Water treatment device through combination of atmospheric pressure plasma jet, ultrasonic wave and catalysis

Abstract

The invention discloses a water treatment device through combination of atmospheric pressure plasma jet, ultrasonic wave and catalysis. The water treatment device comprises a gas-liquid two-phase reaction unit, an ultrasonic radiation unit, a gas flow adjusting unit, a liquid flow adjusting unit, a gas-liquid separation unit, an optical detection unit, a water quality analysis unit, and a drivingunit; and a photocatalysis unit is arranged in the gas-liquid two-phase reaction unit. An active substance of plasma generated in a gas phase by the atmospheric pressure plasma jet (APPJ) is injectedto a water treatment reactor for degrading pollutant molecules in liquid phase organic waste water, the atmospheric pressure plasma jet, ultrasonic effect of the ultrasonic radiation unit and the photocatalysis of the photocatalysis unit generate cooperative effect, the active substance for enhancing gas phase discharge can process the organic waste water, and the waste water processing efficiencyis effectively increased.

Description

technical field [0001] The invention relates to a water treatment device in which atmospheric pressure plasma jet cooperates with ultrasound and catalysis, and belongs to the technical field of water treatment. Background technique [0002] The pollution of water resources in my country and the world is becoming more and more serious. It is very important to adopt certain water treatment methods for wastewater. Traditional water treatment methods mainly include physical methods such as filtration and adsorption, and biochemical methods such as anaerobic biochemical treatment and aerobic biological treatment. , these traditional methods can no longer meet the requirements. [0003] In recent years, advanced oxidation technology has become a hot spot in the treatment of organic wastewater. Compared with low-pressure plasma, atmospheric pressure plasma has the advantages of simple operation, low consumption, no need for vacuum devices, and easy realization of assembly line pro...

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Problems solved by technology

However, the efficiency of the current atmospheric pressure plasma treatment of wastewater is generally low. The main measures to improve the treatment efficiency are as follows: First, use other advanced oxidation technologies such as ultrasonic technology to cooperate with plasma water treatment, such as the patent ZL201410337343.7 "plasma cooperative ultrasonic Cavitation Effect Wastewater Treatment Reactor", but this patent fails to make full use of the ultraviolet rays generated by the plasma, resulting in a waste of energy; the second is to use physical methods such as spraying, aeration, and mechanical disturbance to increase the contact area between the plasma and the wastewater. For example, the patent 201610541119.9 "a plasma treatment device for landfill leachate", but the wastewater treatment capacity of this patent is small, and the ultraviolet rays generated by the plasma cannot be fully utilized; the third is to use an array discharge structure to generate more activity Substances act on wastewater, such as patent 201610183437.2 "An array type high-density water dielectric barrier discharge wastewater treatment device", but this patent will cause a decrease in treatment efficiency due to recycling in the same container

Therefore, there are still two major problems at present: (1) the ultraviolet rays generated by the plasma cannot be fully utilized; (2) the relationship between the area in contact with the plasma and the wastewater and the treatment flow is difficult to coordinate, and the treatment flow is often insufficient when the contact area is large

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