Burner device

FIELD: engines and pumps.

SUBSTANCE: burner device incorporates a central fuel jet and coaxial circular rings forming air feeding channels provided differently directed blade swirlers and tapered deflectors arranged at the output of every channel to deflect air flows from the center to periphery. Here, the swirler adjacent blade inclination angles are set be different with the 0.5 to 0.8 ratio.

EFFECT: higher uniformity of heating the furnace space by intensifying air turbulence in crossing its swirled flows.

3 dwg

 

The invention relates to a device for burning fuel and can be used in furnaces and combustion chambers of gas turbine installations.

Known burner device containing a Central fuel injector, several consecutive tangential blade multidirectional of the swirler air, is supplied at the output of curved reflectors, converts the movement of air from initially directed radially inwards in the axial direction. The fuel jet from the Central nozzle, crossing air flow, enters the system annular projections curved reflectors, in the process of this movement is provided by atomization, vaporization and mixing of fuel with air, after which the prepared mixture flows into the combustion chamber (Patent GB No. 2272756, MKI F23R 3/14).

A disadvantage of this device is the inability to burn the fuel-air mixture in the form of a flat torch, as well as the fact that the device only generates an air-fuel mixture, resulting in can not be used to heat the working volume, for example, an oven.

You know the burner, taken as a prototype, containing a Central fuel nozzle, coaxial annular ribs forming air passages, equipped with multidirectional shoulder and a swirler, moreover, the outer shell is made in the form of fuel manifold, fuel openings which are directed perpendicular to the Central nozzle holes, and a conical reflectors installed on the outlet of each channel with the possibility of deviation of the air flows from the center to the periphery (Patent RU №2183798, MKI F23R 3/14).

This is the burner allows you to create a system of parallel fan swirling flows of air, in contact areas are experiencing an increase in the turbulence intensity of the flow that ensures rapid mixing of fuel with air and in combination with the specified direction of the jets of fuel allows you to organize flat torch with improved organization of the burning air-fuel mixture, allowing to heat the furnace volume to a predetermined temperature.

However, in this burner device of the jet emerging from the neighboring (adjacent) channels of swirlers, interact, and, due to a standard equal to the angle of the vanes of the swirler, are the result of a coaxial jet. It does not provide enough high quality mixing of air flows from adjacent channels between themselves and with the fuel, so that the torch has too much dispersed and the Central zone, in which ejectives cold air from the periphery, that is CI, in the result box temperatures created by the torch, not evenly.

The problem solved by the invention is to improve the uniformity of heating of the furnace volume by increasing the intensity of air turbulence by crossing his fan swirling flows.

This problem is solved as follows.

In the known burner device containing a Central fuel nozzle and coaxial annular ribs forming air passages, equipped with multi-directional blade swirler, and conical reflectors installed on the outlet of each channel with the possibility of deviation of the air flows from the center to the periphery, according to the invention the angle of inclination of the blades adjacent channels of swirlers are made different in size with a ratio of 0.5-0.8.

The sequential decrease or increase the angle of inclination of the vanes of the swirler within the specified limits, as well as any combination of this condition provides the optimum angle of crossing of the jets emerging from adjacent channels and high quality mixing of streams of air and fuel.

1 shows a General view of the proposed burner.

Figure 2 shows a vector diagram of the air flow emerging from adjacent channels of swirlers.

Figure 3 is redstavlena thermal imaging picture of the torch of the proposed burner.

The burner has a Central fuel injector 1 fuel injection holes 2, the annular shell - outer 3, 4 and the inner intermediate 5. In coaxial cavities 6 between shells installed blades 7, 8, 9, forming a multidirectional channels-swirlers 10, 11, 12. Angle β blades 8 is 0.5-0.7 a similar angle α blades 7, and the angle of γ blades 9 is 0.5-0.7 a similar angle β blades 8. The output of the coaxial cavity 6 at the ends of the inner and intermediate shells 4 and 5 are made reflectors 13 in form of a cone, the ends 14 which is placed above the fuel injection holes 2 of the injector 1. The burner is installed in the end wall 15 of the combustion chamber 16.

