JPS59112108A - Evaporizing burner - Google Patents

Abstract

PURPOSE:To speed up the starting of ignition of unvaporized fuel combustion and to improve generation of fuel-air mixture gas having stable concentration, by a method wherein the supplied fuel is diffused or dispersed for plurality of times. CONSTITUTION:When the fuel is supplied through an oil fuel pipe 22 to the small size side of a fuel oil diffusing cylinder 20 which is under rotation, after the fuel is diffused along an inverted conical peripheral surface, it is dispersed in a particle manner toward the internal peripheral surface, on the forward end side of a rotary evaporizing cylinder 7 from a fuel oil dispersing end 21 at the peripheral end. The atomized fuel oil, dispersed to the internal peripheral surface of the rotary evaporizing cylinder 7, is further diffused by the rotary action of the rotary evaporizing cylinder 7 and is moved toward the open side of a base end, and finally, the fuel is sprayed from a fuel oil dispersion end 9 toward a combustion cylinder 1 to creat unvaporized fuel combustion by ignition. This causes the supplied fuel to repeat diffusing and dispersing operation many times during the spray of the fuel toward the combustion cylinder 1, and causes the fuel to be brought into a maximum atomized condition, resulting in rapid and reliable unvaporized fuel combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporizing burner capable of evaporating kerosene or other liquid fuel from an initial semi-combusted state to quickly transition to vaporizing combustion in a pre-bath state.

Kerosene and other liquid fuels are atomized by the rotating action of a rotary vaporizing cylinder that is installed inside with an integral inner cylinder, and are then mainly combusted.
Next, the liquid fuel supplied by the combustion heat is evaporated and vaporized in the air mixture passage provided between the rotary vaporizer cylinder and the cylinder, and simultaneously mixed with air to form an air mixture, which is then turned into a rotary vaporizer. In a vaporizing burner that performs vigorous jet combustion from a gas chamber provided around the base end of the cylinder, at the beginning of combustion, the liquid is atomized to the maximum extent only by the rotational action of the rotating vaporizing cylinder, and the combustion process is accelerated. In addition to quickly and accurately achieving ignition start and efficiently heating the rotary carburetor cylinder, when transitioning to vaporization combustion, the generated air-fuel mixture must be able to interact with the cooled combustion disk and inner cylinder. To prevent unburned oil from being liquefied by contact and remaining in the combustion cylinder or the outer circumferential surface of the cylinder, or from flowing down into the combustion cylinder by being transmitted through the inner cylinder, it is possible to prevent oil from being vaporized from a raw combustion state. This is extremely important not only for shortening the transition time to the combustion state and maintaining the pre-bath vaporization combustion state, but also for continuously generating mixed gas at a stable concentration and maintaining stable vaporization combustion over a long period of time. This is a serious problem.

By the way, in conventional vaporizing burners of this type, the above problems have not been reliably solved, so sometimes the ignition start of live combustion becomes defective, making it impossible to shift to vaporizing combustion, or During combustion, red phosphorus is mixed into the pre-bath due to changes in the gas mixture concentration due to the natural evaporation of unburned oil, resulting in the disadvantage that good vaporization and combustion cannot always be carried out in the pre-bath state.

Therefore, in order to solve the drawbacks of the conventional vaporizing burner of this type, the present invention aims to spray the liquid fuel supplied into the rotary vaporizing cylinder multiple times to atomize the fuel to the maximum extent possible, thereby achieving live combustion. Not only does it make the ignition start quick and accurate, shortening the transition time from a raw combustion state to a vaporization combustion state, but it also speeds up the transition from a raw combustion state to a vaporization combustion state by conducting heat from the combustion plate installed to form a gas chamber in the entire combustion tube. The cylinder is brought into a high temperature state to prevent part of the hot gas from becoming liquefied, and the unburnt oil or liquefied oil that attempts to flow down from the cold cylinder into the combustion cylinder is combusted by the rotation of the cylinder. The liquefied fuel is scattered onto the evaporation wall provided on a part of the bottom wall of the cylinder, and is quickly evaporated, thereby solving all the shortcomings of conventional evaporative burners, resulting in faster and more stable ignition of live combustion. The object of the present invention is to provide a vaporizing burner that can satisfactorily generate a mixed gas of a certain concentration and can continue positive flame vaporizing combustion for a long period of time.

The structure of the present invention will be described below with reference to various preferred embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a combustion tube having an open end and formed in an annular liquefied fuel evaporation wall 3 with a part of the bottom wall 2 extending over the bottom wall 2. Channel 4 is opened at the bottom. A ventilation chamber 5 is disposed on the bottom wall 2 side of the combustion tube 1, and the combustion tube 1 and the ventilation chamber 5 are communicated via the ventilation path 4. Reference numeral 6 denotes a rotary shaft inserted into the combustion tube 1 from the air passage 4. The distal end of the rotary shaft 6 is closed and the proximal end is open, and the circumferential wall 8 on the open proximal side is connected to the combustion tube 1. The rotary vaporizing tube 7 extends in a curved manner toward the tip side, and the rotary vaporizing tube 7 with its peripheral end serving as a fuel splashing end 9 is directly connected thereto.

