Answer / amal raj

anywhere position the pump no problem

Answer / gohil

Position of Pump - Generally at Ground Level. (Pump to meet
NPSH Requirement)
Position of Reflux Drum and Condenser depend on Type of
Pressure Control System used for column pressure control and
type of heat exchanger (condensor) i.e.partially or total
flooded.

Answer / kashif

I Have installed Reflux Pumps at 0.0mtrs Ground Level While
Reflux Pot is at 5.0 mtrs Level and condensors are at 13.5
mtrs Level ,its Working Satisfactory.
While in another case reflux Pot is at 5.0mtrs and
condensor is at 10.0mtrs and Reflux Pumps are at Ground
0.0mtrs Level. This column is used for Methanol
Distillation.

Answer / jayesh

It will depend upon height of distillation column

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Question 65 – A differential equation is given as y” + 5y’ + 6y = 0, y(0) = 2 and y’(0) = 3. By using Laplace transform, an engineer has correctly produced the equation L {y} = (2s + 13) / [(s + 2)(s + 3)] = A / (s + 2) + B (s + 3). (a) Find the values of A and B. (b) The inversed Laplace transform of 1 / (s + a) is given by exp (-at) where a is a constant. If the statement : L {y} = 9 L { exp (-2t) } - 7 L { exp (-3t) } is correct, find the equation of y as a function of t as a solution to the differential equation stated in the beginning of this question. When L {d} = 9 L {b} - 7 L {c}, then d = 9b - 7c with b, c and d are unknowns.

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1 Answers  

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