46
F. Dong et al.
0.0025
0.0030
0.0035
0.0040
0.0045
0.0050
94
95
96
97
98
99
100
η
ΔP
L/G
η/ %
Dust mass concentration=12 g/m
3
G= 250 m
3
/h
300
320
340
360
380
400
420
440
460
ΔP/ Pa
Fig. 5 Effect of liquid–gas flow rate ratio on dust removal efficiency with different liquid velocity
0.003
0.004
0.005
0.006
0.007
0.008
96.5
97.0
97.5
98.0
98.5
99.0
99.5
η/ %
L/G
200
300
400
500
600
700
η
ΔP
Dust mass concentration=12 g/m
3
L=1.0887 m
3
/h
ΔP/ Pa
Fig. 6 Effect of liquid–gas volume ratio on dust removal efficiency with different gas velocity
is fixed at 250 m
3 /h and the L/G is around 0.003, the flow pattern changes to foam.
The mass transfer effect of the type is higher than that of other flow types, so the
increase in dust removal efficiency is relatively large, on the other hand, with a fixed
gas velocity, an increase in the L/G is equivalent to an increase in the L. The relative
velocity of the gas and the liquid droplet increases, and the gas–liquid contact surface
area also increases. The probability of the dust-containing gas flow colliding with the
liquid droplet increases, so the dust removal efficiency is also increased. However,
the G and dust content is constant, most of the dust particles have been captured by