A secondary purification device for automobile exhaust and its working process

Abstract

The invention provides an automobile tail gas secondary purifying device and a working process thereof. The automobile tail gas secondary purifying device comprises an exhaust guide tube, a power box and a tail gas treating fluid diversion cavity, wherein the inlet of the exhaust guide tube is provided with a gas cyclone; a wiring tube type plasma reactor is arranged in an exhaust guide tube channel; the outlet of the tail gas treating fluid diversion cavity communicates with four tangential rotational-flow slots to the outlet of the exhaust guide tube. According to the automobile tail gas secondary purifying device, the wiring tube type plasma reactor is adopted, a high-voltage alternating-current power supply is additionally arranged between a linear central electrode and an outer-layer tubular electrode, and a great number of low-temperature plasmas which are relatively uniform in distribution can be generated in a central cavity, so that the problem that the purifying efficiency is low due to the fact the plasmas are generated unevenly is solved; after being subjected to rotational-flow treatment, tail gas enters the wiring tube type plasma reactor, so that rotary gas flow sufficiently reacts with the low-temperature plasmas in the cavity, and therefore, the purifying efficiency is improved; and meanwhile, a tail gas treating fluid is sprayed into the outlet of the exhaust tube through the tangential rotational-flow slots for being atomized and rotated, and the tail gas treating fluid is sufficiently mixed with the tail gas, so that efficient secondary purifying treatment is realized.

Description

Technical field: [0001] The invention relates to a secondary purification device for automobile tail gas and its working process, which belongs to the technical field of automobile environmental protection. Background technique: [0002] Worldwide, automobile exhaust has become one of the most important sources of air pollution, and its most harmful components are mainly carbon monoxide (CO), nitrogen oxides (NO x ), hydrocarbons (HC) and particulate matter (PM). The emission of automobile exhaust seriously affects human life and health, and at the same time endangers the urban environment and even the entire natural ecosystem. Therefore, it is urgent to limit and control the pollution of automobile exhaust. [0003] The three-way catalytic technology is currently recognized internationally as the mainstream technology for reducing vehicle exhaust emissions, but it still has fatal weaknesses, such as the difficulty in matching the catalyst with the vehicle, the difficulty i...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a low-temperature plasma automobile tail gas secondary purification device and its working process based on swirling changes, and the tail gas is subjected to swirling treatment and then enters a line-tube plasma reactor for full reaction, so as to overcome the existing Plasma reactors have many drawbacks in purifying automobile exhaust, and at the same time use secondary treatment to achieve efficient purification of automobile exhaust

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