Low-temperature plasma waste gas treatment system

Abstract

The application discloses a low-temperature plasma waste gas treatment system, and mainly relates to the field of waste gas treatment. The low-temperature plasma waste gas treatment system comprises asprinkling tower, a plasma purifying device and a chimney which are connected in sequence in a communicating manner; a plurality of probes which are connected with a negative electrode of a power supply are arranged in the centre of the top of the plasma purifying device, and the probes are uniformly distributed in a circle; the inner wall of the plasma purifying device is connected with a positive electrode of the power supply. By adopting the technical scheme, when the probes and the inner wall of the plasma purifying device are energized, an electric field can be produced between the probes and the inner wall of the plasma purifying device, and the electric field can convert nearby VOCs (Volatile Organic Compounds) into non-toxic harmless gases, such as carbon dioxide and water vapour.In addition, if the waste gas still carries with oil stain gas, the oil stain can be adsorbed on the surfaces of the probes and flow to the bottom of the plasma purifying device along the probes. Therefore, the cleaning of a worker to oil stain is facilitated.

Description

technical field [0001] The invention relates to the field of exhaust gas treatment, in particular to a low-temperature plasma exhaust gas treatment system. Background technique [0002] VOCs are volatile organic compounds, which are a kind of common air pollutants. They mainly come from the exhaust gas emitted by factories. They are commonly found in paint production, chemical fiber industry, metal coating, chemical coatings, shoemaking and tanning, electroplating, plywood manufacturing, tires Manufacturing, wastewater treatment plants and other industries. Harmful volatile organic compounds mainly include acetone, toluene, phenol, dimethylaniline, formaldehyde, n-hexane, ethyl acetate, ethanol, etc. [0003] According to the national industrial waste gas emission standards, industrial waste gas must meet its emission standards when discharged, which requires corresponding treatment of VOCs in industrial waste gas during the discharge process. The traditional treatment meth...

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Problems solved by technology

The actual operating cost of the activated carbon adsorption method is relatively high, the replacement of activated carbon, desorption and secondary treatment are troublesome, the treatment effect is difficult to guarantee for a long time and monitored at any time, and there may be a variety of factors that cannot coexist, causing exothermic reactions and oxidation in the activated carbon bed. Polymerization reaction, with the continuous increase of the concentration, there are certain unsafe factors; the equipment used in the catalytic combustion method is easy to corrode, and the gas with low concentration needs to consume fuel and the treatment cost is high, the catalyst is easy to be poisoned, and at the same time, it is easy to form such as dioxin Secondary pollution, etc.; while the by-products produced by the absorption method need subsequent treatment, there is no actual degradation effect on insoluble or slightly soluble gases, the price of the absorbent is high, it is not easy to regenerate, and the operating cost is high; biological filtration treatment is harmful to all The organic factors for degradation are selective, biodegradation generally requires a long residence time, and there are certain requirements for the collection of waste gas and construction sites. The stability of degradation has yet to be investigated, and there are also certain problems in terms of comprehensive costs.

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