Large liquid phase high pressure pulse discharging water processor

Abstract

The invention belongs to the water processing technical field, which discloses a large liquid phase high pressure pulse discharging plasma water processor. The invention is characterized by a coaxial electrode structure which is formed by a metal rod the diameter of which is more than 2 mm and a metal cylinder. A metal rod electrode is sleeved with an insulating pipe with a minute gap the width of which is 20 to 100 microns. The diameter of the metal cylinder is more than 45mm, which is sleeved with a insulating pipe externally and grounded through a resistance. Water to be processed is sent to the electrode structure through an inflow pump and a water level inductor senses water level and controls inflow quantity. The pulse high voltage of more than 20kv is added to the central metal rod electrode. The insulating pipe minute gap on the central metal rod electrode generates local high electric field and causes discharge, consequently the discharging plasma is generated in the water to be processed in the cylinder. According to the actual requirement, a plurality of electrodes can be connected in series. The processing of the central electrode has the advantages of simple manufacture, convenient replacement and the ability of reuse. The invention has strong processing capability and can reduce the power supply device cost greatly.

Description

technical field [0001] The invention belongs to the water treatment technology in the fields of low-temperature plasma engineering and environmental chemical engineering, and relates to a large-volume liquid-phase high-voltage pulse discharge plasma water processor, which can be used for sterilization of drinking water and beverages, industrial wastewater treatment, and lakes and ponds Water treatment such as cyanobacteria removal. Background technique [0002] High-voltage pulse discharge in water produces complex physical and chemical processes. Physical processes include: the formation of gas bubbles, the formation of localized regions of high temperature and pressure, the formation of shock and sound waves, and ultraviolet radiation. The chemical process mainly includes OH free radicals, H 2 o 2 , O 2 , O 3 、H 2 Formation in chemical activity. These complex physical and chemical processes make the high-voltage pulse discharge in water have unique technical advanta...

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Problems solved by technology

However, since the diameter of the wire electrode is tens of microns, the mechanical strength is low, and its length is only about 100mm, it is difficult to make a larger reactor

There is also a coaxial electrode structure in which a porous aluminum oxide film is coated on the central metal electrode. Due to the complex coating process of the aluminum oxide film and the insufficient adhesion between the film and the metal electrode, the processing cost of the electrode is high and the use and maintenance are very inconvenient.

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