DESULFURIZATION DEVICE

Even when exhaust gas has a high concentration of sulfur oxide, the cleaning capacity for an exhaust gas passage can be ensured by a desulfurization device (1) that comprises cleaning nozzles (22, 23, 41, 42) that inject cleaning liquid to clean the inner face of a passage (3) through which the exhaust gas passes, wherein: the cleaning nozzles (22, 23, 41, 42) have a nozzle body (31) that penetrates into the interior of the passage (3) by the tip thereof passing through a nozzle passage (3b) and that has an injection opening (31c, 31c') to inject the cleaning liquid, and an anchor unit (32) that supports the nozzle body (31), is disposed outside of the passage (3), and is anchored relative to the wall (3a) of the passage (3); the nozzle body (31) is constituted from a corrosion-resistant material; and the anchor unit (32) is constituted from a material different from the nozzle body (31).