JPH1026313A - Initially mixing surface flame type burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent explosion due to igniting gas in a mixed gas chamber by a method wherein a pilot burner, equipped with an electric discharge igniting means, is installed while penetrating a combustion plate from the side of the mixed gas chamber and is positioned at the flame forming surface side of the combustion plate. SOLUTION: A pilot burner 5 is provided with a pipe 51, provided for guiding fuel gas 7, supplied from a fuel gas supplying pipe 4, to the side of flame forming surface 3A of a combustion plate 3 and consisting of a conductive metal pipe whose both ends are opened, and a spark rod 52, inserted into and fixed to the pipe. An electrode 53, bent so as to have an L-shape, is attached to the tip end of the spark rod 52 while the tip end of the electrode 53 is projected out of the opening 51A. A required voltage is impressed between the electrode 53 and the pipe 51 to generate electric discharge. Accordingly, the electric discharge ignites fuel gas 7 which flows out of the opening 51A, and flame 9 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original mixing type planar flame burner.

[0002]

2. Description of the Related Art As an original mixing type planar flame type burner,
For example, an original mixing type planar flame type burner 1 having the structure shown in FIG.
00B is known. In FIG. 7, 1 is a mixed gas supply pipe, 2 is a mixed gas chamber, 3 is a combustion plate, 4 is a fuel gas supply pipe, 5 is a pilot burner, 6 is a mixed gas, 7 is a fuel gas, and 8.9 are flames. is there.

That is, in this burner, a mixed gas 6 of a fuel gas and air containing an amount of oxygen necessary for combustion of the fuel gas is supplied to a mixed gas chamber 2 located on the back side of the combustion plate 3. Then, it is designed to pass through a number of combustion holes (not shown) and form a flame 8 distributed in a plane on the outer flame forming surface 3A to burn.

In this burner, first, a fuel gas 7 discharged from the tip of a pilot burner 5 is ignited to ignite a flame 9 as a pilot flame.
And ignites the mixed gas 6 passing therethrough to form a main flame 8.

[0005] The combustion plate 3 is formed by sintering a thick plate-like refractory material, for example, a metal fiber in a permeable state.
It is formed by opening a minute combustion hole (not shown) having a diameter of about 1 to 2 mm, and is usually used with a plate thickness of about 2 to 4 mm.

[0006] The planar flame type burner of the above construction completes the combustion faster than the premixed single nozzle type burner.
It has the advantages of reducing the amount of generated NO _X and reducing the size of the apparatus because the flame 8 does not become long, and has come to be used as a heating apparatus for a high-temperature regenerator in an absorption refrigerator. ing.

[0007]

However, in the above-mentioned conventional original mixing type planar flame type burner, a pilot burner as an igniting means is provided on the flame forming side of the combustion plate, so that the mixed gas chamber is not provided. Although the danger of explosion due to ignition of the mixed gas is small, the structure of the flame forming surface side is complicated and it is difficult to reduce the distance from the heated object, for example, the liquid pipe of the high-temperature regenerator. It may hinder miniaturization,
There is also a problem that durability is impaired because the ignition means is exposed to a high temperature, and solving these problems has been an issue.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and has a fuel gas and a mixture in which air containing an amount of oxygen necessary for combustion of the fuel gas is supplied. A gas chamber, and a combustion plate provided facing the mixed gas chamber, and having a plurality of combustion holes formed therein on the surface opposite to the mixed gas chamber through which the mixed gas of the mixed gas chamber passes; In an original mixing type planar flame type burner formed with a pilot burner as an ignition device,

A pilot burner provided with discharge ignition means is provided so as to penetrate the combustion plate from the mixed gas chamber side, and the discharge ignition means is positioned on the flame forming surface side of the combustion plate. Original mixed type flame flame type burner,

[0010] In the original mixing type planar flame type burner of the first configuration, the portion of the pilot burner gas supply path for guiding the fuel gas or the mixed gas to the discharge igniting means faces the combustion plate surface on the mixed gas chamber side, An original mixing planar flame type burner having a second configuration in which an opening is provided to allow gas to flow out,

In the original mixing type planar flame burner of the second configuration, a guide plate for guiding gas flowing out from the opening of the pilot burner gas supply passage to a combustion plate near the pilot burner is provided around the opening. An original mixing type planar flame type burner of the third configuration,

[0012] In the original mixing planar flame burner of the second or third configuration, a part of the gas flowing through the pilot burner gas supply passage flows out of the opening and passes through the combustion plate,
An original mixing type planar flame burner according to a fourth configuration, wherein an opening is also provided at the end of the pilot burner gas supply path on the side of the discharge ignition means so that the remainder reaches the discharge ignition means without flowing out from the opening. When,

