Shaft kiln sealing pneumatic system and shaft kiln overpressure feedback sealing device

The utility model relates to a sealing pneumatic system of a shaft kiln. The sealing pneumatic system comprises an air cylinder execution unit, an airflow adjusting unit, an air supply pipeline, an air supply unit and a silencing exhaust unit, the air supply pipeline supplies air to the air cylinder execution unit through the airflow adjusting unit. The air supply pipeline comprises a compressed air source, an air source filtering pressure reducing valve, an electric detection signal manual stop valve, an electromagnetic two-position two-way air inlet valve, a proportional valve pressure adjusting unit, a main pipeline throttling valve and a one-way valve which are sequentially connected. The air supply unit supplies air to the air supply pipeline, and the air supply pipeline is exhausted by the noise elimination exhaust unit. The shaft kiln overpressure feedback sealing device enables the single-action buffer cylinder to timely close the combined part of the rotary hopper and the fixed hopper of the feeding