| 摘要 |
In tornado flow dryers operating on helical flow or annular flow principles, excess drying media are withdrawn during operation of the dryers from the axial region of the drying chamber. The means for withdrawing the excess drying media is in the form of a pipe extending into the drying or reaction chamber along at least half of the length thereof, the pipe being provided with additional exhaust openings distributed over the length thereof.
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