Search

Diesel engines release a range of harmful components into the environment in the form of gases, liquids, and particulate matter (PM). These components have a direct and indirect impact on human health and climate change. Wet scrubbers are used to clean diesel exhaust emissions, by bubbling them through a liquid (usually water) to reduce their temperature and remove some soluble components and particles. Then, these emissions pass through a filter to remove further diesel particulate matter. The PM-capturing mechanism, heat transfer mechanism, and fluid mechanism of a wet scrubber are reviewed. Several parameters have a major influence on wet scrubber performance, such as inlet gas velocity. Modeling of a wet scrubber can be conducted through thermodynamics analysis, heat transfer analysis, and computational simulation. These investigations may lead to optimizing wet scrubber performance, and then to reducing both humidity and temperature at the scrubber exit. This humidity reduction increases filter life and reduces maintenance costs.

This research investigates the influence of solid loading ratio , Reynolds number & angle of flow direction change on minor losses coefficient for two-phase flow type gas-solid through an orifice by manufacturing a special apparatus with solving the equations mathematically . Three different angles of elbow 15 , 30 & 45 deg. was chosen to study this effect on minor losses head and minor losses coefficient for a solid loading ratio range 0 to 1.9 , Reynolds number range 36209 to 78078 . It is found that the minor losses head decrease with increase of mixture velocity and Reynolds number with relationship of elbow angle increasing linearly with solid loading ratio increment . also the minor losses coefficient increasing with minor losses head increment and linearly with mixture velocity , Reynolds number as same as solid loading ratio . fig.(1) shows the apparatus which used in this research .