Batch Drying Essay Sample
The solution of the jobs are to be submitted as a squad study at the terminal of the period. Please include honor codification and the single part of each squad member. 1. A wet solid is dried from 36 % to 8 % wet in 5 hours under changeless drying conditions. The critical wet is 14 % and the equilibrium wet is 4 % . Calculate the clip needed: a ) To dry from 8 to 5. 5 % wet B ) To dry from 30 % to 15 % wet degree Celsius ) To dry from 36 % to 5. 5 % wet 2. A sheet stuff mensurating 0. 8 m square and 5 centimeter midst is dried from both sides from 20 % to 2 % wet under changeless drying conditions. The dry denseness of the stuff is 500 kg/m3 and its equilibrium wet is negligible. An experiment showed that the changeless drying rate is 4. 5 kg/m2-hr and the falling rate Begins at 25 % wet. How long is the drying clip. What is the % wet after 1 hr of drying?
3. Hot Air at 90oC and 40 % comparative humidness is used as heating medium in a tray desiccant in order to cut down the wet content of wet sand from 30 % to 5 % . Weight of dry sand is 5 kilogram and the tray dimensions are 20 centimeters by 60 centimeters by 3 centimeter. Critical wet is 15 % and equilibrium wet is 2. 5 % . What is the drying clip if the air flows parallel to the tray at a speed of 1. 5 m/sec? 4. Using the same information from Problem 3 of the illustrations. find the concluding % wet attained if the original moisture slab weighed 8 kilogram ( same dimensions ) and with 50 % wet is dried for 4 hours.
