Originally Posted by
Michael W. Clark
Julie,
You mentioned the "bowl" in the top of the full dust drum. Usually, this bowl is created by the vortex when it turns to head back up the middle of the cyclone. If this is the case, you could have been re-entraining material. More of a concern if you had filters downstream instead of exhausting outside. It effectively shortens the cone which reduces collection efficiency. The reduced efficiency would be most noticed on the smaller particles (once again may not affect you with discharging outside). Just wanted you to know in case you overfill the drum and notice material going outside.
Mike