CN209926353U - Dual-fuel low NOx gas burner - Google Patents
Dual-fuel low NOx gas burner Download PDFInfo
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- CN209926353U CN209926353U CN201920289642.6U CN201920289642U CN209926353U CN 209926353 U CN209926353 U CN 209926353U CN 201920289642 U CN201920289642 U CN 201920289642U CN 209926353 U CN209926353 U CN 209926353U
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Abstract
The utility model relates to the technical field of burners, in particular to a dual-fuel low NOx gas burner, which comprises a first burner shell, wherein a port at one end of the first burner shell is connected with a first gas inlet, and the side wall of the first burner shell is connected with a second gas inlet; the second combustion gas pipe is butted with the other end of the first burner shell, and the other end of the second combustion gas pipe is connected with a first air deflector; the first gas pipe is arranged in the first burner shell, one end of the first gas pipe is communicated with the first gas inlet, the other end of the first gas pipe extends to the joint of the second gas pipe and the first air flow guider, and the end part of the first gas pipe is provided with a first gas nozzle; the first air pipe shell is sleeved outside the second gas pipe, the side wall of the first air pipe shell is provided with a first air inlet, and one end of the first air pipe shell is butted with one end of the second gas pipe, which is connected with the first burner shell; and the first combustion chamber is connected to the other end of the first air pipe shell.
Description
Technical Field
The utility model relates to a combustor technical field, concretely relates to low NOx gas nozzle of dual fuel.
Background
The burner is one of the most important key devices in the field of thermal kilns, the more excellent the performance of the burner, the greater the contribution to product quality, energy consumption, environmental protection and the like, the burner of the existing industrial kiln is, or is a fuel (gas or fuel oil) burner, or is an oil-gas dual-fuel burner, and for the industrial application field with poor resources, one fuel sometimes can not meet the heat processing requirement, and two fuels, particularly two fuels with different heat values, need to be prepared. And traditional nozzle, mostly are the nozzle of one-level burning, because the defect of its structure makes its gas only pass through once mixing combustion to make the burning of gas incomplete, influence the energy conversion rate of system, the flame temperature field of nozzle is also inhomogeneous, and the NOx emission in the flue gas composition is big, the polluted environment, influences system's work even.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, the utility model provides a low NOx gas nozzle of dual fuel, include:
the first burner shell is of a cavity structure with openings at two ends, one end port of the first burner shell is connected with a first fuel gas inlet, and the side wall of the first burner shell is connected with a second fuel gas inlet;
the second combustion gas pipe is butted with the other end of the first burner shell, the other end of the second combustion gas pipe is connected with a first air flow guider, and the side wall of the first air flow guider is provided with a plurality of openings;
the first gas pipe is horizontally arranged in the first burner shell, one end of the first gas pipe is communicated with the first gas inlet, the other end of the first gas pipe extends to the joint of the second gas pipe and the first air flow guider, and the end part of the first gas pipe is provided with a first gas nozzle;
the first air pipe shell is of a tubular structure and is sleeved outside the second gas pipe, the side wall of the first air pipe shell is provided with a first air inlet, and one end of the first air pipe shell is butted with one end of the second gas pipe, which is connected with the first burner shell;
a first combustion chamber connected to the other end of the first air tube housing;
the first ignition device is arranged on the side wall of the first air pipe shell, and the ignition end of the first ignition device extends into the first air deflector.
Preferably, the first ignition device is arranged on the side wall of the first air pipe shell, and the ignition end of the first ignition device extends into the first air deflector.
Preferably, the second ignition device is arranged in the first gas pipe.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a dual-fuel low NOx gas burner according to an embodiment of the present invention;
FIG. 2 is a side view of a dual fuel low NOx gas burner in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a dual-fuel low NOx gas burner according to an embodiment of the present invention;
FIG. 4 is a schematic view of a second gas nozzle according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
fig. 6 is a schematic view of the rotation angle of the blade according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 and fig. 2, the utility model provides a dual-fuel low NOx gas burner, a first burner housing 1, which is a cavity structure with openings at two ends, wherein a port at one end is connected with a first gas inlet 2, and a side wall is connected with a second gas inlet 3;
the second combustion gas pipe 4 is butted with the other end of the first burner shell 1, the other end of the second combustion gas pipe 4 is connected with a first air flow guider 5, and the side wall of the first air flow guider 5 is provided with a plurality of openings;
the first gas pipe 6 is arranged in the first burner shell 1, one end of the first gas pipe is communicated with the first gas inlet 2, the other end of the first gas pipe extends to the joint of the second gas pipe 4 and the first air fluid director 5, and the end part of the first gas pipe is provided with a first gas nozzle 7;
the first air pipe shell 8 is of a tubular structure, is sleeved outside the second gas pipe 4, is provided with a first air inlet 9 on the side wall, and is butted with one end of the second gas pipe 4, which is connected with the first burner shell 1;
a first combustion chamber 10 connected to the other end of the first air tube case 8;
and the first ignition device 11 is arranged on the side wall of the first air pipe shell 8, and the ignition end of the first ignition device extends into the first air deflector 5.
