Enhanced-type capillary-needle discharging plasma water treatment device

Abstract

The invention relates to an enhanced-type capillary-needle discharging plasma water treatment device, which belongs to the technical field of the application of low-temperature plasma, and relates to a constant-pressure plasma discharging reaction device for water treatment, and the enhanced-type capillary-needle discharging plasma water treatment device is characterized by comprising a reaction container and a discharging device, wherein the discharging device consists of a metal capillary power electrode, an insulation medium pipe, a metal end cover suspension electrode and an air chamber and is arranged inside the reaction container; working gas enters the metal capillary and the insulation medium pipe through the air chamber, gas discharging plasma is generated inside the insulation medium pipe between a needle-shaped pipe orifice on the lower end of the metal capillary and a metal end cap under the effect of high-voltage power supply, a generated product enters solution to be treated through small holes on the metal end cap, and solution inside the reaction container is purified; and the enhanced-type capillary-needle discharging plasma water treatment device has advantages that the utilization rate of active substances is high, the universality for different solutions to be treated is strong, the stability is good, easiness in integration is realized, and the exciting source requirement of the plasma is reduced.

Description

technical field [0001] The invention belongs to the application technical field of low-temperature plasma, and relates to an atmospheric pressure plasma discharge reaction device which can be used for water treatment. Background technique [0002] As a basic need for human survival, water resources must be highly valued and effectively protected because of its scarcity and irreplaceable status in production and life. With the acceleration of industrialization and urbanization in China, the consumption of fresh water is increasing day by day. At the same time, the discharge of industrial sewage and domestic sewage is also increasing year by year, resulting in more urgent demand for water resources. Due to the complex composition and variety of pollutants in sewage, especially industrial wastewater, some organic substances are difficult to effectively degrade when treated by conventional methods. Even if some can be degraded, there will be problems such as incomplete degradati...

AI Technical Summary

Problems solved by technology

Among them, the needle of the syringe is used as the power electrode. In the application process, an expensive inert gas (such as argon or helium) must be used as the working gas. Under the excitation of the power source, a large amount of plasma is generated in the dielectric tube, which is passed through the air flow and electric field. , the plasma in the discharge area is ejected out of the tube to form a jet, which is observed as a conical light column with the naked eye. It is mainly used for decontamination of the material surface (including the surface of organisms) and cleaning of the inner wall of the dielectric tube; under certain conditions, it can also be used in a liquid atmosphere. However, the aqueous solution easily invades the inside of the glass tube and interferes with the discharge stability. In addition, the discharge intensity still needs to be further improved.

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