Reboiler With A Hot Oil Jacket

Hi,

 Oil Jacket.jpg   123.29KB   0 downloads

Unless the jacket contains a big enough gas volume the pressure in the jacket would become gigantic when the oil is heated and therefor the jacket will require a PSV to protect it, and relieve the expansion when necessary. You can avoid the PSV to open during normal operation by installing a sufficient big expansion bellow in the oil piping.

But I really don't understand why anybody would design such a complicated system to provide heat to the bottom of a column.

Change the design: delete the jacket and pump, and insert a suitable heating element directly in the column bottom liquid.

Hi,

To add to the other comments , a specification/operation sheet for thermal fluid (paratherm) where you can read the expansion volume ( about 10% for 100 c) . 

Additional volume must be considered to take account the expansion together with a PSV where the discharge should be routed to a safe location (catch pot) . 

Regarding the circulation pump  it should be a centrifugal pump , more robust /reliable than an air diaphragm pump .

my view

Breizh 

Edited by breizh, 08 April 2020 - 12:13 AM.

Gentlemen,

Thanks for your recommendations.

An option to use a heating element installed directly in the reboiler was checked in the past.The biggest problem is to find a electrical heating element which is certified for the hazardous area (Class 1 Div.1), the heating fluid is n-pentane. 

Thank you, Mike