| 摘要 |
The invention concerns a method for conveying a powder material (12) on high-density bed by potential fluidisation, using a device comprising at least an air pipe system (3) comprising a lower pipe (5) for circulating a fluidizing gas (G), an upper pipe (7) for circulating the powder material (12), the two pipes being separated by a porous wall (6), at least a pipe (8) supplying gas (G) and an adjusting column (4.1, 4.2) whereof the filling height (h) adjusts the potential fluidisation (pf) pressure. The invention is characterised in that it consists in generating in the upper pipe (7) of the air pipe system (3) a gas bubble (B1, B2) under pressure. Said bubble is durably located in said air pipe system (3) upper pipe (7) upper portion (14). The invention also concerns device for implementing the method and for regulating the gas bubble pressure. |
