Chemical Engineering Calc.
1. A material containing 75% water and 25% solid is fed to a granulator at a rate of 4000 kg/hr. The feed is premixed in the granulator with recycled product from a dryer which follows the granulator (to reduce the water concentration of the overall material in the granulator to 50% water. 50% solid). The product that leaves the dryer contains 16.7% water. In the dryer, air is passed over the solid being dried. The air entering the dryer contains 3% water by weight (mass) .and the air leaving the dryer contains 6% water by weight (mass).
a) What is the recycle ratio to the granulator?
b) What is the rate of air flow to the dryer?
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