The fluid bed dryer is a cornerstone thermal processing equipment for powders, crystals, and granular materials, delivering efficient moisture removal for pharmaceuticals, food, fertilizers, and mineral products. It covers diverse application scenarios with multiple tailored models: lab-scale units (batch size 2–20 kg) suitable for R&D trials and small-batch material testing, with an inlet air temperature range of ambient +15°C to 200°C; horizontal vibrating fluid bed dryers (fluidized bed area 0.9–14.4 m²) for irregular or fragile particles like cereal grains and mineral slag, operating at 70–140°C inlet air temperature; and industrial closed-loop systems (capacity up to 50 tons/hr) for large-scale processing of biosolids and chemical bulk goods. Featuring a perforated distributor plate for uniform air distribution, it achieves high heat transfer efficiency, with heat input generally less than 1,250 Btu/lb of water evaporated. Constructed with 316L stainless steel or specialty alloys, it meets GMP, FDA, and EPA 503 standards, handling materials from heat-sensitive pharmaceutical granules to abrasive mineral powders.