SPOUTED BED TYPE REACTOR FOR DRY FLUE GAS DESULFURIZATION AND MULTI- STAGE DESULFURIZATION METHOD USING THEREOF

摘要

The present invention relates to a spouted bed type reactor for dry flue gas desulfurization and a multi-stage desulfurization method using the same. The present invention aims to provide a spouted bed type reactor for dry flue gas desulfurization and a multi-stage desulfurization method using the same in which a pressure difference between a front end and a rear end of a spouted bed type is lowered to raise a catalysis rate of sulfur oxide included in exhaust gas and a powder absorbent for desulfurization introduced into a reactor and concurrently to collect in multiple stages the sulfur oxide (Sox) and the powder absorbent according to a density difference in the reactor, and thus to collect and react in multiple stages the sulfur oxide (Sox) and the powder absorbent, thereby raising a desulfurization ratio. A spouted bed type reactor for dry flue gas desulfurization comprises: a gravity sedimentation box (1); a venturi unit (2) increasing the velocity of exhaust gas; a reactor body (3) including a conical fluidization unit (31) in which a powder absorbent for desulfurization flows to remove sulfur oxide, a fluidization unit (32) in which water, the exhaust gas and the powder absorbent injected in an upper direction, circulate to remove the sulfur oxide, and an absorbent recirculation cyclone (33) precipitating and collecting the powder absorbent that is not to be reacted included in the exhaust gas; a powder absorbent supply device (4) supplying the powder absorbent for desulfurization in the conical fluidization unit; a re-circulation powder absorbent supply device (5) re-supplying the powder absorbent that is not to be reacted for desulfurization to the conical fluidization unit; a water injection supply device (6) injecting compressed air and water upward; and a filter dust collector (7).