A water-cooled ntp generator based on packed bed dielectric barrier discharge

Abstract

The invention discloses a discharge-resistant water-cooled type NTP producer based on a packed bed medium. The discharge-resistant water-cooled type NTP producer comprises a shell, a discharge area and an insulating layer. The discharge area is composed of a low-voltage electrode, a quartz tube, filling particles and a high-voltage electrode, the low-voltage electrode, the quartz tube, and the high-voltage electrode are arranged coaxially. The insulating layer is formed by compounding of a plurality of materials, the innermost layer is an insulating layer quartz tube, three layers of heat conducting insulating silicon adhesive fabric and insulating adhesive tape cover the outer side of the quartz tube alternately, and an organic silicone pouring sealant is filled in the gap between the high-voltage electrode and the inner side of a stainless steel joint. The shell is organic glass, the inner side of the shell is a low-voltage electrode channel, and an inner layer of the insulating layer quartz tube is a high-voltage electrode water-cooled channel. According to the discharge-resistant water-cooled type NTP producer based on the packed bed medium, a residence time of a reaction gas can be prolonged, the conversion rate of the reaction gas can be increased, the cooling effect of the high-voltage electrode can be strengthened, inner and external electrodes can reduce the temperature through water cooling, radiating conditions of the NTP producer are further optimized, and active substances are restrained from pyrolysis.

Description

technical field [0001] The invention belongs to the technical field of aftertreatment of diesel engine exhaust, in particular to a water-cooled NTP generator based on packed bed dielectric barrier discharge. Background technique [0002] In recent years, with the implementation of "Limits and Measurement Methods of Pollutant Emissions from Light-duty Vehicles (China's Sixth Stage)", stricter restrictions have been imposed on pollutants emitted by diesel engines for vehicles. Diesel engine particulate matter (Particulate matter, PM) and nitrogen oxides (NO X ) emissions, especially PM emissions, not only easily cause environmental problems such as smog and reduced visibility, but also easily cause respiratory diseases and seriously endanger human health. Therefore, it is particularly urgent to reduce the PM emissions of diesel engines. Compared with the national V, the national VI phase has tightened the PM emission limit by about 30%. Due to the increasingly stringent emi...

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Problems solved by technology

[0006] The present invention proposes a water-cooled NTP generator based on a packed bed dielectric barrier discharge based on the short residence time of the reaction gas, low conversion rate and poor heat dissipation conditions in the prior art, which lead to the easy pyrolysis of the generated active material. The purpose of the NTP generator is to increase the residence time of the reactant gas and improve the conversion rate of the reactant gas, to strengthen the cooling effect of the high-voltage electrode, so that the inner side can be cooled by water to reduce the temperature, thereby optimizing the heat dissipation conditions of the generator, and inhibiting the pyrolysis of the active material

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