A typical incinerator system contains basic elements: a feed system, a combustion chamber, an exhaust system, and a residue disposal system. Ancillary equipment includes shredders and a material sorter in the front end and air pollution control devices and a heat recovery device at the back end of the incinerator. Modern incinerators in the United States use continuous-feed systems and moving grates in primary combustion chambers which are lined with refractory material (heat-resistant silica-based material). Secondary combustion chambers burn the gas or solids not burned in the primary combustion chambers before discharging to the air pollution control devices.
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