Reaction apparatus for degrading dye wastewater by using low-temperature plasma technique

Abstract

The invention discloses an apparatus for treating refractory organic wastewater, particularly relates to an apparatus for degrading dye wastewater by using low-temperature plasma technique, and belongs to the field of wastewater treatment. The apparatus comprises an insulating medium pipe and an aerator, wherein the outer surface of the insulating medium pipe is covered with a low-voltage discharge electrode, and the aerator is arranged in the insulating medium pipe; the insulating medium pipe is provided with a gas outlet, a gas inlet, a water outlet and a water inlet, and a high-voltage discharge electrode is disposed in the aerator. The apparatus of the invention is simple in structure, simple to operate, good in discoloring effect and high in water treatment efficiency; through diffusion of the microporous aerator into a liquid, and a route at which plasma enters wastewater can be shortened. The reaction apparatus of the invention can discolor a dye fast and is effective in degrading the dye macromolecular organics in the dye, the obtained small-molecules provide enhanced macromolecular organics in the dye can be effectively degraded, small-molecular wastewater obtained provide enhanced biochemical properties for the wastewater, subsequent biological treatment is facilitated, the apparatus has unique advantages in the dye wastewater treatment process, and at certain voltage, and the apparatus is up to 98% in removal rate 10 minutes after.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a device for treating difficult-to-degrade organic wastewater, in particular to a device for treating dye wastewater by using low-temperature plasma technology. Background technique [0002] The dye industry is an important part of my country’s textile, light industry, chemical industry and other fields. At present, with the rapid development of the dye industry and the progress of printing and dyeing processing technology, most dyes have anti-photolysis, anti-oxidation and anti-biological properties. The characteristics of degradability increase the difficulty of decolorization of dyes and printing and dyeing wastewater. Dye wastewater is a typical refractory industrial wastewater. It has the characteristics of high concentration, high toxicity, high chroma, and poor biodegradability. Traditional dye wastewater is treated with a combination of conventional physicochemical and biochem...

AI Technical Summary

Problems solved by technology

Although these three kinds of discharge plasma water treatment reactors have shown relatively ideal effects in the treatment of refractory organic waste water, there are still some problems, such as discharge in water, severe electrode corrosion, short electrode life; greatly affected by the conductivity of the solution; The amount of liquid in gas-phase discharge is limited, and the diffusion efficiency of free radicals into the liquid is low, which affects the water treatment effect, etc.

However, there are still some disadvantages in the ozone generator currently used in practice: such as the need for additional cooling equipment and ozone transmission pipeline system, which increases the processing cost, and there are problems of ozone loss and pipeline corrosion

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