JPH0373766B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a method for rotating an outer mantle and an inner mantle together,
Alternatively, even when the outer mantle is fixed and the inner mantle is rotated, a portion of the high temperature mixed gas generated in the mixed gas passage formed between the outer mantle and the inner mantle is transferred to the gas circulation passage. The present invention relates to a vaporizing burner that can easily promote the evaporation of fuel by allowing it to flow back along the direction of the fuel and making it come into contact with diffused fuel.

Prior Art Conventionally, an outer mantle and an inner mantle, each having an open base end, are directly connected to a rotating shaft inserted into a combustion cylinder, with a space between the mantles to form a mixed gas passage, and the inner circumferential surface of the mantle is The fuel is evaporated and vaporized by the heating action of the live combustion flame, and the generated mixed gas is agitated and mixed with the combustion air, while the diffusion and migration of the fuel along the flow direction and the flow direction of the combustion air are made to flow in parallel. A vaporizing burner that performs vaporization combustion after the
It is described in Japanese Patent No. 45882 and is well known.

Further, the outer mantle is fixed in the combustion cylinder, and the inner mantle is rotatable and positioned within the mantle, and a mixed gas passage is provided between the mantles to control the diffusion and transfer direction of the fuel that diffuses and transfers along the inner peripheral surface of the mantle. There is also a vaporization burner that evaporates and vaporizes fuel by the heating action of a live combustion flame while co-currently flowing the air and combustion air, and then stirs and mixes the generated mixed gas with the combustion air before vaporizing and burning it. It is well known, as it was described in, for example, Japanese Utility Model Publication No. 60-9543 before the application was filed.

In addition, by making the direction of diffusion of fuel oil and the direction of flow of combustion air flow countercurrently, the evaporation of fuel is accelerated, and at the same time, the agitation and mixing of the generated vaporized gas and combustion air is improved. The combustion device is also well known, having been described in, for example, Japanese Patent Publication No. 11762/1983 prior to the filing of this application.

Problems to be Solved by the Invention By the way, in the above-mentioned well-known vaporizing burners in which the jacket is rotatable or fixed, the direction of diffusion and transfer of fuel and the direction of flow of combustion air may be made to flow in parallel. The evaporated vaporized gas generated by countercurrent flow and the combustion air are stirred and mixed, but in both cases, the generated evaporated vaporized gas is not stagnated in the air mixture passage and flows in one direction. Since the evaporated gas and the combustion air were only agitated and mixed in the process of being blown out, the agitation and mixing of the evaporated vaporized gas and the combustion air could not be further promoted. Due to its composition, it is not possible to always supply a constant amount of combustion air, making it impossible to obtain a homogeneous gas mixture, and as a result, stable vaporization combustion cannot be maintained over a long period of time. Needless to say, since the fuel is not preheated by the high-temperature mixed gas generated in the mixed gas passage, there are problems such as evaporation and vaporization not being completed in a short time.

Therefore, in the first aspect of the present invention, even if the outer mantle and the inner mantle are both rotated integrally, or the outer mantle is fixed and the inner mantle is rotatable, it is possible to prevent the air from flowing out from around the inner mantle. Swirling combustion air is directly injected across the gas passage toward the fuel evaporation part of the mantle, causing the fuel that diffuses along the inner circumferential surface of the mantle to be swirled and retained by the swirling combustion air, and at the same time suppressing its flow rate as much as possible. Not only can diffusion be promoted to further promote the generation of evaporated vaporized gas, but the generated evaporated vaporized gas can be temporarily retained in the mixed gas passage, and then be sprayed against the fuel evaporation section and diffused into the surroundings. By stirring and mixing with the combustion air that swirls and scatters in a shape, the stirring and mixing of the vaporized gas and the combustion air is further promoted to obtain a complete mixed gas.At the same time, a part of the high temperature mixed gas generated is By bringing the fuel into contact with the stirring and migrating fuel and preheating it, the evaporation time of the fuel can be accelerated.Always, a constant amount of combustion air is directly injected across the mixed gas passage into the fuel evaporation section to heat the fuel. The present invention provides a vaporizing burner which is capable of promoting swirling of the gas and continuing stable blue flame vaporization combustion over a long period of time. In addition to the purpose of
The above-mentioned problem is solved by providing a vaporizing burner that can preheat diffusing fuel more quickly and instantaneously evaporate it in a fuel evaporator.

