JPH0933009A - Complete combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a complete combustion device to improve fuel consumption, being amiable to environment, and eliminate a need for soot removal, and reduce size and a cost. SOLUTION: Kerosene drips not gasified during atomization through a nozzle 13 and flying out through a combustion nozzle 12 flys up to ceramic fibers 22. The ceramic fibers 22 are rapidly impregnated with the kerosene drips reaching the ceramic fibers 22 without being widely stretched by a surface tension. In this case, since the ceramic fibers 22 are heated by the heat of flame 14, the kerosene with which the ceramic fibers 22 are impregnated is promptly gasified. This constitution performs complete combustion in a complete combustion chamber 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a complete combustion device, and more particularly to a complete combustion device for an external combustion device.

[0002]

2. Description of the Related Art Conventionally, a burner using a liquid fuel such as kerosene has been used for heating a sterilizer or the like. In these burners, liquid fuel was sprayed from a nozzle and sent to a combustion cylinder, and the liquid fuel was burned at the combustion port. However, especially in cold weather, the sprayed fuel was not sufficiently vaporized, so incomplete combustion was likely to occur. . Therefore, there is a problem that fuel consumption is wasted, and soot is attached to the combustion port and the hot air port, so that cleaning must be performed regularly. Had the problem of destroying the environment. Complete combustion of the burner has been a major problem in this field, and until now, complete combustion of the liquid fuel of the burner has been generally realized by supercharging air into the combustion port.

However, by supercharging the air into the combustion port, the flow of air becomes faster and the warmed air immediately passes through the warm air port, resulting in poor thermal efficiency. Further, there is a problem that the device becomes very large, and furthermore, it is very expensive.

[0004]

The present invention has been made in order to solve the above-mentioned problems of the prior art. By preventing incomplete combustion, fuel consumption is improved, environment-friendly, and It is an object of the present invention to provide a complete combustion device that does not require soot cleaning as a small size and low cost.

[0005]

The complete combustion apparatus of the present invention is an external combustion apparatus, which comprises a heat resistant fiber for impregnating the fuel droplets scattered from the combustion port of the external combustion apparatus. is there. The external combustion device uses liquid or solid as fuel. The extent to which the heat resistant fiber is covered in the burning portion is determined by the relationship with the external combustion device, and may cover the whole or a part. Here, as the heat-resistant fiber, for example, a ceramic fiber or a metal fiber having a high melting point, which does not melt or burn by the heat of combustion, is used.

[0006] Here, it is preferable that the heat resistant fiber is made of two or more kinds of layers. In this case, heat-resistant fibers having lower adiabatic temperature characteristics are provided on the outer side. Further, in order to prevent the heat-resistant fiber from being impregnated with a large amount of fuel and carbonized, the heat-resistant fiber in the portion near the combustion port may be fired.

Further, in the complete combustion apparatus of the present invention, a porous member such as pumice or foam concrete or a metal net of one or more layers can be used instead of the heat resistant fiber.
Further, in order to prevent carbonization of a large amount of fuel impregnated into the heat resistant fiber or the like, a heat resistant plate such as a titanium alloy may be attached to a portion near the combustion port.

In the above complete combustion apparatus, the fuel droplets that have scattered without being vaporized from the combustion port of the external combustion apparatus reach the heat resistant fiber or the like. Due to the characteristics of the heat-resistant fibers and the like, the fuel droplets are rapidly impregnated into the heat-resistant fibers without being greatly stretched by the surface tension. Here, the fuel droplets impregnated in the heat-resistant fiber or the like are immediately vaporized by the heat because the heat-resistant fiber or the like is largely heated by the heat of the burning portion, that is, the flame. Then, by vaporizing the fuel in this way, the fuel can be burned accurately and complete combustion is achieved.

As a result, the thermal efficiency is improved, the fuel consumption can be improved, and the generation of toxic gas is suppressed so that the environment is not destroyed, and further, soot is attached to the combustion port of the external combustion device. The need for regular cleaning is eliminated because of the disappearance. Moreover, since the structure is very simple as described above, the size and cost can be reduced.

Since the heat resistant fibers and the like of the above complete combustion apparatus are easily deteriorated and collapsed by heat, the outer circumference thereof is preferably covered with a metal plate in order to increase the strength.

The metal plate may be covered with a heat insulating material in order to prevent a decrease in thermal efficiency due to heat radiation from the metal plate. On the other hand, a cooling device is provided around the metal plate to prevent deterioration of the device due to combustion heat. It can also be configured.

Further, by providing one or more small holes for supplying gas from the outside of the complete combustion device in the vicinity of the combustion port, scattering of fuel droplets due to the flow of this gas is further suppressed, and the effect of complete combustion is achieved. Can be improved.

By making the above complete combustion device separable from the external combustion device, versatility can be provided.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway sectional view of a burner and a complete combustion apparatus showing an embodiment of the present invention.

