Page 111 - Fundamentals of Air Pollution

III. Stationary Sources 81

operation. Each of these lasts about 1/100 of a second from beginning
to end.
The emissions from combustion processes may be predicted to some
extent if the variables of the processes are completely defined. Figure 6-7
indicates how the emissions from a combustion source would be expected
to vary with the temperature of the reaction. No absolute values are shown,
as these will vary greatly with fuel type, independent variables of the
combustion process, etc.
A comparison of typical emissions from various common combustion
sources may be seen in Table 6-1.

III. STATIONARY SOURCES

Emissions from industrial processes are varied and often complex (4).
These emissions can be controlled by applying the best available technol-
ogy. The emissions may vary slightly from one facility to another, using
apparently similar equipment and processes, but in spite of this slight
variation, similar control technology is usually applied (5). For example, a

Fig. 6-7. Combustion emissions as a function of peak combustion temperatures.