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32 Lawrence K. Wang et al.

Fig. 14. “Acid” drew points in stack gases. (From US EPA.)

S = S + S + ... + S (33)
1
2
e,l-m e ,l-m e ,l-m en,l-m
6
S = S (10 /Q )(392 scf/lb-mol) (34)
e e,l-m e
where S is the SO content of the combined gas stream (lb-mol/min) and S is the
e,l-m 3 e
SO content of the combined gas stream (ppmv). Using the SO content (S ) and mois-
3 3 e
ture content (M ) for the combined gas stream, the acid dew point can be obtained by
e
entering these values in Fig. 14.
7.4. Particulate Matter Loading
Usually, the particulate matter is reported in grams per actual cubic feet (g/acf).
Outlined below are the procedures to convert the reported particulate matter in a gas
stream from g/acf to lb/h.
)(
W e1,l = W e g Q e a ( 60 min h lb 7,000 g) (35)
1
,
1
,
where W is the particulate loading for gas stream 1 (g/acf) and W is the particu-
e1,g e1,l
late loading for gas stream 1 (lb/h). This procedure is repeated for each gas stream and
the results in lb/h for each gas stream are summed as shown in Eq. (36):