Patent ID: 8764350

Claim:
A method for conveying a powder including dust in a fluidized bed transport duct from an inlet point to at least one discharge point, comprising: feeding powder including dust into the transport duct at the inlet point; supplying gas to the transport duct to fluidize the powder in the transport duct to transport the powder to the at least one discharge point downstream of the transport duct; removing gas from the transport duct via a gas outlet transport duct bypass; separating dust from the removed gas in the gas outlet transport duct bypass by means of a dust separator having an inlet for receiving dust laden gas, a first outlet for collecting the dust from the dust laden gas, and a second outlet for collecting de-dusted gas having the dust separated therefrom; and returning the separated dust from the gas outlet transport duct bypass to the fluidized powder by the first outlet which is arranged proximate said at least one discharge point downstream of said transport duct, wherein the separated dust is mixed back into the powder in a mixing region in a lower portion of the dust separator.