JPS60228808A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To enable to easily remove tar by burning the titled burner with no- fuel by a structure wherein a heat insulating layer made of material, the heat conductivity of which is 1kcal/m.hr. deg.C or less, is provided at the upper part of a wick guide tube. CONSTITUTION:A heat insulating layer made of material, the heat conductivity of which is 1kcal/m.hr. deg.C or less, is provided at the upper part of a wick guide tube. For example, the upper part of the wick guide tube is worked in recesses, in which inorganic paint, the heat conductivity of which is about 0.4kcal/m.hr. deg.C, is painted and baked and, after that, finish to obtain smooth wick guide surfaces. Thus, a kerosene vaporizing surface and a depositing place of tar locate higher than a fire pan, resulting in reducing the deterioration of performance due to the deposition of tar.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wick vaporizing liquid fuel combustor.

The structure of the conventional example and its problems The so-called siphon-up combustor, which sucks up liquid fuel by capillary action and vaporizes it at the tip, is used in kerosene stoves and kerosene stoves.
7 burners, widely used in oil braziers, etc. This type of combustor has the problem of tar depositing on the wick and reducing the amount of combustion over time.

Hereinafter, a conventional combustor will be explained with reference to the drawings.

Figure 1 (,) is a cross-sectional view of a conventional combustor, where 1 is a lamp wick;
2 is a fire pan, 3 is a wick guide tube, 4 is an inner flame tube, 5 is an outer flame tube, 6
7 is an air hole, 7 is a flame, and (b) is an enlarged view of the main part.

In most cases, the heat conductivity of the fire pan, inner flame tube, and outer flame tube is approximately 36.
It is made of stainless steel with Kcal, 7m, hr, deg. To explain the operation of the combustor with the above configuration, liquid fuel passes through the wick 1 and evaporates from the tip due to capillary action, and is mixed with air supplied from the air holes 6 of the inner flame tube 4 and the outer flame tube 5 to form the flame 7. It burns. However, the above configuration has the disadvantage that tar accumulates on the lamp wick 1 and the fire pan 2, causing problems as a combustor.

OBJECTS OF THE INVENTION The present invention aims to alleviate such problems caused by tar accumulation.

Structure of the Invention In order to achieve this object, the present invention has a structure in which a thermal insulation layer made of the following material having a thermal conductivity I K cal of 7 m, hr, deg is provided on the upper part of the core guide cylinder. With this configuration, the temperature of the fire pan becomes high and tar does not accumulate, and the temperature of the wick is low, so that the gas-liquid interface where tar is generated is located above the fire pan, and tar can be easily removed by dry firing.

Description of examples An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a partially enlarged view of the first embodiment of the present invention. In the same figure, 8 is the thermal conductivity I K ca
l, 7m, hr, deg, is a thermal insulation layer made of the following materials. In this example, the thermal conductivity is approximately 36
K cal, 7m, hr, deg, Thickness Q, 5
mm stainless steel core guide cylinder upper part approximately IQ mm to a depth of 0.
Processed into a concave shape of 75,711 m, the thermal conductivity is approximately 0.6
Kcal, 7m, hr, deg.

The glass hollow was fused to create a smooth core guide surface.

This combustor has a boiling point range of 155 to 325°C, an average boiling point of 21
When heavy kerosene at 5°C is burned, the temperature of the fire pan is 215°C (
The temperature of the wick at the same height as the fire pan increases from 170°C (without thermal insulation layer) to 150°C.
It dropped to 'C. As a result, the kerosene vaporization surface and tar deposition area were placed above the fire pan.

When the combustion amount change is measured while burning the heavy kerosene in this combustor, the result is shown in FIG. 3. In the figure, characteristic line 1 is the result of this example, and when compared with characteristic curve 2 of the conventional example without a thermal insulating layer, the combustion amount change characteristics were significantly improved. After the test, we compared the state of tar accumulation. In the conventional example, it was concentrated in the wick about 2 to 3 feet below the fire pan, but in this example, it was dispersed and accumulated in the wick above the fire pan. did.

For this reason, in conventional methods, tar is not removed even after dry firing.
In contrast, the tar in this example can be removed by dry firing, although the amount of combustion is not recovered.

Next, a second embodiment will be described. As in the first embodiment, the upper part of the core guide tube was machined into a concave shape, and an inorganic paint with a thermal conductivity of about 0.4 Kcal, 7 m, hz, deg was baked on the tube to create a smooth core guide surface. did. When the fire pan temperature and lamp wick temperature were measured under the same conditions as in Example 1, they were 245°C and 245°C, respectively.
The temperature reached 147°C, and the kerosene vaporization surface and tar deposits were above the fire pan. When the change in combustion amount was measured, characteristic curve 3 in Figure 3 was obtained, and the characteristics were significantly improved when compared with the conventional example. The tar deposition state after the test was the same as in Example 1,
Tar can be removed by dry firing.

Effects of the Invention As described above, the present invention has a thermal conductivity of IK at the top of the core guide tube.
Cal, 7m, hr, deg. By providing a thermal insulating layer made of the following materials, performance deterioration due to tar deposition can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional combustor, FIG. 2 is a sectional view of a main part of a combustor according to an embodiment of the present invention, and FIG. 3 is a characteristic diagram of changes in combustion amount. 1...Light wick, 2...Grill, 3...
... Core guide tube, 8... Heat insulation layer. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (2)

[Claims] (1) Thermal conductivity I Kcal, 7m, at the top of the core guide tube.
hr, deg. Liquid fuel combustor with a thermally insulating layer made of the following materials: (2) Thermal conductivity I K cal, 7 m, hr, deg,
The liquid fuel combustor according to claim 1, wherein the following materials are selected from the group of glass enamel and inorganic paint.