Module for treatment of carbon dioxide and treatment method thereof

摘要

Liquid carbon dioxide separated from sour gas is expanded by throttling decompression and is gas-liquid separated at a low temperature so as to be supplied for shipping or the improvement of petroleum recovery. Methane generated from a stranded gas well is allowed to pass as a coolant through liquid carbon dioxide separated and discharged from sour gas generated from the stranded gas well so as to cool liquid carbon dioxide. Disclosed is a module for treating carbon dioxide, and a treatment method thereof for supplying liquid carbon dioxide at a proper temperature and state conditions when there is a need for liquid carbon dioxide of very low temperature for the storage or collection of carbon dioxide, the improvement of petroleum recovery, or the like by cooling carbon dioxide using a material separated from sour gas of a stranded gas well as a coolant.

主权项

1. A system for separating liquefied carbon dioxide, the system comprising:
a separation unit comprising a controlled freezing zone (CFZ) and configured to process sour gas and to discharge methane upwards and a CO2-containing composition downwards; an expansion valve configured to cool the CO2-containing composition from the separation unit by expansion; a heat exchanger configured to further cool the CO2-containing composition from the expansion valve by heat-exchanging with the methane from the separation unit; and a gas-liquid separator configured to receive the CO2-containing composition from the heat exchanger and to separate a CO2-enriched liquid composition therefrom for loading to a transportation vehicle.