Means for Solving the Problems Therefore, the technical problems of the present invention are to promote the evaporation of fuel, to efficiently stir and mix evaporated vaporized gas and combustion air, and to provide a fixed quantity of combustion air. Another objective is to improve the preheating effect of fuel by recirculating high-temperature gas mixture.

In order to solve the above-mentioned technical problem, the invention of item 1 is provided, in particular, by providing a rotatable or non-rotating type mantle, which has a closed upper end, an open base end, and a peripheral wall formed as a fuel evaporation part, in a combustion cylinder. Inside the mantle, a large number of centrifugal blower blades are arranged radially around the circumference at intervals to form a mixed gas passage between the mantle and the fuel evaporator, and an inner wall with an intake window opened in the upper wall. The mantle is rotatably housed so that the swirling wind generated by the centrifugal blower blades is blown directly onto the fuel evaporation section across the gas mixture passage, and the upper end of the mantle and the upper wall of the inner mantle are A gas return path is provided in between, with one end connected to the mixed gas passage and the other end connected to the inside of the inner mantle via the intake window, and a part of the mixed gas generated in the mixed gas passage is transferred to the centrifugal blower blade. This is a vaporizing burner, characterized in that the gas is sucked and circulated inside the inner mantle through a gas recirculation path by an intake action, and then is injected toward a fuel evaporating section, and the invention of item 2 is also a combustion tube. A rotating or non-rotating mantle is provided inside the mantle, the upper end of which is closed, the base end of which is open, and the surrounding wall is formed as a fuel evaporator. A large number of centrifugal blower blades are arranged radially around the circumference at intervals that form passages, and an inner mantle with upright blades and intake windows is rotatably housed in the upper wall. The air is blown directly onto the fuel evaporation section across the mixed gas passage, and between the upper end of the outer mantle and the upper wall of the inner mantle, one end is connected to the mixed gas passage and the other end is connected to an intake window. After that, a gas reflux path is provided which is connected to the inside of the inner mantle, and a part of the mixed gas generated in the mixed gas passage is sucked into the inside of the inner mantle through the gas reflux path by the suction action of the centrifugal blower blades and the upright blades. The vaporizing burner is characterized in that after the fuel is allowed to flow, the fuel is injected toward the evaporating section.

Effect The above technical means works as follows.

In Fig. 1, when starting combustion, the rotating shaft 5
When rotated, the outer mantle 6 and the inner mantle 10 are both rotated, and the centrifugal blower blades 13 are also rotated in unison. The swirling combustion air generated by the centrifugal blower blades 13 crosses the mixed gas passage 14, directly hits the inner circumferential surface of the fuel evaporator 9 of the mantle 6, and is pumped while being swirled and scattered around in a diffused manner. After being sent to the gas chamber 17 through the mixed gas passage 14, it is injected into the combustion cylinder 1.

