Denitrifying apparatus

Abstract

Abstract PURPOSE:To prevent untreated exhaust-gas from leaking out, by providing sealing pipings which feed a pressurizing medium to the neighborhood of a bypass damper, in an apparatus to which exhaust-gas duct, a bypass duct equipped with a denitrifying reactor, are connected. CONSTITUTION:The combustion air in an air duct 1 is pressurized by a forced draft fan 2, heated by a steam air-preheater 3 and an air-preheater 4, and is fed into a boiler 5. On the other hand, the exhaust gas burnt in a boiler 5 is discharged to the open air, passing through the air-preheater 4 and an induced fan 9, after passing through an exhaust-gas duct 6, and is denitrified by a denitrifying reactor 7. Besides, sealing pipings 16A and 16B to feed a pressurizing medium are annexed to the neighborhood of the damper 15 of a bypass duct 14. When the afore-mentioned denitrifying reactor 7 is normally operated, the sealing part of a damper 15 is sealed by opening a valve 17 and by feeding the above-mentioned combustion air to the neighborhood of a damper 15 through the sealing piping 16A, to replace untreated gas with the air.

Inventors

• 👤 Yoshiyuki Takeuchi
• 👤 良之 竹内
• 👤 Shigeo Watanabe
• 👤 成夫 渡辺

Bibliographic Details