FLUIDIZED BED DRYING APPARATUS

摘要

A fluidized bed drying apparatus (1) capable of drying brown coal while a fluidized bed (3) is formed by fluidizing the brown coal with fluidization gas is provided with: a drying furnace (5); and a gas dispersion board (6) dividing the inside of the drying furnace (5) into a chamber room (11) into which the fluidization gas flows and a drying room (12) into which the brown coal is supplied, and causing the fluidization gas to flow from the chamber room (11) into the drying room (12). A plurality of the chamber rooms (11) is disposed along the direction of fluidization of the brown coal. Into a first chamber room (18) positioned upstream of the direction of fluidization, a first fluidization gas with a low vapor concentration flows. Into a second chamber room (19) positioned downstream of the direction of fluidization, a second fluidization gas with a relatively high vapor concentration compared to the first fluidization gas flows.