Fluidized bed apparatus including double chamber cartridge filter system

Abstract

A fluidized bed apparatus having a downwardly opening filter housing and including multiple processing gas outlets and a partition structure dividing the interior of the filter housing into individual downwardly-opening open-bottom compartments equal in number to the gas outlets. The partition structure extends into an expansion chamber below the filter housing. The partition structure that divides the housing not only extends the full height of the filter housing portion, but projects appreciably downwardly therefrom into the upper portion of the expansion chamber disposed below the filter housing. Each gas outlet is associated with a filter cartridge mounted on a tubular fitting. The gas filter cartridge is tubular and filters the gas passing through each of the divided filter housing compartments. Each gas outlet has an exhaust fitting operatively associated therewith on the exterior of the casing and the exhaust fittings open into multiple arms of a connection fitting through gas flow on/off valves which may be selectively opened and closed. The connection fitting discharges into a discharge duct having a gas flow modulating valve operatively associated therewith. Additionally, each gas outlet and tubular air filter cartridge has a compressed gas supply structure operatively associated therewith whereby appreciable quantities of gas under pressure may be supplied to the interiors of the filter cartridges for cleaning the same when the gas flow on/off valves operatively associated with the corresponding exhaust fittings are closed.