| 摘要 |
The invention relates to a method and an apparatus for drying pourable material in a drying silo (1) by means of an air flow. The used air flow (5) that is discharged from the drying silo (1) or the returning air is dried in a drying cell (6) containing a drying agent or adsorbent and is fed to the pourable material as a dry air flow (3). If necessary, the adsorbent is regenerated in the drying cell (6). The used air flow (5) is fed to a supply duct that is disposed in the drying cell (6) and is connected to the adsorbent, is deflected in the drying cell (6), is conducted across the adsorbent, is then deflected once again as a dry air flow (3), is withdrawn in a discharge duct against the direction of flow in the supply duct, and is fed to the drying silo (1). The drying cell (6) that is designed as a wheel-type drier is rotated in stages or continuously. The drying cell (6) is designed as a drum comprising at least three concentric, axially extending zones (20, 21, 22). The adsorbent is located in the central zone (20), while the two other, external and internal zones (21, 22) are designed as ducts for the used air flow (5) or the dry air flow (3). The ducts are connected to the zone (20) containing the adsorbent in order to allow air to penetrate therebetween. |
