Whirl burner

FIELD: the invention refers to arrangements in which components of fuel are given rotational motion.

SUBSTANCE: the burner is designed for combustion chambers of stationary gas turbine engines and provides reduction in forming nitric oxide Nox and their rejections into the atmosphere. The whirl burner has a pipeline of feeding of gaseous fuel with a cylindrical mixer of fuel and air coaxially located on it behind its output with an air wane swirler on the input into the mixer and a diffuser at the output. The pipeline of feeding of gaseous fuel has in series connected a fuel collector, a swirler and an output section in the shape of a cylindrical bushing closed from one butt-end and connected from the side of the other butt-end trough the output bushing of the smaller diameter with the mixer of fuel and air, the cylindrical bushing is additionally connected through the water swirler and the water collector with the pipeline of feeding water. At that the fuel and water collectors are located on the cylindrical mixer of fuel and air in the area of the air wane swirler, the fuel and water swirlers are fulfilled in the shape of channels in the blades of the air swirler directed crosswise the longitudinal axle of the burner at a tangent to the inner diameter of the cylindrical bushing.

EFFECT: provides reduction in formation of nitric oxides Nox and their rejections in the atmosphere.

4 cl, 4 dwg

 

The invention relates to burners in which the components are given a swirling motion. The burner is designed for the combustion chamber of a stationary gas turbine engines.

Known swirl burner that contains the pipeline supply of gaseous fuels with a coaxially located behind the output of a cylindrical mixer fuel with air and the air vane swirler inlet mixer and diffuser at the outlet (Weplace, Aiellos, Amensty. "The influence of design parameters of the vortex gas burners on the characteristics of the ring of aircraft combustor" // the Burning stream: interuniversity collection. Kazan, 1982. P. 56-61, page 58, Fig. 1B).

The disadvantage of this device is the relatively low efficiency of the mixing process of fuel gas and air and, as a consequence, the low efficiency of combustion and the presence of significant quantities of hazardous substances in the combustion products.

Object of the invention is the intensification of the process of mixing fuel with air by filing in the pulsation mode of the fuel-water fine aerosols in the combustion chamber, combustion under the influence of acoustic vibrations and reducing emissions of nitrogen oxides NOxin atmosphere.

This task is achieved by the fact that in the swirl burner that contains the pipeline dive torches etc is and gaseous fuels with a coaxially located behind the output of a cylindrical mixer fuel with air and the air vane swirler inlet mixer and diffuser at the outlet, the pipeline supply of gaseous fuel is supplied connected in a fuel reservoir, a swirl of fuel and the output section in the form of a cylindrical sleeve closed at one end and communicated with the other end through the outlet sleeve of smaller diameter with a mixer of fuel and air, a cylindrical sleeve is additionally connected through a swirl of water and a water collector pipe water supply, with fuel and water reservoirs located above the cylindrical mixer of fuel and air in the area of the air vane of the swirler, the swirler fuel and water made in the form of channels in the blades of the air swirl, directed transversely to the longitudinal axis of the burner tangentially to the inner surface of the cylindrical sleeve.

It is advisable that the ratio of the inner diameters of the output and cylindrical bushings were selected in the range of 0.5÷of 0.95, and the direction of twist of swirlers gaseous fuel and water was selected to one side.

In addition, the cylindrical sleeve may be additionally connected through the swirler and the collector pipeline liquid fuel supply, while the collector is placed over a cylindrical mixer of fuel and air in the area of the air vane swirl, swirl the liquid fuel is performed in the de channels in the blades of the air swirl, directed transversely to the longitudinal axis of the burner tangentially to the inner surface of the cylindrical sleeve, and the direction of twist of swirlers liquid fuel and water are selected to one side.

New here is the fact that the pipeline supply of gaseous fuel is supplied connected in a fuel reservoir, a swirl of fuel and the output section in the form of a cylindrical sleeve closed at one end and communicated with the other end through the outlet sleeve of smaller diameter with a mixer of fuel and air, a cylindrical sleeve is additionally connected through a swirl of water and a water collector pipe water supply, with fuel and water reservoirs located above the cylindrical mixer of fuel and air in the area of the air vane of the swirler, the swirler fuel and water made in the form of channels in the blades of the air swirl, directed transversely to the longitudinal axis of the burner tangent to the inner surface of the cylindrical sleeve.

This embodiment of the vortex burner, when it operates on gaseous fuel with the addition of water will allow the flow of the fuel-water mixture for mixing with air and burning through the "vortex whistle", so that mixing of the components: fuel and water aerosols and air, and, further, groeneboom take place under the action of acoustic waves.

This intensifies the whole process, increases efficiency and reduces harmful emissions of nitrogen oxides NOxin atmosphere.

New here is that the supply of gaseous fuel mixed with water into the combustion chamber through the vortex whistle. The prior art vortex burners that mix fuel and air in a pulsating mode, using vane swirler. The effectiveness of such burners is low due to the low level oscillation.

Therefore, we can conclude that the proposed solution meets the criteria of "novelty" and "inventive step".

