Noise-reducing tail gas filter

Abstract

The invention relates to a noise-reducing tail gas filter. The noise-reducing tail gas filter comprises a filter box (1), a fire extinguisher (7) and a silencer (8). A filter screen (2) and a ceramic honeycomb carrier (3) are arranged in the filter box (1), a silencing tube (9) is arranged in the filter box (1), and a branch tube (10) with holes on the wall is arranged on the silencing tube (9). According to the noise-reducing tail gas filter provided by the invention, firstly, under the action of the silencer and the fire extinguisher, noise is reduced and the fire is extinguished; then acidic components in the tail gas are eliminated by means of sodium carbonate water mist; and finally, under two-stage filtration of the filter screen and the ceramic honeycomb carrier, tail gas, the main components of which are CO, HC and NOx, is reacted to form CO2, H2O, N2 and O2, and meanwhile, micropores in the isolating walls can effectively filter black smoke particles which can be combusted under the action of a catalyst coating, so that the tail gas purifying effect is further improved; and meanwhile, the filter is good in silencing effect.

Description

technical field [0001] The invention relates to a noise-reducing exhaust gas filter, which is used for purifying the exhaust gas of automobiles. It belongs to the technical field of automobile equipment. Background technique [0002] At present, ordinary automobile exhaust filters use catalysts to interact with NO and NO in automobile exhaust. 2 react with CO to form CO 2 and N 2 These two kinds of non-polluting gases, but the cars equipped with diesel engines, because the exhaust gas of diesel engines contains black smoke particles, the existing exhaust filter can not effectively filter the black smoke particles, which will cause environmental pollution; the existing tail gas silencer is It is realized by setting the sound-absorbing sheet, but the sound-absorbing sheet is easy to loosen and fall off, and it is difficult to achieve a good sound-absorbing effect. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned defici...

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Problems solved by technology

[0002] At present, ordinary automobile exhaust filters use catalysts to interact with NO and NO in automobile exhaust. 2 react with CO to produce CO 2 and N 2 These two kinds of non-polluting gases, but the cars equipped with diesel engines, because the exhaust gas of diesel engines contains black smoke particles, the existing exhaust filter can not effectively filter the black smoke particles, which will cause environmental pollution; the existing tail gas silencer is It is realized by setting the sound-absorbing sheet, but the sound-absorbing sheet is easy to loosen and fall off, and it is difficult to achieve a good sound-absorbing effect

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