| 摘要 |
The invention concerns a method for conveying on a high density bed powder material enabling to avoid obstacle, by inserting between two horizontal conveyors, one upstream (T1) and the other downstream (T2), a device for avoiding (10; 20; 30) the obstacle, comprising three casings: at the device intake, an upstream casing (S1) comprising a lower duct (S1.1) supplied with gas at pressure P1 and an upper duct (S1.2) essentially consisting of a column (C1); in the middle, at a level enabling to avoid the obstacle, an intermediate casing (S3); at the device outlet, a downstream casing (S2) comprising a lower duct (S2.1) supplied with gas at pressure P2 and an upper duct (S2.2), essentially consisting of a column (C2). At all times, the three casings stand filled with the powder material maintained in potential fluidising state, the P1-P2 difference being maintained positive. |
