JPH018807Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a wick used in liquid fuel combustion devices widely used in oil stoves, oil stoves, and the like.

Structure of conventional example and its problems Generally, this type of lamp wick is used in a suction vaporization type liquid fuel combustion device. The tip of the lamp wick 1 exposed in the combustion chamber 3 formed by the cylinder 2, that is, the surface of the fuel vaporization section 1a, is vaporized and burned. However, in a liquid fuel combustion device using this type of lamp wick 1, since the fuel vaporization section 1a is exposed to a high temperature and oxygen-containing atmosphere, a portion of the fuel f contained in the fuel vaporization section 1a during combustion. A phenomenon in which the fuel vaporized portion becomes a tar-like substance t due to oxidation and polymerization reactions, etc., and is accumulated in the fuel vaporization portion 1a has easily occurred. Especially when trace amounts of high boiling point components are mixed into the fuel or some of the fuel components are altered,
The production and accumulation of tar-like substance f had increased significantly. When this tar-like substance f accumulates in the lamp wick 1, especially in the fuel vaporization part 1a, the uptake and vaporization of the fuel f is inhibited, the amount of combustion is abnormally reduced, and odor, soot, toxic carbon monoxide, etc. are generated frequently. There were also dangerous conditions such as prolonged unstable transient combustion during ignition, and the inability to move the wick up and down.

Purpose of the invention This invention solves these conventional problems.By suppressing the formation and accumulation of tar-like substances in the lamp wick, stable and high-quality combustion can be maintained for a long period of time, and the lamp can be safely burned. The purpose is to provide lamp wicks with excellent properties.

Structure of the Invention In order to achieve the above object, the present invention provides a paint consisting of an inorganic pigment, anhydrous silicic acid, and a surfactant in the fuel vaporization part of the lamp wick, below the fuel vaporization part, and in the vaporization lower part in close proximity to the fuel vaporization part. By impregnating the lamp with the lamp, it has the effect of preventing the formation and accumulation of tar-like substances in the lamp wick.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a cross-sectional view of the main parts of a liquid fuel combustion device using a lamp wick according to an embodiment of the present invention, in which dovetail 1 is a lamp wick, and its tip is a combustion chamber formed by a combustion tube 2. 3, and this tip part is the fuel vaporization part 1a, from which the fuel f
is vaporized. A lower part of the fuel vaporizer 1a is provided below the fuel vaporizer part 1a, and is not exposed to the combustion chamber 3. Ceramic fiber (silica: alumina≒50:
50% by weight) and polyacrylic ester used as an example of an organic binder. Further, the fuel vaporization portion 1a and the vaporization lower portion 1b are impregnated with a paint 4 consisting of an inorganic pigment containing manganese dioxide as a main component, silicic anhydride, and a surfactant. Reference numerals 5 and 6 are an outer wick tube and an inner wick tube that guide the lamp wick 1 in the vertical direction. In addition, the combustion tube 2 has an air hole 7.
are provided in large numbers, and flame holding 8 is often attached during combustion.

In the above configuration, the liquid fuel f is sucked up from the lamp wick 1, vaporized, mixed with the air a flowing in from the air hole 7 in the combustion chamber 3, and combusted. Here, the operation of this embodiment will be explained in detail in comparison with the conventional example along with the flow of fuel f.

Figure 3 shows a conventional lamp wick 1 made of ceramic fiber.
An example of a cross section of the main part is shown. Further, FIG. 4 shows a lamp wick 1 made of ceramic fiber in which only the upper part of the fuel vaporization part 1a is impregnated with paint 4. Figure 5 shows
The entire fuel vaporization part 1a is impregnated with paint 4,
FIG. 6 shows the fuel vaporization section 1 according to this embodiment.
Fig. 4A shows a cross-sectional view of the main part of the vaporized lower part 1b impregnated with the paint 4. That is, the fuel f (solid arrow) is sucked up inside the lamp wick 1 and vaporized from the surface of the fuel vaporization section 1a. At this time, in the conventional example shown in FIG. 3, during steady combustion, the fuel vaporization section 1a reaches a high temperature (approximately 180°C to 220°C), so the fuel f is sucked up to the surface of the fuel vaporization section 1a by capillary action. It doesn't go up. For this reason, the fuel f becomes easily vaporized from inside, and the high boiling point components and degraded components (white arrows), which are the main factors for the generation and accumulation of tar-like substances, also stay and accumulate inside the fuel vaporization section 1a, causing tar-like substances to form. substance t
It changed and accumulated. Furthermore, as shown in FIGS. 4 and 5, in cases where only the upper part of the fuel vaporization section 1a is impregnated with the paint 4, or where the entire fuel vaporization section 1a is impregnated with the paint 4, the paint 4 is The surface of the impregnated fuel vaporization section 1a becomes somewhat occluded, and the capillary diameter becomes small, so that the fuel f
is sucked up to the surface of the fuel vaporization section 1a even during steady combustion.

