Heat storage oxidation utilization system and method for blending coal mine ventilation air methane with pulverized coal

The invention discloses a coal mine ventilation air methane mixed pulverized coal heat storage oxidation utilization system and method, and relates to the technical field of extremely low concentration gas oxidation utilization and coal mine energy conservation and emission reduction, and the system comprises a ventilation air methane gas conveying device, a pulverized coal conveying device, a heat storage oxidation device and an energy utilization device. By adding the high-quality pulverized coal, heat storage oxidation is stably operated, the minimum methane concentration and oxidation temperature for self-maintenance operation are reduced, and the utilization efficiency of ventilation air methane is greatly improved; meanwhile, the problem that coal mine ventilation air methane and low-concentration gas cannot be directly utilized is solved, the ventilation air methane is converted into heat energy to be used for power generation and heat supply, the utilization efficiency of the ventilation air methane c