Burner for gas burning

FIELD: power engineering.

SUBSTANCE: burner for gas burning comprises cylindrical vessel, stabiliser, gas swirler, besides cylindrical vessel is equipped with controlled gate for air supply, and at other side of vessel there is a stabiliser installed along axis with pipe of gas supply, and secondary air swirler blades are rigidly fixed on external cylindrical surface of stabiliser, in inner cavity there is injector installed coaxially and rigidly fixed near end of air and gas supply, and on its outer surface there are blades of gas swirler fixed, and on inner side there is a plate swirler of primary air fixed with two twist flows, besides blades of gas swirlers and secondary air swirlers and plate swirler of primary air have the same twisting direction, and gas swirlers and secondary air swirlers also have equal number of rigidly fixed and axially arranged blades.

EFFECT: improved quality of fuel burning by improved arrangement for mixing of fuel gas, primary and secondary air jets.

1 dwg

 

The invention relates to the technology of burning gaseous fuel in boiler furnaces and ovens.

Known burner for burning a gaseous fuel, comprising a housing, a reflector, the injector and the air supply regulator (Nretas, Way. Gas burner tube furnace. - M.: Tsniiteneftehim, 1984, s). In this burner, the fuel gas is supplied to the injector, the output of which due to the high gas velocity to the gas stream of sucked air and then all air-gas mixture through the reflector is rotated at an angle of 90 to the axis of the burner and to the mixture sucked secondary air entering through the holes in the burner housing.

Known burner for burning a gaseous fuel, comprising a housing, a reflector with a swirl, the injector and the air supply regulator (Nretas, Way. Gas burner tube furnace. - M.: Tsniiteneftehim, 1984, p.160). In this burner, the fuel gas is supplied to the injector, which is also a gas stream of sucked air, mixing in a cylindrical channel, then all gas-air mixture is supplied to the swirl, combined with a reflector, through which the mixture is rotated at a 90 angle to the axis of the burner, and at this point, to the mixture sucked secondary air entering through the holes in the burner housing.

The disadvantages of the known burners is following the E.

1. The burning of the reflector due to direct contact with the torch for continuous operation during operation, resulting in a burner prematurely fails.

2. Coking gap between the reflector and the housing during operation as a result of poor mixing of gas and air, bad gas purification, as well as during transient modes of operation of the burner at start-up and shutdown.

3. The lack of completeness of combustion of fuel in the torch due to poor mixing of gas with air, because the mixing of the jets of air and gas is in the same plane.

4. The necessity of removing the burner to control the gap between the reflector and the housing to change the diameter of the torch.

5. The small surface area of the heating furnace space due to the small diameter of the disclosure of the torch, as you lose the speed of the gas mixture during its collision with the reflector.

6. Small adjustment range thermal capacity of the burner, as in all the modes you want an increased gas pressure due to the large aerodynamic drag of the nozzle, which podsushivaet the air.

Closer to the claimed invention is a burner for burning a gaseous fuel containing a cylindrical housing, a reflector, a stabilizer, a tangential swirl of gas and the regulator gap between the reflector and KOR the mustache (Nretas, Way. Gas burner tube furnace. - M.: Tsniiteneftehim, 1984, s - prototype).

In the burner, the gas passes through a tangential swirl, after which, to him, sucked the primary air. Next, the gas-air mixture is supplied to the reflector, which changes by 90 to the axis of the burner direction of the gas mixture. The turn angle is fixed by the regulator, after which the fuel mixture enters the secondary air. The gap between the reflector and the housing is adjusted with a screw, moving the reflector along the axis of the burner.

The disadvantages of the known burner is the following.

1. The burning of the reflector due to direct contact with the torch for continuous operation during operation resulting in the burner prematurely fails.

2. Coking gap between the reflector and the housing during operation in the sagging of the reflector on the rod due to heat and, as a consequence, the non-uniform gap, bad gas purification, as well as during transient modes of operation of the burner at start-up and shutdown.

3. The lack of completeness of combustion of fuel in the torch at low gas consumption due to poor mixing of gas with air.

4. When you start the burners work needs manual adjustment of the gap between the reflector and the housing to define economical SG is Gania gas, as the burner at low cost has the capability of self-regulation, i.e. the gap between the burner housing and the reflector may be too large or too small relative to the quantity of the combustible mixture. In the first case, the torch is not deployed on the surface of the stabilizer and lit a smoky yellow flame, in the second case, the possible separation of the torch from the stabilizer. All this leads to excessive gas.

The task of the invention is to improve the quality of fuel combustion by improving the organization of mixing of the jets of fuel gas, the primary and secondary air.

