Fresh graph juice contains 12.0 wt% solids and the balance water, and concentrated graph juice contains...
Fresh graph juice contains 12.0 wt% solids and the balance water, and concentrated graph juice contains 42.0 wt% solids. Initially a single evaporation process was used for the concentration, but volatile constituents of the juice escaped with the water, leaving the concentrate with a flat taste The current process overcomes this problem by bypassing the evaporator with a fraction of the fresh juice. The juice that enters the evaporator is concentrated to 58 wt% solids, and the evaporator product stream is mixed with the bypassed fresh juice to achieve the desired final concentration (42.0 wt% solid).
(a) Draw and label a flowchart of this process, neglecting the vaporization of everything in the juice but water (i.e., only water evaporates from the evaporator).
(b) Perform the D.O.F. analysis around bypass point of the feed stream, evaporator, the bypass- evaporator product mixing point and overall system. Based on your D.O.F. analysis, please identify the location of your flowchart where number of degree of freedom equals zero.
(c) Calculate the amount of product (42.0 wt% concentrate) produced per 100 kg fresh juice fed to the process and the fraction of the feed that bypasses the evaporator.
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Fresh graph juice contains 12.0 wt% solids and the balance water, and concentrated graph juice contains...
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Fresh orange juice contains 12.0 wt% solid and the water, and concentrated orange juice contain 42.0 wt% solids. Initially a single evaporation process was used for the concentration, but volatile constituents of the juice escaped with the water, leaving the concentrate with a flat taste. The current process overcomes this problem by bypassing the evaporator with a fraction of the fresh juice. The juice that enters the evaporator is concentrated to 58 wt% solids, and the evaporator product stream is...
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