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Distillation Column Internals


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#1 CHEMSTRONG

CHEMSTRONG

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Posted 13 May 2018 - 11:18 AM

I have configured detailed tray internals in steady state column/internals tab in Aspen hysys. but I am getting choke flood error for all trays that it exceeds 100 percent  choke flood. In my process flows, I have exceeded the flow of  reflux by 6 kg/hr to match top draw and bottom draw. due to this, I think this is happening., but how to eliminate that error without changing the top flows and reflux flows.



#2 Bobby Strain

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Posted 13 May 2018 - 02:23 PM

 

I would obtain a solution without tray details. Then rate the trays with one of the vendor programs.

 

Bobby

 



#3 August

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Posted 14 May 2018 - 08:09 AM

The tray design should be based on the vapor and liquid load. 



#4 winchester427

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Posted 10 June 2018 - 02:42 PM

Is the tray rating utility in HYSYS actually representative of your trays? My plant has a bespoke tray design that cannot be covered by these simple utilities. I utilize the Kister & Haas flooding correlations in a spreadsheet function in lieu. 






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