Exhaust pipeline

The utility model discloses an exhaust pipeline, which belongs to the technical field of pipeline equipment and comprises a pipeline, a first filter device, a first rotating device, a second filter device and a second rotating device are arranged in the pipeline, the pipeline is provided with a third groove penetrating through the pipeline, an ash receiving hopper is arranged below the third groove, a motor is arranged in the ash receiving hopper, and a gear is mounted at the output end of the motor. The first filtering device comprises a first frame and a first filtering net detachably installed in the first frame, the second filtering device comprises a second frame and a second filtering net detachably installed in the second frame, and the first rotating device and the second rotating device are both meshed with the gear. The rotating device rotates to drive the filtering device, so that friction is generated between the filtering nets when the filtering nets rotate in opposite directions, dirt such as pa