Also new is that:

a) the ratio of the inner diameters of the output and the cylindrical bushing is selected in the range of 0.5÷0,95. This interval ensures normal operation of the vortex whistle;

b) a cylindrical sleeve is additionally connected through the swirler and the collector pipeline liquid fuel supply, while the collector is placed over a cylindrical mixer of fuel and air in the area of the air vane swirl, swirl the liquid fuel in the form of channels in the blades of the air swirl, directed transversely to the longitudinal axis of the burner tangentially to the inner surface of the cylindrical sleeve. Canadapayday line for supplying liquid fuel allows you to quickly move from gaseous to liquid fuel without additional modifications of the burner. This ability is especially important for engines operating in the composition of power plants generating electricity;

C) the direction of the twist of swirlers gaseous fuel and water are selected to one side;

d) the direction of the twist of swirlers liquid fuel and water are selected to one side.

Figure 1 shows a longitudinal section of the vortex burner.

Figure 2 shows a cross-section of the burner section of the vortex of swirlers water.

Figure 3 shows a cross-section of the burner section of the vortex of gaseous fuel swirler.

Figure 4 shows a transverse section of the burner section of the vortex of liquid fuel swirler.

Swirl burner contains a pipeline supply of gaseous fuels 1 with coaxial located behind the output of a cylindrical mixer fuel with air 2 and the air vane swirler 3 input mixer 2 and cone 4 to the exit. The pipeline supply of gaseous fuels 1 is equipped with a series-connected fuel reservoir 5, the swirl of the fuel 6 and the output section in the form of a cylindrical sleeve 7, closed at one end 8 and is communicated with the other end face 9 through the output sleeve 10 of smaller diameter with a mixer of fuel and air 2. A cylindrical sleeve 7 is additionally connected through a swirl of water 11 and sodanaikaisen 12 with pipe water supply 13, this 5 fuel and water 12 collectors placed over a cylindrical mixer fuel and air 2 in the area of the air vane swirl 3. The fuel swirler 6 and the water 11 in the form of channels 14 and 15 respectively in the blades 16 of the air swirl 3 directed transversely to the longitudinal axis 17 of the burner tangentially to the inner surface 18 of the cylindrical sleeve 7. The ratio of the inner diameters of the output and the cylindrical bushing is selected in the range of 0.5÷0,95. A cylindrical sleeve 7 is additionally connected through the swirler 19 and the collector 20 with the pipe feeding the liquid fuel 21, and the manifold 20 is placed over a cylindrical mixer fuel and air 2 in the area of the air vane swirl 3. Swirl the liquid fuel 19 is made in the form of channels 22 in the blades 16 of the air swirl 3 directed transversely to the longitudinal axis 17 of the burner tangentially to the inner surface 18 of the cylindrical sleeve 7. The direction of twist of the gaseous fuel swirler 6 and water 11 is selected in one direction. The direction of twist of the liquid fuel swirler 19 and water 11 is selected to one side.

Works swirl burner as follows. The fuel gas from the reservoir 9 through the tangential channels 7, located in the blades of the air swirler 8, enters the cylindrical sleeve 5, is it the same from the reservoir 10 through similar channels 7, located in the blades of air swirler 8, enters the water. These two components, curled into a cylindrical sleeve 5 and leaving the sleeve of smaller diameter 6 in the form of fuel-water aerosols, mixed with air entering through the air swirler 2 at the entrance to the diffuser 3 and then in the vibrational mode. Later in the combustion chamber under the action of acoustic oscillations is burning components.

This process of mixing components and combustion leads to rapid combustion of fuel with high completeness complete chemical processes, and the participation of water in the combustion process leads to fuel economy and reduce harmful emissions of nitrogen oxides NOxin atmosphere.

If necessary, the burner can work not only gaseous fuel and liquid fuel without any structural alterations. Just line feed gaseous fuel stops, and opens the line of flow of the liquid fuel. When switching the operation of the burner with gaseous to liquid fuel operation in a similar way.

1. Swirl burner that contains the pipeline supply of gaseous fuels with a coaxially located behind the output of a cylindrical mixer fuel with air and the air vane swirler inlet mixture is spruce and the diffuser outlet, characterized in that the pipeline supply of gaseous fuel is supplied connected in a fuel reservoir, a swirl of fuel and the output section in the form of a cylindrical sleeve closed at one end and communicated with the other end through the outlet sleeve of smaller diameter with a mixer of fuel and air, a cylindrical sleeve is additionally connected through a swirl of water and a water collector pipe water supply, with fuel and water reservoirs located above the cylindrical mixer of fuel and air in the area of the air vane of the swirler, the swirler fuel and water made in the form of channels in the blades of the air swirl, directed transversely to the longitudinal axis of the burner at a tangent to the inner surface of the cylindrical sleeve.

2. Swirl burner according to claim 1, characterized in that the ratio of the inner diameters of the output and the cylindrical bushing is selected in the range of 0.5÷0,95.

3. Swirl burner according to claim 1, characterized in that the cylindrical sleeve is additionally connected through the swirler and the collector pipeline liquid fuel supply, while the collector is placed over a cylindrical mixer of fuel and air in the area of the air vane swirl, swirl the liquid fuel in the form of channels in the blades of the air is the main swirler, directed transversely to the longitudinal axis of the burner tangentially to the inner surface of the cylindrical sleeve.

4. Swirl burner according to claim 1, characterized in that the direction of twist of swirlers gaseous fuel and water are selected to one side.

5. Swirl burner according to claim 3, characterized in that the direction of twist of swirlers liquid fuel and water are selected to one side.



 

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