Referring to this figure, the burner 10
The kerosene is sprayed from the nozzle 13 inside the combustion cylinder 11 to the combustion port 12, is atomized and supplied, and the flame 14 is obtained by burning the atomized kerosene. The complete combustion device 20 has a cylindrical ceramic fiber 2 that covers the entire flame 14.
2 and a metal plate 21 wound around the outer periphery thereof. And, the cavity inside the ceramic fiber 22 is
The complete combustion chamber 23 enables complete combustion of kerosene. Although the complete combustion device 20 is configured to be separable from the burner 10, it is used by attaching and fixing the base portion of the complete combustion device 20 to the combustion cylinder 11 as shown in the figure.

By the way, when kerosene is atomized and supplied to the combustion port 12, most of it is vaporized and burned. However, some of the kerosene is not vaporized here and is scattered as kerosene droplets (not shown) from the combustion port 12.

The scattered kerosene droplets fly to the ceramic fiber 22. The kerosene droplets that have reached the ceramic fibers 22 are rapidly pulled by the surface tension due to the structural action of the fibers, and the ceramic fibers 22 are rapidly drawn.
Impregnate into. However, the ceramic fiber 22 has a flame 1
Ceramic fiber 2 because it is heated by the heat of 4
Kerosene impregnated in 2 is immediately vaporized. As a result, the kerosene that has not been vaporized when being atomized and supplied to the combustion port 12 is completely burned in the complete combustion chamber 23.

As described above, since kerosene is completely burned,
Thermal efficiency improves and fuel consumption can be improved. Further, since the generation of toxic gas is suppressed, the environment is not destroyed, and soot is not attached to the combustion port 12, so that periodical cleaning is not necessary. Moreover, as described above, since the structure is very simple, it is possible to reduce the size and cost of the complete combustion device. Furthermore, noise during combustion is reduced.

In the above complete combustion device 20,
The metal plate 22 is provided to increase the strength of the ceramic fiber 22 because the ceramic fiber 22 is easily deteriorated by heat and easily collapses. That is, it is possible to use it as a complete combustion device without the metal plate 21. In addition, the metal plate 21
In order to prevent the reduction of thermal efficiency due to heat radiation from the metal plate 21
May be covered with a heat insulating material such as ceramic fiber.

When the ceramic fiber 22 has a multi-layer structure, the thermal efficiency is improved. Further, if the kerosene droplets scattered from the combustion port 12 can be impregnated into the inside without being greatly pulled by the surface tension, metal fibers, pumice stone, foam concrete, or fine metal can be used instead of the ceramic fibers 22. A net or the like can also be used.

Next, another embodiment of the present invention will be described.

2 to 7 are partially cutaway sectional views of a burner and a complete combustion apparatus according to another embodiment of the present invention.

Explaining these figures, the complete combustion device 30 does not cover the entire flame (not shown) because the direction in which the kerosene droplets are scattered is limited to a substantially constant direction (here, the lower side). It is configured to cover only the part.

The complete combustion device 40 is constructed so that its tip is narrowed so that the scattered kerosene drops are vaporized without escape.

The complete combustion device 50 is provided with a complete combustion chamber 53 in the middle thereof so that the scattered kerosene droplets are completely burned there.

The complete combustion device 60 has a tip part widened so that the heat of combustion of kerosene can be efficiently released after the middle part of the complete combustion device 60 is set so as to vaporize the scattered kerosene oil without letting it escape.

The complete combustion device 70 includes a ceramic fiber 72.
In order to prevent carbonization of the fuel impregnated in, the titanium alloy 75 is attached near the combustion port.

The complete combustion device 80 is provided with a cooler / air supplier 85 around the metal plate 81. Air is forcibly sent through the intake port 87, and the metal plate 81 is forcibly cooled. At the same time, this air is sent from the air supply hole 86 to the combustion chamber 83, and kerosene droplets scattered from the combustion port 12 by this air pressure are vaporized as much as possible until they reach the ceramic fibers 84, and are scattered only near the combustion port 12. By not doing so, the effect of complete combustion is enhanced.

FIG. 7 is a partially cutaway sectional view of a combustion cylinder of a burner integrally attached with a complete combustion device according to another embodiment of the present invention.

Referring to this figure, the combustion cylinder 81
A ceramic fiber 84 is attached to the front portion of the combustion port 82. That is, the kerosene droplets sprayed from the nozzle 83 and ejected from the combustion port 82 without being vaporized impregnate the ceramic fibers 83, and the kerosene impregnated in the ceramic fibers 83 is immediately vaporized by the combustion heat and completely burned. Will be done.

In the above description, the complete combustion device was set in the burner that uses kerosene as a fuel, but when it is set in the burner that uses A heavy oil as a fuel, in terms of fuel consumption and cleanliness, the complete burner is completely removed. The effect of the combustion device is further exerted.

The case where the complete combustion device of the present invention is applied to a burner has been described above, but the present invention is not limited to this, and it is generally used for external combustion devices such as petroleum stoves.

[0034]

EXAMPLE A complete combustion apparatus according to an example of the present invention will be described below with reference to FIG.

Referring to FIG. 9, the burner 100
Is composed of a fan 101 and an oil pump 102, and mixes air sent from the fan 101 to the burner port 103 with kerosene or heavy fuel oil A sprayed from the nozzle 104 by the oil pump 102 to form a gas for combustion. Is. Here, Olympia SL-3 is used for the burner 100, and the blowing angle of the nozzle 104 is 60 °.

