Chemical Engineering :: Process Equipment and Plant Design
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Speed of industrial paddle agitator ranges from __________ rpm.
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__________ strain is measured using a 'strain rosetter'.
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Thin spherical shells subjected to internal pressure, develop __________ stresses.
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With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.
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With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will
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Spherical shaped pressure vessel is considered to be the most ideal, because it can
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An adequate clearance between the tray and the shell wall of a distillation column is provided to
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Overall tray efficiency of a distillation column is the ratio of the number of
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Pick out the wrong statement about the design of a sieve plate column.
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A.
An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns.
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B.
For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design.
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C.
Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns.
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D.
Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds.
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