JPS6226410A - Wick type liquid fuel burning device - Google Patents

Abstract

PURPOSE:To prevent burning deviation, improve performance of burnt exhaust gas at the time of weak burning, and make uniform burning possible by installing divided burner plates which are placed on a burner plate supporting burning cylinder and are separated between adjacent burning chambers. CONSTITUTION:On a burner plate 14 located outside, divided burner plates 16 having inverted L-shape are placed. The divided burner plates 16 are cut out and separated thermally at boundary parts of adjacent burning chambers. When burning is started, burning heat is transferred by radiation and also to the divided wicks from the divided burner plates 16 into regular burning. When one of the divided wicks is extinguished to control heating power, heat transfer is stopped from the divided burner plate 16 at the burning side to the divided burner plate 16 at the extinguished side. Temp. of the divided burner plate 16 at the burning side becomes uniform in circumferential direction. As a result, heat input to the divided wick at the burning side is constant and uniform fuel vaporization is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wick-type liquid fuel combustion device in which a wick is impregnated with liquid fuel and then combusted.

[Technical background of the invention and its problems]

A wick-type oil combustor, conventionally known as a wick-type liquid fuel combustion device, forms a combustion chamber by arranging an outer flame tube concentrically on the outside of an inner flame tube that has many ventilation holes. The wick provided at the lower part is impregnated with petroleum, and the petroleum vapor evaporated from the wick is combusted inside the combustion chamber.

By the way, in this type of wick-type oil combustor, the amount of rising flame can generally be adjusted by adjusting the amount of exposure of the wick from a wick guide that supports the wick impregnated with oil. It is being said.

However, when the wick is lowered toward the guide side in order to reduce the thermal power, although the amount of oil evaporation is temporarily suppressed and the thermal power becomes smaller, the combustion area of the evaporated fuel moves downward and the wick temperature increases. This will lead to an increase in oil evaporation. For this reason, the firepower could not be reduced unless the core was lowered extremely, and the V4 width was also small.

On the other hand, if the wick is raised to increase the amount of wick exposed in order to increase the thermal power, the wick impregnated with a large amount of petroleum will be introduced into the high temperature atmosphere inside the combustion cylinder. As a result,
The amount of oil evaporation was accelerated rapidly, and the evaporated fuel could no longer be completely combusted in the combustion chamber, resulting in the occurrence of standing flames. Therefore, there was a problem in terms of safety measures.

In addition, during weak combustion, the flame moves to the lower position of the combustion chamber (5), which reduces premixing with combustion air, leading to incomplete combustion and the generation of harmful gases such as Co and THC. There was a problem that caused the problem.

Therefore, a wick-type liquid fuel combustion device was devised in which the wick is divided so that combustion can be performed independently, and the combustion chamber is divided by partition plates to adjust the thermal power. However, when this device is used to adjust the firepower, the temperature of the fire pan on which the combustion tube is placed is lower on the extinguishing side, so heat transfer occurs near the partition plate on the combustion side. This causes a temperature difference between the area near the partition plate and the center of the fire pan in the combustion area, making it impossible to achieve uniform evaporation as a whole, and causing the flame to be uneven.
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This creates a strength distribution of force and causes the flame to become uneven.
; It becomes a vicious cycle. Moreover, when the flame is unevenly distributed, the air supply becomes uneven, resulting in air-deficient areas and air-excess areas, resulting in the generation of harmful gases such as Co and THC.

[Purpose of the invention]

This invention was made to solve the above problems, and provides a highly practical wick-type liquid fuel combustion device that can expand the variable range of thermal power and prevent the generation of harmful gases during weak combustion. The purpose is to

[Summary of the invention]

This invention provides a wick-type liquid combustion device equipped with a combustion tube in which a combustion chamber is divided into a plurality of sections corresponding to each group which is divided into a plurality of units so as to be able to burn independently. A divided fire pan is installed in the combustion chamber, and the divided fire pan is separated from the adjacent combustion chamber to make it difficult for heat to be transferred from the combustion side to the extinguishing side during weak combustion.

〔Effect of the invention〕

According to this invention, by separating the divided fire pan from the adjacent combustion chamber, the heat transfer to the flame-extinguishing side is reduced during weak combustion, and the heat input to the wick can be kept constant.
It is possible to prevent uneven combustion and improve combustion exhaust gas performance during weak combustion, and it is also possible to achieve uniform combustion and prevent the generation of combustion intermediate products. Moreover, since the temperature rise of the flame-extinguishing side split fire pan can be suppressed to a low level during weak combustion, fuel evaporation from the flame-extinguishing side is extremely reduced, and generation of fuel gas can be prevented.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, 1 is a combustion tube, and this combustion tube 1 has an inner flame tube 3 with ventilation holes 2 formed on its entire surface, and on the outside thereof,
An outer flame cylinder 6 having a large diameter ventilation hole 4 in the upper part and a small diameter ventilation hole 5 in the lower part is arranged concentrically, and an outer cylinder 7 is arranged concentrically outside the outer flame cylinder 6. inner flame cylinder 3
．． Outer flame cylinder 6. The outer cylinder 7 is fixed with a degree of freedom by cross pins, and a glass cylinder 8 is further disposed on the outer cylinder 7 to radiate the radiant heat of the outer flame cylinder 6 to the outside.

