JPS6138767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burner for vaporizing and burning liquid fuel such as kerosene, and more particularly to a kerosene vaporizing burner that automatically shifts from diffuse raw combustion to vaporizing combustion.

Conventionally, in this type of kerosene vaporizing burner, the burner itself equipped with a vaporizer is rotated, fuel (kerosene) is supplied to a diffuser disposed within the burner, and the fuel is released by centrifugal force caused by the rotation of the burner itself. Atomize. Some types of fuel vaporizers spray this atomized fuel into a vaporizer heated to the vaporization temperature by heat of combustion, evaporate and gasify the atomized fuel, and burn a mixed gas mixed with air. That is, kerosene vaporizing burners that perform so-called premix combustion have been known.

By the way, in the case of a conventional kerosene vaporization burner, the vaporizer is heated in advance to the vaporization temperature by diffusion combustion, etc., thereby generating the above-mentioned mixed gas,
This mixed gas is combusted, and after the mixed gas combustion,
This combustion heat maintains the vaporizer at the vaporization temperature,
Burning continues.

However, in the case of conventional kerosene vaporizing burners, heating of the vaporizer after combustion is performed by radiation and convection, so the temperature of the vaporizer, that is, the vaporization temperature, varies depending on the amount of supplied air and the combustion state. The problem is that it is difficult to continue stable combustion because of the fluctuations.

An object of the present invention is to provide a kerosene vaporizing burner that can always perform stable combustion.

The present invention includes a vaporizing ring part in which a vaporizing chamber to which kerosene is supplied is formed, and a heat bag ring part that is formed integrally with this vaporizing ring part and continuous with the vaporizing ring part, and has a kerosene spray gap in the vaporizing ring part. A vaporizer equipped with a vaporizer is rotatably arranged in the combustion cylinder, and a vaporization chamber is communicated with an air introduction port provided at the bottom of the combustion cylinder. This kerosene vaporizing burner is fixed to a heat bag ring and has a large number of gas blowholes formed in the circumferential surface of the burner head facing the inner wall surface of the heat bag ring.

The present invention will be explained below with reference to Examples.

Referring to FIG. 1, reference numeral 1 denotes a vaporizer which is open on the upper and lower surfaces, has a stepped portion 1-a formed approximately in the center of the side wall surface, and has a flange portion 1-b provided at one end (lower end). (vaporizer). This vaporizer 1 has a vaporizing ring 1-d located below a stepped portion 1-a.
and the heat bag ring 1 located above the stepped portion 1-a.
-c.

A receiving tray 3 having a plurality of communicating holes 2 as shown in FIG. There is. The interior of the vaporizer 1 is separated using the tray 3 as a partition wall, and a vaporization chamber 9 is located below the tray 3.

4 is a rotating shaft rotated by a driving means (not shown), and a vaporizer 1 is arranged around this rotating shaft 4.
The rotating shaft 4 and the receiving tray 3 are fixed so that the rotating shaft 4 can rotate freely. A diffuser 5 that scatters kerosene using centrifugal force is integrally fixed to a rotating shaft 4 in a vaporizing chamber 9 formed inside the vaporizer 1.
When installing this diffuser 5, the horizontal extension line of the brim 6 of the diffuser 5 should be aligned with the vaporizer 1 described above.
It is desirable to set it so that it is located below the step part 1-a. Reference numeral 7 denotes an oil pipe arranged so as to look into the diffuser 5.

Reference numeral 10 designates a cup-shaped burner head having a large number of gas blowholes 12 formed on its circumferential surface (side surface) and having a mixing tube 8 housed therein as shown. The lower end of the burner head 10 is positioned on the upper surface of the tray 3 so that the mixing chamber 11 formed inside the burner head 10 and the vaporizing chamber 9 communicate only through the communication hole 2 provided in the tray 3. By connecting the burner head 10 itself to the rotating shaft 4, the burner head 10 and the saucer 3 are brought into close contact. Therefore, the burner head 10 is fixed to the vaporizer 1 via the tray 3, and the vaporizer 1
At the same time, it becomes freely rotatable around the rotating shaft 4.
With the burner head 10 disposed on the receiving tray 3, the side surface of the burner head 10, that is, the gas blowhole 12
is opposite the heat bag ring 1-c.

