Novel acousto-optic catalytic water purification device and working method thereof

Abstract

The invention provides a novel acousto-optic catalytic water purification device and a working method thereof. The novel acousto-optic catalytic water purification device is characterized in that an ultrasonic source, a light source, an acousto-optic catalyst adding port and an acousto-optic catalyst intercepting and recycling channel are arranged in the device; and a reaction tank is connected with a water inlet channel, a water outlet channel and a blow-off pipe. A main body part of the device is composed of an acousto-optic catalytic reactor and a secondary cross-flow filtration reaction membrane; (1) the acousto-optic catalytic reactor achieves the purpose of acousto-optic catalytic degradation of pollutants; (2) ultrasonic transducers of the adopted ultrasonic field are divided into two groups, the adopted ultrasonic field is a double-frequency ultrasonic field, the purpose of adopting double frequencies is to enable sound waves to generate the superposition phenomenon, vibrationwaves with larger amplitude are generated in the sound wave diffusion process, and the increase of the number and types of cavitation bubbles is promoted; and (3) the concentration polarization of themembrane filtration material is reduced through cross-flow filtration, the membrane operation time is prolonged, and meanwhile, the catalyst is retained in the reactor through membrane filtration, sothat the loss of the catalyst is avoided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a novel acousto-photocatalytic water purification device and a working method thereof, and is especially suitable for the degradation field of refractory organic wastewater such as printing and dyeing wastewater, medical wastewater, and papermaking wastewater. Background technique [0002] At present, due to the advantages of high oxidation activity, non-toxicity, and high economic benefits, photocatalytic technology has received more and more attention in the field of wastewater treatment. However, the traditional photocatalytic oxidation technology is often limited by the type and intensity of light. When it is applied to non-transparent water bodies, the penetration depth of the light source is only a few millimeters, which greatly reduces the utilization rate of the light source. These defects are to a certain extent This limits the application of photocat...

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Problems solved by technology

In the supporting system, the catalyst is loaded on a certain carrier, such as thin film type, filled type, etc., which has the advantage of effectively solving the problem of catalyst loss and agglomeration, and does not affect the depth of light radiation, but part of the active sites are covered, resulting in catalyst The number, surface area, and interlayer gap decrease, which reduces the catalytic reaction efficiency. The suspension system can overcome these shortcomings. The system uses nano or micron catalyst particles dispersed in the liquid to have sufficient contact with pollutants. Higher, the mass transfer resistance of the reaction is small, so the reaction efficiency is high, but the solution in the liquid is agglomerated, and it is not easy to separate from the liquid

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