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QUESTION 2 : PUMP SELECTION AND SIZING 2 5 MARKS Crude dichlorobenzene is pumped from a storage tank to a distillation column. The tank is
QUESTION : PUMP SELECTION AND SIZING
MARKS
Crude dichlorobenzene is pumped from a storage tank to a distillation column. The tank is blanketed with nitrogen and the pressure above the liquid surface is held constant at bar gauge pressure. The minimum depth of liquid in the tank is The distillation column operates at a pressure of of mercury, absolute The feed point to the column is above the base of the tank. The tank and column are connected by a internal diameter commercial steel pipe, long. The pipe run from the tank to the column contains the following valves and fittings: standard elbows; two gate valves to isolate the pump operated fully open; an orifice plate and a flowcontrol valve. If the maximum flowrate required is calculate the pump motor rating power needed. Take the pump efficiency as per cent and allow for a pressure drop of bar across the control valve and a loss of velocity heads across the orifice. Density of the dichlorobenzene viscosity
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