Determine Liquids Recovery Using Pipephase 1

[SuperG]

If I have the composition of a gas, how do I use Pipephase to determine how much propane I can recovery assuming a standard (or typical) cryo plant? What assumptions would I make?

Thanks for the help!

Gary

 

[Mrepp]

Gary,

I use pipephase to do multiphase pipeline flows. You need inlet pressure and temperature and a either a JT valve that lets pressure down or a compressor and cooler to condense. Specify inlet conditions and outlet pressure and use pipephase to solve for temperature and phase concentration.

 

[mirchee]

This problem cannot be solved properly without use of a full-fledged chemical process simulator, such as Hysys, PRO II, Aspen Plus, Chemcad, or PD Plus. Do you need to demethanize the gas? If so, there are innumerable tradeoffs between capital expenditure v/s operating cost for the compressor-turbine assembly, demethanizer operation, downstream fractionation to recover the natural gas liquid components, etc.

Seek out the best process simulation experts to help you navigate this area, as the thermodynamic and simulation issues are highly non-trivial, in my opinion.

 

[SuperG]

Thanks guys...I, too use Pipehase for multiflow pipelines, but in this case I was hoping to estimate the liquid recovery a cryo plant would see. Actually, I don't know enough about the plant, so I cannot realistically simulate the process.

I turned the question over to one of our process guys and he gave me an answer...thanks for help!

 

[Mrepp]

Super G-

What was the process guys answer? So it was a flash calc you were looking for to see what the liquids rate would be? If so I thought the valves in pipephase would work for your purpose of estimating.