Question: Use professional problem presentation, including the giver/find/assume/solution format, and use unit conversion tables. Given must state diagram and then list any process specifications provided in
Use professional problem presentation, including the giver/find/assume/solution format, and use unit conversion tables. Given must state "diagram" and then list any process specifications provided in the problem statement Find must list the variables on the diagram for which a solution is necessary. Assume must state the necessary assumptions to reduce the general balance equation to In-Out = 0. Solutions must include a degree of freedom analysis, equations for all material balances, physical constraints, and process specifications, and a clearly presented solution strategy. Problems 1. In a sugar beet processing plant, granulated sugar (such as is found on grocery store shelves) is produced by crystallizing and purifying a sugar syrup called thick juice. 1200 kg of thick juice, containing 62.0 wt.-% sugar (S), 1.8 wt.-% ash (A), and the remainder water (W) is fed to a batch crystallizer. A second feed of crystalline sugar with 0.5 wt.-% water is added to the crystallizer to seed crystal growth. The mass of sugar in this stream is equivalent to 1.5% of the mass of sugar in the thick juice. Within the crystallizer, the solution is concentrated by boiling off 8.1% of the total water in the thick juice stream as pure water. The crystal slurry is sent to a centrifuge, where all of the ash is removed, corresponding to 6.0 wt.-% of the liquid stream The majority of sugar leaves the centrifuge as wet crystals. The wet crystals are sent to a dryer, where hot, dry air is used to remove water from the wet crystals. Air exiting the dryer contains 2.0 wt.-% water, and dried crystals contain 0.5 w.-% water. 95% of the total sugar entering the crystallizer is recovered as dry crystals leaving the dryer. a. Draw and completely label the process flow diagram using standard notation. List all process specifications using the notation provided on the diagram b. Complete a degree of freedom analysis to determine the best solution strategy Determine the mass of granulated sugar produced, the amount of hot, dry air needed to dry the crystals, and the mass and composition of the liquid stream leaving the centrifuge
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