I am trying to design an upgrade project for a client. Please refer to the attached PFD. The existing compressor is 180 mmscfd and a new reciprocating compressor is going to be added. The discharge gas 240 mmscfd will be routed to 140mmscfd amine system and 100 mmscfd bypass. Right now I am planning to have two FIC for flow control respectively.
Below are my questions:
- The control scheme: there are flow control for the amine system (140 mmscfd), and another flow control on the bypass (100 mmscfd). Will this control scheme work well? Or is there a better option for flow control? The 140 mmscfd and 100 mmscfd bypass will operate at the same time.
- The anti-surge valve: the existing 180 mmscfd centrifugal compressor has an anti-surge valve PV-5. The new compressor will be reciprocating comp and a recycle valve is included in the compressor package already. Is it okay to keep the anti-surge valve in the common discharge header and I know This will reduce the availability of the two compressors. And does this work for centrifugal and reciprocating combination? For now I prefer dedicated recycle for each compressor. If the recycle line is dedicated from the discharge side, is it okay to send them back to one common separator in the suction side?
Thank you in advance for your help.
PFD.pdf 22.67KB 57 downloads