CN211781068U

CN211781068U - Full premix combustor

Info

Publication number: CN211781068U
Application number: CN202020128649.2U
Authority: CN
Inventors: 卢宇聪; 潘同基; 李学研; 李罗标; 张上兵; 潘泽林
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-10-27
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a full premix combustor, wherein simple and easy full premix combustor includes the combustor casing, be provided with a plurality of fire punch combination on the combustor casing, fire punch combination includes: the main fire hole is a long hole; the flame stabilizing holes are arranged along two sides of the main flame hole in the length direction, and the number of the flame stabilizing holes positioned on the same side of the main flame hole in the length direction is not less than one; wherein, main fire hole with steady flame hole does punch a hole on the combustor casing, the area in steady flame hole is less than the area in main fire hole, the utility model discloses simple structure can make combustor surface temperature even, can not produce local high temperature, and the burning is stable, prevents that main fire hole from the flame.

Description

Full premix combustor

Technical Field

The utility model relates to a combustor especially relates to a full premix combustor.

Background

The combustion modes of the fuel gas can be divided into diffusion combustion, atmospheric combustion and full premix combustion. At present, most of burners on the market use atmospheric combustion, because gas and air cannot be completely mixed uniformly, incomplete combustion is caused, redundant air can reduce the heat efficiency of heat exchange, and the redundant air can take away a part of heat, so that the heat efficiency is further reduced, and the combustion is insufficient, so that a large amount of harmful gases such as carbon monoxide are easily generated, and therefore, the surface temperature of the existing burner is uneven, and the combustion is insufficient and unstable.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a fully premixed burner to solve one or more technical problems in the prior art, and at least provide a useful choice or creation condition.

The technical scheme adopted for solving the technical problems is as follows:

a full premix combustor, includes the combustor casing, be provided with a plurality of fire hole groups on the combustor casing, the fire hole group includes: the main fire hole is a long hole; the flame stabilizing holes are arranged along two sides of the main flame hole in the length direction, and the number of the flame stabilizing holes positioned on the same side of the main flame hole in the length direction is not less than one; the main fire hole and the flame stabilizing hole are punched holes in the combustor shell, and the area of the flame stabilizing hole is smaller than that of the main fire hole.

The technical scheme at least has the following beneficial effects: main flame hole and the all blowout flames in the steady flame hole of main flame hole side, because the area in steady flame hole is less than the area in main flame hole, the resistance in steady flame hole under the mutual contrast is big, flame height is low, and the resistance in main flame hole is little, flame height is high, the flame that utilizes steady flame hole to produce stably lives the flame that main flame hole produced, so the height dislocation distribution appears in the flame of every flame hole group, be favorable to stable flame, prevent from the flame, thereby every flame hole group stablizes the burning on the combustor casing, make combustor surface temperature even, and convenient for processing.

As a further improvement of the technical scheme, the corners of the main fire holes are rounded. The rectangular main fire hole is easy to process, the rounded angle can reduce the resistance of the main fire hole, and the processing is convenient.

As a further improvement of the above technical solution, the number of the flame stabilizing holes located on the same side in the length direction of the main flame holes is two. Namely, the four flame stabilizing holes are distributed on two long sides of the main fire hole, so that the flame generated by the main fire hole can be better stabilized.

As a further improvement of the technical scheme, the flame stabilizing holes are round holes, and the diameter value of each flame stabilizing hole is larger than the width value of the main fire hole. The circular flame stabilizing hole is easier to process.

As a further improvement of the above technical solution, a distance between a center of the flame stabilizing hole and a center line of the main flame hole in the length direction is 1 mm to 2 mm. The distance between the position of the flame stabilizing hole and the main fire hole is set within the distance, so that a better flame stabilizing effect can be realized.

As a further improvement of the technical scheme, the distance from the circle center of the flame stabilizing hole to the extension line of the short side of the main flame hole is less than 1.5 mm. The flame stabilizing hole is arranged beside the end part of the main flame hole and in the range, so that a better flame stabilizing effect can be realized.

As a further improvement of the technical scheme, the diameter of the flame stabilizing hole is 0.5 mm to 1.2 mm. In the range, the flame stabilizing holes can be used for stable combustion to prevent flame from leaving.

As a further improvement of the above technical solution, an ignition needle is disposed outside the burner housing, and a discharge point is disposed on the ignition needle and located above the center of the main fire hole. Ignition is made easier without producing knocking.

As a further improvement of the above technical solution, in any two adjacent fire hole groups, the distance between the center of one main fire hole and the center of the other main fire hole is 4.5 mm to 8 mm. Two adjacent fire hole groups in the distance have good fire transmission and can not be overheated.

As a further improvement of the above technical solution, the burner housing is in a hollow cylindrical shape, and the length direction of the main fire hole is parallel to the central axis of the burner housing. The structure can be conveniently matched with a cylindrical heat exchanger.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

in the drawings: 100-burner shell, 200-main fire hole, 300-flame stabilizing hole and 400-ignition needle.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1, the present invention provides a full premix burner, which comprises a burner housing 100, wherein a plurality of fire hole groups are disposed on the burner housing 100, the fire hole groups can be uniformly or irregularly arranged on the burner housing 100, each fire hole group comprises a main fire hole 200, a flame stabilizing hole 300 is arranged at one side edge of the main flame hole 200 in the length extension direction, both the main flame hole 200 and the flame stabilizing hole 300 can spray flame, since the area of the flame stabilizing hole 300 is smaller than that of the main fire hole 200, the resistance of the flame stabilizing hole 300 is large and the flame height is low compared with each other, the main fire hole 200 has small resistance and high flame height, the flame generated by the flame stabilizing hole 300 is used for stabilizing the flame generated by the main fire hole 200, thus, the flames of each fire hole group are distributed in a staggered way, which is beneficial to stabilizing the flames and preventing the flames from leaving, so that each fire hole group stably burns on the burner housing 100, making the burner surface temperature uniform.

