Overfiring air port, method for manufacturing air port, boiler, boiler facitily, method for operating boiler facility and method for improving boiler facility

• Main Authors: YAMAMOTO, KENJI, OCHI, KENICHI, OKAZAKI, HIROFUMI, YANO, TAKANORI, ORII, AKIHITO, KAMIKAWA, YUKI, KIYAMA, KENJI, TANIGUCHI, MASAYUKI, BABA, AKIRA, ORITA, HISAYUKI, YASUDA, KAZUMI
• Format: Patent
• Language: English; French; German
• Published: 03.10.2012
• Subjects: AIR; AIR SUPPLY; BLASTING; BURNERS; 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

An overfiring air port (100) of the present invention is to supply an incomplete combustion region with air making up for combustion-shortage, in a furnace in which the incomplete combustion region less than stoichiometric ratio is formed by a burner. Furthermore, the airport is characterized by comprising: a nozzle mechanism for injecting air including an axial velocity component of an air flow and a radial velocity component directed to a center line of the air port (100) ; and a control mechanism for controlling a ratio of these velocity components.