Combustion chambers 9, 9 are formed in an area surrounded by the inner flame tube 6 and the outer flame @7, and are divided into a plurality of chambers by partition plates 10 and 10.

Below each combustion chamber 9, 9 is provided a split wick 11, 11 which burns independently. These split cores 11
．． Annular fire pans 14 and 15 that support the combustion tube l are integrally provided at the upper ends of the wick guide tubes 12 and 13 that guide the combustion tube l,
A fence is formed by bending the peripheral edge upward to prevent fuel from flowing out.

Above the fire pan 14 located on the outside is a split fire pan 16 with an inverted cross-sectional shape as shown in FIG. (16) is placed. The divided fire pan 16.16 is cut at the boundary with the adjacent combustion chamber 9.9 and is thermally isolated. In the illustrated example, a gap is provided between the fire pan 15 and the split wick 11 so that heat is difficult to transfer from the fire pan 15 located on the inside to the split wick 11.

Now, when ignition is performed by an ignition device (not shown) with both split wicks 11.11 raised, combustion is started by air ζ flowing in from the vent holes 2.5 of the inner flame tube 3 and the outer flame tube 6.

The combustion heat is transferred to the divided wicks 11.11 by radiation and heat conduction from the divided fire pans 16.16, increasing evaporation and shifting to steady combustion.

Here, when one of the split wicks 11.11 is extinguished in order to adjust the firepower, on the combustion side where combustion continues.

The temperature is maintained at the same state ζζ, and is lowered on the extinguishing side.
descend. The same can be said about this temperature difference for the divided fire pans 16 and 16. At this time, since the divided fire pans 16 and 16 are separated and thermally separated near the partition plates 1o and Io, which are the boundaries with the flame-extinguishing side, heat transfers from the combustion-side divided fire pan 16 to the flame-extinguishing side divided fire pan 16. The temperature of the combustion-side split grate 6 is uniform in the circumferential direction.

As a result, the heat input to the combustion-side split wick 11 becomes constant, resulting in uniform fuel evaporation. On the other hand, in the flame-extinguishing side split wick 11, there is almost no transfer of heat from the combustion side split wick 11 during combustion, and the temperature of the flame-extinguishing side split wick 16 is kept low, preventing the evaporation of fuel from the flame-extinguishing side split wick 11. It can be suppressed.

Therefore, according to such a configuration, an air layer is interposed between the fire pan 15 and the divided fire pans 16, 16 to thermally separate the fire pans 16, 16 from the adjacent combustion chambers 9, 9.
By separating at the boundary and thermally separating the two, it is possible to suppress the heat transfer to the flame-extinguishing side split wick 16 to the minimum possible level during weak combustion, thereby stabilizing the heat input to the combustion side split wick 11 and ensuring uniform evaporation. is obtained. In this way, when the amount of fuel evaporation occurs uniformly in the circumferential direction, the combustion takes place by effectively using the ventilation holes 2 and 5 provided in the inner flame tube 3 and the outer flame tube 6I, and the flame becomes stable. , THC, and other harmful combustion intermediate products can be prevented. Further, since the heat transfer to the flame-extinguishing side is small and the temperature of the flame-extinguishing side split wick does not rise, generation of unburned gas can be prevented.

Next, FIGS. 4 and 5 show other embodiments of the present invention. This device has a plurality of protrusions 17 provided on the lower surfaces of the divided fire pans 16, 16 explained in FIG. are formed and thermally separated.

In this way, the protrusion 17 connects the fire pan 14 and the divided fire pan 16.
, 16 by forming a gap 18 between them.
4 and the divided fire pans 16, 16 can be thermally well separated, so that the heat transfer to the flame-extinguishing side divided fire pan 16 can be further reduced during 1-low combustion. therefore,
By separating the divided fire pans 16, 16 at the boundary between the adjacent combustion chambers 9, 9 and thermally separating them, the same effect as described above can be achieved.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.

In the above embodiment, a gap is formed between the fire pan and the divided fire pan to thermally separate them, but it is also possible to interpose a heat insulating member between the fire pan and the divided fire pan to thermally separate them.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a plan view of the embodiment, FIG. 3 is a sectional view showing essential parts of the embodiment, and FIG. 4 5 shows another embodiment of the invention, and FIG. 4 is the main part. FIG. 5 is a perspective view of the divided fire pan. 1... Combustion tube 2, 4.5... Ventilation hole 3
...Inner flame tube 6...Outer flame tube 7...Outer tube 8...Glass tube 9...Combustion chamber
10... Partition plate 11... Split core 12
．． 13... Guide cylinder 14.15... Fire pan
16...Divided fire pan 17...Protrusion 18.
...Gap Agent Patent Attorney Nori Ken Chika Yudo Yukio Yuyama Figure 1 Figure 2 Figure 3

Claims (3)

[Claims] (1) In a wick-type liquid combustion device equipped with a combustion tube in which a combustion chamber is divided into a plurality of sections corresponding to each wick that is divided into a plurality of sections so as to be able to burn independently, a fire pan that supports the combustion tube is provided. A wick type liquid fuel combustion device characterized in that a split fire pan is provided which is separated from at least an adjacent combustion chamber. (2) The wick type liquid fuel combustion device according to claim 1, characterized in that a gap is provided between the fire pan and the divided fire pan. (3) The wick type liquid fuel combustion device according to claim 1 or 2, characterized in that a heat insulating member is interposed between the fire pan and the split fire pan.