FLUID BED DRYER

PROBLEM TO BE SOLVED: To provide a fluid bed dryer capable of downsizing the device while maintaining dehydration functions.SOLUTION: The fluid bed dryer comprises: a hollow shape drying container; a wet fuel charge part for inputting wet fuel on one end side of the drying container; a dry matter discharge part for discharging dry matter, made from the heated and dried wet fuel, from the other end side of the drying container; a fluidization gas supply part for supplying fluidization gas to a lower portion of the drying container so as to form a fluid bed together with the wet fuel; a gas discharge part for discharging the fluidization gas and generated steam from an upper portion of the drying container; and a heat exchanger tube arranged on the fluid bed, in which in the heat exchanger tube, a plurality of straight parts are arranged in a horizontal direction and a vertical direction in a row, such that the interval between adjacent straight parts in the vertical direction upper end part is narrower than the interval between adjacent straight parts in the vertical direction lower end part.