Preheating and drying device

A preheater and dryer device, comprising:

• a housing having an upper end and a lower end;
• a first collector disposed inside the housing, the first collector having a chamber and a bottom opening defined therein and an inner wall;
• a feeding device attached to the upper end of the housing and extending into the housing, the feeding device containing a material to be preheated, the feeding device having an openable valve;
• a movable central conduit extending from the upper end of the housing to a bottom portion of the first collector, the central conduit being hollow for permitting a hot and dry air to pass therethrough and into the housing;
• a first conical shield attached to the central conduit, the conical shield being disposed below the feeding device, the first conical shield having bottom corners adjacent to the inner wall of the first collector;
• a second conical shield attached to a bottom end of the central conduit below the first conical shield;
• and
• the central conduit being movable between a first open position and a second closed position, the second conical shield being tightly held against the first collector to close the bottom opening thereof when the central conduit is in the second closed position and the second conical shield being separated from the first collector when the central conduit is in the first open position to permit the material to flow through the bottom opening.