JPS5952112A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To obtain a stabilized atomization characteristic to the change in the feeding rate of fuel oil, by fitting a porous material to the inside wall of a cylindrical rotator, having a bottom, to which injection ports are provided. CONSTITUTION:Fuel dripping into a cylindrical rotator 13 passes through it, filling the pores of a porous material 19 by the capillary action of pores and the centrifugal force of the rotator, and is injected from one or a plural number of injection port(s) 20 (round hole(s), oblong hole(s), slit(s), etc.) provided on the side wall of the rotator to form atomized particles on it. By fitting the porous material to the inside of a cylindrical rotator having injection ports on its side wall, semi-transparent buffer resistance body is formed on the material if the fuel oil is fed getting out of position to some extent or its feeding rate is changed; ununiformity in quantity of generation of fine particles of fuel and the injecting direction of fuel particles do not occur the fuel is atomized in a wide range with stabilized atomization characteristic; and it is widely spread over the vaporizing surface of a vaporizing chamber; so that deviation of fuel load can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used in a relatively small heat generation system, such as an oil fan heater, and is desired to have a wide range of thermal power adjustment. This device relates to a liquid fuel combustion device using a vaporization premixing method in which the fuel particles are atomized and sent to the high-temperature part of the vaporization chamber for vaporization. The aim is to reduce the vaporization load and achieve stable combustion.

As shown in Figures 3 and 4, conventional liquid fuel combustion devices using the vaporization premixing method either have a tilting metal on the rotating body or have a tilting metal formed at one end from the rotating body in order to reduce the localized vaporization load. Because the structure was such that it was arranged on four axes with the rotating body in order to collide and crush the liquid flow and particles again, the diameter of the decay particles generated from the entire periphery of the rotating body was not uniform, and furthermore, Atomization M and directionally lean toward H. In addition, fluctuations in refueling fuel directly affect the particle size of the atomized atomization generated.
cause In other words, stable sagging characteristics cannot be obtained,
This causes a localized load on the vaporization surface of the vaporization chamber. Therefore, the evaporation rate is different, and the flame is slightly sluggish9p.
f will be exhibited, so either increase the premixing distance # or
This method has the disadvantage of requiring complicated mixing means.

The present invention solves the above problems by carefully considering the above drawbacks and creating several porous phases inside the side wall of a bottomed cylindrical rotating body having ejection holes (round holes, elongated holes, slits, etc.) in the wall of fll11. It is something to do. An example of a plant according to the present invention will be explained below based on FIGS. 1 and 2.

In Figs. 1 and 2, 1 is the oxidation chamber with a fan casing 2. Motor casing 3 and pump casing 4
are connected to each other to form one atomization unit, which is attached to the upper part of the fuel tank chamber 5. In one case, the pump casing 4 is exposed to the liquid level in the fuel tank chamber. The fan impeller 6 and the pump impeller 1 are fixed on a motor rotating shaft 8 and driven by a motor 9. 11-1 of the pump casing 4 is inside the unit.
An oil feed path 10 is interposed that communicates the atomization chamber 1 with the atomization chamber 1. Pi-to-pass route 1 branched from a part of the oil supply route 10
1 is provided with a relief valve 12 that adjusts the bypass pressure, and controls the supply of oil to the cylindrical rotating body 13 in the atomization chamber 1. The pump casing 4 is provided with a communication port 14 that fully communicates with the suction side and the fuel tank 5. An interlocking sleeve 17 is interposed in the fuel damper 16 in the fuel conversion chamber 1 to interlock the air damper 16.
As a result of the operation, the degree of opening of the opening part of the air damper 16 and the opening part of the air damper 16 change together. =! In addition, the supplied fuel passes through the space of the porous phase 19 that is covered with salt in the cylindrical rotating body, and passes through one or more ejection holes (round holes, long holes) on the side wall.

