Page 90 - Air Pollution Control Engineering

02_chap_wang.qxd 05/05/2004 12:40 pm Page 70
70 Lawrence K. Wang et al.

Table 4
Air-to-Cloth Ratios
Shaker/woven
Dust Reverse-air/woven Pulse jet/felt
Alumina 2.5 8
Asbestos 3.0 10
Bauxite 2.5 8
Carbon black 1.5 5
Coal 2.5 8
Cocoa, chocolate 2.5 12
Clay 2.5 9
Cement 2.0 8
Cosmetics 1.5 10
Enamel frit 2.5 9
Feeds, grain 3.5 14
Feldspar 2.2 9
Fertilizer 3.0 8
Flour 3.0 12
Fly ash 2.5 5
Graphite 2.0 5
Gypsum 2.0 10
Iron ore 3.0 11
Iron oxide 2.5 7
Iron sulfate 2.0 6
Lead oxide 2.0 6
Leather dust 3.5 12
Lime 2.5 10
Limestone 2.7 8
Mica 2.7 9
Paint pigments 2.5 7
Paper 3.5 10
Plastics 2.5 7
Quartz 2.8 9
Rock dust 3.0 9
Sand 2.5 10
Sawdust (wood) 3.5 12
Silica 2.5 7
Slate 3.5 12
Soap detergents 2.0 5
Spices 2.7 10
Starch 3.0 8
Sugar 2.0 7
Talc 2.5 10
Tobacco 3.5 13
Zinc oxide 2.0 5
Note: Generally safe design values — application requires consideration of particle size and grain loading.
2
3
A/C ratio units are (ft /min)/(ft of cloth area).
Source: ref. 8.