The complete combustion device 110 has a structure and size as shown in the figure.
It is composed of three layers of ceramic fibers 111 to 113, a wire mesh 114, and a protective cylinder 115 from the inside. Here, the ceramic fiber 111 is a product TOMBO No.
5420, # 700 (maximum operating temperature 1500 ° C, outer diameter dimension 177.4φ × 170.4φ × 150, thickness 3)
The ceramic fiber 112 is a product TOMBO No. 54
20, # 400 (Maximum operating temperature 1400 ° C, outside diameter 2
04.4φ × 176.4φ × 150, thickness 15), the ceramic fiber 113 is the product TOMBO No. 511
5 (maximum operating temperature 1200 ° C, outer diameter 216.4φ x
206.4φ × 150, thickness 6), the wire mesh 114 is # 60, SUS304 (wire diameter 0.8, outer diameter dimension 218φ × 208φ × 148, thickness 0.8), and the protective cylinder 115 is SUS304 (outer diameter dimension 220φ x 210
φ × 150, thickness 1) is used (all units of dimensions are mm).

The burner tile section 120 has a structure as shown in the figure, and is designed to send air from the fan 121 to the chamber 122 provided by the deformation duct 123. Further, the burner tile section 120 is provided with an air supply hole 126 which is divided into 12 and is twisted into a size of 6 × 15 on the circumference.

With this configuration, the fuel droplets that have not been vaporized when sprayed from the nozzle 104 are sufficiently vaporized to realize complete combustion, and in the case of this embodiment, the following effects are obtained. .

By providing the air supply hole 126,
The combustion air sent from the fan 121 creates a cyclone wind as shown in FIG. 6B, supplies necessary air to a portion where the combustion air amount in the drawing is too small, and further outside the burner tile section 120. Energy efficiency is increased by utilizing the heat radiation effect to the.

By laminating the ceramic fibers 111 to 113 and the wire mesh 114, thermal shock and durability can be improved.

In order to verify the above, Tables 1 and 2 show the results of comparison between the case where the complete combustion device is provided and the case where the complete combustion device is not provided in this embodiment. In this experiment, the outside temperature was 22
° C.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

As described above, according to the complete combustion apparatus of the present invention, the thermal efficiency is improved, the fuel consumption can be improved, and the generation of toxic gas can be suppressed, so that the environment is not destroyed, and Does not need soot because it does not adhere to the combustion port of the external combustion device. Moreover, since the structure is very simple, the size and cost can be reduced.

(Industrial Applicability) As a specific range of application of the present invention, for example, it is combined with a burner for heating a jet heater, a heat exchanger, a sterilizer, a greenhouse or the like, or is incorporated in the burner. It can be used as a shape.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a burner and a complete combustion device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 3 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 4 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 5 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 6 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 7 is a partially cutaway sectional view of a burner and a complete combustion device according to another embodiment of the present invention.

FIG. 8 is a partially cutaway sectional view of a combustion cylinder of a burner integrally attached with a complete combustion device according to another embodiment of the present invention.

FIG. 9 is a sectional view of a burner and a complete combustion apparatus showing an embodiment of the present invention.

[Explanation of symbols]

10 Burner 11,81 Combustion cylinder 12,82 Combustion port 13,83 Nozzle 20,30,40,50,60,70,80 Complete combustion device 21,81 Metal plate 22,72,84,94 Ceramic fiber 23,53, 83 Complete combustion chamber 75 Titanium alloy 85 Cooler / air supply 86 Air supply hole

Claims (11)

[Claims] 1. A complete combustion device for an external combustion device, comprising a heat resistant fiber for impregnating fuel droplets scattered from a combustion port of the external combustion device. 2. The complete combustion apparatus according to claim 1, wherein the heat-resistant fiber is a multilayer of two or more kinds. 3. The complete combustion apparatus according to claim 1, wherein the heat-resistant fiber has a portion near the combustion port burned. 4. A complete combustion device in an external combustion device, comprising a porous member for impregnating fuel droplets scattered from a combustion port of the external combustion device. 5. A complete combustion device in an external combustion device, comprising a metal net of one or more layers for impregnating fuel droplets scattered from a combustion port of the external combustion device. 6. The complete combustion apparatus according to claim 1, wherein a heat resistant plate is attached to a portion of the heat resistant fiber, the porous member or the metal mesh near the combustion port. 7. A complete combustion device according to any one of claims 1 to 6, wherein the outer periphery of the complete combustion device is covered with a metal plate. 8. The complete combustion device according to claim 7, wherein the metal plate is covered with a heat insulating material. 9. The complete combustion device according to claim 7, wherein a cooling device is provided around the metal plate. 10. The complete combustion apparatus according to claim 1, wherein one or more small holes for supplying gas from outside the complete combustion apparatus are provided near the combustion port. . 11. The complete combustion device according to claim 1, wherein the complete combustion device is configured to be separable from the external combustion device.