An example of a specific execution of the sequential decrease in the angle of inclination of the blades:

α=45°

β=30°

γ=15°

The number of channels of swirlers limited to a maximum value of the angle γ=15° and limiting value of the angle α=75°.

When β<0,5 α and γ<0,5 β the following occurs: the angle of intersection of the resulting jets of air coming from adjacent channels becomes too large, which leads to the reduction of the resulting pulse stream. This adversely affects the mixing of fuel with air.

When β>0,8 1 and γ>0,8 β the following occurs: the resulting jet of air emerging from adjacent channels, released almost simultaneously, resulting in poor mixing.

An example of a specific implementation with the progressive increase of the pitch angle of the blades:

α=15°

β=30°

γ=45°

The number of channels of swirlers limited to a maximum value of the angle α=15° and limiting value of the angle γ=75°.

An example of a specific implementation for an arbitrary combination of the claimed ratio of the pitch angle of the blades:

α=15°

β=30°

γ=15°

χ=30°

ϕ=45°

λ=60°

The number of channels of the swirler is not limited.

The burner works as follows.

The fuel comes from the Central fuel injector 1 into the combustion chamber 16 in the form of fan jets, mixing with the air streams emerging from the multi-directional vane channels 10, 11, 12. Thus, the air flow is deflected in the radial direction from the center to the periphery of the conical reflectors 13 and distributed in the form of criss-crossing streams. The consistent reduction of the angle of inclination of the vanes of the swirler within the specified limits provides the optimum angle of crossing of the jets emerging from adjacent channels and high qualities of the mixing of streams of air and fuel. In the contact area of the jets there is a sharp increase in the turbulence intensity of the flow, which ensures good mixing of air with fuel and a quick burn of the mixture.

Proposed the burner allows you to create vysokotsentralizovannym torch with a uniform distribution of the temperature field at a distance of 2-3 calibers from the edge of the burner.

Burner device containing a Central fuel nozzle and coaxial annular ribs forming air passages, equipped with multi-directional blade swirler, and conical reflectors installed on the outlet of each channel with the possibility of deviation of the air flows from the center to the periphery, characterized in that the angle of inclination of the blades adjacent channels of swirlers are made different in size with a ratio of 0.5-0.8.



 

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FIELD: hydrodynamics; heating engineering.

SUBSTANCE: flow swirler can be used for processes of mixing and re-mixing of media, for handling heat exchange process between media and for transportation of different media with lower hydraulic resistance, particularly, different kinds of liquids, gases, different-phase media mixtures and pseudo-liquated powder-shaped media. Double-bladed fluid medium flow swirler has flat blades mounted in tube at angle to flow of liquid medium. Swirler has two similar swirlers mounted in tube with round cross-section. Any blade has profile in form of half-ellipse cut along its longer axis to two blades and achieved due to sloped section of tube, which section is made at angle to axis of tube being equal to angle of slope of blade's edge, formed by longer axis of ellipse, to axis of tube at mounting blades in tube. Angle of slope of blades' edge, formed by longer axis of ellipse, is inversely symmetrical to axis of tube and it equals to 5-85°.

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FIELD: combustion.

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EFFECT: enhanced reliability.

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FIELD: the invention refers to burners in which rotational motion is given at least to one of the components.

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FIELD: combustion.

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FIELD: combustion.

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EFFECT: enhanced efficiency.

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Burner // 2244213

FIELD: combustion.

SUBSTANCE: burner has swirler, gas supplying pipe, and chamber for preparing mixture.

EFFECT: enhanced efficiency.

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FIELD: combustion.

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FIELD: the invention refers to burners in which rotational motion is given at least to one of the components.

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FIELD: combustion.

