JP2015194305A - burner nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner nozzle capable of further stably jetting fuel containing gas, even if the supply amount or jet amount of the fuel containing gas, and a layout or number of holes for jetting the fuel containing gas are changed.SOLUTION: An air jet hole 50 is formed so as to communicate with an air flow path 61 for jetting air passing through the inside of an inner side wall 10. A plurality of fuel containing gas jet holes 51 are disposed so as to surround the air jet hole 50, and formed so as to communicate with a spare chamber 60 for jetting fuel containing gas passing through the spare chamber 60. A fuel containing gas supply hole 52 is provided so as to make the fuel containing gas supplied into the spare chamber 60 advance while swiveling around the inner side wall 10 to reach the fuel containing gas jet holes 51.

Description

  The present invention relates to a burner nozzle that injects and burns a fuel-containing gas such as a premixed gas or a fuel gas in the main axis direction.

  A burner nozzle in which an air flow path is formed in the center and a premixed gas chamber is formed so as to surround the air flow path is used for a gas stand (see Patent Document 1 below) or for reforming a fuel cell. It is used in various scenes, such as in places where gas is heated.

  The burner nozzle described in the following Patent Document 1 includes an annular burner body, and the burner body includes an annular bottom wall and a top wall, an outer peripheral wall connecting the outer periphery of the bottom wall and the top wall, and their And an inner peripheral side wall connecting the inner peripheral portions. The bottom wall, the top wall, the outer peripheral side wall, and the inner peripheral side wall define an annular inner space through which a premixed gas (a mixture of fuel gas such as city gas and LP gas with primary air) is supplied. The outer peripheral side wall and the inner peripheral side wall extend vertically upward from the bottom wall, a plurality of first flame holes are provided at the upper end portion of the outer peripheral side wall, and a plurality of second flame holes are provided on the top wall. As shown in FIG. 1 to FIG. 3 of Patent Document 1 below, a premixed gas is supplied to the annular internal space via a mixing tube. The mixing tube is arranged along a radial extension towards the center of the burner body.

JP 2001-50513 A

  By the way, while maintaining the basic structure of the burner nozzle that injects and burns the premixed gas in the main axis direction, the supply amount and injection amount of the premixed gas and the arrangement and number of holes for injecting the premixed gas are changed. Under certain conditions, the premixed gas injection may not be stable. The amount of premixed gas supplied and injected, and the number and arrangement of holes for injecting the premixed gas vary depending on the environment and application where the burner nozzle is installed. Even if it makes it, it is necessary to inject the premixed gas stably.

  The present invention has been made in view of such problems, and its purpose is to supply and inject fuel-containing gas such as premixed gas and fuel gas, and the number and arrangement of holes for injecting fuel-containing gas. An object of the present invention is to provide a burner nozzle capable of injecting a fuel-containing gas more stably even when the value is changed.

  In order to solve the above problems, a burner nozzle according to the present invention is a burner nozzle that injects and burns fuel-containing gas in the direction of the main axis, and is a side wall that defines a preliminary chamber through which the fuel-containing gas passes, A side wall defining a spare chamber between the inner side wall disposed inside along the direction and the inner side wall, the outer side wall disposed outside the inner side wall along the main axis direction, and the spare chamber A first end wall that connects one end side of the inner side wall and one end side of the outer side wall, an end wall that defines a spare chamber, and the other end side of the inner side wall and the outer side wall A second end wall connecting the other end of the second end wall. An air injection hole and a fuel-containing gas injection hole are provided in the first end wall, and a fuel-containing gas supply hole is provided in the outer side wall or the second end wall. The air injection hole is formed in communication with the air flow path defined on the inside of the inner side wall so that air passing through the inner side of the inner side wall is injected. A plurality of fuel-containing gas injection holes are arranged so as to surround the air injection holes, and are formed in communication with the preliminary chamber so that the fuel-containing gas passing through the preliminary chamber is injected. The fuel-containing gas supply hole is provided so that the fuel-containing gas supplied into the preliminary chamber advances while turning around the inner side wall and reaches the fuel-containing gas injection hole.

  According to the burner nozzle of the present invention, the fuel-containing gas supply hole is provided so that the fuel-containing gas supplied into the spare chamber advances while turning around the inner side wall and reaches the fuel-containing gas injection hole. The fuel-containing gas supplied into the spare chamber is directed to the fuel-containing gas injection hole while swirling around the inner side wall. Therefore, the fuel-containing gas is uniformly supplied to each of the plurality of fuel-containing gas injection holes arranged so as to surround the air injection holes, and the fuel-containing gas can be stably injected.

  In the burner nozzle according to the present invention, it is also preferable that the fuel-containing gas supply hole is arranged so that the center axis thereof is offset outward from the center axis of the inner side wall.

