Combustion in incinerators occurs under controlled conditions within the stack. Incinerators are not affected by wind or other weather conditions, and they generally provide more efficient combustion, compared to open-air flaring.
Although some incinerators are actually enclosed flares, a true incinerator has controls to maintain a specific air-to-fuel ratio, a refractory lining and a minimum residence time, while an enclosed flare is merely protected from outside weather. The most efficient combustion is provided by a true incinerator. Tipycal applications: waste gas and liquids, synthesis gas or tail gas.