JPS59161609A - Liquid fuel evaporating device - Google Patents

Abstract

PURPOSE:To prevent secular variation (pulsation) from occurring in evaporation, which serves to continuously keep stable combustion, and to sharply reduce the amount of tar produced during evaporation, by a method wherein metallic porous member is placed on a heating metal plate or the surface itself of the heating metal plate is processed in an uneven surface. CONSTITUTION:With an electric heater 13 energized, a metal plate 12 and a metal porous member 14 are heated to the film boiling temperature of liquid fuel. Thereafter, with the aid of a pump 22, liquid fuel is dropped on and implanted in the heated metal porous material 14 from a nozzle 21 through a liquid fuel fed feed pipe 19. A portion where the metal porous material 14 makes contact with the liquid fuel is locally reduced in temperature by the dropped liquid fuel, but the dropped fuel is entirely evaporated and the local part of the metal porous material 14 making contact with the liquid fuel is rapidly restored to a primary set temperature to perform continuous stable evaporation. Furthermore, tar content produced during evaporation is evaporated at a high temperature range as the part where the tar content makes contact with the liquid fuel is locally restored to the set temperature, and finally evaporation is carried out at the highest temperature of the set temperature.

Description

[Detailed description of the invention] The present invention relates to a liquid fuel vaporization device.

For example, the conventional German device is
There is a device such as that disclosed in Publication No. 24, and the device disclosed in the publication is shown in FIG.
FIG. 2 shows a vaporizer in the conventional vaporizer. In FIGS. 1 and 2 showing these conventional vaporizers, 1 is a breathable material, 2 is an electric heater, 3 is an outer wall cylinder, 4 is an inner wall body, and 5 is a fuel oil pipe. .

In the conventional vaporizer configured in this way, when kerosene is used as the liquid fuel, the electric heater 2 is used to preheat about 2
Kerosene was injected into the vaporization chamber through an oil pipe into the vaporization chamber, which was adjusted to around 50°C (kerosene's nucleate boiling temperature), so that the kerosene would be vaporized in as short a time as possible.

However, in such heating vaporization type oil combustion equipment on the side floor, the vaporization temperature is lower than the nucleate boiling temperature range temperature K (
(approximately 150 to 280°C), it gradually turns into tar due to polymerization of molecules within the vaporization temperature or the accumulation of minute residues (impurities), and the amount of tar increases with the passage of combustion time. If this tar accumulates on the heating vaporization surface or in the vaporization chamber, temporal fluctuations in vaporization (pulsations become large.
If tar accumulates in the flow path of the vaporized fuel gas and if fC occurs, the inflow of the vaporized fuel gas into a part of the burner is inhibited.

If tar accumulates anywhere, stable combustion will be inhibited, and the product will eventually become unusable, resulting in problems with the service life of the product.

Therefore, an object of the present invention is to improve the shortcomings of the conventional swords, and to eliminate temporal fluctuations (pulsations) in vaporization, continuously maintain stable combustion, and further improve b production during vaporization. An object of the present invention is to provide a liquid fuel vaporization device that reduces the amount of tar generated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid fuel vaporization apparatus of the present invention will be explained in more detail below with reference to preferred embodiments shown in the cooling drawings.

FIG. 3 shows an embodiment of the liquid fuel vaporization device of the present invention. In FIG. 3, 10 is a vaporizer, 11 is a vaporization chamber formed inside the vaporizer 10, 12 is a metal plate forming the bottom of the vaporization chamber 11, and 13 is arranged below the metal plate. 14 is a metal porous body placed in close contact with the metal plate; 15 is a temperature adjustment strain sensor inserted into the metal plate; 16 is a side wall that partitions the vaporization chamber 11; 17 is a part of the burner, and 18 is facing the vaporized gas discharge nozzle 16 and is spaced apart from the nozzle. an air intake port for a portion of the burner 19 which is open and arranged; a liquid fuel oil pipe 19 having one end located in the vaporization chamber 11 and the other end located in the fuel tank 20;
Reference numeral 21 indicates a lower liquid fuel nozzle which is one end of the liquid fuel supply pipe 19 and is located in the vaporization chamber 11 of the liquid fuel supply pipe 19. Reference numeral 22 indicates a pump provided on the liquid fuel supply pipe 19. Reference numeral 23 indicates a fuel tank 20.
The fuel, for example kerosene, contained therein is shown in each case.

