Sanko Air Plant Ltd.

On the other hand, the fault points are the line plugging can be occurred easily when the conveying condition is changed, because the gas velocity is near the conveying possible limit velocity of Floating Flow. Also, the Layer Flow and Suspension Flow are coexisting in the same line, because the gas velocity inside the conveying pipe is changed by the conveying condition (conveying capacity, distance etc). And in case of powder conveying, Layer Flow (Middle Velocity) and Dune Flow are coexisting quite often. Although the gas velocity of Layer Flow is belonged to low range for Floating Flow (Dilute Phase) basically, SANKO call Middle Velocity Conveying, to distinguish with Plug Flow and also Dune Flow. SANKO’s Middle Velocity Conveying System have good advantage to avoid some problems like ①Conveying material quality fall, Conveying pipe abrasion, occurrence of streamer by excessive velocity in end point. ②Powder remaining and Line plugging at the feeding point by shortage of gas velocity and pressure fluctuation. Our the system is realized not only reducing initial cost and running cost but also stable conveying operation.