Waste Energy: Powder Explosion Suppression Venting Isolation Silos Filters Elevators Mills Pipelines

As the wet mix sludge starts moving down the Drum Dryer to the discharge screw, it becomes dryer but also potentially more unstable. If the product is thermally unsafe it is discharged to a safe bin outside or cooled in a series of cooling screws before being lifted to the Sifter for grading into different sizes.  This is where the risk is at its highest. Protection should be  chemical barriers along the screws with venting either to a safe area outside or if that not’s possible, flameless venting inside the building. Good house keeping is important as sludge pellets are a fuel source and dispersion of the dust layers is to be avoided.