Gas-phase high pressure pulse discharge device and method for catalytically degrading organic dyes in water by same

Abstract

The invention discloses a gas-phase high pressure pulse discharge device and a method for catalytically degrading organic dyes in water by the same. A reaction device comprises a tubular rector and a gas inlet pipe at the bottom thereof, a liquid storage tank and a gas outlet on the top thereof, a high pressure electrode and a ground electrode which are respectively hung on the upper part and thelower part of the reactor through fixed guide rods, and an external high pressure pulse power supply. Nonequilibrium plasmas generated through gas-phase high pressure pulse discharge degrade the organic dyes; and the design structure inside the reactor makes gas and liquid flowing directions fixed, can make contact time of the generated oxidative particles and pollutants prolonged, and improves the conversion efficiency of the reactor. Meanwhile, an adsorptive catalyst is put into the upper part of the reactor or into the liquid storage tank to improve the concentration of organic matters at the liquid level, so that the contact between high-activity substances and the organic matters is enhanced and the treatment efficiency can be improved. By the invention, the organic pollutants are degraded into carbon dioxide, water and nontoxic byproducts, and the invention has the advantages of high efficiency, low cost, simple process, simple operation, no secondary pollution on environment and the like.

Description

technical field [0001] The invention belongs to the non-equilibrium plasma technology in the field of environmental pollution control and a method for jointly degrading organic dyes by non-equilibrium plasma and an adsorption catalyst, in particular to a gas-phase high-voltage pulse discharge device and a method for catalytically degrading organic dyes in water. Background technique [0002] Environmental protection and water resources management have attracted great attention from the Chinese government. Revolving around the important subject of environmental protection and water treatment, relevant institutions have carried out a lot of research and application. my country is a big printing and dyeing industry country, printing and dyeing wastewater is intermittently discharged, the water quality and quantity vary widely, and the amount of wastewater discharged every year is huge. Although traditional physical methods and chemical methods have been applied in the treatment...

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Problems solved by technology

When these active substances flow to the gas-liquid interface, these substances can react with organic molecules, or penetrate into the liquid phase through the interface to react with the substances in the liquid phase, but the active substances in the gas phase diffuse into the liquid phase at a high speed. Limits the efficiency of gas phase discharge to a certain extent

For the gas-liquid two-phase discharge, although the efficiency idea is improved for the above two discharge forms, the relative discharge intensity of the two phases cannot be adjusted.

When the high voltage is applied, the discharge form of the gas phase is corona discharge, and substances such as ozone can be generated near the electrodes, but because the gas outflow in the liquid phase directly takes the active substances generated in the gas phase out of the reactor, it is not fully integrated with the gas phase. The liquid phase is in contact, so the treatment effect of the gas phase has not been fully explored

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