DRYERS Devki Energy Consultancy Pvt. Ltd

۱ INTROUCTION ……………………………………………………………………………………………………………………………… 4
۱٫۱ BACKGROUND …………………………………………………………………………………………………………………………. 4
۲ FUNDAMENTALS OF DRYING……………………………………………………………………………………………………….. 5
۲٫۱ THE DRYING CURVE………………………………………………………………………………………………………………….. 5
۲٫۲ MOISTURE CONTENT …………………………………………………………………………………………………………………. 6
۲٫۳ ESTIMATION OF DRYING TIME……………………………………………………………………………………………………….. 6
۳ REVIEW OF MAJOR DRYER TYPES ………………………………………………………………………………………………. 8
۳٫۱ ROTARY DRYERS……………………………………………………………………………………………………………………… 8
۳٫۲ PNEUMATIC/FLASH DRYER …………………………………………………………………………………………………………. 9
۳٫۳ SPRAY DRYERS: …………………………………………………………………………………………………………………….. 11
۳٫۴ FLUIDISED BED DRYERS…………………………………………………………………………………………………………… 13
۳٫۵ HOT AIR DRYER- STENTER……………………………………………………………………………………………………….. 14
۳٫۶ CONTACT DRYING- STEAM CYLINDERS/CANS ………………………………………………………………………………… 14
۳٫۷ INFRA RED DRYING………………………………………………………………………………………………………………….. 15
۳٫۸ RADIO FREQUENCY DRYING:………………………………………………………………………………………………………. 17
۴ INDUSTRIAL NEEDS OF DRYING…………………………………………………………………………………………………. 18
۴٫۱ TEXTILE INDUSTRY………………………………………………………………………………………………………………….. 18
۴٫۲ PAPER & ALLIED PRODUCTS INDUSTRY………………………………………………………………………………………… 19
۴٫۳ CHEMICAL/PHARMACEUTICAL/FOOD/DAIRY INDUSTRY……………………………………………………………………… 23
۴٫۴ TEA INDUSTRY……………………………………………………………………………………………………………………….. 25
۵ ENERGY SAVING APPROACHES IN DRYERS………………………………………………………………………………. 26
۵٫۱ EVALUATION OF ENERGY EFFICIENCY AND DIAGNOSTICS ………………………………………………………………….. 26
۵٫۲ INCREASING THE TEMPERATURE DIFFERENTIAL………………………………………………………………………………. 27
۵٫۳ REDUCE MOISTURE LOADING…………………………………………………………………………………………………….. 27
۵٫۴ GOOD HOUSE KEEPING & MISCELLANEOUS MEASURES……………………………………………………………………. 28
۵٫۵ INSTRUMENTATION AND CONTROL ………………………………………………………………………………………………. 28
۵٫۶ TECHNICAL MODIFICATION / SELECTION OF DRYING METHOD ……………………………………………………………… 30
۵٫۷ USE THE EXHAUST AIR EFFECTIVELY. ………………………………………………………………………………………….. 30
۵٫۸ FINAL MOISTURE CONTENT SPECIFICATION. ………………………………………………………………………………….. 31
۶ CASE STUDIES…………………………………………………………………………………………………………………………… 32