At higher conveying velocities, the material particles can still be substantially in suspension, however, at the lower velocities, the material will be predominantly in contact with the conveying pipe and will move in waves or plugs. Typical air movement device for this type of conveying would be a Roots Blower/Exhauster.ĭense Phase: Dense phase, where conveying gas velocities are typically in the range 6-18 m/s and conveying pressures are above 1 barg. The material particles remain substantially suspended in the conveying gas stream and the concentration or solids loading ratio is relatively low. Medium Phase: Medium phase, where conveying gas velocities are typically in excess of 17-18 m/s and conveying pressure or vacuum is typically up to 0.35 barg.Typical air movement devices for this type of conveying would be a Fan or Side Channel Blower/Exhauster. Dilute phase conveying is ideal for materials with low bulk density and that is non-abrasive. The material particles remain wholly suspended in the conveying gas stream and the concentration or solids loading ratio (mass of solids/mass of gas) is relatively very low. Dilute phase: where conveying gas velocities are typically in excess of 17-18 m/s and conveying pressure or vacuum is low usually below 0.1 barg.Lean phase: Lean phase conveying is the most common conveying method for powders or granules and can generally be split into two further categories: Pneumatic conveying can be separated into two categories, lean phase and dense phase. What are the categories of pneumatic conveying? It is suitable for a range of process industries such as Food and Beverage, Pet Food, Chemicals and Detergents, Renewables and Specialist Materials. Pneumatic conveying provides a cost-effective way to handle and transfer powdered and bulk granular materials easily with very little loss. STOCKPORT - A pneumatic conveying system transfers dry bulk materials or powders through an enclosed conveying pipeline using pressure differential and gas flow (usually air), generated by an air movement device such as a fan, roots blower or compressor.
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