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5 0 0 kg / h of seawater containing 3 . 5 0 wt % salt passes through a series of 1 0 evaporators. Roughly
kgh of seawater containing wt salt passes through a series of evaporators.
Roughly equal quantities of water are vaporized in each of the units and then condensed and
combined to obtain a product stream of fresh water. The brine salt solution leaving each
evaporator is fed to the next evaporator. The brine leaving the tenth evaporator contains
wt salt.
a Draw a flowchart of the process showing the first, fifth and tenth evaporators. Label all
the streams entering and leaving these three evaporators.
b Perform the degreeoffreedom analysis for the overall process and for the first five
evaporators together.
c Determine i the fractional yield of fresh water from the process kg HO recoveredkg
HO in the process feed and ii the weight percent of salt in the solution leaving the
fifth evaporato
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