Identify the incorrect statement regarding the design features of a sieve plate column.

Pick out the wrong statement about the design of a sieve plate column ? - PakMcqs

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Subject: Process Equipment and Plant Designchemical-engineering › process-equipment-and-plant-design
Published: 3 Mar 2019
Last updated: 28 May 2026

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Raising the weir height enhances tray efficiency but increases the pressure drop across the plate; ideal weir heights are 40-90 mm for columns operating above atmospheric pressure and 6-12 mm for vacuum columns.In segmental downcomers, the chord length ranges from 60% to 80% of the column diameter, with the initial downcomer area typically set at 12% during design.The calming section width at the inlet and outlet of the tray is 75 mm for columns under 1.5 meters in diameter, and 100 mm for those with larger diameters.The minimum downcomer residence time recommended for separating entrained vapor is identical for both foaming and non-foaming liquids, approximately 20 seconds.

Explanation

Option D is incorrect because the minimum residence time in the downcomer for vapor disengagement differs between foaming and non-foaming liquids. Foaming liquids generally require longer residence times to ensure proper separation, unlike non-foaming liquids where shorter times suffice.

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Identify the incorrect statement regarding the design features of a sieve plate column.

Explanation

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