METHOD AND APPARATUS FOR MICRO-HYDROCYCLONE PURIFICATION FOR FLUE GAS CARBON DIOXIDE CAPTURE SYSTEM

摘要

Provided are a method and an apparatus for micro-hydrocyclone purification for a flue gas carbon dioxide capture system. The method comprises: performing gas-liquid micro-hydrocyclone separation with ultralow pressure drop on scrubbed flue gas, to remove aerosol particulates entrained in the flue gas; performing gas-liquid micro-hydrocyclone separation with ultralow pressure drop on off-gas vented from the top of an absorption column, to remove entrained aerosol particulates; performing gas-liquid micro-hydrocyclone separation with ultralow pressure drop on cooled regeneration gas, to remove entrained aerosol particulates; and performing liquid-solid and liquid-liquid two-stage micro-hydrocyclone separation on a mixed amine solution lean for carbon dioxide discharged from a regeneration column, to remove entrained solid particulates and machine oil. The apparatus comprises: a water scrubbing column (1), rotational flow separators (2, 7, 12), liquid-solid micro-hydrocyclone separator sets (3-1, 3-2, 3-3, 8-1, 8-2, 8-3), a water scrubbing tank (4), a absorption column (6), a regeneration column (9), liquid-solid micro-hydrocyclones (15, 16) and liquid-liquid micro-hydrocyclones (17, 18).