| 摘要 |
<p>Powder is fed from a hopper (8) into the pressure balancing column (2) where it is weighed by a load cell (46). It is fluidised by air (26) through a grid (14). At the bottom of the column is a connection (44) to a transportation chamber (4) where the powder is kept fluidised (16, 28). Conveyor air is supplied to the chamber through a pipe (22) terminating in a nozzle (18). This blows directly into the outlet tube (6, 20), also entraining the powder. The pressure of air is constantly measured by a probe (36) and fed to a control unit to adjust the delivery of powder into the column through a valve (10).</p> |
