Car tail gas purifying device

Abstract

The invention discloses a car tail gas purifying device, and belongs to the field of automotive exhaust emission reduction. The car tail gas purifying device comprises a purifying ejector, a purifying room and a purifying tank for providing purifying matter for the purifying room. The purifying tank communicates with an adsorption cavity of the purifying ejector. The input end of the purifying ejector is connected with an engine exhaust pipe. The output end of the purifying ejector is connected with a gas inlet channel of the purifying room. The interior of the purifying room is divided into a plurality of purifying chambers through separation plates. The purifying chambers communicate through inner cavity channels. Tail gas enters the purifying room through the gas inlet channel, and the tail gas is exhausted out of a gas outlet channel after circularly flowing in all the purifying chambers to be purified. The car tail gas purifying device has the beneficial effects that zero emission of harmful mater of tail gas is achieved, engine power is further improved, combustion efficiency and fuel economy are improved, and cost is low.

Description

technical field [0001] The invention belongs to the field of motor vehicle tail gas emission reduction, and in particular relates to a vehicle tail gas purification device. Background technique [0002] The three-way catalytic converter is a filter device shaped like "honeycomb coal". It is installed after the exhaust manifold of the motor vehicle engine. The three-way catalytic converter does not have catalytic ability at room temperature, and its catalyst must be heated to a certain temperature before it can be oxidized or reduced. capacity, usually the reaction temperature of the three-way catalytic converter is 300-400°C, and the normal working temperature is generally 400-800°C. When the temperature exceeds 850-1000°C, the catalyst in the inner coating is likely to fall off and the carrier is broken. [0003] The catalyst is very sensitive to sulfur, lead, phosphorus, zinc and other elements. Sulfur and lead come from gasoline, while phosphorus and zinc come from lubri...

AI Technical Summary

Problems solved by technology

[0004] When the car works at low temperature for a long time, the three-way catalytic converter cannot be started, and the soot from the engine exhaust pipe will adhere to the surface of the catalyst, making it impossible to contact with CO and HC compounds. After a long time, the pores of the carrier will be blocked. affect its conversion efficiency

In addition, the exhaust emission is not smooth, and the power of the engine is difficult to exert, which is also the reason why many cars cannot run at high speed.

[0005] The tail gas of the existing tail gas purification device directly enters the liquid reducing agent, the contact time between the tail gas and the reducing agent is short, the reaction is not sufficient, the purification effect is poor, and the discharged tail gas still contains a large amount of CO and NO2, and the tail gas will reduce all the Reductant pollution, the service life of the reducing agent is very short, and the reducing agent needs to be replaced regularly to ensure the purification effect, resulting in very high cost of use, and it is inconvenient to replace the reducing agent

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