Sodium-calcium dual-alkali flue gas desulfurization gypsum oxidation system

The utility model relates to a sodium-calcium dual-alkali flue gas desulfurization gypsum oxidation system, which comprises a desulfurization tower with a tank body at the lower part, the side wall of the desulfurization tower is connected with a gas inlet smoke pipe, the tank body is connected with a sedimentation tank through a mixed regeneration tank, the bottom of the sedimentation tank is connected with an oxidation tank through a pipeline, and the oxidation tank is connected with the desulfurization tower through a pipeline. The side wall of the upper part of the oxidation tank is connected with a gas supply pipeline which is in bypass connection with the gas inlet smoke pipe, an oxidation pipeline penetrates into the tank body from the side wall of the oxidation tank, a gypsum discharge pipeline is arranged at the lower part of the oxidation tank, and the gypsum discharge pipeline is connected with a vacuum belt filter through a gypsum cyclone. According to the system, the loss of sodium hydroxide is r