Abstract: A premixing swirling burner including a burner body having a swirling member at one end for causing fuel introduced into the burner body to flow in vortical form through the swirling member, a burner outer frame mounting the burner body and communicated with an air line for introducing air into the burner body, and a cylindrical member located in the burner outer frame for enclosing the burner body, with an air passage being defined between the inner periphery of the cylindrical member and an outer periphery of a portion of the burner body. A premixing chamber is defined between an outer periphery of a central portion of the burner body and an inner periphery of the cylindrical member for providing a fuel-air premix flowing toward the swirling member. A fuel chamber introduces fuel into the interior of the burner body, and a fuel ejection nozzle is located along an outer surface of the central portion of the burner body.

Abstract: A combustor of a gas turbine including fuel distributing and supplying means including a plurality of sets of fuel nozzles arranged circularly on the head of the combustor and each fuel nozzle being provided with a combustion primary air swirler, and a plurality of fuel supply systems each connected to one fuel nozzle or a plurality of fuel nozzles. One set of fuel nozzles is located inside another set of fuel nozzles and projects further inwardly into the interior of the combustor. The number of the fuel supply systems handling a supply of fuel can be increased or reduced depending on the volume of fuel.

Abstract: An apparatus for removing nitrogen oxides from a flue gas comprises a first stage of injecting ammonia in a combustion flue gas and then hydrogen peroxide thereto, thereby decomposing nitrogen oxides in the combustion flue gas to nitrogen and water by gas phase reduction, and a second stage of passing the combustion flue gas leaving the first stage through a bed of catalyst whose temperature is controlled by cooling water passing through a cooling pipe provided through the bed of catalyst, thereby conducting decomposition of excess ammonia exiting from the first stage and further reaction of nitrogen oxides at the same time.