On the other hand, due to the negative pressure effect caused by the rotation of the centrifugal blower blades 13, a part of the combustion air that remains and swirls in the mixed gas passage 14 is sucked into the inner mantle 10 through the gas return passage 19 and the intake window 12. Fuel evaporation section 9 again
It is sprayed directly towards the inner circumferential surface. Under this condition, if the fuel is diffused and transferred to the fuel evaporator 9 through the gas return path 19, the fuel will swirl along the inner circumferential surface of the fuel evaporator 9 due to the blowing action of the swirling combustion air. At the same time, the flow velocity is significantly reduced, and at the same time, it is diffused into a thin film, gradually flows down, and is scattered in the form of fine particles from the open end into the combustion tube 1, where it is ignited and burned live, resulting in a raw combustion flame. Heat the cloak 6 with. When the temperature inside the mixed gas passage 14 reaches the evaporation atmosphere temperature due to this heating effect, the fuel supplied so as to diffuse and transfer along the fuel evaporation section 9 of the mantle 6 is swirled and retained by the swirling combustion air. It is diffused into a thin film while being absorbed, and its flow rate is suppressed as much as possible. Therefore, while the fuel remains in the fuel evaporator 9 due to the above action, it is rapidly evaporated by being heated by the mantle 6 for a long time, and the generated vaporized gas remains in the mixed gas passage 14. During this time, the combustion air blows against the fuel evaporator 9 and is dispersed to the surrounding area while being rapidly stirred by the swirling combustion air, and the vaporized gas and combustion air are completely mixed to form a mixed gas. After that, the mixed gas is fed under pressure to the gas chamber 17 through the mixed gas passage 14, and the blue flame vaporized combustion flame is blown up. On the other hand, a part of the high-temperature mixture gas generated in the mixture gas passage 14 passes from the mixture gas passage 16 to the gas recirculation passage 19 due to the negative pressure action of the centrifugal blower blades 13, and then passes through the intake window 12 to the inner mantle 10. Then, the centrifugal blower blades 13 again spray the fuel toward the inner circumferential surface of the fuel evaporator 9. Therefore, the fuel diffused through the gas recirculation path 19 toward the fuel evaporator 9 comes into contact with the recirculated high-temperature mixed gas and is preheated and its temperature is increased, so that it is instantaneously evaporated and vaporized in the fuel evaporator 9. At the same time, the above-mentioned reflux action further promotes stirring and mixing of the evaporated gas and the combustion air, resulting in a complete mixed gas.

During the continuation of the above-mentioned blue flame vaporization combustion,
Since the swirling combustion air that blows into the mixed gas passage 14 has no blowing loss, a constant amount is always supplied and a homogeneous mixed gas can be sent to the gas chamber 17, so it is stable over a long period of time. A blue flame vaporized combustion flame can be lit up.

In the vaporizing burner shown in FIG. 2, the outer mantle 6 is fixed in a suspended manner within the combustion tube 1, and the inner mantle 10 is rotated by the rotating shaft 5, so that the fuel flows through the inner mantle 1.
After being diffused and transferred along the upper wall 11 of the fuel oil evaporator 9, it is sprayed in the form of fine particles onto the inner circumferential surface of the fuel evaporator 9 from its peripheral edge. The subsequent operation is similar to that of the vaporizing burner shown in FIG. 1, and stable blue-flame vaporization combustion is continued.

The vaporizing burner shown in FIG.
A part of the high temperature mixed gas generated in the mixed gas passage 14 is transferred to the intake blade 29 and the centrifugal blower blade 1.
3, the gas recirculation path 19 and the intake window 12
The water is actively refluxed into the inner mantle 10 through the
By spraying directly onto the inner circumferential surface of the fuel evaporator 9, the fuel diffused and supplied along the upper wall 11 is more efficiently preheated, thereby further promoting the generation of evaporated gas and complete mixture gas. The function is the same as that of the first evaporating burner, except that the negative pressure action by the intake blade 29 is added to the vaporizing burner shown in the first fig.
It is the same as the vaporizing burner shown. Moreover, even if the vaporizing burner shown in FIG. 4 is the vaporizing burner shown in FIG.
A part of the high temperature mixed gas generated in 4.
The air is efficiently recirculated by the negative pressure action of the radial intake vanes 29 provided on the upper wall 11 of the inner mantle 10,
Other than the fact that the fuel diffusing and migrating along the upper wall 11 is more efficiently preheated to promote the generation of evaporated gas and to completely generate mixed gas, its effect is similar to that of the second one.
It is the same as the vaporizing burner shown.

