A device and method for generating discharge plasma in water using a direct current source

Abstract

The invention relates to a device and method for generating discharge plasma in water by using a direct current source, and a method for treating industrial wastewater by using the plasma generated by the device. The device drives a rotating electrode to perform circular motion through a drive shaft, and the rotating electrode moves Repeat the separation-contact-separation process with at least two movable electrodes during the process, and generate plasma that can be used to degrade organic matter in the solution and kill harmful microorganisms during the process. Using this device to generate plasma does not require a complex high-voltage pulse power supply, the power supply structure is simple, and it is easy for industrial application; and because the rotating electrode and the movable electrode at the discharge end in the device only generate arc plasma in a short period of time in a movement cycle, It can effectively reduce the degree of electrode ablation; the device has a large discharge power, and can generate a large number of active particles and high-intensity ultraviolet rays in the treated solution per unit time, which can better achieve the purpose of aqueous solution treatment.

Description

technical field [0001] The invention relates to the technical field of discharge plasma in water, in particular to a device and method for generating discharge plasma in water by using a direct current source. Background technique [0002] While the rapid development of modern industry has enriched material life, it has also inevitably brought about aggravated environmental pollution. Therefore, how to degrade this type of industrial wastewater economically and effectively has become the focus of contemporary environmental scientists, and a large number of researchers are working on developing a cost-effective treatment technology. [0003] Pulse discharge plasma water treatment technology is widely researched technology, because it is a kind of plasma application technology covering a variety of advanced oxidation technology (such as electron radiation, ozone oxidation, hydrogen peroxide oxidation, photochemical oxidation, super Critical water oxidation, etc.) new water tr...

AI Technical Summary

Problems solved by technology

In the research on pulse discharge plasma water treatment technology, researchers found key problems restricting the practical application of this technology: First, due to the small energy released by a single pulse discharge and the limited ability to treat solution pollutants, this technology has been applied to The treatment time in the water treatment process is long, which is difficult to apply in practice; secondly, in the process of high-voltage pulse discharge plasma water treatment, the electrode discharge is severely ablated after the pulse arc discharge occurs, which affects the discharge effect, and the electrode must be replaced frequently; finally, the pulse discharge Discharge plasma water treatment technology uses high-voltage pulse power supply, and the equipment cost is high

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