Wet Scrubbers for Emission Control - Mathematics and Statistics for the Environment - page 531

The parameter characterizing the liquid-to-gas ratio ( B ) can be calculated using Equation 18.8:

p
pC

l
gd

BLG = ( / ) (18.8)

where
B = Parameter characterizing liquid-to-gas (dimensionless).
L / G = Liquid-to-gas ratio (dimensionless).
p l = Liquid density (g/cm 3 ).
p g = Gas density (g/cm 3 ).
C D = Drag coefficient for the liquid at the throat entrance (dimensionless).

The inertial parameter at the throat entrance is calculated in Equation 18.9:

= ( 2
9µ

dv
d

p gt

K (18.9)

po

gd

where
K po = Inertial parameter at throat entrance (dimensionless).
d p = Particle aerodynamic resistance diameter (cm).
v gt = Gas velocity in the throat (cm/s).
µ g = Gas viscosity (g/s-cm).
d d = Droplet diameter (cm).

= (

) 2

dv
d

pg gt

K (18.10)

pg

9µ

gd

where
K pg = Inertial parameter for mass-median diameter (dimensionless).
d pg = Particle aerodynamic geometric mean diameter (cm).
v gt = Gas velocity in the throat (cm/s).
µ g = Gas viscosity (g/s-cm).
d d = Droplet diameter (cm).

The value for C D is calculated using Equation 18.11:

D =+

24

( )

06 .

C 022 . 1015 + . ( N ) (18.11)

Re o

N

Re o

where
C D = Drag coefficient for the liquid at the throat entrance (dimensionless).
N Re o = Reynolds number for the liquid droplet at the throat inlet (dimensionless).

The Reynolds number is determined in Equation 18.12:

vd
v

gt d

N

Re o =

(18.12)

g