  In this preferred embodiment, the fuel-containing gas supply holes are offset outwardly with respect to the inner side wall, so that all of the fuel-containing gas supplied from the fuel-containing gas supply holes does not interfere with the inner side wall and swirls. Form. Therefore, the fuel-containing gas is supplied to each of the plurality of fuel-containing gas injection holes arranged so as to surround the air injection holes in a state in which the bias is further reduced, and stable injection of the fuel-containing gas becomes possible.

  In the burner nozzle according to the present invention, it is also preferable that the fuel-containing gas supply hole is provided so that the central axis thereof is in a twisted position with respect to the main axis and inclined toward the first end wall.

  In this preferred embodiment, the fuel-containing gas supply hole is provided so as to incline in the direction of the first end wall while turning sideways with respect to the main shaft, so that the fuel-containing gas supplied from the fuel-containing gas supply hole is swung in the flow Ingredients can be more reliably applied.

  According to the present invention, the fuel-containing gas can be injected more stably even if the supply amount and injection amount of the fuel-containing gas and the arrangement and number of holes for injecting the fuel-containing gas are changed. A burner nozzle can be provided.

It is a perspective view which shows the external appearance of the burner nozzle which concerns on embodiment of this invention. It is a figure which shows the burner nozzle which concerns on embodiment of this invention, Comprising: (A) is a top view, (B) is a cross-sectional view, (C) is a figure which shows a longitudinal cross-sectional view. It is a figure which shows the modification of the burner nozzle shown in FIG.1 and FIG.2, Comprising: (A) is a top view, (B) is a cross-sectional view, (C) is a figure which shows a longitudinal cross-sectional view. It is a fragmentary longitudinal cross-sectional view for demonstrating the inclination of the fuel containing gas supply hole shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate understanding, the same components are denoted by the same reference numerals as much as possible in the drawings, and redundant description is omitted.

  As shown in FIG. 1, the burner nozzle BN is a burner nozzle that injects and burns a premixed gas in the main axis direction (y-axis direction). In FIG. 1, the main axis direction of the burner nozzle BN is set as the y-axis direction, and the x-axis and the z-axis are set so as to configure orthogonal coordinates with reference to the y-axis. The same applies to FIG. The burner nozzle BN includes an inner side wall 10, an outer side wall 20, a first end wall 30, and a second end wall 40.

  The inner side wall 10 is a side wall that defines a preliminary chamber 60 (see FIG. 2) through which the premixed gas passes, and is disposed on the inner side along the main axis direction (y-axis direction). The inner side wall 10 is configured to have a cylindrical shape.

  The outer side wall 20 is a side wall that defines the spare chamber 60 between the inner side wall 10 and is disposed outside the inner side wall 10 along the main axis direction (y-axis direction). The outer side wall 20 is configured to have a cylindrical shape.

  The first end wall 30 is an end wall that defines the preliminary chamber 60, and connects one end side of the inner side wall 10 and one end side of the outer side wall 20. The first end wall 30 has a substantially disc shape, and the outer periphery thereof is closely fixed to the outer periphery of one end side of the outer side wall 20. An air injection hole 50 is provided in the central portion of the first end wall 30. The air injection hole 50 has a substantially circular shape, and one end side of the inner side wall 10 is closely fixed to the outer periphery of the air injection hole 50 for wearing.

  The second end wall 40 is an end wall that defines the spare chamber 60 and connects the other end side of the inner side wall 10 and the other end side of the outer side wall 20. The second end wall 40 has a substantially disk shape, and the outer periphery thereof is closely fixed to the outer periphery of one end side of the outer side wall 20.

  The first end wall 30 is provided with an air injection hole 50 and a fuel-containing gas injection hole 51. In the case of this embodiment, one air injection hole 50 is provided in the central portion. Eight fuel-containing gas injection holes 51 are provided so as to surround the air injection holes 50. A fuel-containing gas supply hole 52 is provided in the outer side wall 20.

  Next, description will be made with reference to FIG. As shown in FIG. 2A, the fuel-containing gas injection holes 51 surround the air injection holes 50 and are arranged at equal intervals. The fuel-containing gas injection hole 51 is formed in communication with the preliminary chamber 60 so that the premixed gas passing through the preliminary chamber 60 is injected (see FIG. 2C). The air injection hole 50 is formed so that the inner side wall 10 communicates with an air flow path 61 defined on the inner side so that air passing through the inner side wall 10 is injected ((B) in FIG. 2). reference).

  As shown in FIGS. 2B and 2C, the fuel-containing gas supply hole 52 is formed so as to penetrate the outer side wall 20. The fuel-containing gas supply holes 52 are offset outwardly with respect to the inner side wall 10 so that all of the premixed gas supplied to the inside through the holes does not interfere with the inner side wall 10. . More specifically, as shown in FIG. 2B, the fuel-containing gas supply hole 52 faces outward so that the inner side wall 10 does not exist on the extension line of the central axis A of the fuel-containing gas supply hole 52. Oriented.

