1 reply to this topic

[Yogesh_Bhintade]

We are in the process of replacing the old De-ethaniser column by the new one.

Before doing so we want the column to be completly dry.

My question is, can we dry the column using  Hot N2 , by Pressure purge method to the dew Point of -40 °C ?

Can anyone share the expereince

Thank you

 

 

[Zauberberg]

Theoretically yes, for which one would need an indefinite time. In reality, the column and the surrounding cryogenic system (I assume you are talking of a turbo-expander plant) are commonly dried to -5 degC. This applied for several NGL plants where I used to work.

 

The best thing is to discuss this subject with the engineering/EPC contractor, and to dig out the startup manual of the existing plant. The required dew point must be stated therein.