JPH03230006A - Gas burner - Google Patents

Abstract

PURPOSE:To shorten distances from gas outlets and an air outlets to a combustion chamber, which is required to stabilize the combustion, by a method wherein air paths leading from air feed nozzles to air outlets are located at non-intersecting positions against the axial line of a burner head and twisted in the same direction. CONSTITUTION:Two or more air feed nozzles 17 are arranged along a circle line on the base plate of a head main body 13b of a burner head 13 and two or more air outlets 16 are arranged along a circle line, having a smaller diameter than that of the air feed nozzles 17, on the top face of the over plate. Air paths 18, leading from the air feed nozzles 17 to the air outlets 16, are located at non-intersecting positions against the axial line O and twisted clockwise as seen from the top face. Gas flows toward the tip of a gas pipe 52 and spouts from gas outlets 55 into a combustion cone 59. Air flows toward the tip of a draft tube 51 and spouts into the combustion cone 59 through the air paths 18. Air also spouts from air nozzles 60 into the combustion cone 59. As air develops eddy currents in the combustion cone 59, mixing of the gas and air is stimulated by the eddy currents. Therefore, combustion is stabilized even in the combustion chamber which is located within a short distance from the gas outlets 55 and the air outlets 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a diffusion gas burner for industrial high-load combustion.

[Prior Art] Conventionally, in this type of gas burner, as shown in FIG. It flows from the right end side) to the tip side. A gas pipe 52, which is a gas passage, is provided in the center of the draft tube 51, and the gas is directed to its base end (the right end in FIG. 4).
It flows from the tip to the tip.

A combustion head 53 in the shape of a cylinder with a lid is connected to the tip of the gas pipe 52 within the draft tube 51 . The combustion head 53 includes a cylindrical connecting portion (gas inlet) 53a having an inner circumference approximately the same diameter as the outer circumference at the tip of the gas pipe 52;
The combustion head main body 53b has a larger diameter than the connecting portion 53a.

The inside of this combustion head main body 53b is a cavity 54 that communicates with the gas pipe 52 via a connecting portion 53a. A plurality of waste outlets 55 arranged concentrically are formed on the outer periphery of the top end surface of the lid of the combustion head main body 53b, and the gas outlets 55 are formed on the front end surface of the lid of the combustion head main body 53b.
A plurality of air outlets 56 are formed concentrically on the inner side. Further, an air introduction port 57 is formed at a position corresponding to the air outlet 56 on the outer circumference of the base end surface of the combustion head main body 53b, and an air passage 58 is formed between the air introduction port 57 and the air outlet 56. ing. In other words, the center line of the air passage 58 is arranged parallel to the axis 0 of the combustion head 53 so as to be parallel to the direction in which gas flows within the combustion head 53.

The combustion head body 5 is located within the draft tube 51.
A combustion tube 59 is provided on the periphery of the tip of the lid portion 3b, the diameter of which increases toward the tip. A plurality of air holes 60 are obliquely formed in the combustion tube 59 through which air in the draft tube 51 passes.

When using such a gas burner, the gas is
Air flows from the proximal end of the draft tube 51 toward the distal end, and is ejected from the gas outlet 55 into the combustion tube 59. At the same time, air flows from the proximal end of the draft tube 51 toward the distal end, and flows from the air inlet 57 to the air passage. 58 and is ejected from the air outlet 56 into the combustion cylinder 59. Furthermore, the air flowing inside the draft tube 51 also flows from the air hole 60 of the combustion tube 59 to the combustion tube 59.
Squirt inside. These gases and air are mixed in the combustion tube 59.

[Problems to be Solved by the Invention] However, in the conventional gas burner, the air passage 58 is parallel to the direction in which the gas flows in the combustion head 53, so that the air and gas each form a laminar flow. It was difficult to mix. For this reason, in order to stabilize combustion, it is necessary to provide a combustion chamber at the tip of the draft tube 51 with a long distance from the gas outlet 55 and the air outlet 56, making it impossible to achieve sufficiently high-load combustion.

Therefore, the present invention provides a gas burner that induces vortex mixing of gas and air, achieves a partial premixing effect, and shortens the distance from the gas outlet and air outlet necessary to stabilize combustion. is intended to provide.