SUBSTANCE: vortex burner comprises central pipe for supplying oxidizer and outer pipe for supplying fuel. The central oxidizer supply pipe and fuel supply pipe are axially aligned. The oxidizer supply pipe is provided with the deflecting housing that is coaxial to the pipe and is provided with the blades of static swirler and central coaxial cylindrical passage. The outlets of the deflecting housing, the pipe for oxidizer supply, and the pipe for fuel supply are U-shaped to turn around the burner. The surface of the deflecting housing traces the inner wall of the pipe for supplying oxidizer, and the blades of the swirler pass from the surface of the body having no aerodynamic form to the surface of the deflecting housing. The inner and outer blades of the swirler are mounted inside the swirler with an inclination of from 15 to 75 degrees, preferably 20-45 degrees. The outlet cone angle of the central pipe for supplying oxidizer and outer pipe for fuel supply ranges from 15 to 60 degrees, preferably from 15 to 40 degrees.

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FIELD: the invention refers to the field of incineration of fuel particularly to the construction of a fuel-feeding arrangement.

SUBSTANCE: there are two proposed variants of fulfillment of diffusion injector type burners consisting of a body from one side rigidly connected with a nozzle fulfilled in the shape of a diffuser and from the other side- also rigidly- with a control mechanism having a branch pipe for feeding gas. Inside the body there is built-in from the side of the nozzle a throttle fulfilled in the shape of a truncated cone, with its large foundation directed into the side of gas movement, moreover the correlation of the diameter of the nozzle to the large diameter of the throttle does not prevail 1,4. On the throttle there are blades rigidly fixed in such a way that the projections of the lateral walls of the blades overlap free section of the burner. At that the throttle is connected with the control mechanism with the aid of a rod connected with the control mechanism movably. According to the first variant the rod is fulfilled hollow and the throttle is fulfilled with a hollow axis channel, at that the throttle and the rod are connected between themselves hermetically and a regulated shutter is installed in the rod from the side of the control mechanism. According to the second variant the rod is fulfilled hollow. The throttle is fulfilled with a hollow axis channel, at that the throttle and the rod are connected between themselves hermetically. In the channel formed with the cavity of the rod and the axis channel of the throttle there is the second burner for liquid fuel and (or) a tube each of which has one end on the edge of the throttle and with the other end the burner for liquid fuel is connected with an alternative kind of liquid fuel, and the tube is connected with liquid combustible wastes. Besides a regulated shutter fulfilled with possibility of overlapping the free section of the hollow rod and for possibility for passing through it of the second burner for liquid fuel and the tube is installed in the rod from the side of the control mechanism. The invention is directed on increase of intensification of incineration of fuel and besides on providing incineration of several kinds of fuel including utilization of liquid combustible gases.

EFFECT: allows reduce consumption of materials in the process due to replacement of part of the main fuel on more cheap residues of production.

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Flow swirler // 2323386

FIELD: hydrodynamics; heating engineering.

SUBSTANCE: flow swirler can be used for processes of mixing and re-mixing of media, for handling heat exchange process between media and for transportation of different media with lower hydraulic resistance, particularly, different kinds of liquids, gases, different-phase media mixtures and pseudo-liquated powder-shaped media. Double-bladed fluid medium flow swirler has flat blades mounted in tube at angle to flow of liquid medium. Swirler has two similar swirlers mounted in tube with round cross-section. Any blade has profile in form of half-ellipse cut along its longer axis to two blades and achieved due to sloped section of tube, which section is made at angle to axis of tube being equal to angle of slope of blade's edge, formed by longer axis of ellipse, to axis of tube at mounting blades in tube. Angle of slope of blades' edge, formed by longer axis of ellipse, is inversely symmetrical to axis of tube and it equals to 5-85°.

EFFECT: reduced cost of manufactures; improved reliability of operation.

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Burner device // 2327928

FIELD: engines and pumps.

SUBSTANCE: burner device incorporates a central fuel jet and coaxial circular rings forming air feeding channels provided differently directed blade swirlers and tapered deflectors arranged at the output of every channel to deflect air flows from the center to periphery. Here, the swirler adjacent blade inclination angles are set be different with the 0.5 to 0.8 ratio.

EFFECT: higher uniformity of heating the furnace space by intensifying air turbulence in crossing its swirled flows.

3 dwg

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