in ac ryogenic plant, sles gas goes out of the top of demethanizer column goes through some Brazed aluminuim heat exchangers and one tube/shell heat exchanger before recompress by the brake compressor attched to turbo expander then send to sales gas compressor.
the size of the pipe is huge...
A plant with 4.0 BSCFD of moderate-rich ethane (about 8% c2)feed is to be designed to get maximum recovery of C2+(>80%)there are two feeds to the plant:
1. A gas that free of H2S & CO2 and has only 4 ib of water per MMSCF. Rate is 2.4 BSCFD
2. A gas that free of H2s and has 2% CO2 and also...