JPH0116896Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a burner for a vaporization type combustor, and more particularly to a burner for a vaporization type combustor in which an oil reservoir for storing liquid fuel is provided at the bottom of a mixing tube of a Bunsen burner.

[Technical background and problems of the invention]

A vaporization type combustor uses a pump to gasify kerosene in a vaporization pipe, guides the vaporized gas to a nozzle, and when the vaporized gas is ejected from the nozzle, sucks in primary air to generate an air-fuel mixture in a mixing pipe. , this mixture is ignited to form a combustion flame.

Figure 1 shows this type of vaporization type combustor, in which kerosene stored in an oil tank 1 is supplied to a vaporizer 4 via a vaporization pipe 3 by a pump 2, and is converted into electric heat from a sheathed heater. It is then vaporized. The vaporized fuel gas is supplied to a nozzle 6 through a needle valve 5 and is injected toward a mixing pipe 8 of a burner body 7. When the fuel gas is ejected from the nozzle 6, primary air is sucked in from the surrounding area due to the ejector effect, and the fuel gas and primary air are mixed in the mixing tube 8 to form a combustible mixture, and this mixture is sent to the flame port of the burner body 7. 9 and is ignited to form a flame.

In the vaporization type combustor configured in this way, if the temperature of the vaporizer 4 drops abnormally, or if the pump 2 is activated before the vaporization temperature of kerosene is reached, vaporization will occur from the nozzle 6 into the mixing tube 8. The unused liquid kerosene will be squirted out. This liquid kerosene gradually accumulates at the bottom of the mixing tube 8, and when the liquid level exceeds the minimum diameter portion of the mixing tube 8, it flows out toward the inlet. Therefore, in the past, an oil drain hole 10 was formed below the inlet of the mixing pipe 8, and a saucer 11 for receiving the liquid fuel was disposed directly below the oil drain hole 10, and the liquid fuel dripped into the saucer 11. is returned to the tank through the drain pipe 12.

However, in the conventional vaporization type combustor configured in this way, kerosene accumulates over the entire length of the bottom surface of the mixing tube 8, and the liquid level exceeds the minimum diameter part of the mixing tube 8. Since it does not overflow to the outside unless it exceeds the limit, early detection of abnormalities tends to be delayed.
It is also very dangerous if a large amount of kerosene accumulates at the bottom of the mixing tube.

[Purpose of invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a burner for a vaporizing combustor that can quickly guide kerosene accumulated at the bottom of a mixing tube to an oil drain hole.

[Summary of the idea]

In order to achieve the above object, the present invention provides a burner in which gasified liquid fuel is supplied to the inlet of the mixing pipe of the burner body through a nozzle.
An oil reservoir is provided at the bottom of the minimum diameter part of the mixing tube, and an oil drainage hole is provided on the upstream side of this oil reservoir to locally collect oil droplets ejected into the mixing tube from the nozzle into the oil reservoir. The liquid fuel overflowing from the reservoir is guided to the oil drain hole so that abnormal combustion conditions can be detected from the outside.

[Example of idea]

Hereinafter, the burner for vaporization type combustor according to the present invention will be described.
The explanation will be given with reference to FIGS. 2 and 3, in which the same parts as in the figures are denoted by the same reference numerals.

2 and 3 show the main parts of the mixing tube 8 of the combustor burner, and the mixing tube 8 is the third
Consisting of two molded plates 14 and 15 whose mating surfaces include the vertical line Y-Y in the figure, both are fixed by caulking a caulking piece 14a bent and formed on the outer edge of one of the molded plates 14. It is becoming more and more common. The mixing tube 8 is composed of an inlet tube 16 into which the nozzle 6 enters, a throat 17, and a widening tube 18. An oil reservoir 19 having a length l is formed at the bottom of the mixing tube 8 from the minimum diameter portion of the throat 17 toward the downstream side. This oil puddle 19
By forming recesses on both sides of the molded plates 14 and 15 by press working and bringing them together, the oil reservoir 19 that is open only upward can be formed. Further, the heights of the leading edge and the trailing edge of the oil reservoir 19 along the gas flow direction are different, and the height of the trailing edge on the upstream side is lower than the leading edge on the downstream side. has been done.

Also, the volume a [mm ³ ] of the oil reservoir 19 is
The size may be about 1/10 to 1/20 of the volume of the portion sandwiched between the two surfaces of the mixing tube 8 cut at the front and rear ends of the tube 9. For example, when S=283 mm ² in the figure and l is 32 mm, the volume a of the oil reservoir 19 is 0.45 to 0.9 C.

Furthermore, an oil drain hole 10 is formed on the lower surface of the inlet pipe 16 of the mixing tube 8 on the upstream side of the oil reservoir 19, and a tongue piece 20 is provided at the outlet end of the oil drain hole 10 to guide the outflow of kerosene. is formed.

Since the mixing tube 8 according to the present invention is constructed in this manner, the oil droplets of kerosene contained in the fuel gas ejected from the nozzle 6 into the mixing tube 8 are diffused through the nozzle 6. However, since the oil droplets have a higher specific gravity than the gas fuel, they fall to the bottom of the mixing tube and are stored in the oil sump 19. When the liquid level of kerosene in the oil sump 19 rises and exceeds the minimum diameter part of the throat 17, it overflows from the trailing edge of the oil sump 19 and flows toward the oil drain hole 10, preventing abnormal combustion from outside. Can be detected. Then, the kerosene is guided by the tongue piece 20, drips into the drain receiver 11, and is collected in the tank.

[Effect of idea]

As described above, according to the present invention, droplets of kerosene ejected from the nozzle into the mixing pipe are stored in the oil reservoir formed at the bottom of the throat, and when a predetermined amount of liquid fuel has accumulated, the oil drain hole is opened from the trailing edge. By directing the flow toward the mixing tube, abnormal combustion conditions can be detected, distinguishing them from temporary oil droplets that can be seen even during steady combustion. The safety of the device can be improved without causing a fire accident due to ignition of oil droplets.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional burner for a vaporization type combustor, Fig. 2 is a side view showing the main parts of the mixing tube of the burner according to the present invention, and Fig. 3 is an end view as seen from the inlet of the mixing pipe. It is. 7... Burner body, 8... Mixing pipe, 10... Oil drain hole, 16... Inlet pipe, 17... Throat, 19
...Oil puddle.

Claims (1)

[Claims for Utility Model Registration] 1. In a burner in which gasified fuel gas is supplied through a nozzle to the inlet of a mixing pipe of the burner body, an oil reservoir of a predetermined volume is provided at the bottom of the minimum diameter part of the mixing pipe. At the same time, an oil drainage hole is formed on the upstream side of this oil sump, and the height of the trailing edge on the upstream side of the oil sump is set lower than the height of the leading edge on the downstream side, so that the liquid fuel in the oil sump is drained. A burner for a vaporizing combustor, characterized in that oil can flow out toward the drain hole. 2. A request for registration of a utility model characterized in that the volume of the oil sump is set within the range of 1/10 to 1/20 of the volume of the portion of the mixing pipe corresponding to the length of the oil sump at the oil sump formation position. A burner for a vaporizing combustor according to item 1.