Automobile tail gas particulate matter trap and filter element

Abstract

The invention discloses an automobile tail gas particulate matter trap and a filter element. A particulate matter coagulation unit (20), a charging unit (5) and the filter element (7) are arranged in a shell (8) in sequence in a direction from air inlet to air outlet, and the filter element (7) is wound into a cylindrical shape through a metal fiber plate (70). The metal fiber plate (70) comprises two metal fiber filtration and adsorption outer surface layers (71) and an electric heating film layer (73) clamped between the two metal fiber filtration and adsorption outer surface layers; heat conduction insulation layers (72) are arranged between the metal fiber filtration and adsorption outer surface layers (71) and the electric heating film layer (73); and the cross sections of the metal fiber filtration and adsorption outer surface layers (71) are corrugated, and the metal fiber filtration and adsorption outer surface layers (71) guide tail gas in the longitudinal direction. The automobile tail gas particulate matter trap is integrated with multiple functions of electrostatic adsorption and dust removal, filter element diffusion, intercepting, collision mechanism dust removing and the like, and the particulate matter trap effect is improved; the exhaust pressure loss of an engine is small, and the particulate matter trap effect is good; and the filter element is convenient to regenerate and reliable, and has the advantages of being low in use and maintenance cost and is suitable for popularization.

Description

technical field [0001] The invention relates to a particle trap for engine exhaust gas, in particular to a particle trap for automobile exhaust gas and a filter element thereof, belonging to the technical field of engine exhaust gas treatment. Background technique [0002] Various types of engines, such as gasoline engines, diesel engines, and other fuel-gas internal combustion engines, include gas pollutants and particulate matter pollutants in the exhaust gas, among which particulate matter pollutants are one of the main sources of PM10 and PM2.5 in the air. Serious affect human health. The role of the particulate filter is to trap the particulate matter contained in the exhaust gas, so that the exhaust gas entering the air is cleaner. [0003] The core component of the particle filter installed in existing vehicles is a special filter element, which is generally a porous ceramic filter material, and the market is basically monopolized by products from Germany, the United...

AI Technical Summary

Problems solved by technology

The current particle filter based on ceramic filter material has the advantage of high particle capture efficiency, but the particle filter needs to be cleaned after a period of use

The process of cleaning and accumulating particulate matter is called regeneration. Combustion is generally used, and a special complex regeneration system is used for fuel injection combustion or electric heating combustion. The operation is complicated and it is easy to cause damage to the thermal stress of the ceramic filter element.

It is generally believed that the current ceramic filter particle filter has two major disadvantages: 1. The exhaust back pressure of the engine is high, the fuel consumption of the engine will increase, and the efficiency will decrease, especially after a period of use due to the accumulation of captured particles. more serious

2. The regeneration operation process is complicated, and the use and maintenance costs are high

Electrostatic precipitator technology has been maturely applied to large-scale dust emission treatment occasions for many years, such as thermal power plants, steel mills and other departments. However, due to the small particle size of engine exhaust particles, which are mainly concentrated in 0.1um-0.5um, general electrostatic capture The effect is poor, and there are no practical and effective related products on the market

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