| 摘要 |
<P>PROBLEM TO BE SOLVED: To carry out desulfurization and decarbonation for flue gas and reuse the treatment solution used for the treatment for treating flue gas. <P>SOLUTION: Gas-liquid contact reaction treatment H1, crystallization treatment H2, caustification treatment H3, and used treatment solution regeneration treatment H4 are successively carried out. The gas-liquid contact reaction treatment H1 is a treatment for desulfurizing and decarbonizing flue gas by bringing a purification treatment solution containing sodium hydroxide into contact with the flue gas; the crystallization treatment H2 is a treatment of producing precipitates in the treatment solution by adding a barium compound to the treatment solution containing sodium sulfate and sodium carbonate; the caustification treatment H3 is a treatment of removing the precipitates produced in the solution by the crystallization treatment H2 and thereafter producing precipitates in the treatment solution by adding calcium hydroxide; and the used treatment solution regeneration treatment H4 is a treatment for regenerating the used treatment solution from the caustification treatment H3 by removing the precipitate and using the regenerated solution as the purification treatment solution for the gas-liquid contact reaction treatment H1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
