Method for introducing a treatment medium into the waste gas flow in combustion processes
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United States of America Patent
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Nov 9, 1993
Grant Date -
N/A
app pub date -
Oct 19, 1990
filing date -
Oct 24, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The method for introducing a treatment medium into the waste gas flow in combustion processes provides that a carrier medium be mixed with a treatment medium, wherein these media are brought to a pressure level necessary for the atomization in a one-component nozzle prior to mixing. The quantitative proportion of treatment medium to carrier medium, which is adjustable as desired, is adjusted as a function of the NO.sub.x gas concentration in the treated gas flow or as a function of the waste gas quantity. The atomization pressure is either predetermined as a fixed value corresponding to the nozzle configuration or adjusted as a function of the waste gas quantity. The atomization pressure can also possibly be regulated as a function of the evaporator load. Water serves as carrier medium, while ammonia, sal ammoniac, urea or calcium cyanamide is used as treatment medium.
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