POTENTIAL FLUIDIZATION DEVICE FOR CONVEYING POWDER MATERIALS IN A HYPERDENSE BED

摘要

Device for transporting powder (12) comprising a conveyer (3), which includes a lower channel (6) in which a gas circulates, and an upper channel (7), designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall (5) that said gas can pass through, the lower channel being supplied with gas at a pressure allowing the potential fluidization of said powder in said upper channel, said upper channel being provided in its upper part with transverse walls (50, 51, 52; 53; 50.i, 50.n) placed so that they delimit with the upper wall of said upper channel at least one upper zone in which a gas bubble under pressure is formed (20.1, 20.2; 20.i, 20.(i+l), 20.n) as a result of putting said air chute under potential fluidization pressure. At the level of at least one bubble so formed, the wall of the upper channel includes a means of removal for fluidization gas provided with a means of creating pressure drop (100.1, 100.2; 110.1, 110.2; 120.1, 120.2; 130, 61, 62; 140.i, 140. (i+1), 140.n), which creates a substantially constant pressure drop. Figure 4