[0013] In the original mixing planar flame type burner of the second or third configuration, the pilot burner gas supply so that the entire amount of gas flowing through the pilot burner gas supply passage flows out of the opening and passes through the combustion plate. A combined planar flame type burner of a fifth configuration wherein the end of the road on the discharge ignition means side is closed;

In the above-described first to fifth configurations, the pilot mixing burner gas supply passage is formed by a conductive metal pipe to constitute one of the electrodes of the discharge ignition means. The present invention solves the above-mentioned problems of the related art by providing a combined flame type burner having the configuration of (6).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. In addition, in order to facilitate understanding, in these figures, parts having the same functions as those described in FIG. 7 are denoted by the same reference numerals.

The original mixing type planar flame type burner 100 of the present invention.
Is formed by attaching the pilot burner 5 so as to penetrate the mixed gas chamber 2 and the combustion plate 3 as shown in FIG. 1 and to form the flame 9 on the flame forming surface 3A side of the combustion plate 3. Is done.

As shown in FIG. 2, for example, the pilot burner 5 is open at both ends for guiding the fuel gas 7 supplied from the fuel gas supply pipe 4 to the flame forming surface 3A side of the combustion plate 3. A pipe 51 made of a conductive metal,
Spark rod 52 inserted and fixed in this pipe
The electrode 53 bent in an L-shape attached to the tip of the spark rod 52 is formed with an opening 51.
A is configured to protrude from A, apply a required voltage between the electrode 53 and the pipe 51, and discharge between the electrode 53 and the pipe 51.

The discharge between the electrode 53 and the pipe 51 may be continuous like a high-frequency discharge, or may be one that causes a DC discharge instantaneously. Further, a configuration may be adopted in which the instantaneous DC discharge is repeated at short intervals.

Therefore, in the original mixing type planar flame type burner 100 having the above structure, when a required voltage is applied between the electrode 53 and the pipe 51 while the fuel gas 7 is supplied from the fuel gas supply pipe 4, the electrode Discharge occurs between 53 and the pipe 51, igniting the fuel gas 7 flowing out of the opening 51A to form a flame 9 (oxygen required for combustion is supplied from air outside the pilot burner 5).

For this reason, when the mixed gas 6 is supplied from the mixed gas supply pipe 1, the mixed gas 6 passing through the combustion plate 3 is ignited from the flame 9 to form a flame 8.

Further, the original mixing type planar flame type burner 100 of the present invention can be configured as shown in FIG. The difference between the original mixed planar flame type burner 100 shown in FIG. 3 and the original mixed planar flame type burner 100 shown in FIG. Forming surface 3
A portion of the pipe 51 facing the back surface 3B opposite to A,
The opening 51 </ b> B is provided intermittently in the circumferential direction so that a part of the fuel gas 7 supplied from the fuel gas supply pipe 4 flows out of the fuel gas 7 into the mixed gas chamber 2.

For this reason, in the original mixing type planar flame type burner 100 of this configuration, the fuel gas 7 flowing out of the opening 51B and passing through the combustion plate 3 around the burning fuel gas 7 flowing out of the opening 51A. Is supplied, the expanding flame 9 is formed, and ignition of the mixed gas 6 passing through the combustion plate 3 becomes easy.

Further, the original mixing type planar flame type burner 100 of the present invention can be configured as shown in FIG. The difference between the original mixed planar flame burner 100 shown in FIG. 4 and the original mixed planar flame burner 100 shown in FIG. 3 is that the fuel gas 7 flowing out from the opening 51B has a large volume. The point is that the guide plate 54 is attached so as to pass through the combustion plate 3 on the pilot burner 5 side without expanding to the mixed gas chamber 2.

Therefore, in the original mixing type planar flame type burner 100 having this configuration, the fuel gas 7 flowing out of the opening 51B is reliably supplied to the periphery of the fuel gas 7 flowing out of the opening 51A and burning. The effect of forming a wide flame 9 convenient for igniting the mixed gas 6 passing through the combustion plate 3 is enhanced.

Also, the original mixing type planar flame type burner 100 of the present invention can be configured as shown in FIG. The difference between the original mixed planar flame burner 100 shown in FIG. 5 and the original mixed planar flame burner 100 shown in FIG. 4 is that the original mixed planar flame shown in FIG. Mold burner 100
5, the fuel gas 7 supplied from the fuel gas supply pipe 4 can flow out of the openings 51A and 51B, whereas the fuel gas 7 supplied from the fuel gas supply pipe 4 flows out of only the opening 51B in the original mixing type planar flame type burner 100 shown in FIG. This is the point that the tip of the pipe 51 is closed by the tab plate 55 as shown in FIG.

