FT-type ceramic spray tower induced draft fan: it is mainly used for exhausting the wet and waste flue gas of ceramic spray drying tower, and is suitable for various types of ceramic spray drying towers of PD1500-PD5000, and the selected conveying medium is air of high humidity. Medium temperature ≤ 200 ℃. Dust removal device with dust removal efficiency not less than 85% shall be installed before the fan.