Ammonia injection device for use in exhaust gas denitration syst

Details Ammonia injection device for use in exhaust gas denitration syst Ammonia injection device for use in exhaust gas denitration syst

1997-08-21

1999-12-07

Tran, Hien

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422172, 261118, B01D 5356, B01D 5390

Patent

active

059978228

ABSTRACT:
An ammonia injection device for use in an exhaust gas denitration system comprises ammonia injection pipe units arranged in a multiplicity of stages within an exhaust gas duct and each comprising a horizontal header pipe and a plurality of ammonia injection pipes extending downward from and connected to the header pipe and each having a multiplicity of injection nozzles. The header pipes other than the uppermost header pipe and a guide fixing member disposed horizontally at a bottom portion of the duct are each provided with a plurality of upward tubular guides arranged at a predetermined interval. The injection pipes have their lower ends inserted in the respective guides upwardly and downwardly movably. The injection nozzles have an opening diameter gradually increasing as the injection pipe extends downward.

REFERENCES:
patent: 5173093 (1992-12-01), Johnson et al.
patent: 5271873 (1993-12-01), Nelson et al.
patent: 5435976 (1995-07-01), Berner et al.
patent: 5543090 (1996-08-01), Morton et al.

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