The technical result is achieved by the fact that in the burner for combustion gas containing cylindrical body, a stabilizer, swirl gas, a cylindrical housing provided with an adjustable damper for supply air, and on the other side of the hull axis set the stabilizer to the gas supply pipe, the outer surface of which is rigidly fixed blade swirl secondary air in the inner cavity are placed coaxially and rigidly mounted at the end of the air supply and gas injector, on the outer surface of which is fixed vanes of the swirl gas, and the inner side of the vane swirl of the primary air with two streams of twist, and the vanes of the swirler gas, primary and secondary air which have the same direction of twist, and the swirler gas and secondary air have an equal number of fixed, axially spaced blades.

The inventive burner shown in the drawing.

Burner for the combustion gas comprises a cylindrical housing 1, one end of which is fitted with removable cover 2 air gate spring screw regulators 3 size of the opening of the valve 4 gate, on the other hand - axis is mounted stabilizer 5 having the shape of a hollow cylinder with one end of which is fixed a disk. On the outer surface of the cylinder stabilizer 5 evenly spaced around the circumference rigidly fixed axially spaced vanes 6 and the pipe 7 of the fuel gas. Inside the stabilizer near the end of the side tube 7 fuel gas, fixed injector 8, having evenly spaced around the circumference of the blade 9, which is the swirler fuel gas, which are designed to tighten the fuel gas in high-speed harness. Inside the injector 8 is fixed vane axial swirler 10 for the attachment of primary air.

The inventive burner works as follows.

The burner Assembly is installed in a prepared seat in the furnace tight on cylidrical surface of the housing 1, so that the end surface of the housing 1 facing the disk surface stabilizer is a torus, was flush with the inner surface of the wall of the furnace. Fuel gas is supplied through a pipe 7 under pressure on the blades 9, which is twisted into a rope and when exit is pressed, due to centrifugal force, to the inner cylindrical surface of the housing of the stabilizer 5. Inside harness vacuum is formed, and consequently, gas harness podkashivayutsya jet of primary air, swirled in the swirl of the primary air 10 with the direction of twist, coinciding with the direction of twist of the fuel gas. The amount required for the combustion primary air regulates itself by suction due to the speed output of the fuel gas after the blades 9. Primary air enters the slit gap between the cover gate 2 and gate gate 4. Sucking causes intense mixing of the jets of primary air and fuel gas. Due to the centrifugal forces of the air-gas mixture at the outlet of the inner cavity of the stabilizer 5 is deployed in a flat gas stream perpendicular to the axis of the burner. This stream on the edge of the back side of the disc stabilizer sucked swirling vanes of the swirler 6 secondary air, the amount of which is adjusted by changing the gap between the cover gate 2 gate 4 with spring knob 3.

When ignited gas jet fuel hectares is in the jet burns, forming a flat (thickness not more than 100 mm) torch large diameter (up to 3 m)that is parallel to the inner wall of the furnace, but perpendicular to the axis of the burner.

An example of a particular device.

Fuel gas with calorific value 8080 kcal/m3is fed through the pipe 7 at a pressure of 300 kPa in the injector 8, passing through four blades 9, he twisted in the harness of 4 jets with the right twist and at the exit is pressed, due to centrifugal force, to the inner cylindrical surface of the housing of the stabilizer 5, having a disk diameter of the stabilizer 80 mm Inside harness vacuum is formed, and consequently, gas harness podkashivayutsya jet of primary air, swirling with the right twist. This causes intense mixing of primary air and fuel gas. Due to the centrifugal forces of the air-gas mixture at the outlet of the inner cavity of the stabilizer 5 is deployed in a flat gas stream. This stream on the edge of the back side of the disc stabilizer 5 is served twisted right twisting the secondary air and thereby an optimum gas mixture with air excess factor of 1.03. The mixture at the ignition using the igniter lights up, forming a flame from combustion, high-temperature zone which is located at a distance of 50 mm from the inner wall of the furnace. When the flow topl the main gas 30 3/h diameter torch 1.3 m with an average thickness of 60 mm

Burner for the combustion gas containing cylindrical body, a stabilizer, swirl gas, characterized in that the cylindrical body is equipped with an adjustable damper for supply air, and on the other side of the hull axis set the stabilizer to the gas supply pipe, the outer cylindrical surface of which is rigidly fixed blade swirl secondary air in the inner cavity are placed coaxially and rigidly mounted at the end of the air supply and gas injector, on the outer surface of which is fixed vanes of the swirl gas, and the inner side of the vane swirl of the primary air with two streams of twist, and the vanes of the swirler gas and secondary air, and plate swirl of the primary air have the same direction of twist, and the swirler gas and secondary air have an equal number of fixed axially spaced blades.



 

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FIELD: hydrodynamics; heating engineering.

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EFFECT: improved quality of fuel burning by improved arrangement for mixing of fuel gas, primary and secondary air jets.

1 dwg

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