Particles arrestment efficiencies

Figure 17.3 Particle arrestment efficiencies for different equipment...

Arrestance efficiency particle size rating rating Eilter type... 

Linty particles and sticky buffing compounds can cause trouble in high efficiency centrifugals and fabric arresters. Fire hazard is also often present. 

Stainless steel demister pads were installed after the IPAT in the path of the return gases to arrest the acidic mist particles, but these were not sufficiently efficient. 

Usmanova, R. R. Panov, A. K. Zaikov, G. E. Complex aerohydrodynamic research and the efficiency of arresting particles for barbotage - rotation, J. Balkan Tribologi. Asso.. 2006, 3, 368-373. 

The most commonly used inertial collector is the cyclone (Fig. 5.6). This consists of a cylindrical vessel into which the gas stream is introduced tangentially. The rotational motion of the gas stream causes movement of the particles to the outer wall where deposition and aggregation occur. The dust falls to the base of the cyclone and is removed into a hopper, whilst the cleaned gas stream is removed at the top. The main disadvantage of the cyclone, and of other inertial collectors, is the low efficiency at small particle sizes, and for this reason the cyclone is most commonly used to pre-clean an air stream which is subsequently polished using a more efficient dust arresting device. 

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