Therefore, in the original mixing type planar flame type burner 100 having this configuration, the fuel gas 7 supplied from the fuel gas supply pipe 4 flows out only from the opening 51B and burns, and thus passes through the combustion plate 3. The function and effect of forming a wide flame 9 convenient for igniting the mixed gas 6 is further enhanced.

Further, the original mixing type planar flame type burner 100 of the present invention can be configured as shown in FIG. The difference between the original mixed planar flame burner 100 shown in FIG. 6 and the original mixed planar flame burner 100 shown in FIG. 5 is that the original mixed planar flame burner 100 shown in FIG. 100 in that the guide plate 54 is omitted.

Therefore, also in the original mixing type planar flame type burner 100 having this configuration, since the fuel gas 7 supplied from the fuel gas supply pipe 4 flows out only from the opening 51B and burns, it passes through the combustion plate 3. A wide flame 9 is formed which is convenient for igniting the mixed gas 6.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, the pilot burner 5 may supply a mixed gas of fuel gas and air containing an amount of oxygen necessary for combustion of the fuel gas to the ignition means.

Further, a filter for removing dust in the air may be provided at an inlet (not shown) of the air to be taken into the mixed gas chamber 2.

[0032]

As described above, in the original mixing type planar flame type burner according to the present invention, since the pilot burner as the ignition means passes through the combustion plate from the side of the mixed gas chamber, the mixed gas There is no danger of igniting the gas in the room and exploding.

Further, since the structure on the side where the flame is formed is not complicated, for example, when it is used as a heating means for a high-temperature regenerator in an absorption refrigerator, the distance from the liquid pipe of the high-temperature regenerator is reduced. And the size of the pilot burner is not exposed to high temperatures, so that its durability does not decrease.

Further, in the invention of claim 2 and the following, since the flame of the pilot burner spreads, there is an advantage that it is easy to form the main flame.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an entire configuration of a burner according to the present invention.

FIG. 2 is an explanatory view showing one configuration example of a main part of a burner according to the present invention.

FIG. 3 is an explanatory view showing another configuration example of a main part of the burner according to the present invention.

FIG. 4 is an explanatory diagram showing another configuration example of a main part of the burner according to the present invention.

FIG. 5 is an explanatory diagram showing another configuration example of a main part of the burner according to the present invention.

FIG. 6 is an explanatory view showing another configuration example of a main part of the burner according to the present invention.

FIG. 7 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 mixed gas supply pipe 2 mixed gas chamber 3 combustion plate 3A flame forming surface 3B back surface 4 fuel gas supply pipe 5 pilot burner 6 mixed gas 7 fuel gas 8.9 flame 51 pipe 51A / 51B opening 52 spark rod 53 electrode 54 guide plate 100 ・ 100B Original mixed type flame flame type burner

Claims (6)

[Claims] 1. A mixed gas chamber to which a fuel gas and air containing an amount of oxygen necessary for combustion of the fuel gas are supplied, and a mixed gas chamber is provided facing the mixed gas chamber, and the mixed gas in the mixed gas chamber passes therethrough. The original mixing type planar flame type burner formed with a combustion plate provided with a large number of combustion holes for forming a flame on the surface opposite to the mixed gas chamber and a pilot burner as an ignition device. Wherein a pilot burner provided with discharge ignition means is installed through the combustion plate from the mixed gas chamber side, and the discharge ignition means is positioned on the flame forming surface side of the combustion plate. Planar flame type burner. 2. An opening for allowing gas to flow out is provided in a portion of a pilot burner gas supply passage for guiding a fuel gas or a mixed gas to discharge ignition means, facing a combustion plate surface on a mixed gas chamber side. The original mixing planar flame type burner according to claim 1. 3. The original mixing surface according to claim 2, wherein a guide plate for guiding the gas flowing out from the opening of the pilot burner gas supply passage to the combustion plate near the pilot burner is provided around the opening. Flame type burner. 4. The pilot burner gas supply passage so that a part of the gas flowing through the pilot burner gas supply passage flows out of the opening and passes through the combustion plate, and the remainder reaches the discharge ignition means without flowing out of the opening. 4. An original mixing type planar flame type burner according to claim 2, wherein an opening is provided also at an end of the discharge ignition means. 5. A method according to claim 1, wherein the entire amount of gas flowing through the pilot burner gas supply passage flows out of the opening and passes through the combustion plate.
4. An original mixing type flat flame type burner according to claim 2, wherein an end of the pilot burner gas supply path on the side of the discharge ignition means is closed. 6. The elementary mixing surface according to claim 1, wherein the pilot burner gas supply passage is formed by a conductive metal pipe and constitutes one of the electrodes of the discharge ignition means. Flame type burner.