The Electrospouted Bed

Strong localized dc electric fields affect the solids recirculation of semi-insulating particles in a draft-tube-equipped spouted bed. Experimental evidence i$ provided in the form of pressure/flow and solids recirculation rate data versus voltage. The electrode structure is placed near the inlet spout, where strong electric fields tend to freeze the particles in the lower part of the annulus, reducing their rate of entrainment into the central gas stream. The electrospouted bed (ESB) increases the flexibility of spouting as a process applicable in chemical reacting, drying, and coating technologies.