Slit etc.) From 20? be changed. atomized fuel
(With the fuel damper 15, the combustion rate can be varied over a wide range while always maintaining the lowest white nitrogen fuel ratio. Near the atomized fuel 11 outlet 1118, A return oil passage 21 is provided which communicates the atomization chamber 1 with the fuel tank chamber 1, and the atomization 1'17r generated from the ejection hole 19 of the cylindrical rotating body 13 is transferred to the fuel damper. The particles left behind by 221-1 are flowed into the fuel oil tank chamber.
-J-digit return pine for recirculation.

-1-Remarks on groove formation-C1 First, after the valley of the vaporization chamber 23 reaches a predetermined temperature and preheating is completed, the motor 9 is connected to the cylindrical rotating body 13. The fan impeller 6 and the pump impeller 7 rotate, and the filler in the former tank chamber 5 is continuously pumped into the cylindrical rotating body through the oil feed path 10. The fuel that has flowed into the circumferential, fold-down body 13 rises to the centrifugal force and passes through the gap in the porous hole 19, filling one or more ejection holes (round holes) in the side wall. , long, slit, etc.) 20 to generate atomized particles.

A part of the spun particles is selectively sent to the vaporization chamber 23 by the fuel damper 16, and the remaining fuel is returned to the fuel tank chamber 6 from the oil passage 21 through the return pipe 22 for recirculation and is recirculated. Some selected atomized particles are in the vaporization chamber 2.
The gas contacts the high-temperature wall of No. 3, becomes vaporized gas, forms a premixed gas with air, and heads toward the burner section (not shown).

Conventionally, when using a rotating body, the thickness of the liquid film on the disk or cup is gradually thinned by the physical properties of the liquid used (surface tension, viscosity, etc.) and the centrifugal force of the rotating body, and the liquid film is gradually thinned from the circumference of the rotating body in the form of droplets. Scattering and fine particles are generated either in the form of strings or films, but strict precision is required in the position of the oil supply to the rotating body, and if the oil supply position deviates from the position of the oil supply position, it may cause uneven distribution on the surface of the rotating body. The thickness of the liquid film does not develop, causing wavy ridges, etc., and the amount of fuel particles generated around the circumference of the rotating body becomes partially uneven and shifted, and these particles move from time to time. This phenomenon occurs. Therefore, the density of the atomized fuel passing through the opening of the fuel damper has phase or temporal irregularities, and when the combustion impulse is adjusted, it does not show a smooth continuous change, and the adjustment is not fixed at a constant level. Occasionally, the flame can be seen to be breathing due to uneven vaporization.

On the other hand, the present invention < it! II Wall vC outpost (round hole).

By inserting a porous material into the inside of the cylindrical rotating body with a slotted hole (elongated hole, slit, etc.), flow lubrication of fuel 9'.1 is carried out from 1 to 1.L; A semi-transparent buffer resistor is formed against changes in i, and unevenness in the direction of generation and injection of fuel fine particles that are generated and processed is not affected. As a result, the atomization is carried out over a wide area while maintaining stable change characteristics, and is also widely distributed to the vaporization surface of the vaporization chamber, thereby reducing a partially uneven load.

And since the amount of vaporization changes in proportion to the damper's opening [14 yen], the flame power can be adjusted infinitely, and the effect is that there is no flame breathing phenomenon. It will be done.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view showing an actual case of the liquid fuel combustion device of the present invention; 3 figures and pr!
,' Figure 4 t is a thin sectional view showing a conventional rotating body and vaporizing section. 1... Atomization chamber, 6... Fuel tank chamber, 6...
...Fan impeller, OK...Bon fan impeller,
10... Oil supply path, 13... Rotating body, 14...
... Rensai 1'', 19 ... porous material, 20 ...
...Gushing, 21...Return oil path, 23...
Vaporization chamber, 13-a, 13-1) - Rotating body. Name of agent: Ben Misaki Toshio Nakao and 1 other person 1st
Figure 2 (a) Figure 3

Claims (1)

[Claims] It has a heating section for atomizing the liquid fuel and vaporizing the atomized fuel particles using the centrifugal force of the rotating body, provided that: 1. 4111A liquid fuel combustion device in which the rotating body has a substantially cylindrical shape with ejection holes in the wall, and a porous phase is installed inside the side wall of the rotating body.