In the production of sugar, sugarcane containing 16% sugar, 25% water, and the balance is pulp is fed to a mill where a syrup consisting of 13% sugar and 14% pulp is squeezed out, and the resulting “bagasse” contains 80% pulp. The syrup containing finely divided pieces of pulp is fed to a screen which removes all the pulp and produces a clear syrup containing 15% sugar and 85% water and a solid stream containing 95% pulp. The clear syrup is then fed to an evaporator producing “heavy” syrup which is 40% sugar and the crystallizer that follows produces a stream of pure water and 1000 lb/hr of sugar crystals. a. Find the water removed in the evaporator in lb/hr. b. Find the mass fractions of the components in the waste stream of the screen. c. Find the rate of feed cane to the unit in lb/h d. Of the sugar fed to the mill, what percentage is lost in the bagasse?
In the production of sugar, sugarcane containing 16% sugar, 25% water, and the balance is pulp is fed to a mill where a syrup consisting of 13% sugar and 14% pulp is squeezed out, and the resulting “bagasse” contains 80% pulp. The syrup containing finely divided pieces of pulp is fed to a screen which removes all the pulp and produces a clear syrup containing 15% sugar and 85% water and a solid stream containing 95% pulp. The clear syrup is then fed to an evaporator producing “heavy” syrup which is 40% sugar and the crystallizer that follows produces a stream of pure water and 1000 lb/hr of sugar crystals.
a. Find the water removed in the evaporator in lb/hr.
b. Find the mass fractions of the components in the waste stream of the screen.
c. Find the rate of feed cane to the unit in lb/h
d. Of the sugar fed to the mill, what percentage is lost in the bagasse?
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