Download 30(Unit Operations)

Solids Handling Unit Operations
Section 2.7
The average cake saturation is given by:
2
2
2
2
sav = exp  −2.993 − 0.036z y + 0.055 z − 0.274 z − 0.756 zy − 0.099zy + 0.500y + 0.172 y 


(15)
where:
z=
t
hD
2

∆Pact 

1 3
y = ln 0.453K / 1 +

tρ 


L






(16-17)
For design calculations, an iterative method solution method is used, in combination with the equations given above, to calculate the filter diameter and
width required to produce a specified pressure drop.
102
PRO/II Note: For more information on using a rotary drum filter in PRO/II, see
Section 102, Rotary Drum Filter, of the PRO/II Keyword Input Manual.
References
II-156
Rotary Drum Filter
1.
Treybal, R. E., 1980, Mass-Transfer Operations, 3rd Ed., McGraw-Hill, N.Y.
2.
Dahlstrom, D.H., and Silverblatt, C.E., 1977, Solid/Liquid Separation
Equipment Scale Up, Uplands Press.
3.
Brownell, L.E., and Katz, D.I., 1947, Chem. Eng. Prog., 43(11), 601.
4.
Dombrowski, H.S., and Brownell, L.E., 1954, Ind. Eng. Chem., 46(6), 1207.
5.
Silverblatt, C.E., Risbud, H., and Tiller, F.M., 1974, Chem. Eng., 127,
Apr. 27.
May 1994