A spray gap C is provided between the flange portion 1-b of the vaporizer 1 and the flange portion 13-a of the pilot ring 13, and the vaporizer 1 is brought into close contact with the flange portion 13-a by spot welding or the like. Further, the ring portion 13-b in which the pilot ring 13 is erected connects the air inlet 15 of the combustion tube 14 in which the burner is housed to the primary air port 15.
-a and secondary air port 15-b. Reference numeral 16 denotes a secondary air guide ring, which is positioned so as to form gaps 18 and 19 and a secondary air chamber 17 so as not to impair the rotation of the pilot ring 13, and is tightly attached and fixed to the bottom wall 141 of the combustion tube 14. Ru.

20 is a secondary air hole, 21 is a ventilation chamber, and a ventilation means (not shown) is provided at a position below the rotation shaft 4, for example, a means for blowing air by providing a blade 22 that rotates integrally with the rotation shaft 4, or a separate means for blowing air. Air is introduced into the ventilation chamber 21 by a means for blowing air by arranging a blower. The motor housing 23 is connected to the flange portion 13 of the pilot ring 13.
This is an ignition device in which a spark portion 231 is located on the horizontal extension line of -a, and 24 indicates a combustion ring.

Next, the operation of the present invention will be explained based on the drawings.

Referring to FIG. 1, when the rotating shaft 4 starts rotating at high speed by a driving means (not shown), the vaporizer 1, burner head 10, and diffuser 5 start rotating together. On the other hand, air flowing from the ventilation chamber 21 into the primary air port 15-a, which is a part of the ventilation inlet 15, by a ventilation means (not shown) flows into the vaporization chamber 9 and the communication hole 2 provided in the receiving tray 3.
The gas passes through the mixing chamber 11 and is ejected from the gas blowhole 12. On the other hand, the secondary air port 15 from the ventilation chamber 21
-b, the air flows through the secondary air chamber 17 and blows out through the gaps 19 and 18, and also flows into the secondary air hole 2.
It erupts from 0.

At this point, if kerosene is sent from the oil pipe 7 to the surface of the rotating diffuser 5, the kerosene will be made into a thin film on the surface of the diffuser 5, and then atomized by the sharp brim 6 to form a fine powder on the inner wall of the vaporizer 1. collide with

The kerosene that has migrated to the inner wall surface of the vaporizer 1 is again turned into a thin film by centrifugal force, and gradually flows down along the inner wall surface.

When the kerosene reaches the lowest end of the vaporizer 1, it permeates into the spray gap C provided between the flange parts 1-a and 13-a, and it spreads further in the longitudinal direction (radial direction) than the flange part 1-b. The particles are atomized near the tip of the flange portion 13-a of the extended pilot ring 13 and sprayed onto the inner wall surface of the combustion tube 14. When this sprayed kerosene is ignited by the ignition device 23, the kerosene particles sprayed into the combustion tube 14 are ignited by the self-heat of the ignition device 23, and diffusion live combustion begins. The rotating vaporizer 1 is rapidly heated by this combustion heat, and the supplied fuel collides with the surface of the vaporizer or evaporates while flowing down, becoming kerosene vapor. This generated kerosene vapor is forced into the vaporization chamber 9 and the mixing chamber 11 together with the forced air introduced from the primary air port 15-a, which is a part of the air introduction port 15, and becomes a sufficiently mixed premixed gas. Fumarole 12
More gushes. This ejected premixed gas is ignited by the diffusion flame in the combustion tube 14, and the gas nozzle 12
A premixed flame F is formed.

When vaporization combustion is carried out in this manner, the heat bag ring 1-c, which is a part of the vaporizer 1, is directly exposed to the premix flame F, thereby heating the heat bag ring 1-c. That is,
As mentioned above, when the premix combustion process completely shifts, the heat bag ring 1-c is directly heated, that is, the combustion heat can be efficiently recovered to the vaporizer 1, and the gasification of kerosene and blue flame combustion are stably maintained. be able to.

