METHOD AND APPARATUS FOR CONTROLLING A STREAM OF SOLIDS

摘要

There are described a method and an apparatus for controlling the level and/or the inventory in a fluidized bed in a fluidized-bed tank, wherein a stream of solids is withdrawn from the fluidized-bed tank via a downer, the stream of solids is fluidized at the bottom of the downer by supplying a conveying gas flow and is conveyed to the top through a riser branching off from the downer. The size of the stream of solids conveyed through the riser is varied by the variable supply of the conveying gas, wherein the level of the solids or the solids inventory in the solids tank is used as a control variable and the volume flow rate of the conveying gas is used as an actuating variable of a control circuit.