CLOSED DEVICE WITH POTENTIAL FLUIDIZATION FOR HORIZONTALLY CONVEYING PULVE-RULENT MATERIALS IN A DENSE BED

摘要

A closed apparatus of potential fluidization type, for conveying powder materials in a dense bed from a storage region (31) to at least one region to be fed therewith, comprising a storage tank (48) for storing the powder material, referred to as a reserve container, which comprises between the two regions at least one horizontal conveyor (33) formed by a lower duct (35) for a flow of gas, an upper duct (36) for a flow of the powder material and the gas, between which ducts is disposed a porous wall (34), and at least one conduit (38) for feeding gas to the lower duct, which makes it possible to establish a pressure Pf that creates a dense potential-fluidization bed of the powder material that fills the conveyor, by virtue of the presence of at least one balancing column (39), the filling height (56) of which balances the pressure Pf of the potential-fluidization gas, the improvement wherein the closed storage tank or reserve container (48) of the region to be supplied with material, being provided with an inlet for introducing (47) and an outlet for removing (51) the powder material, is also provided with at least one opening (52) disposed above the limit level of filling with powder material, which opening establishes an equilibrium in respect of pressures between the inside and the outside of said reserve container.