COMBUSTOR SYSTEM, EXHAUST GAS FURNACE, BURNER, AND EXHAUST GAS BURNING METHOD

摘要

PURPOSE:To provide a furnace reducing a nitrogen oxide in the exhaust gas and further reduce NOx for exhaustion by burning fuel with gas exhausted from a combustor in a combustor system having the combustor such as a gas turbine. CONSTITUTION:The NOx (nitrogen oxide) in the exhaust gas exhausted from a gas turbine 20 is reduced in a furnace 10 and exhausted through a chimney 30. Fuel is burned in the furnace 20 with combustion gas exhausted from the gas turbine 20. A burner nozzle 11 aimed at low NOx is provided. Oxygen about 15-16% is ordinarily contained in the exhaust gas from the gas turbine, and the fuel is burned with this oxygen. The fuel is burned, with the exhaust gas containing low oxygen, thus a flame 52 easily forms a flame with a low air ratio, the combustion gas containing a large quantity of an unburnt component such as H2 and CO is generated from this flame 52, and it reduces the NOx contained in the exhaust gas 53.