1 reply to this topic

[sq3169]

Hi

I have been working on compressor package. And recently, while working on sizing and control, I have a number of doubts.

Firstly, is the vessel K value, the only factor determining the size of the scrubber? Does GPSA provide guides on sizing the pulsation bottles? Or Hysis be a better way to get the size?

The gas entering the system is dry, how do I determine the liquid accumulation rate? And set the level switches and alarm? What is the operational level?

Thanks

Cheers
sq3169

[Art Montemayor]

sq3169:

This may be your lucky post. I currently happen to be working on a project that is dependent on compressor Knock Out Drums (a.k.a. K.O. Drums, Inlet Separators, vapor/liquid separators, etc.) and I have had to prepare a simplified design worksheet that allows a quick design estimate on the size of the vessel(s). I’ll send you a copy if you show interest and submit all basic data and your email address.

Now, lets try to decipher your query.

1. You title your query as related to scrubbers; then you mention “pulsation bottles”. Just what is it that you are dealing with? The two are quite different and used for different purposes. Be specific and define exactly what you need to achieve.
2. The “K” value is the main parameter in sizing a vapor – liquid separator. It sets the diameter of the proper vessel. It does not fix the rest of the geometry; that is up to you and your requirements.
3. You are on the right track when you mention GPSA as a reference for designing a separator – especially if you are using the latest, electronic edition.
4. Are you serious when you ask how to determine the liquid accumulation for a dry gas? Maybe it’s too early in the morning for you or you have your thoughts on something else. I’ll let you think about that one. Perhaps you don’t need a “scrubber”. However, you may sorely need a pulsation dampener (or “bottle”).

Await your reply or further input on your problem or assignment. Don’t forget: if you starve us of basic data you’re not going to get any specific answers. The quality of the response is directly proportional to the quality of the basic data furnished and the question asked.