JPS6038602B2 - vaporizing burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vaporizing burner that heats liquid fuel (mainly kerosene) using combustion heat, vaporizes it, and burns it.

In this type of burner, as shown in Figure 1, liquid fuel such as kerosene (hereinafter simply referred to as "combustion") supplied to the vaporizer tube A is jetted from the vaporizer tube A into the combustion chamber B and atomized. , the atomized fuel is ignited by an igniter to cause raw combustion, thereby heating the vaporization cylinder A, vaporizing the fuel in the vaporization cylinder, forming a mixture and sending it to the gas chamber C,
A configuration is known in which the fuel is injected into the combustion chamber B to be gasified and combusted to continue combustion.

In a vaporizing burner having such a configuration, in order to inject the fuel from the vaporizing tube A into the combustion chamber B to atomize it and burn it raw at the time of ignition, the opening edge A of the vaporizing tube A that communicates with the combustion chamber is required.
, an annular body E is attached to the fuel injection gap D with a fuel injection gap D, and the fuel adhering to the inner wall of the vaporization tube A (in a thin film form) is transferred from the injection gap D to the combustion chamber B by the centrifugal force caused by the high speed rotation of the vaporization tube A. The fuel passing through the ejection gap D travels along the inner wall of the annular body E and is diffused from the end green E into the combustion chamber B.

However, since the edge E of the annular body E is formed to have a constant height, the fuel (atomized state) diffused from the edge E is spread from arrow F to F. It is scattered intensively in a narrow area and stays at the base B of the combustion chamber B, and even if the transition from raw combustion to gasification combustion occurs after ignition, raw combustion (red flame combustion) will continue for a while. This continues, generating soot and resulting in soot adhering to the igniter. In particular, burner drive (
Repeating ignition) and stopping (extinguishing) will increase the amount of soot attached.
The igniter leaks and becomes unable to ignite. Therefore, this invention aims to quickly shift from raw combustion to gasification combustion after ignition, shorten red flame combustion time, achieve complete combustion, and suppress the generation of soot. It is an object of the present invention to provide a vaporizing burner in which fuel does not remain in a combustion chamber as unvaporized oil.

Next, the present invention will be explained in detail with reference to illustrated embodiments.

The basic structure of the vaporizing burner according to the embodiment of the present invention shown in FIG. 2 is the same as that of the conventional example shown in FIG. 5, a blower fan 6, a fuel supply pipe 7, etc., and a carburetor 1
A tapered fuel diffuser 11 is attached coaxially to the fuel diffuser 11. At the time of ignition, the rotation of the rotating shaft 12 driven by the motor 5 causes the vaporizing cylinder 1 and the fuel diffuser 11 to rotate at high speed.
The fuel blown from the fuel supply pipe 7 to the fuel diffuser 11 diffuses and adheres to the inner wall 13 of the vaporizer cylinder 1, flows in a thin film form on the inner wall 13 attached to a wire mesh (not shown), and reaches the open end. green 14
reach.

A current diffusion guide 8 (formed from a metal plate) is attached to the Sekiguchi edge 14 by spot welding or other means, leaving an ejection gap 81 so as to surround the open edge 14 from the outer periphery. The fuel that has reached the end green 14 flows through the ejection gap 81
, along the inner wall 82 of the diffusion guide 8, and then the edge green 83 (
The diffusion direction side) acts as a water cutting edge, scatters from the edge green 83 into the combustion chamber 2, and diffuses in an atomized state (arrow F'),
It is ignited by the discharge spark of the igniter 1g, burns raw and heats the vaporizer cylinder 1, vaporizes the fuel in the vaporizer cylinder, and mixes it with the air blown through the path of the blower fan 6 and the blower cylinder 4. The mixture becomes an air-fuel mixture, travels through the vaporization tube 1 to the gas chamber 3, and is transferred from the warm air ports 31, 31 of the gas chamber 3 to the combustion chamber 2, where it is ignited by a raw combustion flame to perform gasification and combustion. In the combustion action from raw combustion to gasification combustion, the most important action in the above embodiment is the diffusion guide body 8 that constitutes the diffusion section attached to the closed end edge 14 of the vaporizer cylinder 1. The fuel injected into the combustion chamber 2 due to the action of the diffusion guide 8 is spread evenly over almost the entire area of the combustion chamber 2, and most of the liquid fuel is burned up by raw combustion immediately after ignition.

This is because the side wall 82 (sloping outward) of the diffusion guide 8 is deeply formed, and the bridge green 83 is cut out in a step-like manner, and the height of the end green 83 is partially changed to increase the fuel diffusion range. This is due to the different structure, which allows the fuel to be transferred to the second
The combustion chamber 2 is diffused over a wide range indicated by 7' from arrow F in the figure.
Very little amount is scattered to the base 21 side of the fuel, and at the time of transition from raw combustion to gasification combustion, almost all of the unvaporized fuel is combusted due to uniform diffusion, and red flame combustion continues and remains. It is now possible to suppress the phenomenon. The diffusion guide 8 of the above-mentioned embodiment has an edge 83 cut out in a step-like manner, and as shown in FIG. 4A, it is provided with a hem portion 84 and a green portion 85 for attaching the vaporizing cylinder, and the edge green 83 is circular. The notch band is divided along the circumferential direction (in the illustrated example, it is divided into quarters in the circumferential direction), and the edge of each notch band is cut out in a step-like manner, and the cutout band is cut out one step higher along the rotation direction ( three-tier configuration)
The entire circumference of this edge green acts as a diffusion part that changes the fuel diffusion range.

