Page 282 - Materials Chemistry, Second Edition

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Incineration of MSW 253

Steam
drum

Penthouse

Superheater

Boiler
bank Economizer

Furnace
Refuse
charging
hopper

Auxiliary
burners

Plunger ash
extractor

FIGURE 9.3 Boiler system used in a mass-burn incinerator (Gittinger, J.S. and Arvan, W.J., in steam: Its
Generation and Use, 1998. Reproduced with kind permission of Babcock & Wilcox, Inc.)

this energy including large shallow ponds and cooling towers. A cutaway drawing of a typical
cooling tower is shown in Figure 9.4.
After passage through the boiler area, the combustion gases are freed of particulates and
acid gases by a number of simple to sophisticated technologies, including electrostatic precipi-
tators, baghouses and mist separators (discussed below), and then discharged to the atmosphere
via the flue.