A FLUIDIZED BED APPARATUS

摘要

The invention relates to a spouting fluidized bed apparatus (10) that comprises a hollow body (12) defining an internal space (13) including a downwardly tapering lower section (14) and an upper section (16) that extends operatively upwardly from the lower section (14). The hollow body (12) defines a gas inlet opening (24) at its operative lower end, that communicates with a gas feed duct (32), and a gas outlet (18) that leads from the hollow body near its operative upper end. A heat exchanger arrangement (22) comprising an elongate fluid conduit (21) is located within the tapering lower section (14) of the hollow body (12). The conduit (21) defines an extended flow path for a heated medium within the lower section (14) and thereby provides for heat transfer from the conduit to particulate product and gases in the said lower section, during use of the apparatus and with the particulate product defining a fluidized bed of particles in the said lower section.