TWO CO2 COMPRESSION DEHYDRATION SYSTEMS FOR SALE

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TWO CO2 COMPRESSIONDEHYDRATION SYSTEMS FOR SALE

The purpose of the CO2 compression system is to prepare the CO2 for delivery to an off-taker for EOR use. The CO2 is liberated from the AGR semi-lean solvent loop at two pressure levels approximately 50 psig and 5 psig. The two streams flow into a multi-stage CO2 compressor (CO1080) after passing through knockout drums (DR1078 and DR1079) to remove any residual droplets of solvent. The LP CO2 enters the first stage of the compressor and proceeds through two stages of compression with subsequent intercooling. Prior to the third stage, the LP stream is combined with the MP CO2. The gas is then compressed via two additional stages and with associated intercooling.

Following the fourth stage, the entire gas stream exits the compressor and passes through a dehydration unit (PG1080) and the CO2 mercury adsorber (RX1080). These additional steps are necessary to meet the purity requirements of the off-taker. The CO2 stream returns to the CO2 compressor where the gas is compressed into the dense phase to the final off-take pressure 2,150 psig. Following the compressor, the CO2 is cooled to the off-take temperature 100 °F in the compressor aftercooler (HX1085). Finally the CO2 streams from each gasifier train are combined and delivered to the pipeline.

The CO2 compressor is an eight-stage, integral-gear compressor with a synchronous motor drive. The machine is controlled by three sets of adjustable inlet guide vanes. It is further protected from the effects of surge by three separate recirculation loops. A dynamic simulation study was performed on the CO2 compressor to confirm its operability and safety design and it is recommend for future complex compression systems.

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