[Means for Solving the Problems] In order to solve the above object, the present invention has a gas inlet on the base end surface of the combustion head in the form of a cylinder with a lid, and a plurality of gas inlet ports on the end surface of the lid portion of the combustion head. In a gas burner in which gas outlets are arranged concentrically, a plurality of air inlets are formed concentrically on the base end surface of the combustion head, and a plurality of air inlets are formed concentrically on the distal end surface of the lid, and the air inlet is formed concentrically with a diameter smaller than the concentric circle of the air inlet. A plurality of air outlets are formed in the air outlet, and each air passage connecting each air inlet and each air outlet is arranged so that its center line is located at a position that does not intersect with the axis of the combustion head, and the lid part The gist is to arrange the screws in a twisted manner in the same direction of right or left rotation when viewed from the distal end surface.

[Operation] When the gas burner of the present invention is used, gas is ejected from the gas outlet, and air is ejected from the air outlet through the air passage from the air inlet. Since the air flows in a spiral, it induces eddy mixing of the gas and air.

[Embodiment 1] Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 to 3, only the differences from the conventional example.

As shown in FIGS. 2 and 3, a plurality of air inlet ports 17 are formed concentrically on the base end surface of the head body 13b of the combustion head 13, and a diameter smaller than the concentric circle of the air inlet ports 17 is formed on the top end surface of the lid. A plurality of air outlets 16 are formed on concentric circles. Each air passage 18 connecting each air inlet 17 and each air outlet 16 has its center line P aligned with the combustion head 13.
The cover is twisted in the right turning direction when viewed from the top end surface of the lid, so as not to intersect with the axis O of the cover.

When using such a gas burner, the gas is
Air flows from the proximal end of the draft tube 51 toward the distal end, and is ejected from the gas outlet 55 into the combustion tube 59. At the same time, air flows from the proximal end of the draft tube 51 toward the distal end, and flows from the air inlet 17 to the air passage. 18 and is ejected from the air outlet 16 into the combustion cylinder 59. Furthermore, the air flowing inside the draft tube 51 also flows from the air hole 60 of the combustion tube 59 to the combustion tube 59.
Squirt inside. These gases and air are mixed in the combustion tube 59.

In this embodiment, the air ejected from the air passage 18 flows in a spiral shape inside the combustion tube 59, thereby inducing vortex mixing of gas and air within the combustion tube 59, achieving a partial premixing effect. However, even if the combustion chamber is located at a short distance from the gas outlet 55 and the air outlet 16, combustion can be stabilized. Therefore, the gas burner of this embodiment can perform high-load combustion.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the center line P of each air passage 18 is located at a position that does not intersect with the axis 0 of the combustion head 13, and It may be twisted in the left turning direction when viewed.

[Effects of the Invention] As detailed above, in the present invention, vortex mixing of gas and air is induced, a partial premixing effect is achieved, and the air flow from the gas outlet and air outlet necessary for stabilizing combustion is achieved. This has the excellent effect of shortening the distance.

[Brief explanation of drawings]

1 to 3 show a gas burner according to an embodiment of the present invention,
Figure 1 is a perspective view showing the combustion head of the gas burner, Figure 2 is a front view of the gas burner, and Figure 3 is A-A in Figure 2.
4 and 5 show a conventional gas burner, FIG. 4 is a front view of the same gas burner, and FIG.
It is a sectional view taken along the B line. Combustion head 13, air outlet 16, air inlet 17, air passage 18, gas outlet 55, connection part (gas inlet) 53a
, axis center line 0. Center line P.

Claims (1)

[Claims] 1. The combustion head (13) in the shape of a cylinder with a lid has a gas inlet (53a) on the base end surface, and the combustion head (13) has a plurality of gas outlets (55) on the distal end surface of the lid. ) arranged concentrically, the combustion head (13) has an air inlet (17) on its base end surface.
) are formed on concentric circles, and a plurality of air outlets (16) are formed on a concentric circle with a smaller diameter than the concentric circle of the air inlet (17) on the distal end surface of the lid.
) and each air outlet (16).
) whose center line (P) is the axial center line of the combustion head (13) (
A gas burner characterized in that the gas burner is twisted in the same direction of rightward rotation or leftward rotation when viewed from the tip end surface of the lid and is located at a non-intersecting position with respect to O).