Tail gas filter with good purifying effect

Abstract

The invention relates to a tail gas filter with a good purifying effect. The tail gas filter comprises a filter box (1), wherein a first filter screen (2), a first ceramic honeycomb carrier (3), a second ceramic honeycomb carrier (7) and a second filter screen (8) are sequentially arranged in the filter box (1) in the gas flow direction, wherein a silencing tube (9) is arranged in the filter box (1); and a branch tube (10) with holes in wall is arranged on the silencing tube (9). According to the tail gas filter with good purifying effect, under four-stage filtration of the first filter screen, the first ceramic honeycomb carrier, the second ceramic honeycomb carrier and the second filter screen, tail gas comprising main components of CO, HC and NOx are converted into CO2, H2O, N2 and O2 through reaction; and meanwhile, micro holes in partition walls can effectively filter black smoke particles in waste gas, and the black smoke particles are combusted under the action of a catalyst coating, so that tail gas purifying effect is further improved; and meanwhile, the filter has a good silencing effect.

Description

technical field [0001] The invention relates to an exhaust gas filter with good purification effect, which is used for purifying the exhaust gas of automobiles. It belongs to the technical field of automobile equipment. Background technique [0002] At present, many ordinary automobile exhaust filters are directly discharged without filtering, or the filter device is improper, which can easily lead to air pollution and noise pollution; especially, cars equipped with diesel engines, due to the exhaust There are black smoke particles in the air, and the existing exhaust gas filter cannot effectively filter the black smoke particles, which will cause environmental pollution; the existing exhaust gas silencing is realized by setting the silencing sheet, but the silencing sheet is easy to loosen and fall off, and it is not easy to play a more effective role. Good noise reduction effect. Contents of the invention [0003] The purpose of the present invention is to overcome abo...

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Problems solved by technology

[0002] At present, many ordinary automobile exhaust filters are directly discharged without filtering, or the filter device is improper, which can easily lead to air pollution and noise pollution; especially, cars equipped with diesel engines, due to the exhaust There are black smoke particles in the air, and the existing exhaust gas filter cannot effectively filter the black smoke particles, which will cause environmental pollution; the existing exhaust gas silencing is realized by setting the silencing sheet, but the silencing sheet is easy to loosen and fall off, and it is not easy to play a more effective role. good noise reduction

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