The working principle of the technical scheme is as follows:
when a single gas source is used, for example, natural gas is used, the natural gas passes through the first gas inlet, passes through the first gas pipe, is conveyed to the first gas nozzle, forms a rotational flow, enters the first air flow director, or enters the first air flow director from the second gas inlet, passes through the second gas pipe, enters the first air flow director, and enters the first air flow director from the first air inlet, and passes through the first air pipe housing, a part of the air enters the first air flow director from an opening in a side wall of the first air flow director, and is mixed with the natural gas for the first time, and is combusted for the first time under the ignition effect of the first ignition device.
When two gas sources are used, for example, natural gas and low-calorific-value gas are used, the natural gas and the low-calorific-value gas are respectively introduced from the first gas inlet and the second gas inlet, are mixed by the first air flow guide device, and are ignited and combusted under the action of the first ignition device, and the air mixing process is the same as the above process.
The beneficial effects of the above technical scheme are:
this embodiment can realize two kinds of combustible gas's independent burning or co-combustion, and has independent gas channel, and stability is good, and this embodiment reduces flame center oxygen content through multistage co-combustion simultaneously, reduces flame temperature, suppresses NOx and generates, reduces the NOx content in the combustion products, and flame temperature distributes more evenly, improves heating quality.
In one embodiment, as shown in fig. 3, a dual fuel low NOx gas burner comprises:
the first burner shell 1 is a cavity structure with openings at two ends, a port at one end is connected with a first fuel gas inlet 2, and the side wall of the first burner shell is connected with a second fuel gas inlet 3;
the second combustion gas pipe 4 is butted with the other end of the first burner shell 1, the other end of the second combustion gas pipe 4 is connected with a first air flow guider 5, and the side wall of the first air flow guider 5 is provided with a plurality of openings;
the first gas pipe 6 is arranged in the first burner shell 1, one end of the first gas pipe is communicated with the first gas inlet 2, the other end of the first gas pipe extends to the joint of the second gas pipe 4 and the first air fluid director 5, and the end part of the first gas pipe is provided with a first gas nozzle 7;
the first air pipe shell 8 is of a tubular structure, is sleeved outside the second gas pipe 4, is provided with a first air inlet 9 on the side wall, and is butted with one end of the second gas pipe 4, which is connected with the first burner shell 1;
a first combustion chamber 10 connected to the other end of the first air tube case 8;
in this embodiment, the first gas pipe 6 is a three-way pipe, and the other end thereof is provided with a second ignition device 21.
In this embodiment, the second ignition device 21 includes an igniter housing 21-1 having a cavity structure with openings at two ends, an ignition air inlet 21-2 is formed in a sidewall thereof, one end of the igniter housing 21-3 is connected to an ignition gas inlet 21-3, the other end of the igniter housing is connected to the other end of the first gas pipe 6, an ignition air pipe 21-5 is horizontally disposed in the first gas pipe 6, one end of the ignition air pipe 21-5 is communicated with the inside of the igniter housing 21-1, the other end of the ignition air pipe 21-5 is flush with the end of the third gas pipe 20 near the first air deflector 5, an ignition gas pipe 21-6 is disposed in the igniter housing 21-1, one end of the ignition air pipe 21-3 is connected to the ignition gas inlet, and the other end extends to the end of the ignition air pipe 21-5 near the first air deflector 5, and the end part of the second gas nozzle is provided with a second gas nozzle 22, a third combustion chamber 21-4 is connected outside the second gas nozzle 22, and the side wall of the third combustion chamber 21-4 is provided with a plurality of open pores.
In this embodiment, the inner wall of the first air tube housing 8 and the inner wall of the ignition air tube 21-5 are provided with a fiber lining.
The working principle of the embodiment is the same as that of the embodiment, and the difference is that the ignition power of the first ignition device is small, and the power of the whole burner is also small; the second ignition device arranged at the axial tail end has larger power, and the corresponding burner has larger power.
