Lean premixed combustion chamber for gas turbine

Abstract

The invention discloses a lean premixed combustion chamber for a gas turbine. The lean premixed combustion chamber for the gas turbine is characterized in that a flame tube is fixed in a cartridge receiver, and a plurality of round holes for feeding air are formed in a wall surface of a tail part of the cartridge receiver; an igniter mounting seat for mounting an igniter is arranged on a side surface of the cartridge receiver; a swirl cup with a variable diameter is arranged in the flame tube, and a nozzle swirler combined piece is connected to an inlet of the swirl cup through the cartridge receiver; an on-duty fuel introducing tube is arranged in the center of a nozzle body, and a premixed fuel introducing tube is arranged on an outer ring of the nozzle body; a back cover of a premixed fuel chamber of the swirler combined piece is connected with an inner side of a blade mounting base body to form the premixed fuel chamber; a plurality of blades are fixed on an outer side of the blade mounting base body, a blind hole is formed in every blade along the axial direction, and a plurality of premixed fuel jetting holes are formed in wall surfaces on two sides of every blade; and premixed fuel enters the premixed fuel chamber from the premixed fuel introducing tube, enters a swirler passage through the blind holes and the premixed fuel jetting holes in the blades and is mixed with air. By the lean premixed combustion chamber for the gas turbine, the fuel is uniformly mixed with the air, and the discharge of nitrogen oxide (NOX) of a combustion chamber can be reduced.

Description

technical field [0001] The invention belongs to the technical field of gas turbines, and in particular relates to a lean premixed combustion premixed fuel injection structure applied to a gas turbine combustor and a lean premixed combustor adopting the structure. Background technique [0002] At present, the main problem facing the gas turbine combustor is to reduce pollutants, especially NO X emissions. Lean premixed combustion as a mature dry low NO X Technology has been widely used. The so-called lean premixed combustion is to pre-mix fuel and air upstream of the combustion chamber to avoid a region where the ratio of fuel and air is close to the chemically proper ratio. In this way, the combustion zone is in a state of excess air, so the flame temperature is reduced, thereby greatly reducing the thermal NO X generation. Lean premixed combustion technology reduces NO X The key to emissions is to achieve a homogeneous mixture of fuel and air in the shortest possible ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that under the influence of the upstream incoming air, the fuel jet will cause the fuel to accumulate in a certain area, and the uniform mixing with the air cannot be achieved.

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