Aftertreatment device for motor vehicle exhaust and use method

Abstract

The invention discloses an aftertreatment device for motor vehicle exhaust. The aftertreatment device comprises a first square pipe; a second square pipe is fixedly mounted on the outer side of the first square pipe; a first round pipe is mounted at one end of the first square pipe; round plates are symmetrically arranged inside the first square pipe; and first supporting plates fixedly connectedwith the inner wall of the first square pipe are rotationally connected on the outer sides of the round plates. The aftertreatment device has the beneficial effects as follows: the aftertreatment device is simple in structure and convenient to operate, the condition that chippings produced by breakage of the aftertreatment device for the motor vehicle exhaust after collisions enter an exhaust pipeto block the exhaust pipe can be avoided, the contact time of the exhaust and a catalyst can be prolonged, the contact area of the exhaust and the catalyst can be increased, the temperature of the exhaust can be reduced, the exhaust can reach the optimal catalytic temperature, mist of the liquid catalyst can be mixed in the exhaust when the exhaust is about to be discharged out of the exhaust pipe, thus the exhaust is further degraded, and the practicability is high.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment, in particular to a motor vehicle tail gas post-treatment device and a usage method. Background technique [0002] At present, with the progress of the times, automobiles have become an indispensable part of people's lives. However, although the development of the automobile industry has brought great benefits to mankind, it also pollutes our living environment. The exhaust gas produced by automobiles during driving contains Harmful gases, thus causing greater pollution to the atmosphere, especially in large and medium-sized cities, the number of automobiles is on the rise in a straight line, and the emission of automobile exhaust has caused great harm to the health of urban residents. It is the main cause of air pollution in modern cities. The main source, in order to solve the above problems, various automobile exhaust treatment devices have been developed. The existing exhaust gas tr...

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Problems solved by technology

[0002] At present, with the progress of the times, automobiles have become an indispensable part of people's lives. However, although the development of the automobile industry has brought great benefits to mankind, it also pollutes our living environment. The exhaust gas produced by automobiles during driving contains Harmful gases, thus causing greater pollution to the atmosphere, especially in large and medium-sized cities, the number of automobiles is on the rise in a straight line, and the emission of automobile exhaust has caused great harm to the health of urban residents. It is the main cause of air pollution in modern cities. The main source, in order to solve the above problems, various automobile exhaust treatment devices have been developed. The existing exhaust gas treatment devices are three-way catalytic converters, but the use of three-way catalytic converters will have the following problems. Most of the first and three-way catalytic converters The interior is a catalyst carrier formed by honeycomb ceramic plates, which are easily broken after collision, causing the catalyst to fail and the exhaust pipe to be blocked. Second, the contact area between the honeycomb ceramic plates and the exhaust gas is small, and at least half of the exhaust gas is not in contact with the honeycomb ceramic plates. Exhausted into the air, and the exhaust gas stays in the three-way catalytic converter for a short time, the catalytic effect is not good. Third, the three-way catalytic converter uses the honeycomb ceramic plate carrying the catalyst to catalyze the decomposition of harmful substances in the exhaust gas, so Only at a certain temperature can the catalytic effect be maximized. However, when the existing exhaust gas is discharged, the temperature is relatively high, which reduces the catalytic efficiency in stages. Fourth, there is no subsequent treatment for the exhaust gas that is about to be discharged from the exhaust pipe, which will cause air Increased pollutant gases in

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