Want to dry the wet leather with 61% water to have moisture to 6% by weight by feeding into a continuous tunnel dryer if the mass flow rate of the leather bleach is 250 kg / h and enter dry air at 60 c, pressure 1 atm into the drying oven at 55 c, pressure 1 atm, relative humidity 50%. calculate.
1. the rate of feeding the bleach into the drying tunnel
2. volumetric flow rate of dry air inlet, m ^ 3 / h