Abstract
Given the severe pollution caused by particulate matters in diesel engine exhaust, we discuss herein the problem of exhaust back-pressure and regeneration of commonly used diesel particulate filter treatment technology. This paper proposes a method based on water film adsorption to remove exhaust particles from exhaust gas. Particulates flowing through the purification device are adsorbed by the continuous isobaric water film formed on the wave adsorption plate. The formation process and characteristics of the equal pressure-differential water film are studied through combined theoretical analysis and experimental verification. The regeneration process and influencing factors of the purification system are also analyzed, and the treatment of the device is verified. Experiments show that the device offers a better purification of exhaust particulates with lower exhaust resistance and regeneration of the system during the treatment.
Highlights
During the operation of the diesel engine, the main pollutants in the exhaust gas are nitrogen oxides and solid particles because of the high air–fuel ratio and low combustion efficiency of diesel fuel
Liu et al.11 used Fire software to simulate the regeneration process of the Diesel Particulate Filter (DPF), which showed that the exhaust back-pressure during filtration could be reduced by increasing the Channel’s Per Square Inch (CPSI) and using a moderate gas flow rate
Real-time autonomous regeneration of the DPF remains imperfect. To treat these two problems, we propose a method based on water film adsorption to separate out and purify exhaust particles
Summary
During the operation of the diesel engine, the main pollutants in the exhaust gas are nitrogen oxides and solid particles because of the high air–fuel ratio and low combustion efficiency of diesel fuel. The usual method to filter out these particles is to use a Diesel Particulate Filter (DPF), which causes problems of exhaust back-pressure, regeneration, and loss of filtration efficiency.. Real-time autonomous regeneration of the DPF remains imperfect To treat these two problems, we propose a method based on water film adsorption to separate out and purify exhaust particles. Scitation.org/journal/adv water film is formed on the surface of the adsorption plate so that particles will collide with the water film and be absorbed onto the wall This method increases the efficiency with which exhaust particles are trapped and reduces the resistance in the exhaust process, which improves the performance of the diesel engine
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