The wet feed material to a continuous dryer contains 50 wt

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Reference no: EM13625016

The wet feed material to a continuous dryer contains 50 wt% water on a wet basis and is dried to 27 wt% by countercurrent air flow. The dried product leaves at the rate of 907.2kg/h. Fresh air to the system is at 25.6 degrees C and has a humidity of H=.007kg H2O/kg dry air. The moist air leaves the dryer at 37.8 degrees C and H=.02 and part of it is recirculated and mixed with the fresh air before entering a heater. The heated mixed air enters the dryer at 65.6 degrees C and H=.01. The solid enters at 26.7 degrees C and leaves at 26.7 degrees C. Calculate the fresh- air flow, the percent air leaving the dryer that is recycled, the heat added in the heater, and the heat loss from the dryer.

Reference no: EM13625016

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