Note that the pitch of the notch portions is arbitrary. Figure 4B, 4th
FIG. C, FIG. 4D, and FIG. 4E each show other examples of the diffusion guide 0, and the diffusion guide 8A in FIG. 4B is
The fuselage edge 83A is periodically cut into a corrugated or tapered shape to constitute a diffusion section in which the fuel diffusion range is different around the entire circumference, and the diffusion guide body 8B in FIG. A large number of slits 36 are provided in a staggered pattern, and the fuel is diffused from these slits and the edge 83B, but the fuel diffusion range varies depending on the installation position of the slits 86 (installed in a staggered pattern). It's a chance 8
3B and the slit 86 constitute a diffusion section. 0 In addition, the diffusion guide 8C shown in FIG. 4D has an elongated (
Slits 86C of the same size (with respect to the circumferential direction) are bored along the circumferential direction at equal intervals, and the edge green 83C is continuously cut out in the shape of a mountain, forming a trapezoidal top 83'C and a valley. Part 8
3''C are located alternately, and the slit 86C is located below one side of the sloped edge 83C between the top 83'C and the valley 83''C, and the slit 86C and the edge green 83C ( The fuel is diffused through the following diffusion sections: top 83'C, valley 83''C, sloped green 83C, and the diffusion range of the fuel varies depending on the shape and position of the slits and edge greens. ing.

Furthermore, the configuration shown in FIG. 4E is almost the same as that in FIG. 4D, and the position of the slit 86D is
The difference is that it is aligned with the top portion 83'C of , and the other configurations are the same. In addition to the illustrated embodiment, the diffusion guide described above may be of various thin constructions, but the essential function is to diffuse the fuel over a wide range within the combustion chamber and to prevent it from remaining in an unvaporized state. Good to have.

Next, in the vaporizing burner in the embodiment shown in FIG. 5, the entrance end green 14 of the vaporizing cylinder 1 is curved and extended, and the shape green 14a is shaped like a step, a wave, a chevron, or a mirror-tooth shape, similar to the above-mentioned diffusion guide. When ignited, the fuel flows out from the gap 91 provided between the ring body 9 and the closed end edge 14 of the vaporizing tube 1, and the fuel travels along the outer wall of the curved and extended entrance edge 14, and then the It is diffused throughout the combustion chamber 2 from the edge 14a,
Instead of using a diffusion guide separate from the vaporization tube, the closed edge of the vaporization tube is an extension, and the edge itself has the structure and function as a diffusion section. As described above, according to the present invention, the liquid fuel that has been sprayed into the combustion chamber from the high-speed rotating vaporization tube is ignited and burnt live, and the combustion heat of this raw combustion heats the vaporization tube and the inside of the vaporization tube is heated. In a vaporization burner that vaporizes and gasifies and burns liquid fuel, a diffusion section with different diffusion ranges of liquid fuel is provided at the open edge of the vaporization cylinder that is compatible with the combustion chamber, thereby spreading the liquid fuel into the combustion chamber over a wide range. Since it is configured to diffuse, unvaporized liquid fuel is diffused into the combustion chamber in the form of mist by the action of the diffusion section.
It is ignited by an ignition means such as an igniter, and undergoes live combustion in the state of a diffusion flame, and then transitions to gasification combustion.During this period, the unvaporized fuel is completely burned by average diffusion over a wide range, and it burns at the base of the combustion chamber. Therefore, red-flame combustion due to live combustion will be completed in a short time as the heating vaporization action of the vaporizing cylinder progresses, and the generation of soot due to red-flame hot phosphorus can be kept to a minimum as much as possible. It is something.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional example, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is an enlarged sectional view of the diffusion guide installation part, and Figs. 4A to 48 are and FIG. 5 are perspective views showing embodiments of the diffusion guide, respectively, and FIG. 5 is a sectional view of main parts showing another embodiment of the present invention. 1... Carburizer cylinder, 2... Combustion chamber, 14.
...Sekiguchi edge of vaporizer cylinder, 83, 83A, 83B,
83C...Green end of diffusion guide (diffusion part), 86,8
6C, 86D...Slit (diffusion part). Figure 1 Figure 3 Figure 5 Figure 2 Figure 4A Figure 4B Figure 4C Figure 4D Figure 4E

Claims (1)

[Claims] 1. The liquid fuel sprayed into the combustion chamber from the high-speed rotating vaporization cylinder is ignited to cause raw combustion, and the combustion heat of this raw combustion heats the vaporization cylinder to vaporize the liquid fuel in the vaporization cylinder, resulting in gasification and combustion. What is claimed is: 1. A vaporizing burner, characterized in that a diffusion section having different diffusion ranges for liquid fuel is provided at the opening edge of a vaporizing cylinder communicating with a combustion chamber.