COLLECTING METHOD OF CARBON DIOXIDE FROM SUPPLY STREAM

摘要

PURPOSE: A collecting method of carbon dioxide is provided to reduce the expenses with a sub-refrigerating of liquid CO2 for reducing the column exhaust loss using the CO2 cooling agent, collected into a freezer. CONSTITUTION: A collecting method of CO2 has the steps of:compressing an opening supply stream with a high pressure and refrigerating the compressed stream; delivering the compressed stream to a steam column; expanding the some of bottom material liquid CO2 having high purity to obtain the movement of refrigerated liquid CO2 cooling agent; condensing the CO2 from the exhaust gas through a heat-exchanger to the refrigerated liquid CO2 cooling agent and reflowing the condensed CO2 into the inside of the steam column.