Explosion-proof rotary airlock valve for chemical use. The upper and lower flange ports of the hydrated lime rotary feeder are generally square or circular, with A being square and B being circular, which can be selected by the user. The wear-resistant enclosed rotor vane star-type discharger features rotor blades with tips made of special wear-resistant material. This ensures good contact between the blade tips and the inner wall of the housing, and after wear, the blade tips can be easily adjusted to maintain good contact with the inner wall of the housing, providing better airlock performance. The high-temperature resistant discharger can handle materials with temperatures up to 280 degrees Celsius. The two end bearings are isolated from the impeller to prevent ultra-fine powder from coming into contact with the bearings.