| 摘要 |
An apparatus for the pneumatic conveyance of pulverulent or granular material, has a reservoir for the material, a fluidization barrier in the reservoir, an outlet for material flowing from above the barrier in the reservoir, an inlet conduit for fluidization gas opening below the barrier, a conveyor conduit connected to the outlet, an inlet conduit for pressurized conveying gas opening into the conveyor conduit, a first valve in the inlet conduit for fluidization gas, a second valve in the inlet conduit for conveying gas and control means for the said first and second valves arranged to control both the valves in dependence upon pressure in the conveyor conduit and to maintain said second valve partly open when said first valve is open but to open said second valve beyond a predetermined opening degree when said first valve is completely closed.
|
