| 摘要 |
PURPOSE:To reduce NOX to the extremely small quantities and at the same time contrive to improve the combustion efficiency and to prolong the service life of catalysts by a structure wherein a honeycomb catalyst, the main component of which is noble metal bearing lanthanum chromite, is arranged on a front stage in a gas turbine combustor equipped with a plurality of catalysts as combustion aids. CONSTITUTION:A combustor equips with an ordinary noble metal bearing honeycomb catalyst 7, a honeycomb catalyst 8, which is arranged on the front stage side of the catalyst 7 and the main component of which is noble metal bearing lanthanum chromite, a secondary fuel nozzle 10, and a primary fuel nozzle 11 and yet the catalyst 8 generates heat by nergizing. The fuel 12 jetted from the nozzle 11 mixes with combustion air 3 and then passes through the catalyst 8. At this time, catalytic combustion occurs regardless of the temperature of said mixture of the fuel 12 and the combustion air 3 being low. Once the catalytic combustion occurs, the temperature of the catalyst 8 is maintained by the electric power and heat of combustion. The total quantity or a part of the primary fuel 12 is burnt at the catalyst 8, resulting in heating the secondary fuel 13 and combustion air 3 up to a high temperature necessary for starting catalytic combustion at the catalyst 7. The heated mixture of the fuel 13 and the air 3 is catalytically burnt at the catalyst 7, resulting in establishing low NOX and highly efficient combustion. |
