Air duct structure of heat accumulating type oxidizing furnace

The invention discloses an air duct structure of a heat accumulating type oxidation furnace, which comprises a plurality of air chambers, the plurality of air chambers are respectively mounted at the bottom end of the heat accumulating furnace of an oxidation furnace body, the bottom end of each air chamber is connected with a stop valve, air outlets are formed in the two sides of each air chamber, and second air blocking blades for sealing the air outlets are rotatably connected to the air outlets. Blade frames are fixedly connected into the air chambers, ventilation openings are formed in the blade frames at intervals, first air blocking blades used for sealing the ventilation openings are rotationally connected into the air chambers, rotating shafts of the first air blocking blades and rotating shafts of the second air blocking blades extend out of the air chambers and are connected with driving structures, and air return branch pipes are arranged on the side faces of the bottom ends of the air chambers. A