Method of and apparatus for heat transfer in a fluidized bed

摘要

The bed to be fluidized is initially supported upon a grid provided with a plurality of similar channels the channels shown being V-shaped vertical section, so that the cross-sectional area of the fluidized bed therein continuously increases from the bottom of the channel to the top. A fluidizing medium under pressure is introduced into the chamber containing the grid and the fluidized bed, the fluidizing medium being divided and caused to flow upwardly through the fluidized bed through a plurality of holes through the bottom and the side walls of the channels of the grid, such holes being disposed at varying heights and in such a way that the flowing fluid is uniformly distributed along the height of the fluidized bed. A plurality of pipes containing a heat exchanging fluid are disposed in the channels of the grid. The invention may be employed in a number of chemical as well as physical processes such as the combustion of fuels, the roasting of zinc concentrates, the roasting of pyrites, etc.