The air injection system — sometimes called an air cannon or bin activator system — is a pneumatic flow aid for bulk material storage vessels, silos, and hoppers where material bridging, ratholing, or flow stoppages are a recurring problem. Stored bulk materials — particularly hygroscopic, cohesive, or poorly flowing powders — can form stable arches or channels within silos that prevent gravity discharge. Air injection breaks these formations and restores flow without mechanical intervention.

Air injection systems consist of a series of air cannons — compressed air vessels with fast-acting discharge valves — mounted at strategic points on the silo or hopper wall. A sequencing timer fires each cannon in turn, delivering a short, sharp air blast through a flush-mounted nozzle into the material mass, breaking any arch or bridge that has formed. The sequencing and timing are set to the material’s specific flow behaviour.

SaveEco engineers air injection systems as part of silo and hopper design for difficult materials — and retrofits them to existing silos where flow problems have been identified. Particularly important for fly ash silos, lime silos, and raw meal storage in cement plants.

Key Applications: Silo flow promotion · Hopper discharge aid · Fly ash storage · Lime storage · Cohesive powder handling

Materials: Fly ash · Lime · Raw meal · Hygroscopic powders · Cohesive fine materials