Page 192 - Air pollution and greenhouse gases from basic concepts to engineering applications for air emission control

6.4 Cyclone 167

Dirty air
Clean air Clean air Dirty
Dirty Dirty air air
air

Particles out
Particles out Particles out Clean air Clean air

(1) (2) (3) (4)
Fig. 6.7 Schematics of four types of cyclones (Source [42])

Our analysis continues with the mostly widely used cyclone model, involute
cyclone. An involute cyclone is a conventional reverse flow cyclone that has been
well standardized and commercialized. It can be classified into three types based on
the flow rate capacity and efficiency: conventional cyclone, high efficiency cyclone,
and high throughput cyclone.
For the widely used, so-called Lapple cyclones [19], design parameters are given
in Fig. 6.8 and Table 6.1 [21] with a typical gas inlet velocity in the range of 15–30 m/s
[4]. The values in Table 6.1 are for guidance only. Actual design may vary.

Fig. 6.8 Schematic diagram D e
of a Lapple cyclone
H
S
L b
W

D

L c

D d