An experimental study of the techniques of reducing power consumption in pneumatic conveying granular materials. Effects of pulsating motion of conveying air and vibratory motion of conveying pipe.

The effects of pulsating motion induced in conveying air and vibratory motion applied to a pipe wall on power consumption in pneumatic conveying of granular materials were examined experimentally. The experiments were performed using a horizontal pipe 4.2 m in length and 52 mm in diameter and millet grain as the conveyed material. It is concluded that the application of pulsation to air and vibration to pipe are effective in reducing the power consumption. The power consumption is tolerably reduced compared to that for an ordinary dense phase type of pneumatic conveying. (English abstract)