Inside the rotary vaporizing cylinder I, both the distal end and the proximal end are open, and the proximal open end is bent toward the liquefied fuel evaporation wall 3, and the peripheral end is used as the liquefied fuel scattering end 11. The inner cylinder 10 is integrally attached to an appropriate number of mounting brackets 12 to form a hot gas passage 13 between the inner peripheral surface of the rotary vaporizing cylinder 7 and the outer peripheral surface of the cylinder 10. Form. Therefore, the inner cylinder 1
0 has a hollow cylindrical shape and is connected to the air passage 4 at the base end side. 14 is a rotation gap formed between the bottom wall 2 of the combustion tube 1 and the base end side of the combustion tube 10.

Inside the combustion tube 1 around the open base end side of the rotary carburetor tube 7,
A gas ejection gap 17 is provided between the rotary carburetor 7 and the combustion cylinder 1, and a combustion disk 15 is installed, the outer peripheral wall 18 of which is attached to the combustion cylinder 1 and has a large number of gas injection holes 16 perforated on its surface. A gas chamber 19 to which the discharge side of the mixed gas passage 13 is connected is formed between the combustion plate 15 and the combustion plate 15 .

At the open end of the inner cylinder 10 described above, there is a hollow inverted conical fuel diffusion cylinder 2° whose front edge is bent horizontally to the periphery to form a fuel scattering end 21. The tip opening of the oil feed pipe 22 is placed close to the inner surface of the small diameter side of the fuel diffusion tube 20 so as to be exposed thereto. 23
is a spark plug.

In the embodiment shown in FIG. 4, the proximal open side circumferential wall 8 is not expanded and extended toward the distal end of the combustion tube 1, but is bent slightly outward in a horizontal manner. At the bent position, the upper half is expanded obliquely outward, and the peripheral end thereof is formed as the fuel splashing end 26.The inclined expanded wall 25 and the majority portion are formed into a cylindrical shape. This is a modification of the rotary vaporizing tube 7' in which a mixed cylinder 24 integrally formed with the body 27 is installed. When such a rotary vaporizing tube 7' is used, the vaporization generated in the mixed gas passage 13 is By stirring and mixing the gas with the flowing forced air, it is possible to form a good mixed gas.

Next, the operation of the present invention will be explained.

In Fig. 1, if the rotating shaft 6 is started, the
Both the rotating vaporizing tube 7 and the cylinder 10 are rotated at high speed.

Therefore, if forced air is blown from the air chamber 5 through the air passage 4 and the inner cylinder 10 toward the tip side of the rotary vaporizing cylinder 7, the forced air will circulate in the mixed gas passage 13 and be directed from the discharge side. After entering the gas chamber 19, the gas is vigorously injected into the combustion tube 1 through the numerous gas ejection holes 16 and the annular gas ejection gap 17.

Therefore, if fuel is supplied from the oil feed pipe 22 to the small diameter side of the rotating fuel oil diffusion tube 20, the fuel will be diffused along the curved surface of the inverted cone, and then from the fuel scattering end 21 at the peripheral end to the rotating vaporization tube 7. It is scattered in fine particles toward the inner circumferential surface on the tip side. The atomized fuel scattered on the inner circumferential surface of the rotary vaporizer tube 7 becomes further diffused by the rotational action of the rotary vaporizer tube 7 and is transferred to the base end open side, and finally from the fuel scattering end 9 to the combustion tube 1. The fuel is ejected and ignites, causing raw combustion. Since the previously supplied fuel repeats the diffusion and scattering actions while being sprayed toward the combustion tube 1, it becomes atomized to the maximum and is burnt live quickly and accurately.

When a raw combustion flame is generated in the combustion tube 1, the combustion heat heats not only the rotary vaporization tube 7 but also the combustion disk 15, and furthermore, the combustion tube 1 is heated by the conductive heat action from the combustion disk 15.
The whole thing is in pretty bad shape.

