One of the common faults in the dense phase conveying of rotary feeders is the blockage of pipes due to low conveying speed and large conveying capacity. A set of positive blowing and reverse suction devices is installed at the starting end of each ash conveying main pipeline. When the pipeline is blocked, the third air valve is opened to pressurize the pipeline. When the pressure reaches the set value, the third air valve is closed and the anti blocking valve is opened. As the anti blocking pipeline is connected to the inlet pipeline of the dust collector, the blocking end will be subjected to high negative pressure reverse suction.

The air duct of the rotary feeder in the suction type pneumatic conveying equipment refers to the pipeline between the inlet of the fan after the dust collector and the air cap of the fan outlet. Generally speaking, the maintenance of these two parts of the pipeline is not large, but attention should be paid to the sealing condition of the joint of the air duct. It is necessary to pay attention to whether the air duct body is rusted and whether the damage of the air cap will cause rainwater tank to enter. The oil and water accumulated in the gas storage tank and the air-water separator should also be repaired in a timely manner and discharged in a timely manner.

The rotary feeder determines the ratio of material to air mixture, which means the influence of the specific gravity of the material and air during the material transportation process. It calculates the required amount of air to be conveyed by the pneumatic conveying system, calculates the diameter of the conveying pipeline, and determines the relevant specifications of the main component structure of the pneumatic conveying system. It also determines the number of horizontal distance, vertical height, inclination angle elbows, pipeline structure materials, and supports of the conveying pipeline.