Potential fluidization device for conveying powder materials in a hyperdense bed

摘要

Device for transporting powder comprising a conveyer, which includes a lower channel in which a gas circulates, and an upper channel, designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall 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 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 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, which creates a substantially constant pressure drop.

主权项

1. Device for transporting a powder, between a supply zone and at least one zone to be supplied, including a conveyer, which includes a lower channel, designed for the circulation of a gas, and an upper channel, designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall that can be crossed by said gas, the lower channel being connected to a gas supply pipe able to supply said lower channel with gas at a fluidization pressure such that it allows the potential fluidization of said powder in said upper channel, said upper channel being provided in its upper part with transverse walls forming an obstacle to the circulation of said gas and said powder, said transverse walls being laid out to form with an upper wall of said channel at least one space, in which a gas bubble under pressure is formed, at a given bubble pressure, resulting from putting said conveyer under potential fluidization pressure, said conveyer consisting of boxes each of which corresponds to a given bubble, said device being characterized in that, at the level of at least one bubble, the wall of the upper channel is provided with a means of removal of the fluidization gas connecting said bubble to an external environment and including a means of creating pressure drop which creates a substantially constant pressure drop.