Pneumatic Conveying System

Pneumatic Conveying System is also named as airflow conveying system. It takes use of the airflow energy to deliver the granules along the airflow direction inside the closed pipeline. It is application of fluidization technology. It is divided into negative pressure conveying and positive pressure conveying. The negative conveying normally takes Roots vacuum pump as power source to vacuumize the materials tank into some vacuum state. Under the atmospheric pressure, two phases flow of material and gas forms at the air inlet, and they enter the cyclonic separator through the pipeline. The two phases flow inside the cyclonic separator under the action centrifugal force and gravity, separate most materials from the gas. And separated materials enter into the materials tanks, a small amount of material go into the dust collector together with the gas. Through the filtration bag, the powder is separated from the gas and recycled. And the gas will be discharged to the atmosphere. Positive pressure conveying takes Roots fan as power source. The air temperature at the fan out is lowered to room temperature when it passes through cooler, and the cooled air is stored in the air tanks. The materials enter to transportation pipeline from sending tanks. Due to the fixed-frequency opening and closing of solenoid valve, the compressed air forms pulse air flow(air knife). With the help of air knife, materials are distributed(the material is in plunger state in the pipeline). With static pressure difference before and back the plug, the materials are pushed forward. After the mixture of materials and air enter into the material tank with pulse type dust collector, the air and materials are separated, materials are stored while air is discharged.