|
Reflux Condenser Without Accumulator?
#1
Posted 29 October 2014 - 09:35 PM
My question is, have any of you encountered this design? Did it work well? I anticipate control issues due to size limitations of the hot-wells. One other point...reflux ratios are fairly small for both towers: ~1 - 2.
Thanks in advance for any help
#2
Posted 30 October 2014 - 05:26 AM
If you are absolutely sure that there will always (also during start-up) be only one liquid phase present, then you can simply have a boot on the condensor, like proposed by Graham. You then need to specify to Graham what hold-up time (hold-up volume) you want in that boot, depending the control systems, on whether the reflux is pumped or flows back on gravity, and on the destination of the pumped distillate product (storage, or another column, or a reactor).
If you can have two liquid phases (two immiscible hydrocarbon liquids, or one hydrocarbon and water), even if that is only at start-up or during an upset, then it may be too complicated to accomodate proper liquid phases separation in just a boot.
If have seen condensors with boots as compressor interstage and aftercoolers where a small amount of condensed liquid has to be separated from the vapor.
Also steam turbines with vacuum condensors at outlet use a hotwell instead of a separate vessel.
#3
Posted 30 October 2014 - 07:55 PM
Jamie G,
Yes, the boot is a feasible design.
The key consideration is the amount of condensate.
The boot should provide sufficient hold-up volume for the chosen control system.
For example, you may consider 5-10 minutes of hold-up time in case of reflux/top product pump trouble.
Translate the required time to volume (diameter and length) and you will see if your boot size is suitable for your condenser dimension or not.
Good luck.
xavio
#4
Posted 31 October 2014 - 03:55 AM
Similar Topics
Steam AccumulatorStarted by Guest_Valeriacortez11_* , 15 Apr 2024 |
|
|
||
How To Select Reboiler And Condenser Operating Pressures For A Mdea ReStarted by Guest_Alexis Azamar_* , 27 Mar 2024 |
|
|
||
Types Of Reboiler And CondenserStarted by Guest_refluxraider_* , 17 Mar 2024 |
|
|
||
Determining Operating Pressure For A Column Without CondenserStarted by Guest_phoroogh_* , 03 Feb 2024 |
|
|
||
Air-Cooled Condenser Symmetrical Inlet-OutletStarted by Guest_tdeb_* , 06 Nov 2023 |
|
|