Apparatus for mixing a fluid with a large gas stream, especially for introducing a reducing agent into a flue gas containing nitrogen oxides
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United States of America Patent
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Oct 11, 2011
Grant Date -
Dec 18, 2008
app pub date -
Dec 14, 2006
filing date -
Dec 15, 2005
priority date (Note) -
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Abstract
An apparatus for mixing a liquid with a large gas stream flowing in a gas duct, especially for introducing reducing agent into flue gas containing nitrogen oxides. At least one metering lance having at least two atomizer nozzles supplies liquid to the gas stream, with the nozzles being inclined relative to the direction of flow of the gas stream and being inclined in opposite directions relative to one another. At least one disk-shaped mixer element is associated with and spaced from the nozzles, and is inclined relative to the direction of flow of the gas stream. Flow eddies form at the mixer element, and at least a portion of the liquid enters the flow eddies. Atomization is effected in such a way by the mixer element that volatilized gaseous portions in the nozzle streams exiting the nozzles enter the flow eddies, while non-volatized droplet portions, due to their inertia and an atomizer angle, do not enter the flow eddies in the vicinity of the mixer element.
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