Waste gas treatment method and system based on low-temperature plasma

Abstract

The invention discloses a waste gas treatment method and system based on low-temperature plasma, and relates to the technical field of low-temperature plasma waste gas treatment, and the method comprises the following steps: calibrating the relation between the input power and degradation rate of a low-temperature plasma reactor; adjusting the input power according to the degradation rate; after being treated by the low-temperature plasma reactor, the waste gas is fed into the tail gas treatment unit to be treated so as to degrade byproducts generated in the waste gas treatment process; monitoring the concentration of the waste gas, the emission concentration of the waste gas and the emission concentration of byproducts in real time; if the current waste gas emission concentration is smaller than the waste gas emission index, gradually reducing the input power; and if the current waste gas emission concentration is not smaller than the waste gas emission index, the input power is gradually increased until the input power can enable the waste gas emission concentration to meet the waste gas emission index, and the byproduct emission concentration under the current waste gas inlet concentration can be promoted to be relatively low. The technical problem of how to balance the byproduct emission concentration and the waste gas emission concentration is solved.

Description

technical field [0001] The invention relates to the technical field of low-temperature plasma waste gas treatment. Background technique [0002] Low-temperature plasma technology is a new technology for waste gas treatment developed in recent years. Its working principle is to use high-voltage electrodes to discharge and breakdown the gas to generate plasma. Plasma is the fourth substance discovered by humans after gas, liquid and solid. The form is composed of a large number of high-energy charged particles and neutral particles, and it is generally electrically neutral, but it has strong chemical activity. These active substances decompose pollutant molecules in a very short time to achieve the purpose of degrading pollutants. Although the temperature of the electrons is high during the discharge process, the temperature of the heavy particles is very low, and the whole is in a low-temperature state, so it is called low-temperature plasma. [0003] Although low-temperatu...

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Problems solved by technology

[0003] Although low-temperature plasma has a good purification effect on exhaust gas, the problem that is often overlooked is that by-products are produced when low-temperature plasma treats exhaust gas, and the by-products contain more active substances. The exhaust gas contains a high concentration of active substances, especially the high content of ozone. If the exhaust gas after low-temperature plasma treatment is directly discharged, even if the content of harmful substances in the exhaust gas reaches the standard, the active substances are often difficult to meet the emission standards. cause environmental damage

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