Page 65 - Handbook of Energy Engineering Calculations
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FIGURE 3 Heat input to the economizer may be increased by the
addition of induct burners, by bypassing hot furnace gases into the gas
path ahead of the economizer, or by recirculation. (Power.)
FIGURE 4 Slagging combustors can be arranged to inject hot
combustion gases into gas passages ahead of economizer. (Power.)
To accommodate any of the changes shown in Fig. 3, a space from 12
