| 摘要 |
A low pressure dryer (10) for granular or powdery material includes a plurality of canisters (12) rotatable about a common vertical axis serially among material heating (100), vacuum drying (102) and material inventory discharge (104) positions; pneumatic piston-cylinder means (34, 36, 38) for rotating the canisters (12) about said axis among said heating, vacuum drying and inventory discharge positions; means for heating (82) contents of a canister (12) at said heating position (100); means for sealing (40, 42) and drawing vacuum within a canister (12) at said vacuum drying position (102) and means (20) for selectably permitting downward flow of dried granular or powdery material out of a canister (12) at said discharge position (104) where said canisters move collectively and unitarily one with another. |
