Power plants – Combustion products used as motive fluid – With exhaust treatment
Patent
1992-09-01
1994-02-01
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
With exhaust treatment
60 39182, F02C 708
Patent
active
052823555
ABSTRACT:
An improved exhaust gas NO.sub.x removal system removes NO.sub.x from exhaust gas through a catalytic reduction process making use of ammonia or its precursor as a reducing agent. The system includes a vaporizer in which ammonia or its precursor is vaporized, and one or a plurality of nozzles provided in a flue upstream of an NO.sub.x removal catalyst layer. The number of nozzles corresponds to a cross-sectional area of the same flue. These nozzles eject the ammonia or its precursor, vaporized by superheated steam within the vaporizer, into the flue. The superheated steam to be used in the vaporizer for evaporating ammonia or its precursor can be taken from the exhaust gas boiler itself in which NO.sub.x removal is to be effected.
REFERENCES:
patent: 4160805 (1979-07-01), Inaba et al.
patent: 4466241 (1984-08-01), Inui et al.
Bertsch Richard A.
Mitsubishi Jukogyo Kabushiki Kaisha
Wicker W. J.
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