Liquid electrode surface discharge plasma reactor for water treatment

Abstract

The invention relates to a liquid electrode surface discharge plasma reactor which is used for water treatment and consists of a flume, a discharge electrode system and a wastewater region, wherein, the discharge electrode system is positioned at the center of the flume, wastewater exists around the insulating medium tube of the discharge electrode system, the discharge electrode system is connected with the high pressure terminal of an alternating current high voltage source, the wastewater is taken as the liquid electrode which is connected with the low pressure terminal of the alternating current high voltage source, or the liquid electrode and the low pressure terminal of the alternating current high voltage source are simultaneously connected with ground wires, and aeration gas enters from the upper end of the insulating medium tube of the discharge electrode system, is ejected out from an aeration head at the lower end and then flows into the wastewater. When electricity is supplied by power, surface discharge plasma is produced on the inner wall of the medium tube, active materials are generated when the aeration gas passes through, and the active materials degrade pollutants in water and then treat the water. The liquid electrode surface discharge plasma reactor has the advantages of simple structure, high water treatment effect, low initial investment and small operation cost.

Description

technical field [0001] The invention relates to a discharge plasma reactor for water treatment, in particular to a liquid electrode surface discharge plasma reactor for water treatment. Background technique [0002] Discharge plasma under atmospheric pressure can produce some substances with strong oxidation activity, such as hydroxyl radical OH, ozone O 3 And atomic oxygen O, etc., can effectively treat traditional methods such as biochemical methods, chemical methods and physical methods for refractory wastewater, especially toxic organic wastewater, printing and dyeing wastewater and bacteria and algae. At present, there are three main forms of discharge plasma water treatment reactors, namely pure liquid phase discharge plasma, gas-liquid two-phase mixed discharge plasma and gas phase discharge plasma reactor above the water surface. A discharge plasma reactor with a mixture of liquid and gas-liquid two-phase, since the water to be treated exists between the electrodes,...

AI Technical Summary

Problems solved by technology

A discharge plasma reactor with a mixture of liquid and gas-liquid two-phase, since the water to be treated exists between the electrodes, the conductivity of the water has a great influence on the state of the discharge plasma and the generation of active substances, especially for high conductivity The treatment effect of the water body with good conductivity is poor, and, because the discharge electrode is in the water, the electrode corrosion problem affects the discharge plasma operating state and treatment effect, and also affects the operating life of the reactor

The discharge plasma reactor above the water surface, although the discharge occurs in the gas phase environment, is less affected by the conductivity of the water body, but the diffusion efficiency of the active substances generated by the discharge plasma into the treated water body and the thickness of the water body are limited, affecting the water quality. Processing effect

Although the dielectric barrier discharge plasma reactor in water can overcome the influence of water conductivity, there are still some shortcomings in the generation of dielectric barrier discharge plasma in water, the generation of active substances and the efficiency of water treatment.

Since the successful development of the ozone generator, it has been maturely applied in the field of water treatment. However, because the ozone generation reaction process is an exothermic reaction, the temperature of the ozone generator increases during the working process, which reduces the amount of ozone produced. Therefore, the ozone generator A cooling system must be designed to control the temperature, resulting in increased equipment and operating costs for the ozone generator

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