Menetelmä typpioksidipäästöjen vähentämiseksi kuplivassa leijukerroskattilassa ja kupliva leijukerroskattila

The invention relates to a meth- od for reducing nitrogen oxide emissions in a bubbling fluidized bed boiler. The method comprises supplying nitrogen oxide reductant in the boiler furnace at a cer- tain injection level where the tempera- ture in the furnace is such as to enable the nitrogen oxide re...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Heikkilä, Jouko, Dernjatin, Pauli
Format:	Patent
Sprache:	fin ; swe
Schlagworte:	AIR AIR SUPPLY BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES DRAUGHT-INDUCING FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING MECHANICAL ENGINEERING METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN OPEN SINTERING OR LIKE APPARATUS OVENS RETORTS SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a meth- od for reducing nitrogen oxide emissions in a bubbling fluidized bed boiler. The method comprises supplying nitrogen oxide reductant in the boiler furnace at a cer- tain injection level where the tempera- ture in the furnace is such as to enable the nitrogen oxide reductant to reduce nitrogen oxide concentration in the flue gas. Combustion air for volatile matter is supplied into the first combustion zone (I) along with the fuel supply such that part of the combustion air for vola- tile matter is supplied as mixed with the fuel supply and part of the combustion air for volatile matter is supplied as surrounding at least part of the fuel supply. The velocity at which the combus- tion air for volatile matter is supplied is 10 to 25 m/s. The invention further relates to a bubbling fluidized bed and to ause thereof.