| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for recovering carbon dioxide efficiently recovering carbon dioxide from a raw material gas with a simple configuration. <P>SOLUTION: The method for recovering carbon dioxide includes: a pressure recovery step of recovering ordinary pressure in an adsorption tower 2A (2B, 2C); a pressure rising step of introducing a raw material gas into the adsorption tower 2A (2B, 2C) to achieve pressure rising; an adsorption step of introducing the raw material gas into the adsorption tower 2A (2B, 2C) and adsorbing carbon dioxide contained in the raw material gas on an adsorbent 3; a scrubbing step of releasing gases other than carbon dioxide from the adsorption tower 2A (2B, 2C); and a recovery step of releasing the carbon dioxide from the adsorbent 3 and leading it out from the adsorption tower 2A (2B, 2C), wherein offgas led out from the adsorption tower 2A (2B, 2C) at the scrubbing step is stored in an offgas storage part 42. The offgas stored in the offgas storage part 42 is used for recovering ordinary pressure. The carbon dioxide concentration of the raw material gas introduced into the adsorption tower 2A (2B, 2C) is regulated by mixing the offgas into the raw material gas. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