As a result, the atomized fuel scattered from the fuel pipe 22 to the inner circumferential surface of the rotary vaporizer tube 7 from the fuel diffusion tube 20 is quickly evaporated and vaporized during diffusion transfer to the inner circumferential surface of the rotary vaporizer tube 7. The generated vaporized gas is stirred and mixed as it circulates through the supplied forced air and the mixed gas passage 13 due to the rotation of the rotary vaporizing cylinder 7 and the inner cylinder 10, and is completely mixed. The gas is injected into the gas chamber 19 as a gas, and then, while increasing the ejection pressure, it is ejected forcefully from the gas ejection hole 16 and the gas ejection gap 17. make it stop

By the way, at the start of the above-mentioned raw combustion, a part of the fuel splashed from the fuel scattering end 21 toward the inner circumferential surface of the rotary vaporizing cylinder 7 bounces back and adheres to the outer circumferential surface of the inner cylinder 10, and this reduces the amount of adhesion. As the cylinder 100 increases in size, it may flow down into the combustion tube 1 from the open side of the base end of the cylinder 100, or some of the mixed gas generated in the mixed gas passage 13 at the start of vaporization combustion may come into contact with the cold inner cylinder 10. Even if a situation occurs in which fuel is liquefied and flows down into the combustion tube 1 along the outer peripheral surface of the inner cylinder 10, the adhering fuel and liquefied fuel will reach a considerable temperature from the liquefied fuel splashing end 11 due to the rotation of the inner cylinder 10. The liquefied fuel is scattered in fine particles toward the maintained liquefied fuel evaporation wall 3,
Since it quickly evaporates and becomes vaporized gas, which is stored in the gas chamber 19, unlike a conventional vaporizing burner (unburned fuel accumulated in the combustion tube 1 evaporates at once due to natural evaporation). The mixture gas pressurized into the gas chamber 19 may be prevented from entering the pre-bath by red phosphorus produced by fumarole combustion of mixture gases with different concentrations at once. Since the entire combustion tube 1 is heated to a considerable temperature by conduction heat, it is prevented from accidentally turning into a liquefied state, and the mixed gas at a constant concentration is always stably blown out to maintain the combustion atmosphere for a long period of time. It can be vaporized and burned over a period of time.

In short, since the present invention has the above-described specific configuration, when starting the main combustion of fuel, the supplied fuel is dispersed or scattered several times to atomize it. This is because it is possible to maximize the acceleration of ignition, achieve the start of ignition quickly and accurately, and quickly transition from the main combustion state to the vaporization combustion state. The combustion tube 1 is rapidly heated by conduction heat, and unburned oil and cold inner tube 10 adhering to the inner peripheral surface of the inner tube 10 are removed.
Even if a part of the mixed gas liquefies due to contact with the cylinder 10 and flows down into the combustion cylinder 1 from the base end side of the cylinder 10, the unburned oil or liquefied fuel can be removed using the rotational action of the inner cylinder 1o. The liquefied fuel can be scattered from the liquefied fuel scattering end 11 onto the liquefied fuel evaporation wall 3 and evaporated quickly. This has the effect of allowing good positive flame vaporization combustion without contamination to be continued for a long period of time.

[Brief explanation of drawings]

The drawings show a vaporizing burner according to the present invention, in which Fig. 1 is a partially cutaway longitudinal sectional front view, Fig. 2 is an exploded perspective view of an inner cylinder and a fuel diffusion cylinder, and Fig. 3 is a partially cutaway view. FIG. 4 is an enlarged front sectional view of the main part with the section cut away, and FIG. 4 is a vertical sectional front view showing the other side of the rotary carburetor. DESCRIPTION OF SYMBOLS 1... Combustion tube, 2... Bottom wall, 3... Liquefied fuel evaporation wall, 7... Rotating vaporizing tube, 9... Fuel scattering end of rotating vaporizing tube, 10... Inner tube, 11...Liquid fuel splash end, 13
... Mixed gas passage, 15... Combustion plate, 16... Gas outlet, 17... Gas chamber, 20... Fuel diffusion cylinder,
21...Fuel scattering end of fuel diffusion tube Patent applicant Co., Ltd. Figure 1 Figure 2 36- Figure 3 Figure 4

Claims (1)

[Claims] Inside the combustion cylinder, part of the bottom wall of which is an upward annular liquefied fuel evaporation wall, there is a rotary vaporization cylinder that is closed at the tip, open at the base end, and has a fuel scattering end on the periphery of the base end, which is rotatable. A cylinder is disposed in the rotary vaporizing cylinder and has both the distal end and the proximal end open, and the proximal open end is provided with a liquefied fuel scattering end for scattering the liquefied fuel toward the liquefied fuel evaporation wall. are attached integrally to form a hot gas passage between the inner peripheral surface of the rotary carburetor and the outer peripheral surface of the cylinder, and the rotary carburetor and the rotary carburetor are installed in the combustion tube around the open base end of the rotary carburetor. A gas ejection gap is provided between the combustion tube and the combustion disk, the outer peripheral wall of which is attached to the combustion tube, and the surface of which is perforated with a large number of gas injection holes. A gas chamber is formed to which the discharge side of the cylinder is connected, and a hollow inverted cone-shaped fuel diffusion tube having a peripheral edge on the tip side formed as a fuel scattering end is fitted into the cylinder at the open end of the inner cylinder. Vaporization no guna characterized by.