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43 FR 51393, Nov. 3, 1978, unless otherwise noted.
68 FR 57539, Oct. 3, 2003, unless otherwise noted.
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An air curtain incinerator operates by forcefully projecting a curtain of air across an open chamber or open pit in which combustion occurs. Incinerators of this type can be constructed above or below ground and with or without refractory walls and floor. (Air curtain incinerators are different from conventional combustion devices which typically have enclosed fireboxes and controlled air technology such as mass burn, modular, and fluidized bed combustors.)