner wall of the reactor by using an adhesive, and ultraviolet lamps are arranged on the upper and lower sides of the turntable. Water forms a water film on the surface of the turntable and the inner wall of the reactor from top to bottom to increase the contact opportunities of the catalyst, treated water, and light, enhance the mass transfer effect, and improve the utilization rate of light energy, although this method is better than the turntable photolysis The catalyst load of the reactor is large, but for a specific reactor, the amount of catalyst loaded is still a fixed value, and the reactor has poor adaptability to different water quality and shock load resistance

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