THE STARTING SECTION OF PNEUMATIC CONVEYING

In the starting section of a pneumatic conveyor the material accelerates from the zero starting velocity to the velocity of the uniform conveyance section. In the case of thin flow conveying the pressure drop needed for material acceleration is of a considerable value compared with other pressure drops. In the case of short (15 to 25 m) conveying it forms the greatest part of additional pressure drops. Furthermore, in a vertical starting section the pressure drop needed to lift the weight of the material is higher than in the uniform velocity section