Pneumatic conveying is used in many industries to move powders, granules and other bulk materials through pipelines. Instead of belts or mechanical equipment, these systems use airflow to carry materials from one point to another. This makes handling cleaner and often more efficient.
Positive Pressure Conveying
A positive pressure system uses a blower or compressor to create pressure in the system and blow air into the system. The forced air carries the material to the required location. Forced air systems are often used where material needs to be transported over long distances or where there are multiple discharge points. Positive pressure is generally the preferred choice for high material flows, particularly with larger quantities of powders and pellets.
Negative Pressure Conveying
In negative pressure systems, the material is moved in a direction opposite to that of the air flow. Instead of using compressed air to force the material through the pipe, the material is drawn through the pipe using a vacuum. In this way, the material is drawn towards the collection vessel. Negative pressure systems are often used in areas where cleanliness is an issue and dust control is required.
For the purpose of learning more about pneumatic conveying, consider connecting with a specialist such as www.aptech.uk.com/pneumatic-conveying-systems.
Factors to Consider When Choosing
Several factors determine the most suitable pneumatic conveying arrangement. Distance between processing stages is often the first consideration since positive pressure systems usually handle longer routes more efficiently. Material properties also influence the decision. Fragile or lightweight powders may move more gently under vacuum conditions.
