Abstract
In order to reduce power consumption, pipe wear and conveying velocity, a pneumatic conveying system that a dune is installed in pipeline is proposed in this paper. An experimental study focuses on the effect of installed dune in the horizontal pneumatic conveying system in terms of the overall pressure drop and particle flow patterns. Polyethylene pellets with mean diameter of 3.1 mm were transported as test particles in a horizontal pipeline of 4.6 m length and 80 mm inside diameter. The mean air velocity was varied from 8 m/s to 17 m/s, and the solid mass flow rate from 0.08 kg/s to 0.38 kg/s. It is found that in the lower air velocity range, the pressure drop of the pneumatic conveying with installing dune was lower than that for the conventional pneumatic conveying system. The maximum reduction rate was 17 percent.
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