Question 1: (13.0 points) A simplified flowsheet for the manufacture of sugar is shown below. Sugarcane...

  

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Question 1: (13.0 points) A simplified flowsheet for the manufacture of sugar is shown below. Sugarcane is fed to the mill, where a syrup is squeezed out, and the resulting "bagasse" contains 80% pulp. The syrup (E) containing finely divided pieces of pulp is fed to a screen which removes all the pulp and produces a clear syrup (H) containing 15% sugar and 85% water. The evaporator makes a "heavy" syrup and the crystallizer produces 1000 kg/hr of sugar crystals. Find the water removed in the evaporator, kg/hr. (1.0 points) Find the composition of the waste stream G. (1.0 points) Find the rate of sugar fed to the mill, kg/hr. (1.0 points) What percentage is recovered as dray sugar with respect to the sugar fed in the sugarcane. (1.0 points) Sugar is very sensitive to overheating in the evaporator due to caramelization and charring in worst cases. Suggest the best evaporator suitable for such process. Give reasons and then draw a simplified representation for the selected evaporator. (2.0 points) VI) What are the different methods you can suggest for the crystallization step? (2.0 points) VII) Based on you selected crystallization method, draw a simplified sketch of a continuous crystallizer suitable for sugar production. (2.0 points) VIII) Since sugar is lost in bagasse, you are asked to suggest a best engineering solution to recover as much sugar as you can from bagasse. Bagasse can be washed with water as a preliminary expectation. Draw a simple block flow diagram for the suggested expansion of the plant. This expansion is considered as a new separate expansion plant. (3.0 points) I) II) III) IV) V) F Cane Mill 16% Sugar 25% Water 59% Pulp E D Bogosse 80% Pulp 13% Sugar 14% Pulp Screen H 15% Sugar Solids G Contain 95% Pulp M Sugor, 1000 lb/hr Crystallizer K 40% Suger Evaporator L Water Water fond I Question 1: (13.0 points) A simplified flowsheet for the manufacture of sugar is shown below. Sugarcane is fed to the mill, where a syrup is squeezed out, and the resulting "bagasse" contains 80% pulp. The syrup (E) containing finely divided pieces of pulp is fed to a screen which removes all the pulp and produces a clear syrup (H) containing 15% sugar and 85% water. The evaporator makes a "heavy" syrup and the crystallizer produces 1000 kg/hr of sugar crystals. Find the water removed in the evaporator, kg/hr. (1.0 points) Find the composition of the waste stream G. (1.0 points) Find the rate of sugar fed to the mill, kg/hr. (1.0 points) What percentage is recovered as dray sugar with respect to the sugar fed in the sugarcane. (1.0 points) Sugar is very sensitive to overheating in the evaporator due to caramelization and charring in worst cases. Suggest the best evaporator suitable for such process. Give reasons and then draw a simplified representation for the selected evaporator. (2.0 points) VI) What are the different methods you can suggest for the crystallization step? (2.0 points) VII) Based on you selected crystallization method, draw a simplified sketch of a continuous crystallizer suitable for sugar production. (2.0 points) VIII) Since sugar is lost in bagasse, you are asked to suggest a best engineering solution to recover as much sugar as you can from bagasse. Bagasse can be washed with water as a preliminary expectation. Draw a simple block flow diagram for the suggested expansion of the plant. This expansion is considered as a new separate expansion plant. (3.0 points) I) II) III) IV) V) F Cane Mill 16% Sugar 25% Water 59% Pulp E D Bogosse 80% Pulp 13% Sugar 14% Pulp Screen H 15% Sugar Solids G Contain 95% Pulp M Sugor, 1000 lb/hr Crystallizer K 40% Suger Evaporator L Water Water fond I

Answer rating: 100% (QA)

F D E G H sugar F 016 3931805 3931805 1016461 2915344 E 013 1016461 1646091 H 015 1000 water F ... View the full answer