Industrial Air Quality and Ventilation

219Engineering Solutions for Dust Release Containment and Air Dedusting

© 2010 Taylor & Francis Group, LLC

formation and prevents ow deformation at the aspiration ange inlet. All things

being equal, the negative pressure is more evenly distributed along the vertical walls

and reaches greater values than with single walls (Figure 5.5).

Negative pressure is the most uniform in double-walled cowls. Here, side walls

of the inner chamber disrupt the fan jet of injected air, considerably weakening the

direct impact of the incoming jet on the exterior walls.

5.1.2.2 Compressive Effect

As the falling particulate material hits the conveyor belt, air is ...