PULVERIZED COAL-FIRED BOILER AND PULVERIZED COAL COMBUSTION METHOD

PULVERIZED COAL-FIRED BOILER AND PULVERIZED COAL COMBUSTION METHOD

A pulverized coal-fired boiler which can reduce both NOx and CO by supplying air efficiently to the central portion of a furnace and to the vicinity of the furnace wall thereby accelerating mixing with combustion gas. A main after air port is arranged to jet air with a momentum large enough for the...

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Bibliographische Detailangaben
Hauptverfasser: BABA AKIRA, ORII AKIHITO, TSUDA SHINJI, ORITA HISAYUKI, NOMURA SHINICHIROU, TADAKUMA SATOSHI, OKAZAKI HIROFUMI, YOSHIZAKO HIDEHISA, YANO TAKANORI, KAMIKAWA YUKI, OOYATSU NORIYUKI, SHIMOHIRA KATSUMI, KANEMOTO HIROAKI, KURAMASHI KOUJI, MINE TOSHIHIKO, TANIGUCHI MASAYUKI, KOBAYASHI HIRONOBU
Format: Patent
Sprache:eng
Schlagworte:
AIR
AIR SUPPLY
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
DRAUGHT-INDUCING
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN
SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS
WEAPONS
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Beschreibung
Zusammenfassung:A pulverized coal-fired boiler which can reduce both NOx and CO by supplying air efficiently to the central portion of a furnace and to the vicinity of the furnace wall thereby accelerating mixing with combustion gas. A main after air port is arranged to jet air with a momentum large enough for the air to reach the central portion of a furnace whereas a sub-after-air-port is arranged to jet air with a small momentum to the vicinity of the furnace wall, characterized in that the center of cross-section of the sub-after-air-port falls within a range of 1-5 times the diameter of the main after-air-port from the center of cross-section thereof. A pulverized coal-fired boiler which can reduce both NOx and CO by supplying air efficiently to the central portion of the furnace and to the vicinity of the furnace wall thereby accelerating mixing with combustion gas can thereby be provided.