Embodiments The configurations of various types of vaporizing burners according to the present invention will be described with reference to various preferred embodiments shown in the accompanying drawings.

The vaporizing burner shown in FIG. 1 has an outer mantle 6 and an inner mantle 10 that are integrally connected and rotated by a rotating shaft 5, and fuel oil is supplied along the inner peripheral surface of the outer mantle 6, thereby achieving vaporization combustion. 1 is a bottomed cylindrical combustion tube with an open upper end, and at the center position on the bottom wall side of the combustion tube 1, there are gradually decreasing diameters toward the tip. A hollow flashback prevention tube 2 is installed upright, and an intake chamber 3 in which an electric motor 4 is housed is installed adjacent to the bottom wall of the combustion tube 1, so that the combustion tube 1 and the intake chamber 3 are reversed. They are connected via a fire prevention tube 2. Reference numeral 5 denotes a rotating shaft inserted into the combustion tube 1 through the flashback prevention tube 2, and the tip end of the rotating shaft 5 is closed with a closing wall 7.
The periphery of the open side of the base end is formed into a bent shape toward the open side of the combustion tube 1, and the peripheral end thereof is formed into a fuel splashing end 8.
A mantle 6 having a peripheral wall formed in the fuel evaporating part 9 is directly connected to the fuel evaporating part 9. 10 is a combustion tube 1 and a flashback prevention tube 2
The inner mantle 10 is housed within the outer mantle 6 such that its lower part is located between the inner mantle 10 and the outer mantle 6 through a suitable connecting member. The inner mantle 10 has an upper wall 11 with an intake window 12 opened in the center on the upper end side, and a fuel evaporation part 9 of the outer mantle 6 is provided around the body.
A large number of centrifugal blower blades 13 are provided so as to form a mixed gas passage 14 between the combustion tube 1 and the gas guiding blade 13 extending horizontally outward along the bottom wall of the combustion tube 1 on the lower end side. A wall 15 is provided. A gas wall tube 16 is disposed in the combustion tube 1 around the open side of the mantle 6 so as to cover the peripheral part from the outside, and a gas wall tube 16 is provided between the base end open side periphery of the mantle 6 and the gas wall tube 16. A gas chamber 17 is provided to which the discharge side of the mixed gas passage 14 is connected, and an annular gas ejection passage 18 from which the mixed gas is ejected is opened outside the gas chamber 17.

Between the inner surface of the closing wall 7 of the outer mantle 6, which is the upper end side of the inner mantle 10 described above, and the surface of the upper wall 11, one end is connected to the mixed gas passage 14, and the other end is connected to the inner mantle 10 through the intake window 12. A gas recirculation path 19 communicating with the inside is formed, and the bottom wall of the combustion tube 1 and the flashback prevention tube 2 are formed.
A rotation gap 20 is provided between the gas guide wall and the lower part of the centrifugal blower blade 13. At the center of the inner surface of the closing wall 7 of the mantle 6, there is a hollow inverted cone-shaped fuel diffuser 21, which is hollow inside and has a fuel jet gap 22 at its upper end and is integrally fitted with a cover plate, which is rotated so as to be in close contact with it. It is attached to the shaft 5. Then, a fuel supply pipe 2 is attached to the inner or outer surface of the small diameter side of the fuel oil diffuser 21.
Pour the fuel into the fuel diffuser 2 with the opening at the end of 3 facing out.
After being diffused and supplied to the inner circumferential surface of the closing wall 7 from 1, the mantle 6
The fuel is diffused and transferred in a thin film toward the inner circumferential surface of the fuel evaporation section 9. 24 is an ignition plug disposed within the combustion tube 1.

