The utility model discloses an adjustable ventilation device for a high-pressure boiler, which comprises the high-pressure boiler and an
aeration tank, the
aeration tank is mounted on the high-pressure boiler, and an adjustable ventilation structure is mounted on the
aeration tank and the high-pressure boiler; the adjustable ventilation structure comprises an angle bearing block, a tooth-mounted spraying
pipe, a drainage spraying
pipe, a side wall limiting
pipe, a rotary sleeve rod, a concave telescopic block, a convex telescopic block, a concave connecting block, a connecting telescopic shaft, a telescopic hydraulic push rod and an inflation
assembly. The utility model relates to the technical field of boilers, the inner side of a high-pressure boiler is inflated under
high pressure through an adjustable ventilation structure, and meanwhile, the
combustion angle is adjusted through high-pressure
airflow according to different requirements, so that
coal on the inner side of the high-pressure boiler is stably inflated, and the
combustion angle of the high-pressure boiler is adjusted according to different requirements. And rotating air flows with different frequencies and different angles are generated on the inner side of the boiler, so that the aim of inflating at different rotating angles according to different requirements is achieved.