Burner for a turbine

Abstract

A burner for a turbine has a flame tube, a casing enclosing the flame tube forming an oxidant collection chamber, a burner bottom which bounds the oxidant collection chamber and the combustion space, and a swirler which has a plurality of guide vanes arranged so that the distances between the guide vanes form a plurality of radial inlet passages to the combustion space. A fuel supply pipe is provided in the inlet flow region of at least some of the inlet passages, which fuel supply pipe extends lengthwise through the respective inlet passage in an axial direction of the burner and traverse to an oxidant flow direction, and wherein each fuel supply pipe has in its wall at least one radial fuel output opening by which fuel can be mixed into the respective inlet passage with a directional component extending transverse to the oxidant flow direction.

Description

PRIORITY CLAIM[0001]This is a U.S. national stage of application No. PCT / DE2010 / 050074, filed on 28 Sep. 2010. Priority is claimed on the following application: Country: Germany, Application No.: 10 2009 054 669.3, filed: 15 Dec. 2009, the content of which is incorporated herein by reference.[0002]The present invention is directed to a burner for a turbine and particularly to a burner which is provided with a device for premixing oxidant and fuel for a turbine.BACKGROUND OF THE INVENTION[0003]Premix burners, as they are called, are used in turbines, e.g., gas turbines in order to achieve lower emissions. Through the use of premix technology, the process of mixing fuel and oxidant such as air is decoupled from, i.e., made antecedent to, the actual combustion process. Peak temperatures during combustion can be reduced in this way. At the same time, the retention time of the fuel-oxidant mixture (e.g., fuel-air mixture) in the reaction zone is shortened. In particular, this reduces the...

AI Technical Summary

Benefits of technology

The present invention provides a burner for a turbine with a flame tube, a casing, a swirler, and a fuel supply system. The burner has a plurality of inlet passages with a fuel supply pipe in each inlet passage. The fuel supply pipe has fuel output openings that supply fuel into the inlet passage with a directional component. The invention achieves a homogeneous premixing of fuel and oxidant in a simple and economical manner. The position of the fuel output openings can be adjusted to achieve optimal premixing. The invention also allows for the mixing of fuel and oxidant to be extended to the maximum degree. The invention improves the mixing of fuel and oxidant in the combustor of the burner.

Problems solved by technology

In particular, this reduces the formation of NOx (particularly thermal NOx).

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