As shown in fig. 4-6, in one embodiment,
the second gas nozzle 22 comprises a swirler body 22-1 and a sleeve 22-2 welded on the swirler body 22-1 by spot welding.
The cyclone body 22-1 adopts a 310S heat-resistant stainless steel plate with the thickness of 12mm as a base body, 12 uniformly distributed cyclone blades 22-3 are obliquely processed at the outer edge of the cyclone body 22-1, the height of the blades is 6mm, the thickness of the blades is 10mm, the diameter of a root circle is phi 60mm, and the B angle is 13 degrees. The center of the swirler body 22-1 is provided with a gas nozzle 22-5, the diameter of the gas nozzle 22-5 is 10mm, and the center of the gas nozzle is superposed with the center of the swirler body 22-1, so that the design can ensure that the gas and the air are fully mixed, the flame shape is stable, and the flame is sprayed along the central line. The swirler body 22-1 is provided with 12 phi 8mm spray holes 22-4 which are uniformly distributed on a reference circle with the diameter of phi 42mm and have a certain angle outside the gas nozzle 22-5, the center of the reference circle is superposed with the center of the swirler body 22-1, in order to improve the stability of the rotational flow and the flame shape, the center line of the spray holes 22-4 and the central axis of the swirler body 22-1 form an acute angle A, wherein the angle A is designed to be 13 degrees. 2 ignition electrode mounting holes 22-6 are symmetrically arranged on the cyclone body 22-1. In order to reduce the interference of the ignition electrode mounting holes 22-6 on the cyclone wind form, the blades at the two mounting holes need to be specially processed, and the thickness of the blades is 30 mm.
The sleeve 22-2 is made of 310S stainless steel, the outer diameter is phi 89mm, the thickness is 4mm, the length of the sleeve is 125mm, the sleeve is welded on the swirler body 22-1 through 4 welding points, and a 4.5mm gap is formed between the sleeve and the swirler vane.
The technical effect of the technical scheme is as follows:
in the embodiment, the second gas nozzle can realize the sufficient mixing of air and fuel gas through the design of the sleeve and the spray hole angle and the rotational flow acceleration effect of the rotational flow blades on the fuel gas, so that the moderate flame length is ensured, and the service life of equipment is reduced and prolonged. The method has obvious effect on improving the production efficiency and reducing the use and maintenance cost of equipment.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (3)
1. A dual-fuel low NOx gas burner, comprising: the first burner shell (1) is of a cavity structure with openings at two ends, one end port of the first burner shell is connected with a first fuel gas inlet (2), and the side wall of the first burner shell is connected with a second fuel gas inlet (3);
the second gas pipe (4) is butted with the other end of the first burner shell (1), the other end of the second gas pipe (4) is connected with a first air flow guider (5), and the side wall of the first air flow guider (5) is provided with a plurality of openings;
the first gas pipe (6) is arranged in the first burner shell (1), one end of the first gas pipe is communicated with the first gas inlet (2), the other end of the first gas pipe extends to the joint of the second gas pipe (4) and the first air flow guider (5), and the end part of the first gas pipe is provided with a first gas nozzle (7);
the first air pipe shell (8) is of a tubular structure, is sleeved outside the second gas pipe (4), is provided with a first air inlet (9) on the side wall, and is butted with one end, connected with the first burner shell (1), of the second gas pipe (4) at one end;
a first combustion chamber (10) connected to the other end of the first air tube housing (8);
the first ignition device (11) is arranged on the side wall of the first air pipe shell (8), and the ignition end of the first ignition device extends into the first air deflector (5).
2. The dual fuel low NOx gas burner of claim 1, further comprising a first ignition device (11), said first ignition device (11) being disposed on a side wall of said first air tube housing (8) with its ignition end extending into said first air deflector (5).
3. A dual fuel low NOx gas burner according to claim 1, further comprising a second ignition device (21), said second ignition device (21) being arranged in said first gas pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289642.6U CN209926353U (en) | 2019-03-07 | 2019-03-07 | Dual-fuel low NOx gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289642.6U CN209926353U (en) | 2019-03-07 | 2019-03-07 | Dual-fuel low NOx gas burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209926353U true CN209926353U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920289642.6U Active CN209926353U (en) | 2019-03-07 | 2019-03-07 | Dual-fuel low NOx gas burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209926353U (en) |
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2019
- 2019-03-07 CN CN201920289642.6U patent/CN209926353U/en active Active
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