Industry Focus : Incineration

Incinerator Applications

Waste gases extracted from an incinerator must be treated with a gas cleaning system to remove the particulate by-products, as well as neutralize all of the acid gases and remove hazardous air pollutants.

In many cases, a waste heat recovery boiler is installed after the incinerator (or secondary combustion chamber), where any precursors to Dioxins and Furans (D/F) combine due to optimum formation temperatures.

A proven solution is the installation of an Evaporative Cooling Tower or a Lime Spray Dryer downstream of the boiler to rapidly lower the exhaust gas temperature and reduce D/F formation, as well as remove any acid gases, as in the case of a spray dryer.

In the case of a cooling tower, Activated Carbon (A/C) is augmented by a Hydrated Lime injection system, installed upstream of a Fabric Filter in order to capture D/F, as well as any Heavy Metals (HM) present in the gases.

The fabric filter can be fitted with special membrane filtration bags (and in some cases coated with catalysts or A/C) that correspond to the operating conditions and therefore guarantee durability of the bags and a clean gas content of less than 10 mg/Nm3.

A wet gas scrubber often follows the particulate, D/F and Heavy Metals collection train to abate acid gases and to polish the exhaust gas stream to in order to meet local requirement.