A fluid bed dryer comprising a bed plate, and use of such a plate in a fluid bed dryer

摘要

A fluid bed dryer comprises a bed plate (13) having gas distributing openings (27,28) in the plate. The gas distributing openings are arranged in pairs of substantially oppositely directed openings, and a depressed portion (29) of the plate extends between the openings (27,28) of each pair. By suitably choosing the relationship of the effective area of the oppositely directed openings in the pairs of openings it is possible to obtain a desired relationship between the vertical fluidizing component (33) and the horizontal transporting component (34) of the upwardly directed gas flow (32) through the openings (27, 28) the bridge plate.