Page 305 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Mechanical Separations 275

Table 4-12B
Partial List of Crossflow Microfilter Media in Chemical Service Applications

TABLE II I I .! 11 t ihq h
I ti J 11 II i II ii ii II

Chlorlnatecl orpnlc:a,
below 100'C
Eat .... below 100'C
Orpnlce 81 100 • 200'C
Orpnlcll 81 200 • IOO'C
nk:11 11 800 • 900'C

pH = 3 • 7, no chlorides
JIH = 7 • 10, no chlorldN
= O • 3 (except HF)
pH = 3 • 10, chlorldH preunt
HF,wlthpH < 3
pH=10·13
pH> 13
Concentrated acid•
&'teem(> 100'C)
Oxldanta (e.g., bleach)
By permission, Michaels, S. L. [38].

Table 4-13
I
Suggested Air-to-Cloth Ratios for Dust Removal from Air* ,------Ao. o. --,-SERVICE
H SPACE
Type of Dust Ratio I
-------- REQUIRED
Abrasives . 2-2.5
Asbestos . 2.5-3
Blast cleaning . 3-3.5
Carbon . 2-2.5
Cement (mills) . 1.5-2
Cement (conveying and packing) . 2-2.5
Clay . 2-2.5
Coal . 2-2.5
Feed - - ·, · · .. · · · · · · · · · · · 2.5-3
Graphite . 1.5-2 G
Grinders . 3-3.5
Gypsum . 2-2.5
Lampblack · .. 1.5-2
Limestone . 2-2.5
Rubber . 2-2.5
Salt _ 2.5-3
Sand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3.5
Silica Flour . 2-2 5
Soap _ . 2-2.5
Soapstone . 2-2.5
Talc · · ·, .. · · · · · · · · · · · · · · · · · 2-2.5
Wood Flour . 2-2.5
Ratio is the volume in cubic feet per minute of dust-laden air
to each square foot of active cloth area. If grain loading is
above normal, ratios must be reduced.
Figure 4-68. Typical blower intake filter-silencer. Air to blower leaves
*By permission, Bulletin 104 The W. W. Sly Mfg. Co .. Cleve- through pipe connection, which may be screwed or flanged. Cour-
land, Ohio tesy of Dollinger Corp.