Abstract: The present invention is generally directed toward an apparatus and method for the heating of an aqueous mixture to vaporization, more specifically toward the heating of dilution air through a dilution air heating coil that is placed within the path of exhaust gas. In a power plant utilizing an emissions reduction process, such as a selective catalytic reduction (SCR) process, or other type of process, to remove harmful components, such as nitrous oxide (NO.sub.x), from a stream of flue gas wherein the emission reduction process includes the injection of vaporized aqueous mixture into the stream of flue gas, the present invention comprises a dilution air heating coil being placed within the path of exhaust gas to heat dilution air that is then subsequently used in the vaporization of the ammonia.

Abstract: An apparatus for the distribution of cooling air having a cooling air distribution housing having an exterior wall, an interior wall, an inlet end and an outlet end defining a substantially circular passage therethrough, a cooling air providing assembly provides cooling air to the cooling air distribution housing and a plurality of cooling air distribution conduits before proving passage of the cooling air from the cooling air distribution housing into the substantially circular passage. Each of the plurality of cooling air distribution conduits having an inflow end and communication with the cooling air distribution housing and an outflow end extending into the substantially circular passage.