Along with this, high boiling point components and degraded components are also pushed out to the surface of the fuel vaporization section 1a, and are easily decomposed and vaporized under the influence of the flame stabilization 8 and the like. In addition, high boiling point components and degraded components are exposed to the action of an oxidation catalyst such as manganese dioxide contained in the paint 4, and are removed from the fuel vaporization section 1a.
It is also decomposed from the inside and becomes easily vaporized. but,
The vaporization section 1b below the fuel vaporization section 1a is also at a certain high temperature. (approximately 150° C. to 180° C.) Therefore, the high boiling point components and degraded components are gradually affected by the temperature in the vaporization lower part 1b and are about to change into tar-like substances t. This component that is becoming a tar-like substance is contained in the fuel vaporization section 1a impregnated with the paint 4.
However, since decomposition and vaporization are not easy, the generation and accumulation of tar-like substances cannot be sufficiently suppressed.
However, as shown in FIG. 6, in the wick according to this embodiment, the paint 4 is also present in the vaporizing lower part 1b.
Since the high boiling point components and altered components are gradually decomposed by the action of manganese dioxide etc. from the vaporization lower part 1b, the fuel is also vaporized without changing into high boiling point components. Since the tar-like substance t is supplied to the section 1a, generation and accumulation of the tar-like substance t hardly occur. Incidentally, Fig. 7 shows the results of combustion using a suction vaporization type liquid fuel combustion device. The fuel used was a mixture of white kerosene and salad oil at 0.1 vol%, and when comparing the effects on the reduction in calorific value, the fuel vaporization section 1a,
It can be seen that the one in which the vaporizing lower part 1b is impregnated with paint has a significantly better calorific value maintenance property. ○ indicates this example, □ indicates that the entire vaporization section is impregnated with paint, △ indicates that the upper part of the vaporization section is impregnated with paint, and ● indicates the conventional example.

Effects of the invention The lamp wick of the invention has a fuel vaporization section 1a and a vaporization lower section 1.
By impregnating B with a paint consisting of inorganic pigments, silicic acid anhydride, and surfactants, (1) the generation and accumulation of tar-like substances in the wick vaporization section can be prevented, and the amount of combustion can be reduced during long-term use. It is possible to always provide stable and high-quality combustion without causing a decrease in combustion.

(2) By preventing the generation and accumulation of tar-like substances, it is possible to avoid extremely dangerous situations where the lamp wick cannot be moved up and down due to sticking of the wick to the outer wick tube or the inner wick tube due to tar-like substances.

etc., it maintains stable and high-quality combustion over a long period of time, and provides excellent safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main part of a liquid fuel combustion device using a conventional lamp wick, and FIG. 2 is a sectional view of the main part of a liquid fuel combustion device using a lamp wick according to an embodiment of the present invention.
FIGS. 3, 4, 5, and 6 are diagrams for explaining the operation of the lamp wick, and FIG. 7 is its characteristic diagram. 1... Lamp wick, 1a... Fuel vaporization section, 1b... Vaporization lower part, 4... Paint.

Claims (1)

[Scope of utility model registration request] A lamp wick made of a porous body made by adding a small amount of organic binder to ceramic fibers has a fuel vaporizing section that vaporizes fuel at the tip of the wick, and a fuel vaporizing section located below the fuel vaporizing section and connected to the fuel vaporizing section. A wick in which the lower part of the vaporizer, which is in close contact with the combustion chamber and is not exposed to the combustion chamber, is impregnated with a paint consisting of an inorganic pigment mainly composed of manganese dioxide, silicic acid anhydride, and a surfactant.