FIGS. 3 to 4 show another embodiment that is a modification of the embodiment shown in FIG. 1.

In the embodiment shown in FIG. 1, the kerosene is supplied from a separately provided electromagnetic pump (not shown) or the like to the diffuser 5 via the oil pipe 7. In the embodiment shown, the rotation axis 4
The inside is formed into a pipe shape, and by using the rotational action of the rotating shaft 4, kerosene sent from a pump chamber (not shown) provided at the bottom of the rotating shaft 4 is passed through the oil pipe 25 that also serves as the rotating shaft, and the rotating shaft 4 is rotated. The oil is supplied to the diffuser 5 through a discharge port 251 formed in an upper part of the shaft oil supply pipe 25 . In addition, the shape of the vaporizer 1 is such that a vaporizing ring 1 that forms a vaporizing chamber 9 with a stepped portion 1-a as a boundary is formed.
-d may be perpendicular to the bottom surface of the combustion tube 14, or may have a shape that expands outward or contracts inward as it goes downward.

The unevenness of the stepped portion 1-a may also be reversed as shown in FIG. 4, and the diameter of the vaporizing ring 1-d may be made smaller than the diameter of the heat bag ring 1-c. Furthermore, the secondary air guide ring 16 is also the pilot ring 13.
There are no particular limitations on the shape as long as the gaps 18, 19 and the secondary air chamber 17 can be formed to the extent that rotation is not impaired. Also,
In some cases, an air stopper portion 26 may be provided in the primary air port 15-a formed as a part of the air introduction port 15 to adjust and limit the amount of air blown from the air blowing chamber 21.

In the case of the above-mentioned vaporizing burner, since the diffuser, vaporizer, etc. are rotated, the kerosene can be gasified without using any electric heat at the time of ignition, and the ignition and start-up are extremely quick. During combustion, the heat of combustion is directly collected in the vaporizer to gasify the kerosene, which not only allows stable blue flame vaporization combustion, but also
No premixed gas leaks from the gaps 18, 19 between the rotating pilot ring 13 and the stationary secondary air guide ring 16. The mixing chamber 11 and the burner head 10 are downsized and have a small heat capacity, making it easier to heat them and reducing condensation (drain) during transition to premix combustion. Furthermore, even if drainage occurs, since the burner head 10 rotates, the drainage inside the mixing chamber is discharged to the outside by centrifugal force, and red-flame combustion immediately after transition to premix combustion does not occur. Further, since the burner head 10 rotates, there are advantages such as an increase in firepower due to flame impingement and no unbalanced flame.

As explained above, the kerosene vaporizing burner according to the present invention does not require electrical preheating at all, is capable of ignition in seconds, has an extremely good start-up, and is also capable of stably continuing blue flame vaporization combustion. .

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal cross-sectional view showing an embodiment of the kerosene vaporizing burner of the present invention, and Fig. 2 is a partial vertical sectional view showing an embodiment of the kerosene vaporizing burner of the present invention, and Fig. 2 is a vaporizer that is a part of the kerosene vaporizing burner of the present invention. 3rd plan view showing the saucer
Figures 4 through 4 are longitudinal cross-sectional views of a part of the burner described as another embodiment, excluding the burner head. 1... vaporizer, 1-c... heat bag ring, 2... communicating hole, 3... saucer, 8... mixing tube, 9... vaporization chamber, 10... burner head, 12
...Gas fumarole, 13...Pilot ring, 1
5...Blower inlet.

Claims (1)

[Claims] 1. A vaporizing ring part in which a vaporizing chamber to which kerosene is supplied is formed, and a heat bag ring part formed integrally with the vaporizing ring part and continuous with the vaporizing ring part, and a kerosene spray gap is provided in the vaporizing ring part. A vaporizer provided with a vaporizer is rotatably disposed within the combustion cylinder, the vaporization chamber is communicated with an air introduction port provided at the bottom of the combustion cylinder, and a burner head equipped with a mixing pipe is connected to the vaporization chamber. A kerosene vaporizing burner, characterized in that the burner head is fixed to the heat bag ring, and a large number of gas blowholes are bored in the circumferential surface of the burner head so as to face the inner wall surface of the heat bag ring.