The vaporizing burner of the second embodiment shown in FIG.
The outer mantle 6 is fixed in a suspended state within the combustion tube 1 by a mounting member 30, and is directly connected to the rotating shaft 5 inserted through the inner mantle 10 for rotation. Instead of opening the intake window 12 and eliminating the gas wall tube 16 shown in the first figure, the gas guide wall 15 is made to cover the area around the open base end of the mantle 6 from the outside, and the area around the open base side and the gas guide wall 15 are connected to each other. The gas chamber 1 is arranged such that a gas ejection passage 18 is provided between the gas chambers 1 and 1.
7 was formed. In the above embodiment, a fuel supply passage 5a is provided inside the rotating shaft 5, so that the upper wall 11 of the inner mantle 10 can be attached to the rotating shaft 5 through the fuel supply fitting 25 and the mounting member 26. A radial fuel spout groove 27 communicating with the oil supply passage 5a is provided on the back side of the oil supply fitting 25 which is directly connected to the surface of the upper wall 11 and is in close contact with the surface of the upper wall 11.
The fuel supplied from the above is spouted toward the surface of the upper wall 11, and this is mixed with the high temperature mixed gas that recirculates in the gas recirculation path 19 while the fuel is diffused and transferred along the surface of the upper wall 11 toward the peripheral end. The structure is the same as that of the vaporizing burner of the first embodiment except that the fuel is contacted and preheated while being sprayed toward the inner circumferential surface of the fuel evaporating section 9 to promote evaporation and vaporization.

The vaporizing burner of the third embodiment shown in FIG. 3 has a structure in which the fuel supply means and the recirculation of high-temperature mixed gas are further promoted compared to the vaporizing burner of the embodiment of FIG. 1. The only difference is that the inner mantle 1
An integral fuel diffuser 28 is provided by recessing the periphery of the opening of the upper wall 11 inward to form an inverted conical shape. With the opening facing, the fuel supplied from the fuel supply pipe 23 is diffused and transferred along the front or back surface of the upper wall 11, and is sprayed in fine particles from the peripheral end toward the inner peripheral surface of the fuel evaporator 9. In addition, a plurality of intake blades 29 are provided in the plurality of intake windows 12 provided on the upper wall 11.
are erected radially so that a part of the high-temperature mixed gas generated in the mixed gas passage 14 actively flows into the gas return passage 19 due to the negative pressure action between the city intake blades 29 and the centrifugal blower blades 13. By enabling reflux, the preheating effect of the supplied fuel is enhanced, evaporation is accelerated, and at the same time, stirring and mixing of the mixed gas and combustion air is further promoted, and a homogeneous mixed gas is stably supplied to the gas chamber 17. The other structure is the same as that of the vaporizing burner shown in FIG. 1.

In the vaporizing burner of the fourth embodiment shown in FIG. 4, the outer mantle 6 is of a fixed type and the inner mantle 10 is of a rotary type. 19, and the configuration other than that the air intake blades 29 are erected near the air intake window 12 opened in the upper wall 11 is the second one.
This is exactly the same as the vaporizing burner in the illustrated embodiment.

Note that the shapes of the oil supply means and gas chamber 17 used in the above-mentioned vaporizing burner are not limited to those of this embodiment, and any configuration of the oil supply device and gas chamber 17 may be used without any problem.

