JPH0247641B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oil combustor having a wick that is movable up and down.

Conventional configuration and its problems As shown in Figures 1 and 2, in conventional combustors of this type, kerosene vapor generated from a wick 1 is transferred to an inner flame tube 2, an outer flame tube 3, and an outer flame tube. Primary combustion is performed in a double-tube primary combustion tube composed of a tube 4, a heat-transmitting tube 5, and a partition plate 6, and the unburned gas is then transferred to a flame expansion chamber 7a provided above the inner flame tube 2. Some devices are seen in which secondary air is supplied from device 7 to cause white flame combustion. However, in this combustor, when the height of the wick protruding from the fire pan suddenly changes from the minimum to the maximum, the amount of kerosene vapor temporarily becomes excessive due to the high heat in the fire pan, causing a secondary flame centered around the flame spreader 7. It is not possible to completely process (white flame combustion) in the processing area, and as a result, there is a lack of air, and the elongated flame curls toward the center above the flame spreader 7 and reaches the top plate. . Under such conditions, significant amounts of soot and carbon monoxide were generated, which caused problems such as odor and impossibility for practical use.

Purpose of the Invention The present invention has been made in view of the above points, and is aimed at suppressing the generation of soot and odor, which are the biggest drawbacks of white flame combustion.

Structure of the Invention In order to achieve the above object, the present invention leads out an air introduction pipe from the upper part of the inner flame cylinder, and connects the upper end opening of the air introduction pipe near the upper opening end of the heat ray transmission cylinder and above the primary combustion part. A shielding plate is positioned above the upper end of a normal flame formed in the heat exchanger and facing the upper end opening with a certain gap, and the heat ray transmitting cylinder is fixed at the outer periphery of the shielding plate.

DESCRIPTION OF THE EMBODIMENTS One embodiment will be described below with reference to FIG. 3. Reference numerals 10 and 11 are inner and outer wick guide tubes installed vertically from the fuel tank (not shown) of the combustor, and the upper end thereof is connected to the fire pan. 10a and 11a. 12 is a lamp wick provided between the wick guide tubes 10 and 11 so as to be vertically movable;
It sucks up the kerosene in the fuel tank and vaporizes it. Reference numeral 13 denotes a combustion tube placed on the fire pans 10a, 11a, which includes an inner flame tube 14, an outer flame tube 15, and an outer flame tube 16 having a large number of through holes 14a, 15a, and an outer flame tube 16, and a heat ray transmitting tube 17 provided above. Primary combustion section 18
is formed. A secondary combustion chamber 19 is formed above the primary combustion section 18 by extending the heat ray transmitting cylinder 17 17'. Here, the upper end of the outer flame tube 15 of the primary combustion section 18 is left open 20a, 20b without providing a cover plate, etc., and the outer flame tube 15 and the heat ray transmission tube 17 are provided above the outer flame tube 15. Partition plate 2 that guides the air between the inner flame tube 14 and the upper part of the air introduction pipe 21 (described later)
2 is provided. This partition plate 22 has an opening 23 in the center with a smaller diameter than the outer flame tube diameter.
5 and the heat ray transmitting tube 17. A cover plate 25 covers the upper end of the inner flame cylinder 14, and has a large number of through holes 26 and a large opening 27 in the center. Reference numeral 28 denotes an air guide cylinder fixed to the lower surface of the lid plate 25 for guiding air to the large opening 27. It is located inside the inner flame cylinder 14 and has a perforated plate 29 at its lower end opening. is fixed. On the other hand, the lid plate 2
The above-mentioned air introduction pipe 21 is erected and fixed on the upper surface of 5 so as to surround the large opening 27, and its upper end passes through the secondary combustion chamber 19 to form the upper heat ray transmitting cylinder 17. ' has an opening 30 near the upper end opening. Reference numeral 31 denotes a heat ray transmitting body holder, and a shielding plate 31 is located at a portion facing the upper end opening 30 of the air introduction pipe 21 with a certain gap from this opening 30.
a, and this shielding part 31a and the air introduction pipe 2
1 forms a soot generation suppression device 32. That is, when the white flame burning in the secondary combustion chamber 19 grows, fresh air is supplied to the tip of the white flame to cause complete combustion and to suppress further flame growth. Further, the heat ray transmitting body holder 31 is formed in a step-like shape, and an exhaust hole 33 is formed in the horizontal surface thereof, and the gap between the shielding plate 31a and the opening 30 is covered with a vertical wall surface to take account of cross winds. There is. The heat ray transmitting body holder 31 is connected to the perforated plate 2 in the air guide tube 28 by means of a bolt shaft 34.
It is fixed at 9. Further, a spacer metal fitting 35 is provided on the bolt shaft 34 to prevent the centers of the inner flame cylinder 14 and the air introduction pipe 21 from being largely misaligned.

