A rotary dryer using counter-current flow is to be used to dry 12000 kg/hr of wet...

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A rotary dryer using counter-current flow is to be used to dry 12000 kg/hr of wet salt containing 5% water (wet basis) to 0.1% water (wet basis). Heated air at 147°C with a WBT of 50°C is available. The specific heat of the salt is 0.21 kcal/kg °C. The outlet temperatures of air and salt are 72°C and 93°C respectively. Calculate the diameter of the dryer required. A rotary dryer using counter-current flow is to be used to dry 12000 kg/hr of wet salt containing 5% water (wet basis) to 0.1% water (wet basis). Heated air at 147°C with a WBT of 50°C is available. The specific heat of the salt is 0.21 kcal/kg °C. The outlet temperatures of air and salt are 72°C and 93°C respectively. Calculate the diameter of the dryer required.