JPS59137710A - Liquid fuel gasification device - Google Patents

Abstract

PURPOSE:To provide a substantial reduction of generated volume of tar by a method wherein an intermittent gasification phenomeum caused by floated fuel is prevented even if a heating surface is heated up more than a boiling point of fuel under a burying of fuel supplying port into porous metalic body covering the heating surface. CONSTITUTION:Foamed metal flat plate 5 is fitted over an entire bottom surface of a container and a fuel supplying port 3 is opened in the foamed metal flat plate 5. Fuel is guided from the supplying port 1 into the container 4, discharged from the opening 3 in the foamed metal applied in the entire bottom surface of heated container so as to absorb heat from the foamed metal and the bottom surface of the container and then vaporized. At this time, even if the bottom surface of the container is heated more than so-called Leidenfrost point, a swift heat transmittance from the foamed metalic part to the fuel is performed, resulting in that a so-called film boiling phenomeum of fuel is not produced, thereby a stable gasification is performed.

Description

[Detailed Description of the Invention] (1) [Technical Field of the Invention] The present invention relates to, for example, an improvement in the structure of an apparatus for vaporizing and burning kerosene, particularly for stably vaporizing it at a temperature much higher than the boiling point of kerosene. .

[Prior art]

Blade 1 is a cross-sectional view showing the structure of a conventional kerosene vaporizer disclosed in, for example, Japanese Patent Application Laid-open No. 55-152306. In figure 2, (1) is the kerosene supply pipe, and (2) is the heater. , 13) is a kerosene supply port, and (4) is the bottom of the container heated by a heater (2) or the like.

Conventional vaporizers supply kerosene to a container (4) etc. heated by a heater (2) etc. through a conduit (13).
) etc.), and the temperature at the bottom of the container is set at 250 to 290°C in the case of kerosene.

However, the kerosene used in practical use may have deteriorated during storage, and when such kerosene is introduced into conventional equipment, it turns into tar on the inner surface of the bottom of the container (14), causing an abnormal odor when extinguished. The problem was that the kerosene supply port was blocked, making combustion impossible.

Therefore, as below.

■ A method that atomizes kerosene and supplies it throughout the hot blood to avoid oil stagnation.

■ Heat conduction to the kerosene is accelerated by the method of attaching foamed metal, etc., to the hot blood, which has unevenness on the heating surface, wire mesh 2, etc.
Efforts have been made to increase the vaporization rate of kerosene.

However, even with these methods, a lot of tar adheres.

The shortcomings were not sufficiently improved.

On the other hand, it is often said that the higher the temperature of the container bottom f11141 is by 300°C or more, the less the amount of tar generated. It may become unstable, and in the worst case, there is a risk of backfire.

[Summary of the Invention] The present invention has been made with the aim of improving such drawbacks, and by embedding the fuel supply port in a metal porous body that covers the heating surface, it is possible to heat the fuel to a temperature above the boiling point of the fuel (3). To provide a fuel vaporization device that does not cause an intermittent vaporization phenomenon (film boiling) due to floating of 1ffi fuel even when a surface is heated, and can therefore greatly reduce tar buildup.

[Fruit of invention Mri υ]

The second section is a clear view showing one embodiment of this invention;
-4 are completely similar to the above-mentioned conventional devices. (5) is a foamed metal flat plate fitted into the entire bottom of the container, and the fuel supply port is opened within the foamed metal flat plate.

In FIG. 2 the fuel is directed into the supply outlet container 14).

The opening 13) is then released into the foamed metal spread over the entire bottom of the container which has already been heated, absorbing the heat of the foamed metal and the bottom of the container and vaporizing it. At this time, even if the bottom of the container is heated to a temperature higher than the so-called Leidenfrost point,
Heat transfer from the foamed metal part to the fuel is rapid, and the b of the fuel is
The so-called film boiling phenomenon does not occur, and stable vaporization occurs. Note that in the above embodiment, a foamed metal is used as the metal porous body.

A similar effect can also be expected with other materials such as wire mesh.

(4) Also, the supply port is located above the bottom of the container, but
You can expect the same effect even if you insert it (on the side or below).

If the purpose is to continuously vaporize a liquid fuel other than kerosene in a vaporization device above the Leidenfrost point, the present invention can be applied.

[Fuel has high boiling point components and low boiling point components.

The former tends to turn into tar and remain on the vaporization surface as shown in FIG. 1; however, if the vaporization surface is heated to as high a temperature as possible, no tar will remain. For example, if you heat kerosene to 350℃, tar will be heated to 1/1 compared to heating it to 260-270℃.
It becomes 0 to 1/30. However, by increasing the temperature, the vaporization state of the fuel becomes so-called membrane temperature rise, and vaporization becomes intermittent, making it impossible to maintain a stable combustion flame, resulting in a dangerous situation.

On the other hand, the present invention has a simple structure as shown in Fig. 2.1 For example, in the case of kerosene, even if the bottom of the container (41) is heated above the Leidenfrost point of around 350°C, the vaporization can be kept completely retarded. Therefore, according to the present invention, tar generation can be sufficiently reduced, and measures for preventing tar generation (5) and measures for removing tar can be implemented and suppressed at a minimum cost.

[Brief explanation of drawings]

FIG. 1 is a curved view showing the main parts of a conventional liquid fuel vaporization device, and FIG. 2 is a curved view showing a simple embodiment of the present invention. In the figure, the mountains indicate fuel supply of 0. +21 is heater, 13
) is the opening, (4) is the bottom of the container, and (5) is the foamed gold. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Shin Kuzuno - (Su

Claims (1)

[Claims] Mountain -ff on the inner surface of a container heated above the boiling point of liquid fuel
1. A liquid fuel vaporizing device characterized in that the first or the entire surface is covered with a metal porous body, and a conduit and its open end are embedded in the metal porous body. (2) The liquid fuel vaporization device according to claim 1, wherein the bottom surface of the container is heated to 300 to 350°C. 13) The liquid fuel vaporization device according to claim 1, characterized in that the conduit projects downward from the bottom of the container, and the open end of the conduit is buried in the porous metal body. (4) Introduce the pipe line from above to the bottom of the container. 2. The liquid fuel vaporization device according to claim 1, wherein the open end of the conduit is embedded in a porous metal body.