The liquid fuel lower part of the liquid fuel oil supply pipe 19 mentioned above, Izuru 2
As is clear from FIG. 3, 1 is oriented perpendicularly to the surface of the metal porous body 14 on the metal plate 12, and its end is cut obliquely, and the tip edge of the end face is is in point contact on the metal porous body 14.

To explain the operation of the liquid fuel/fuel vaporizer constructed in this manner using kerosene as an example, the electric heater 13 is energized in advance, and the metal rice plate 12 and the metal/metal porous body 14 are exposed to the liquid fuel. It is heated to the film boiling region temperature (approximately 280° C. to maximum 350° C. for kerosene).

Next, the liquid fuel is dripped onto the heating metal plate surface 14 from the liquid fuel lower nozzle 21 via the liquid fuel feed g19 by the pump 22. The temperature of the porous metal body 14 in contact with the liquid fuel locally decreases due to the liquid fuel, but? The artist's fuel is vaporized in a short time, and the local part of the porous body that has come into contact with the dispersed fuel after vaporization returns to the initially set temperature one after another, resulting in continuous and stable vaporization. .

Historically, the tar generated during vaporization (residual boiling point vD) was vaporized in the sieve temperature range as the temperature at the contact area with the liquid fuel locally increased. Vaporization at maximum temperatures (eg 350° C.) can be carried out.

In the above-mentioned device, the porous metal is placed tightly on the metal plate, that is, the heated metal plate, and stable vaporization of the liquid fuel at a high temperature is made possible. It may also be done by processing the surface of the heated metal plate into irregularities.

In the above explanation, kerosene was used as an example of fuel, but
Of course, it can be used not only for vaporizing kerosene but also for other liquid fuels.

As explained above, when liquid fuel is injected downward into the heating metal part provided in the vaporization chamber and vaporized in the vaporization chamber, the liquid fuel and the heating metal ' In order to increase the contact area with the ViVS surface, a porous metal body is placed on the heating metal plate, or the surface of the heating metal plate itself is made into an uneven surface, so that the liquid fuel heating metal part becomes a liquid fuel film. Stable vaporization can be achieved by heating to a temperature in the boiling temperature range (approximately 280°C to 350°C for kerosene), and as a result, the amount of tar produced during vaporization can be reduced to one level.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a conventional liquid fuel vaporization device;
This figure is a cross-sectional view showing a vaporizer in the conventional liquid fuel vaporizer shown in FIG. 1, and FIG. 3 is a cross-sectional view showing an embodiment of the liquid fuel vaporizer of the present invention. DESCRIPTION OF SYMBOLS 10... Vaporizer, 11... Vaporization chamber, 12... Metal plate, 13... Electric heater, 14... Metal porous body, 19
...Liquid fuel oil supply pipe, 21...Liquid fuel lower nozzle. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 2 41-

Claims (3)

[Claims] (1) In a liquid fuel vaporizer in which liquid fuel is injected onto a heated metal part using heat such as electric peaks and vaporized and burned, the liquid fuel on the metal part to be probed and A liquid fuel vaporization device characterized in that the metal part is made of a metal porous body or a textured first surface in order to increase the contact area of the metal part. (2) Patent N! In the dispersion fuel vaporization device described in item ``Section 1'', ? iiJ ratio metal parts that come into contact with the artist's fuel are mixed with liquid fuel i1. A liquid fuel vaporization device whose purpose is to heat the fuel to a temperature in the thermal absorption region. (3) In the fuel vaporization table 16 described in Section 1 of the request for patent d1-1, 1) the nozzle for discharging several fuels onto the surface of the heating button 1J is sharply cut; A liquid fuel vaporization device whose end face is installed so that the lowest part of the end face is in point contact with the 6th face of the 1k metal part on the t410 side.