Exhaust-gas cleaning system with nitrogen oxide reduction...

Details Exhaust-gas cleaning system with nitrogen oxide reduction... Exhaust-gas cleaning system with nitrogen oxide reduction...

2005-11-29

2005-11-29

Tran, Hien (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

C422S172000

Reexamination Certificate

active

06969492

ABSTRACT:
An exhaust-gas cleaning system includes a nitrogen oxide reduction catalytic converter for reducing nitrogen oxides which are contained in the exhaust gas. A reducing agent is introduced into the exhaust-gas flow and is in the form of a vapor. A reducing-agent metering device for the metered addition of the reducing agent or a reducing-agent precursor to the exhaust-gas flow includes a vaporizer, which is arranged in the exhaust system upstream of the nitrogen oxide reduction catalytic converter. As a heat source, the vaporizer has (1) a heatable deflector surface, onto which the reducing agent, which is supplied by a feed unit, is directed under pressure; or (2) a microwave generator.

REFERENCES:
patent: 5628186 (1997-05-01), Schmelz
patent: 5881475 (1999-03-01), Hofmann et al.
patent: 6444177 (2002-09-01), Muller et al.
patent: 19510804 (1996-09-01), None
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patent: 0 615 777 (1997-08-01), None
patent: 0 555 746 (1997-09-01), None
patent: WO 97/01387 (1997-01-01), None
patent: WO 97/36676 (1997-10-01), None
German Search Report mailed Nov. 3, 2003.

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