Edited by aliebrahem17, 07 July 2025 - 01:50 AM.
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Steam Used In Reboilers
#4
Posted 06 July 2025 - 02:58 AM
There are two separate considerations. These are the mechanical and heat transfer aspects.
From a mechanical point of view the high pressure steam may exceed the pressure and temperature rating of the exchanger. From a heat transfer point of view, putting the steam through a control valve can result in the steam becoming super heated and the heat transfer coefficients for sensible heat transfer are much lower than for condensation.
The fact that you have not destroyed your reboiler and the heat duty is being achieved indicates that things are OK, but particularly the mechanical considerations should be checked.
#9
Posted 08 July 2025 - 03:10 AM
Hi,
You need to convert LSS to LS using a desuperheater.
saturated steam offers better heat transfer coefficient .
Superheated steam - Atlas Copco Thailand
Breizh
Attached Files
#11
Posted 14 July 2025 - 10:27 PM
2- Lower process concentration on the reboiler outlet (quality)
3-Load increase on the downstream system and if recycling to primary process it will limit the system throughput
4- Energy consumption usually goes up if you have to further purify the reboiler outlet stream. There is a fine balance either you get restricted by system performance and lower the plant rates to compensate for poor heat transfer in your reboiler. Looking at big picture every system interacts with each other.
5- localized overheating can result in mechanical strain
6- lastly condensing steam provides density differential and if you loose that the flow circulation impedes and I am afraid things can get quite ugly process safety wise.
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