In this embodiment, the main fire hole 200 is a long hole, and the corners of the main fire hole 200 are provided with rounded corners. The rectangular main fire hole 200 is easy to process, the rounded corners can reduce the resistance of the main fire hole 200, and the processing is convenient.

In some embodiments, primary fire holes 200 may also be kidney-shaped.

In this embodiment, four flame stabilizing holes 300 are distributed on two long sides of the main flame hole 200, and further, the flame stabilizing holes 300 are disposed on two sides of the end of the main flame hole 200, so that the flame generated by the main flame hole 200 can be stabilized better.

In this embodiment, the flame stabilizing hole 300 is a circular hole, and the diameter of the flame stabilizing hole 300 is greater than the width of the main fire hole 200. The circular flame stabilizing hole 300 is easier to process.

In some embodiments, the flame stabilizing holes 300 may be square.

According to some embodiments of the present invention, the distance between the center of the flame stabilizing hole 300 and the center line of the main flame hole 200 along the length direction is 1.5 mm. The flame stabilizing hole 300 is positioned at such a distance from the main fire hole 200 that the best flame stabilizing effect can be achieved.

In this embodiment, the distance from the center of the flame stabilizing hole 300 to the extension line of the short side of the main flame hole 200 is 1 mm. The flame stabilizing hole 300 is positioned at a distance beside the end of the main fire hole 200 to achieve the best flame stabilizing effect.

In this embodiment, the diameter of the flame stabilizing hole 300 is not less than the length of the short side of the main flame hole 200, and since the resistance of the flame stabilizing hole 300 is much greater than that of the short side of the main flame hole 200 when the diameter of the flame stabilizing hole is the same as the length of the short side, the flame stabilizing hole 300 cannot be too small for facilitating flame stabilization, and the diameter of the flame stabilizing hole 300 is 0.5 mm to 1.2 mm. Within any value of this range, the flame stabilizing holes 300 can be allowed to stably burn and prevent flame-out.

In some embodiments, the outer sidewall of the burner housing 100 is provided with two ignition needles 400, and the two ignition needles 400 are respectively located above the two flame stabilizing holes 300 of the main flame hole 200 along the long side direction, so that ignition is easier and deflagration is not generated.

In this embodiment, the center of one main fire hole 200 is spaced from the center of the other main fire hole 200 by a distance of 4.5 mm to 8 mm in any two adjacent fire hole groups. Two adjacent fire hole groups in the distance have good fire transmission and can not be overheated.

In the present embodiment, the burner housing 100 is a hollow cylinder, the length direction of the main fire hole 200 is equal to the central axis of the burner housing 100, the structure can be conveniently matched with a cylindrical heat exchanger, and the burner can also be a prism.

In some embodiments, the length direction of the main fire holes 200 may be disposed along the circumferential direction of the combustor casing 100.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A fully premixed combustor characterized by: including combustor casing (100), be provided with a plurality of fire hole groups on combustor casing (100), the fire hole group includes:

the main fire hole (200), the main fire hole (200) is a long hole;

the flame stabilizing holes (300) are arranged along two sides of the main flame hole (200) in the length direction, and the number of the flame stabilizing holes (300) positioned on the same side of the main flame hole (200) in the length direction is not less than one;

the main fire hole (200) and the flame stabilizing hole (300) are punched holes in the burner shell (100), and the area of the flame stabilizing hole (300) is smaller than that of the main fire hole (200).

2. A fully premixed burner according to claim 1, characterized in that: the corners of the fire main holes (200) are rounded corners.

3. A fully premixed burner according to claim 2, characterized in that: the number of the flame stabilizing holes (300) positioned on the same side in the length direction of the main fire holes (200) is two.

4. A fully premixed burner according to claim 3, characterized in that: the flame stabilizing holes (300) are round holes, and the diameter values of the flame stabilizing holes (300) are larger than the width values of the main flame holes (200).

5. A fully premixed burner according to claim 4, characterized in that: the distance between the circle center of the flame stabilizing hole (300) and the center line of the main flame hole (200) along the length direction is 1-2 mm.

6. A fully premixed burner according to claim 4, characterized in that: the distance from the circle center of the flame stabilizing hole (300) to the extension line of the short side of the main flame hole (200) is less than 1.5 mm.

7. A fully premixed burner according to claim 4, characterized in that: the diameter of the flame stabilizing hole (300) is 0.5 mm to 1.2 mm.

8. A fully premixed burner according to claim 4, characterized in that: an ignition needle (400) is arranged on the outer side of the burner shell (100), a discharge point is arranged on the ignition needle (400), and the discharge point is located above the center of the main fire hole (200).

9. A fully premixed burner according to claim 1, characterized in that: in any two adjacent fire hole groups, the distance between the center of one main fire hole (200) and the center of the other main fire hole (200) is 4.5 mm to 8 mm.

10. A fully premixed burner according to any of claims 1 to 9, characterized in that: the burner shell (100) is hollow and cylindrical, and the length direction of the main fire hole (200) is parallel to the central axis of the burner shell (100).