Effects of the Invention In short, since the present invention has the above-described specific structure, even if the outer mantle 6 and the inner mantle 10 are rotated together, or the outer mantle 6 is fixed and the inner mantle 10 is rotated, Even if fuel flows down along the inner circumferential surface of the fuel evaporator 9, the fuel flowing down along the inner peripheral surface of the fuel evaporator 9 is swirled and retained by the direct blowing action of a certain amount of swirling combustion air blown by the centrifugal blower blades 13, thereby promoting the diffusion effect. After the generated evaporated gas is temporarily swirled and retained in the mixed gas passage 14 by swirling wind, in order to promote the occurrence of evaporation,
The fuel is directly injected into the fuel evaporation section 9 and mixed with swirling combustion air while scattering around in a diffused manner.
Not only can it promote stirring and mixing of the vaporized gas and the combustion air to obtain a complete mixture of gases, which can be stably combusted with jets, but also can reduce the high temperature mixture generated in the mixture gas passage 14. A part of the air gas is passed through the gas return path 19 into the inner mantle 10 through the intake window 12 by the negative pressure action of the centrifugal blower blade 13 or the negative pressure action between the centrifugal blower blade 13 and the intake blade 29. The fuel is quickly preheated by contact with the circulating high-temperature mixed gas, and the fuel is instantaneously evaporated in the fuel evaporator 9, and the refluxed mixed gas is centrifugally blown. The blade 13 directly injects the fuel into the fuel evaporating section 9 and stirs it, further promoting the stirring and mixing of the mixed gas or vaporized gas and the combustion air, and making it possible to continue more stable blue flame vaporization combustion. be effective.

[Brief explanation of drawings]

The drawings show various embodiments of the vaporizing burner according to the present invention, in which FIG. 1 is a partially cutaway longitudinal sectional front view of the vaporizing burner when the outer mantle and inner mantle are rotated together, and FIG. The figure shows a partially cut-away front view of a vaporizing burner with a fixed outer mantle, and Figure 3 shows a partially cut-away view of a vaporizing burner in which the outer mantle and inner mantle rotate together, and intake blades are provided on the inner mantle. FIG. 4 is a longitudinal sectional front view of the vaporizing burner with a portion cut away when the outer mantle is fixed and intake blades are provided on the rotating inner mantle. 1... Combustion tube, 6... Mantle, 7... Blocking wall, 9
... Fuel evaporation section, 10 ... Inner mantle, 11 ... Upper wall,
12...Intake window, 13...Centrifugal blower blade piece, 14...
...Mixture gas passage, 19...Gas return passage, 29...
Intake winglet.

Claims (1)

[Claims] 1. In the combustion cylinder, the upper end is closed and the base end is open,
A rotatable or non-rotating mantle having a peripheral wall formed as a fuel evaporating part is provided, and inside the mantle there are a number of centrifugal mantles surrounding the mantle at intervals to form a mixed gas passage between the mantle and the fuel evaporating part. The blower blades are arranged radially, and an inner mantle with an intake window opened in the upper wall is rotatably housed to allow the swirling wind generated by the centrifugal blower blades to cross the mixed gas passage and reach the fuel evaporation section. In addition to direct injection, a gas return path is provided between the upper end of the outer mantle and the upper wall of the inner mantle, with one end connected to the mixed gas passage and the other end connected to the inside of the inner mantle through the intake window. Vaporization characterized in that a part of the mixed gas generated in the gas passage is drawn into the inner mantle through the gas return passage by the suction action of the centrifugal blower blades, and then is injected toward the fuel evaporation part. Burna. 2 Inside the combustion cylinder, close the top end and open the base end,
A rotatable or non-rotating mantle having a peripheral wall formed as a fuel evaporating part is provided, and inside the mantle there are a number of centrifugal mantles surrounding the mantle at intervals to form a mixed gas passage between the mantle and the fuel evaporating part. Blower blades are arranged radially, and an inner mantle with intake blades and an intake window is rotatably housed in the upper wall, and the wind generated by the centrifugal blower blades is transferred across the mixed gas passage to fuel. In addition to direct injection to the evaporation part, a gas return path is provided between the upper end of the outer mantle and the upper wall of the inner mantle, with one end connected to the mixed gas passage and the other end connected to the inside of the inner mantle through the intake window. A part of the mixed gas generated in the mixed gas passage was drawn into the inner mantle through the gas return path by the suction action of the centrifugal blower blades and the upright vanes, and then sprayed toward the fuel evaporation section. A vaporizing burner characterized by: