Theoretical and experimental modelling of cydone separator as diesel soot particular emission arrester with a continuous ceramic packed fibber filter placed at the end on the vortex finder tube

摘要

Air borne particulates are known to constitute a major human health risk. Recent epidemiological studies reported that particles with diameters of less than 2.5 micron are most dangerous - a fact of particular relevance to diesel emissions that are principally in this range of respirable particulates. The reduction of particulate emissions from diesel engines is one of the most challenging problems associated with the exhaust air pollution control. Diesel particulate filters (DPF) hold out the prospects of substantially reducing regulated particulate emissions but the question of the reliable regeneration of filters still remains a difficult hurdle. Many of the solutions proposed to date suffer from high engineering complexity, cost, thermal cracking, increased backpressure which in turn deteriorates diesel engine combustion performance. This paper proposes an improved computer aided theoretical modeling of cyclone separator - a non contact type particulate removal system with a continuous ceramic packed fiber filter placed at the end of the vortex finder tube for arresting diesel soot particulate emission. Proposed improved grade efficiency model presents increased diesel soot particulate collection efficiency. Proposed modified empirical pressure drop model which is a summation of cyclone and packed ceramic fiber filter pressure drop are within allowable range of diesel engine operation. Result shows good agreements with the existing cyclone flow, DPF flow characteristics and with the existing studies of cyclone as a DPF. Proposed collection efficiency and pressure drop models give good validation against experimental studies conducted in this study.