Carbon Black Main Process Collector (Tread-Grade)

Application

Tread-grade (high structure), wheelabrator-style reverse-air collector. Design conditions: airflow (into reactor) 520,000 scf/hr; air-to-cloth ratio 1.0:1 fpm gross, 1.2:1 fpm net, vena contracta velocity two fps (net), grain loading 40 gr/acf, inlet temperature 520°F, existing System.

Optimization Potential

Need to increase airflow through the reactor (to increase production); main process collector was the bottleneck. Could not afford downtime for construction of additional capacity. Limited by plant layout in terms of room for growth. High static pressure losses due to operation of the main process collector.

Solution

Install GORE® Membrane/Acid Resistant Fiberglass Fabric (9.8 oz) filter bags.

Results

Increased airflow over 20 percent, reduced pressure differential across collector by over 50 percent (with higher airflow). The filter bags gave more than two years of service.