Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

Product Viscosity vs. Shear

Vertical Tank Selection

Low Flow in Pipes- posted in Ankur's blog

Started by A mukherjee, Dec 05 2010 01:27 PM

This topic has been archived. This means that you cannot reply to this topic.

1 reply to this topic

Share this topic:

Gold Member

Posted 05 December 2010 - 01:27 PM

Hi everyone,
Can anyone tell me what are the differences between downcomer backup flooding & downcomer choke flooding?

Junior Member

Posted 06 December 2010 - 01:23 AM

Hello Aditya,

Downcomer Backup flooding_Aerated liquid backed up into the downcomer because of increased tray pressure drop or liquid height. When this backup exceeds the tray spacing, liquid accumulates on the tray above, causing downcomer flooding. Can be checked either by increasing Tray spacing or Pressure drop
Downcomer Choke flooding is mainly function of downcomer geometry- DC top area / bubbling area. May occur when downcomer is not properly sized for vapor disengagement.

Check attached paper or you may refer ' Distillation Operations- by Henry .Z. Kister' for more details

Edited by csp_process, 06 December 2010 - 01:36 AM.

Downcomer Width Calculation Started by Guest_panoskagiou_* , 24 Aug 2019	Hot 14 replies 4,814 views	03 Sep 2023
Distillation Column Flooding Started by Guest_panagiotis_* , 20 May 2021	2 replies 1,200 views	05 Jun 2021
Answered Packed Column Flooding Point Started by Guest_jddavies96_* , 30 Oct 2019	2 replies 1,975 views	04 Nov 2019
Packed Column Flooding Point Started by Guest_jddavies96_* , 30 Oct 2019	1 reply 2,102 views	30 Oct 2019
Psv As Overpressure Protection Due To Flooding Started by Guest_Rodscott_* , 09 Oct 2015	6 replies 2,435 views	Guest_Bobby Strain_* 09 Oct 2015