Patent ID: 6082021
Filing Date: 2000-07-04
Classification: B01J,F23C,F26B,F27D

Abstract:
A method for treating a bed of particulate material which is supported by a gas distribution bottom, utilizing a treatment gas which is conducted through a plurality of ducts in sectionalized manner to and directed up through the gas distribution bottom and the bed of material from one or several underlying compartments; the flow of the treatment gas through each duct being regulated by means of a flow regulator provided in each duct in order to compensate, at least in part, for a changing pressure drop through the bed; and each flow regulator being automatically movable in direct response to the gas flow rate in the respective duct; characterised in that the regulation is effected continuously variably within a predetermined range whereby the flow regulator reduces the gas passage area in the duct when the gas flow begins to rise, and vice versa.