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I checked the exit weir height, which has't been increased corresponding to the downcomer clearance. I think as long as the minimum static seal (typically 13 mm) is maintained downcomer clearance could be increased without any adverse effect on the tray efficiency. But, thank you for pointing...

Hi there, I am working on tray hydraulics for process water stripper in a steam cracker plant. One of the vendors for the column internals (valve trays) has come up with a design change to increase the downcomer clearance to a higher value 65 mm (instead of original value of 60 mm) to be...

For a given mass flow, higher the fluid density (say for a liquid) lower the pressure drop. On the other hand, lower the density of the fluid (a gas/vapor) higher the pressure drop. So pressure drop is inversely proportional to density.

If its a oil and gas installation, then degassing boot would be the right term. Its usually installed after the degasser and before a floating roof tank. regards,

Thanks Sshep, Appreciate your insightful reply. The available NPSH did improve when the operating pressure is set at 0.5 kg/cm2g with N2 padding. This will indeed help us to retain the auto-start function of the pump at high level in the sump incase the amine solution is being dumped at higher...

Sshep, Thanks for the suggestion. The amine sump has an operating pressure of 0.1 kg/cm2g. It is provided with a pressure controlled valve set to open to flare at higher set pressure (3.5 kg/cm2g).Are you suggesting to reset the pressure controller to 2.1 kg/cm2A to cancel out the effect of...

I have a question on amine sump pump design. This is a acid gas recovery unit with a typical absorber followed by regenerator configuration. If during an upset scenario or a regular maintenance operation, rich or lean amines have to be drained to a underground sump (that is connected to a...