Waste water treatment system

Abstract

The invention discloses a waste water treatment system comprising a direct-current high-voltage pulse power supply, a direct-current high-voltage narrow pulse discharge system, a water injection system, an advanced oxidation reaction system, a water discharging system and a master control system, wherein strongly oxidized active substance is generated through the direct-current high-voltage narrow pulse discharge system and reacts with organics in the injected waste water to instantly oxidize the organics, so that macromolecule organics become micromolecule organics, micromolecule organics finally generate dioxide and water, and then the discharge standard is achieved.

Description

technical field [0001] The invention relates to wastewater treatment technology, in particular to a wastewater treatment system based on low-temperature plasma technology. Background technique [0002] The low-temperature ion technology is to load the voltage on the electrode with a small curvature radius. Due to the partial discharge, dense high-energy electrons are generated. During the discharge process, the electrons collide with water molecules, organic molecules, and other molecules, atoms, and particles in the water. The excitation, decomposition and ionization of these neutral molecules are more intense, and the strong oxidizing active species (OH, O, O 3 、H 2 o 2 and other active particles), ultraviolet radiation, high-energy electron bombardment, etc., to achieve the purpose of removing toxic and harmful substances. [0003] At present, commonly used low-temperature plasma technologies include: glow discharge plasma, DC high-voltage pulse discharge plasma, diele...

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Problems solved by technology

[0004] In addition, although glow discharge and dielectric barrier discharge have certain applications in the fields of waste gas, malodorous gas, and wastewater treatment, glow discharge plasma belongs to low-pressure discharge technology, which is difficult for continuous production and high production cost, so it cannot be widely used Industrial production is currently limited to laboratories, lighting products and the semiconductor industry; with the development of low-temperature plasma technology and pulse power technology, DC high-voltage narrow pulse discharge technology has become a The field of treatment of high volume and refractory organic wastewater is one of the most promising technologies

However, the DC high-voltage pulse discharge plasma technology belongs to the corona discharge technology, and currently lacks a reliable DC high-voltage pulse power supply and a matching high-efficiency plasma discharge reactor; the dielectric barrier discharge plasma technology (DBD) is because the medium is easy Blockage and pollution, causing creepage phenomenon, resulting in a short circuit in the discharge circuit, and a large pressure loss

Although the above technologies have certain technical applications, they also show their own technical defects in the application.

[0005] Therefore, the water treatment equipment manufactured by using high-voltage AC plasma technology in the prior art is only in the laboratory stage, and high-voltage AC is very easy to produce radiation, which has a great impact on the environment and personnel, so it cannot be applied industrially.

As water treatment equipment for industrial application, the general equipment is relatively large in size, the amount of wastewater to be treated is small, and there are disadvantages such as difficult equipment maintenance and high power consumption, so it is difficult to realize industrial application.

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