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Combined pressure atomizing nozzle

An atomizing nozzle and combined technology, which is applied in the field of combined pressure atomizing nozzles, can solve the problems of small fuel pulse, not suitable for gas turbines, and inability to realize premixing, etc., so as to ensure uniformity and prevent violent formation.

Inactive Publication Date: 2004-06-16
ANSALDO ENERGIA IP UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] German patent 862 599 discloses a combined two-stage or multi-stage vortex atomizer, but it has a pulse characteristic, which is not suitable for a gas turbine burner
Although a very fine atomization is achieved with the resulting swirl injection, the fuel pulse is too small to achieve a proper distribution of fuel droplets in the combustion air and thus a good premixing

Method used

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Embodiment Construction

[0030] Only some elements important for understanding the invention are drawn here. For example, the combustor of the gas turbine housing the pressure atomizing nozzles is not shown. The flow direction of the working medium is indicated by arrows.

[0031] Referring now to the drawings, in all the drawings the same or equivalent parts are given the same reference numerals. The gas turbine combustor (not shown) housing the above-mentioned pressure atomizer is designed, for example, as a double-cone combustor, as disclosed in patent EP-A2-0321809. Of course, in principle, this pressure atomizing nozzle is also suitable for burners of other gas turbines, thus also suitable for example, by the disclosed burner of patent EP-A2-0 704 657, and by a mixing section adjoining A burner consisting of a vortex generator. The pressure atomizing nozzle has a nozzle body 1 with two pipe parts 2 , 3 arranged concentrically to one another, which are separated downstream from an external spac...

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Abstract

A novel combined pressure atomizing nozzle for gas-turbine burners is provided, with which an improved adaptation of the atomizing quality of liquids to the respective load conditions, i.e. good premixing over the entire load range, can be realized.To this end, the pressure atomizing nozzle comprises a nozzle body (1) having at least two separate feed passages (7, 12) for at least one liquid (14, 29, 31) to be atomized. The first feed passage (7) is at least partly enclosed by the second feed passage (12) and is connected downstream to an outer space (5) via a discharge orifice (11). The second feed passage (12) is likewise connected to the outer space (5), in which case the second feed passage (12) has at least two discharge orifices (13) to the outer space (5).

Description

technical field [0001] The invention relates to a combined pressure atomizing nozzle for liquid fuels of gas turbine combustors, comprising a nozzle body with at least two separate first nozzles for at least one liquid to be atomized. Feed channel, the first feed channel is at least partly surrounded by the second feed channel and communicates downstream via a discharge hole with the external space, and a second feed channel, which also communicates with the external space. Background technique [0002] Low-polluting combustion of liquid fuels such as extra light fuel oil requires complete vaporization of the fuel droplets and premixing of the fuel vapor with the combustion air before reaching the flame crest. Even a few small regions of higher fuel concentration can lead to an increase in the temperature of the reaction zone, thus leading to the violent formation of hot nitrogen oxides. A disadvantage of low-concentration premixed gas flames is that the flame is at a tempe...

Claims

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Application Information

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IPC IPC(8): F23R3/28F23D11/26F23D11/38F23L7/00
CPCF23L7/002F23D11/383F23D11/26
Inventor F·布克伊U·霍弗尔C·施泰纳赫P·扬斯翁
Owner ANSALDO ENERGIA IP UK LTD
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