Automobile exhaust emission treatment device

Abstract

The invention provides an automobile exhaust emission treatment device which comprises a shell provided with a gas inlet and a gas outlet, a flow guide cover is arranged in the shell, a gas inlet cavity is formed between the flow guide cover and the gas inlet, and a first-stage treatment unit is arranged in the gas inlet cavity; the large opening end of the flow guide cover faces one side of the air inlet, the small opening end of the flow guide cover extends towards the bottom of the shell, an air passing cavity is formed in the inner side of the flow guide cover, and a second-stage treatment unit is arranged in the air passing cavity; a gas collection cavity is formed between the flow guide cover and the bottom of the shell, an exhaust cavity is formed between the outer wall of the flow guide cover and the inner wall of the shell, and a third-stage treatment unit is arranged in the exhaust cavity; a tail treatment unit is arranged at the bottom of the inner side of the shell corresponding to the small opening end of the flow guide cover, namely, the tail treatment unit is mounted in the gas collection cavity. The automobile exhaust purifier is reasonable in structural design, the internal space of the shell is ingeniously utilized, a multi-stage purification structure is designed, the purification treatment effect of automobile exhaust is effectively improved, the working stability is high, and the service life is long.

Description

technical field [0001] The invention and creation belong to the technical field of exhaust gas treatment equipment, in particular to an automobile exhaust emission treatment device. Background technique [0002] During the working process of the engine of a fuel vehicle, a large amount of harmful gases such as carbon monoxide, nitrides, and hydrocarbons will be produced. Usually, an exhaust system with an exhaust gas purification treatment device is used to purify the exhaust gas, and the harmful gas is used as a catalyst. Oxidation and reduction convert to harmless carbon dioxide, water and nitrogen. Traditional exhaust systems generally include exhaust manifolds, main exhaust pipes, exhaust purification devices, mufflers, exhaust tail pipes and other components. The coated catalyst coating undergoes oxidation and reduction reactions with harmful gases. However, the purification treatment effect of the existing exhaust gas purification treatment device is insufficient, re...

AI Technical Summary

Problems solved by technology

However, the purification effect of the existing exhaust gas purification treatment device is insufficient, resulting in the exhausted exhaust gas still remaining incomplete combustion substances such as hydrocarbons, CO, NO, etc., due to the long axial length of the exhaust gas purification treatment device, it takes up a large space , not only affects the overall layout of the exhaust system, but also when the exhaust gas travels along the long axial path, the gas close to the shell of the exhaust gas purification treatment device will exchange more heat with the outside world, resulting in increased heat loss of the exhaust gas and affecting the catalytic performance. Effect

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