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Unformatted text preview: F) to just exceed the flammability limit and avoid ignition of the propane-air mixture. Air can be assumed to con-tain 79 mol% N 2 and 21 mol% O 2 . The density of air or propane gas can be calculated from the ideal gas law. (b) As a part of the process of producing sugar crystals from sugar cane, raw sugar cane juice is sent to a series of three evaporators to remove water. the sugar cane juice, which is 85 wt% water, is fed to the first evaporator at 10,000 lb/h. Equal amounts of water are removed in each evaporator. The concentrated juice out of the last evaporator is 40 wt% water. Calculate: i. The flow rate of the concentrated juice out of the last evaporator. ii. The amount of water removed in each evaporator. iii. The concentration of water in the juice fed to the second evaporator. Evaporator 1 Water Evaporator 2 Water Evaporator 3 Water Raw cane juice Concentrated sugar juice 1...
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This note was uploaded on 04/05/2010 for the course CHEBE 241 taught by Professor Ali during the Spring '08 term at The University of British Columbia.
- Spring '08