| 摘要 |
<p>The gas circulation circuit includes airlocks for product introduction and extraction; it also has a branching unit to separate a fraction of the gas flow from the circuit. The novel feature is arrangement of the branching unit at the fan (21), located on and tangential to, its periphery. Its location is just ahead of an outlet for the process gas circuit. A dust separator (28) follows the branching unit. The controller (26) is preferably used to remove up to 15% of the entire process gas stream. An independent claim is included for the corresponding drying method.</p> |
