Fluidized-bed plant

A fluidized-bed plant, notably for heat-processing metal goods, such as wires, bars and the like, comprising at least one chamber filled partly at least with a powdered material suspended in a gas, and at least one disperser provided adjacent the chamber bottom, from which the gas may be fed and distributed substantially continuously inside said chamber, and said disperser further comprising means to effect a gas re-circulation inside said disperser, said chamber having an elongated shape and being divided along the length-wise direction thereof, into at least two succeeding adjacent zones, at least one disperser being provided in each said zone, a said disperser from one zone being controlled independently from a said disperser in another zone, in such a way that gas may be selectively fed to one zone at a selected temperature without affecting another zone.

A fluidized-bed plant, notably for heat-processing metal goods, such as wires, bars and the like, comprising at least one chamber filled partly at least with a powdered material suspended in a gas, and at least one disperser provided adjacent the chamber bottom, from which the gas may be fed and distributed substantially continuously inside said chamber, and said disperser further comprising means to effect a gas re-circulation inside said disperser, said disperser comprising at least one tube-like element in the shape of a closed loop, connected to a source of pressurized gas, in such a way that the gas will be fed to said loop along a well-determined direction and thus part of said gas will flow in a closed circuit along said direction in said loop, perforations being provided in the tube-like element wall to allow the other gas part to be distributed into said chamber, said disperser being located between two substantially vertical guide plates allowing upward direction of the gas and throttling of the gas stream from the disperser.