Definitions for "Flue gas"
The gas vented from a boiler by the stack. Flue gas contains the waste gases from the combustion of a boiler's fuel.
The exhaust gases from a combustion facility in the stack that discharges them to the atmosphere. These gases often contain sulfur, which can be removed by a desulfurization scrubber, and particulates, which can be removed using specialized collectors like electrostatic precipitators, mechanical collectors (cyclones), fabric filters (baghouses), and wet scrubbers.