Method for stabilizing particulate low rank coal in a fluidized bed

摘要

An improved method for drying particulate low rank coal in a fluidized bed wherein the improvement comprises fluidizing the coal above a first portion of a gas flow distributor using a hot fluidizing gas and fluidizing the coal above a second portion of the gas flow distributor with a recycle gas stream at a temperature less than about 200 DEG F. wherein the second portion of the gas flow distributor is located near the coal discharge from the coal drying zone to cool overheated coal particles.