OPERATION OF COMBUSTION FURNACE

PURPOSE:To reduce NOx originating from a burner by recirculating a part of exhaust gas via a burner throat, when a boiler is put in start-up or low-load operation, in the combustion furnace equipped with the burner, burner throat and the exhaust gas recirculating system. CONSTITUTION:A boiler 1 has...

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Hauptverfasser: HOTSUTA NAOAKI, MASUKO SHIYOUICHI
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creator HOTSUTA NAOAKI
MASUKO SHIYOUICHI
description PURPOSE:To reduce NOx originating from a burner by recirculating a part of exhaust gas via a burner throat, when a boiler is put in start-up or low-load operation, in the combustion furnace equipped with the burner, burner throat and the exhaust gas recirculating system. CONSTITUTION:A boiler 1 has its furnace 2 provided with a burner 3 and a burner throat 4 as well as its top with an exhaust gas flue 6. Recirculating gas is led to gas recirculating duct 7 which brances off from the exhaust gas flue 6 to a gas recirculating fan inlet damper 10A, a furnace bottom inlet damper 11 and finally to the furnace 2. When the boiler 1 is put in start-up or low-load operation, a part of the recirculating gas from the gas recirculating fan 9 is sent to branch duct 8 to be pressure-fed via a fan 10 into a wind box 5 and then into the furnace 2 via the burner throat 4. With this, the gas velocity necessary for the burner throat 4 is secured to enable reduction in NOx originating from the burner 3.
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CONSTITUTION:A boiler 1 has its furnace 2 provided with a burner 3 and a burner throat 4 as well as its top with an exhaust gas flue 6. Recirculating gas is led to gas recirculating duct 7 which brances off from the exhaust gas flue 6 to a gas recirculating fan inlet damper 10A, a furnace bottom inlet damper 11 and finally to the furnace 2. When the boiler 1 is put in start-up or low-load operation, a part of the recirculating gas from the gas recirculating fan 9 is sent to branch duct 8 to be pressure-fed via a fan 10 into a wind box 5 and then into the furnace 2 via the burner throat 4. 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subjects AIR
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN
REGULATING OR CONTROLLING COMBUSTION
WEAPONS
title OPERATION OF COMBUSTION FURNACE
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