JPS6034894Y2 - porous oil burner - Google Patents

Description

[Detailed description of the invention] The present invention relates to a high-pressure air spray type internal mixing or intermediate mixing porous oil burner in which oil is atomized by an atomizing agent to form a combustion flame, and its purpose is to may make it possible to change the shape and direction of the combustion flame.

In a conventional porous oil burner of this kind using an internal mixing or intermediate mixing method (in the text below, only the internal mixing method will be explained) using a two-fluid injection pipe, as shown in Fig. 1 A9, the tip of the injection pipe a is Nozzle tip b provided in
In general, the injection holes C of the same diameter are arranged evenly on the same circumference, and although not shown, there are also injection holes C arranged in a staggered manner or two holes adjacent to each other, but in any case. However, the idea was to form the flame into a uniform shape in the circumferential direction.

In the case of conventional devices like this, the length of the flame could be easily adjusted by changing the injection angle, but the direction of the flame could not be changed easily, and in order to change it, the angle of the entire air register had to be changed. Must be.

By the way, for example, in a slab heating furnace, there are cases where the slab is heated rapidly and cases where it is heated slowly, and it is necessary to choose between heating by direct flame and heating by radiant heat. If the conventional oil burner described above is used in the furnace, the angle of the entire air register must be changed as described above, which is very inconvenient.

Therefore, the present invention was developed to solve these problems, and the injection hole formed in the nozzle tip is divided into a large diameter injection hole and a small diameter injection hole, and the injection holes are formed eccentrically at opposite positions. In addition, the injection pipe is rotatably provided with respect to the air register at its axis, and an embodiment thereof will be described in detail below with reference to FIG. 2 and subsequent figures.

In FIG. 2, 1 is a burner main body, and the burner main body 1 includes an injection pipe 3 having a nozzle tip 2 at its tip, an oil supply port 4 at its base end, and an atomizing agent supply such as atomized steam. Mouth 5
The oil supplied within the nozzle tip 2 is atomized by an atomizing agent.

Further, the injection pipe 3 is rotatably supported by a rotary joint 6 interposed at its base end and with a support 8 within an air register 7, and furthermore, the injection pipe 3 is It is designed so that atomized oil can be injected.

The air register 7 also has an air supply port 10 and an air hole 11 formed in the support 8, and the injection hole 9 of the nozzle chip 2 is provided in the furnace interior 13 formed by the furnace wall 12.
Along with the injection of atomized oil, air is also injected.

The injection hole 9 of the nozzle tip 2 is shown in FIG. 3A.

As shown in the figure, the large-diameter injection holes 9a group forming the main flame and the small-diameter injection holes 9b group forming the auxiliary flames are separated from each other, eccentrically located at opposite positions in the circumferential direction from the axis, and arranged at arbitrary positions. It is formed with a spray angle θ.

Here, if the outer diameter of the nozzle tip 2 is D, then the eccentric dimension of the large diameter injection hole 9a is 1□ and the eccentric dimension of the small diameter injection hole 9b is 1□
may be set in the range of 1/6 to 1/3 of the outer diameter depending on the applicable furnace.

On the other hand, the diameter d□ of the large-diameter injection hole 9a and the diameter d of the small-diameter injection hole 9b
2 is set according to the applicable furnace so that the total cross-sectional area of both holes 9a and 9b is approximately equal to the total cross-sectional area of the conventional one.

The injection angle θ may be set arbitrarily in the range of 0 to 30° depending on the applicable furnace.

In the figure, 14 is an oil passage and 15 is an atomizer passage, and the supplied oil is atomized with an atomizer and is injected from the injection holes 9a and 9b.

The oil burner of the present invention is constructed as described above, and an example of its use in a slab heating furnace is shown in Fig. 4A.

It shows in the mouth.

That is, the heating furnace 16 is equipped with the burner body 1, and the inlet side A
A slab 17 is inserted toward the extraction side B and is heated by the combustion flame 18 of the burner body 1.

First, in FIG. At the same time, the main flame 18a formed by the large-diameter injection hole 9a is directed downward to directly hit the slab 17 to rapidly heat it, and the auxiliary flame 18b formed by the small-diameter injection hole 9b is directed upward to heat the inside of the furnace 16 with its radiant heat. Heat.

On the other hand, when heating slowly without rapid heating, set the large diameter injection hole 9a to the upper side to reduce the temperature to 0.
As shown in the above, the main flame 18a is placed upward, and the auxiliary flame 18b is
is formed below, and the slab 17 can be heated slowly by its radiant heat without being directly heated by the flame 18.

In the embodiment, the large diameter injection hole 9a and the small diameter injection hole 9b are as follows.
There should be three of each, but one is fine (up to four is appropriate, but it is of course possible to use more as long as the intended purpose can be achieved).

In short, the oil burner of this invention divides the injection hole of the nozzle tip provided at the tip of the injection pipe into a large-diameter injection hole that forms the main flame and a small-diameter injection hole that forms the auxiliary flame, and the two are eccentrically placed in opposite positions. The shape of the combustion flame can be changed by simply rotating the injection pipe without changing the angle of the entire air register. The flame shape and direction can be extremely easily selected depending on the heating conditions, such as direct heating or heating by radiant heat.

Furthermore, by making the injection holes porous to form an auxiliary flame, it is possible to increase the heating efficiency of the space inside the furnace, which is a very useful idea.

[Brief explanation of the drawing]

Figure 1 (A) 9 is a sectional view and a front view of the tip of the conventional injection tube, Figure 2 is a vertical side view showing an embodiment of the present invention, and Figure 3 (A) 9 is a sectional view and front view of the tip of the same injection tube. Figure 4A9 is an explanatory view of the mode of use. 1 is the burner body, 2 is the nozzle tip, 3 is the injection pipe, 7 is the air register, 9 is the injection hole, 9a is the large diameter injection hole, 9b is the small diameter injection hole, 19 is the combustion flame, 19a is the main flame, 19b
is a secondary flame.

Claims (1)

[Scope of utility model registration request] The injection hole of the nozzle tip provided at the tip of the injection tube is divided into a large diameter injection hole that forms a main flame and a small diameter injection hole that forms an auxiliary flame, and the large diameter injection hole is eccentric to one side from the axis of the nozzle tip. At the same time, the small-diameter injection hole is eccentrically positioned opposite to the large-diameter injection hole in the circumferential direction, and both injection holes are opened at an arbitrary injection angle, and the injection pipe is rotatably provided with respect to the air register. A porous oil burner characterized in that the shape and direction of a combustion flame can be changed according to the rotation angle of the porous oil burner.