  By forming the fuel-containing gas supply hole 52 in this way, the premixed gas supplied into the preliminary chamber 60 advances while turning around the inner side wall 10 and reaches the fuel-containing gas injection hole 51. Has been. However, the premixed gas supplied from the fuel-containing gas supply hole 52 does not interfere with the inner side wall 10 at all, and the uniformity of the premixed gas supplied to the eight fuel-containing gas injection holes 51 is a technical problem. A certain amount of interference is acceptable if it is ensured at a certain level. From this point of view, the embodiment of the present invention is limited to a form that does not interfere with the inner side wall 10 when the outer periphery of the fuel-containing gas supply hole 52 is projected in the direction of the central axis A as in this embodiment. The embodiment of the present invention may include a mode in which a part of the fuel-containing gas supply hole 52 interferes with the inner side wall 10 when the outer periphery of the fuel-containing gas supply hole 52 is projected in the direction of the central axis A.

  Next, a modification of the present embodiment will be described with reference to FIG. Although the fuel-containing gas supply hole 52 of the present embodiment described above is provided in the outer side wall 20, the fuel-containing gas supply hole 52 of this modification is provided in the second end wall 40. Further, the fuel-containing gas supply hole 52 </ b> A is provided such that its central axis B intersects with the main axis (y-axis) and is inclined toward the first end wall 30.

  Specifically, as shown in FIG. 4, if the direction from the second end wall 40 toward the first end wall 30 is defined as upward, the second end wall so that the fuel-containing gas supply hole 52A is obliquely upward. 40. If the fuel-containing gas supply hole 52A is formed so that the central axis of the fuel-containing gas supply hole 52A is not parallel to the main axis (y-axis) but the main axis (y-axis), some The premixed gas is supplied only to the fuel-containing gas injection hole 51, and the uniformity of combustion cannot be ensured. Therefore, the fuel-containing gas supply hole 52 </ b> A is swung around the inner side wall 10 by providing the center axis B so as to be in a twisted position with respect to the main axis (y-axis) and tilting toward the first end wall 30. Thus, the premixed gas can be supplied, and the premixed gas can be uniformly supplied to all the fuel-containing gas injection holes 51.

  In the present embodiment and the modification, the fuel-containing gas injection holes 51 are arranged at equal intervals so as to form a single ring, but the arrangement of the fuel-containing gas injection holes 51 is not limited to this. . According to the combustion performance required for the burner nozzle BN, the fuel-containing gas injection holes 51 are arranged unevenly, or the fuel-containing gas injection holes 51 are formed in a plurality of double, triple or more circular rings. Or may be arranged. In this case, it is also a preferable aspect to provide a plurality of preliminary chambers 60 as necessary.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

BN: Burner nozzle 10: Inner side wall 20: Outer side wall 30: First end wall 40: Second end wall 50: Air injection hole 51: Fuel-containing gas injection hole 52: Fuel-containing gas supply hole 60: Preliminary chamber 61: Air Flow path

Claims (3)

In a burner nozzle that injects and burns fuel-containing gas such as premixed gas and fuel gas in the main axis direction,
A side wall defining a preliminary chamber through which the fuel-containing gas passes, and an inner side wall disposed inside along the main axis direction;
A side wall defining the preliminary chamber between the inner side wall and an outer side wall disposed outside the inner side wall along the main axis direction;
An end wall defining the preliminary chamber, the first end wall connecting one end side of the inner side wall and one end side of the outer side wall;
An end wall defining the preliminary chamber, the second end wall connecting the other end side of the inner side wall and the other end side of the outer side wall; and
The first end wall is provided with an air injection hole and a fuel-containing gas injection hole, and the outer side wall or the second end wall is provided with a fuel-containing gas supply hole,
The air injection hole is formed in communication with an air flow path defined on the inner side wall so that air passing through the inner side of the inner side wall is injected,
A plurality of the fuel-containing gas injection holes are disposed so as to surround the air injection holes, and are formed in communication with the preliminary chamber so that the fuel-containing gas passing through the preliminary chamber is injected.
The fuel-containing gas supply hole is provided so that the fuel-containing gas supplied into the preliminary chamber advances while turning around the inner side wall and reaches the fuel-containing gas injection hole. nozzle.   2. The burner nozzle according to claim 1, wherein a central axis of the fuel-containing gas supply hole is offset outwardly with respect to a central axis of the inner side wall.   3. The burner according to claim 2, wherein the fuel-containing gas supply hole is provided such that a central axis thereof is in a position twisted with respect to the main shaft and is inclined toward the first end wall. nozzle.

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