Methanol is to be used as an entrainer in an azeotropic fractionator. Liquid ethanol is pumped from a storage tank on ground floor to a reactor on level 2 at height Z2 using a centrifugal pump. The lowest liquid level in the tank is not allowed to go below the height of Z1. Line segment L1 from the tank to the pump is a 3½ inch schedule 40 commercial steel, and is 20 m long from the tank outlet to the pump inlet. This line segment has 3 × 90° standard long elbows and 1 × globe valve that is fully open. Line segment L2 from the pump outlet to the fractionator inlet is also a 3½ inch schedule 40 commercial steel, and is 90 m long. The Segment L1 has 5 × 90° standard long elbows and 2 × globe valve that is fully open, 4 × gate valves (2 × fully open, 2 × ½ open). The tank and fractionator are both at atmospheric pressure. The flowrate of methanol is 24 tonnes/hr. Estimate the power required by the pump.
Methanol is to be used as an entrainer in an azeotropic fractionator. Liquid ethanol is pumped from a storage tank on
ground floor to a reactor on level 2 at height Z2 using a centrifugal pump. The lowest liquid level in the tank is not
allowed to go below the height of Z1. Line segment L1 from the tank to the pump is a 3½ inch schedule 40 commercial
steel, and is 20 m long from the tank outlet to the pump inlet. This line segment has 3 × 90° standard long elbows and
1 × globe valve that is fully open. Line segment L2 from the pump outlet to the fractionator inlet is also a 3½ inch
schedule 40 commercial steel, and is 90 m long. The Segment L1 has 5 × 90° standard long elbows and 2 × globe valve
that is fully open, 4 × gate valves (2 × fully open, 2 × ½ open). The tank and fractionator are both at atmospheric
pressure. The flowrate of methanol is 24 tonnes/hr. Estimate the power required by the pump.
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