3 replies to this topic

[grtu]

Excuse my English

 

 

 

1 What is the limit of steam that I can inject into a column to be more efficient?

2 The top pressure affect when we work with a column with Stripping Steam?

 

Thanks

Edited by grtu, 17 February 2023 - 05:23 AM.

[Pilesar]

These are great questions to be resolved with steady state computer models using rigorous thermodynamics. You may be surprised at the understanding you will receive from building a computer simulation of your system. Seeing how the model behaves when varying input parameters provides much better learning than someone supplying the answer.

[Technical Bard]

The maximum stripping steam you can admit would be when the partial pressure of H₂O at the feed or reflux tray is too high and water condenses on the trays.  Since you don't want to get close to that, you want to have >15°C margin between the water dewpoint and the feed/reflux temperatures to avoid liquid water in the column. 

 

I'm not sure what you mean by the top pressure effect.  

[SilverShaded]

Typically there is a rapid decline in stripping effect as steam ratio is increased.  The optimium is when the cost of the steam outweighs the benefit of increased stripping.  The problem with most applications is knowing the value of the stream and frankly very few operators really know it.