Question
A hydrocarbon mixture at 70C is being pumped from a 1 atmosphere absolute pressure tank to a distillation tower at a feed rate of 200
A hydrocarbon mixture at 70C is being pumped from a 1 atmosphere absolute pressure tank to a distillation tower at a feed rate of 200 gpm. The feed density is 46.8 lbm/ft3, and its vapor pressure is 8.45 psia. The velocity in the inlet line to the pump is 3 ft/s, and the friction loss between the tank and the pump is 3.5 ft of fluid. The net positive suction head required is 6 ft. A) How far below the liquid level in the tank must the pump concentrate to obtain the required (NSPH)R? B) If the feed is at boiling point, calculate the position of the pump to avoid cavitation.
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