1 reply to this topic

[eastorca]

Hi friends,

After looking through PTS 31.22.05.12, I didn't find any crieteria to select appropriate design. It doesn't explain much about what criteria / in which case we select flooded weir design/overflow weir design.

Could you please give me some idea or reference. Thanks

Regards,

[Fr3dd]

Hello eastorca,

With a submerged weir configuration, the gas liquid interface level varies constantly through the vessel; with an overflow weir configuration, the gas liquid interface will remain constant upstream the weir. So, you have to determine some aspects as, for example:

1. Application of the separator: which stream is the more important for you here? your product is the gas, the light liquid (usually in crude applications) or the heavy phase (amine or sour water stripping applications)?

2. Which one is the continuous phase?. If you have more heavy liquid than light liquid, maybe an overflow weir is better.

3. Do you expect variations in the heavy phase or light phase flowrate?. A submerged weir gives you less margin to handle variations.

Always remember that both configurations require interface control, which is usually difficult. I hope this helps.

Regards,

Edited by Fr3dd, 05 December 2012 - 04:39 AM.