One Fuller Plenum pulse collector (624 bags).
1. Low Airflow; 2. Low production rate; 3. Product loss through stack emissions; 4. Frequent bag change.
Conventional singed Nomex felt filter bags had an initial DP of 5", increasing to 14" within three months. The collector caused a production bottleneck. Stack emissions resulted in excessive product loss. Diffusers reduced operating DP, but not enough to give desired airflow and production rates.
GORE® membrane/Nomex® felt filter bags were installed, with modified inlet ducts (diffusers could not be removed because they were welded to the cages).
Airflow and product flow capability of collector now exceeds spray-dryer capacity. Emissions reduction (increase in product recovery) recovered the cost of the bags within 622 operating hours. The first set of bags provided two years of service prior to the Nomex felt backing wearing out against the cages.