Transcription of BEST PRACTICE MANUAL - DRYERS
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BEST PRACTICE MANUAL - DRYERS
BEST PRACTICE MANUAL DRYERS Prepared for Bureau of Energy Efficiency, (under Ministry of Power, Government of India) Hall , 2nd Floor, NBCC Tower, Bhikaji Cama Place, New Delhi 110066. Indian Renewable Energy Development Agency, Core 4A, East Court, 1st Floor, India Habitat Centre, Lodhi Road, New Delhi 110003. By Devki Energy Consultancy Pvt. Ltd., 405, Ivory Terrace, Dutt Road, Vadodara 390007, India. 2006 2 CONTENTS 1 INTROUCTION .. 4 4 2 FUNDAMENTALS OF 5 THE DRYING 5 MOISTURE 6 ESTIMATION OF DRYING 6 3 REVIEW OF MAJOR DRYER TYPES .. 8 ROTARY 8 PNEUMATIC/FLASH 9 SPRAY DRYERS : .. 11 FLUIDISED BED 13 HOT AIR DRYER- 14 CONTACT DRYING- STEAM 14 INFRA RED 15 RADIO FREQUENCY DRYING.
Latent heat of evaporation = 2257 kJ kg-1(at 100 °C so heat necessary to supply = 30 x 2257 = 6.8 x l0 4 kJ 2.3 Estimation of drying time The rate of drying is determined for a sample of substance by suspending it in a cabinet or duct, in a stream of air from a balance. The weight of the drying sample can then be measured
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