In the above configuration, the kerosene vapor generated in the lamp wick 12 is primarily combusted in the primary combustion section 18, which is composed of the inner flame tube 14, the outer flame tube 15, the outer tube 16, the partition plate 22, and the heat ray transmitter 17, The flame becomes a white flame and extends from the opening of the partition plate 22 to the upper secondary combustion chamber 19, where the white flame surrounds the air introduction pipe 21 by a natural draft as shown by A in FIG. It becomes a cylindrical flame and burns completely. Here, if the amount of vaporization of this white flame temporarily becomes excessive due to a sudden change from weak combustion to strong combustion, the flame becomes so large that it comes into contact with the heat ray transmitting body holder 31, as shown by B in FIG. In this case, air is supplied from the upper end opening of the air introduction pipe 21, and the unburned components that generate soot and the like in the conventional combustor are completely combusted. Therefore, the generation of soot and odor is suppressed. Furthermore, when the white flame touches the vicinity of the open end of the air introduction pipe 21, the temperature in that vicinity rises and the draft also increases, which increases the amount of incoming air and further enhances the soot and odor suppression effect described above. It will be done. In addition, since there is no opening in the rising wall of the air introduction pipe 21, even in the event of disturbances such as cross winds, the flame will not be directly affected, and therefore the normal combustion characteristics will not be affected. , it is possible to process the tip of a white light flame with long flame legs.

In the above embodiment, the primary combustion section 18 and the heat ray transmission cylinders 17, 17' of the secondary combustion chamber 19 are integrated, and secondary air is supplied to the white flame in the secondary combustion chamber 19 from the through hole 24 of the partition plate 22. However, for example, the heat ray transmission tube may be divided into primary and secondary combustion sections and a gap for secondary air supply may be provided between the two, or a through hole for secondary air supply may be provided in the integrated heat ray transmission tube. Also, in this embodiment, the soot generation suppressing device 32 is constructed by using the air introduction pipe 21 and the heat ray transmitting tube holder 31, but for example, Installing the shielding plate, the first conventional example
As shown in the flame spreader shown in the figure, a shield plate may be attached to the upper end of the air introduction pipe 21, and any structure including these and other parts may be used as long as it achieves the object of the present invention. It may be configured as follows.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, even if the combustion is suddenly changed from weak combustion to strong combustion, secondary combustion of white flame with significantly less soot and odor generation can be obtained. The clean exhaust gas characteristics inherent to combustion can be obtained over a wide combustion range. In addition, since the heat ray transmitting tube is fixed on the outer periphery of the shielding plate, there is no need for a dedicated fixing member and the structure can be simplified, which has great effects.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional oil combustor, and FIG. 3 is a sectional view of an oil combustor according to an embodiment of the present invention. 13... Combustion tube, 14... Inner flame tube, 15... Outer flame tube, 16... Outer tube, 17, 17'... Heat ray transmission tube, 18... Primary combustion section, 19... Secondary combustion chamber ,
32...Soot generation suppression device.

Claims (1)

[Claims] 1 A primary combustion section is formed by a combustion tube consisting of an inner flame tube, an outer flame tube, an outer tube, and a heat ray transmission tube, and a secondary combustion chamber surrounded by a heat ray transmission tube is formed above the primary combustion section, and the An air introduction pipe with an open upper end is installed in the upper part of the inner flame cylinder, and the upper end opening of this air introduction pipe is near the upper opening end of the heat ray transmission cylinder and is the upper end of the normal flame formed above the primary combustion part. The oil combustor is provided with a shielding plate located above the air introduction pipe and facing the upper end opening of the air introduction pipe with a certain gap therebetween, and fixing the heat ray transmitting tube around the outer periphery of the shielding plate.