Efficient photocatalytic water-treating process and apparatus

Abstract

The present invention relates to one kind of efficient photcatalytic water-treating process and apparatus. Inside a ceramic or stoneware tube with TiO2 coated to the inner wall, a transparent tube is set coaxially and an ultraviolet light source is set inside the double tube to constitute a membrane reaction tube. The membrane reaction tube is mounted vertically, the water to be treated inflows from the lower end of the membrane reaction tube and the treated water outflows from the upper end of the membrane reaction tube. The water flow rate is controlled so that the water settling time or photcatalytic reaction time is controlled. The apparatus is suitable for degrading organic matter and sterilizing of slightly contaminated industrial waste water, domestic waste water and natural water. The apparatus has jetting device to ventilate the solution, reflux device to reinforce the mass transfer effect of the reaction system, and control system including power source and light source controller.

Description

1. Technical field [0001] The invention relates to a method and equipment for high-efficiency photocatalytic water treatment. 2. Background technology [0002] Due to powdered TiO 2 Catalysts are difficult to recycle, hindering the application of photocatalytic technology in wastewater treatment. With TiO 2 In-depth research on photocatalyst loading technology, fixed TiO 2 It is increasingly used in the development of photocatalytic reactors. It has been reported to support TiO 2 The most common carriers are metal, glass and ceramics, etc., but some catalysts are easy to fall off, and the activity is difficult to recover after being polluted in practical applications. Most of the reported reactors are laboratory-scale, with small processing capacity, and some reactors have complex designs, which are difficult to apply in practice. [0003] CN01130821.4 A photocatalytic reactor for water treatment, with a vertically arranged pressure water inlet pipe as the axis, and mu...

AI Technical Summary

Problems solved by technology

[0009] The above disc structure reactor, using optical fiber to load TiO 2 The design of the photocatalytic reactor, catalyst particle fluidized reactor, drum reactor and three-phase three-dimensional electrode photocatalytic reactor needs to be further simplified to reduce equipment cost and operating cost to adapt to the actual wastewater treatment of large flow ; The effective illumination area of ​​the catalyst in some reactors can be further increased to enhance the photocatalytic degradation effect; loaded TiO 2 The mechanical strength and corrosion resistance of the catalyst carrier need to be further improved to improve the versatility to various water bodies; CN01265866.9 "a tubular photocatalytic reactor" can only achieve a large flow when processing gas, but it is used for The flow will be limited during wastewater treatment

Images