Large-area dielectric barrier discharge synergistic ultrasound and catalysis water treatment device

Abstract

The invention discloses a large-area dielectric barrier discharge synergistic ultrasound and catalysis water treatment device. The large-area dielectric barrier discharge synergistic ultrasound and catalysis water treatment device comprises a gas-liquid two-phase reaction unit, an ultrasound irradiation unit, a gas flow regulating unit, a liquid flow regulating unit, a gas-liquid separation unit,a water quality analysis unit and a drive unit, the gas-liquid two-phase reaction unit is internally provided with a photocatalysis unit, and communicated array type DBD (Dielectric Barrier Discharge)reactors are arranged above the gas-liquid two-phase reaction unit. An active substance of plasma is produced in a gas phase through dielectric barrier discharge and is injected into the water treatment device to degrade an organic pollutant molecule in the wastewater of a liquid phase, the active substance achieves a synergistic effect together with the ultrasound irradiation unit and the photocatalysis of the photocatalysis unit, and the active substance produced through the gas phase discharge is strengthened to treat the organic wastewater. The array type dielectric barrier discharge structure greatly increases the discharge area and increases the yield of the active substance of the plasma, and the water treatment efficiency is greatly improved through cascaded processing.

Description

technical field [0001] The invention relates to a large-area dielectric barrier discharge cooperative ultrasonic and catalysis water treatment device, which belongs to the technical field of water treatment equipment. 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 low-temperature plasma has the advantages of simple operation, low consumption, no need for vacuum devices, and easy realizati...

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Problems solved by technology

However, the efficiency of the current atmospheric pressure low-temperature plasma treatment of wastewater is generally low, and the main measures to improve the treatment efficiency are as follows: First, use other advanced oxidation technologies such as ultrasonic technology and other synergistic plasma water treatment, such as the patent ZL201410337343.7 "plasma synergistic 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 wastewater , such as patent 201610541119.9 "a landfill leachate plasma treatment device", but the waste water 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 Active 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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