JPH05346232A - Igniter for large number of gas burner and heating furnace using said igniter - Google Patents

Abstract

PURPOSE:To enable positive ignition by simple structure, and to ignite all of a plurality of gas burner groups by one-time operation by igniting a combustible gas at the arbitrary position of a combustible-gas flowing pipe. CONSTITUTION:When a combustible gas is flowed in through an opening-closing valve from one end side of a pilot flame pipe 5, the gas is ejected from these pinholes 4 of the pipe 5 and the combustible gas blown off from the pinhole 4 at the arbitrary position of the pipe 5 is ignited, the gas from the adjacent pinholes 4 is ignited successively, and a pilot flame can be ignited extending over the whole pilot flame pipe 5. Since structure, in which the pinholes 4 for pilot-flame combustion are communicated mutually by a recessed groove 3, is formed, the gas is ignited continuously in the lateral direction positively when the gas is ignited at one position, and the flame is not put out easily. When gas pipes are passed through each gas burner 2 and the combustible gas is supplied, the burners are ignited easily because there are the pilot flames near a combustion surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter capable of igniting a large number of gas burners arranged side by side in a single ignition operation, and a heating furnace using such an igniter.

[0002]

2. Description of the Related Art An apparatus equipped with a large number of gas burners is, for example, a rice cracker baking furnace. As shown in FIG. 1, this is a stainless steel lower endless wire mesh conveyor (20) that moves by placing rice cracker dough in a long continuous firing furnace,
These rice cracker dough is sandwiched between the lower endless wire mesh conveyor (20) and fired, and is also made of stainless steel upper endless wire mesh conveyor (21), and continuously above and below the passage surface of the rice cracker dough in the furnace, respectively. Installed a number of gas burners (22), the upper and lower wire mesh conveyor (2
0) The rice cracker dough sandwiched by (21) is heated by the upper and lower burners (22) to bake the dough to obtain a rice cracker.

Such a firing furnace is usually divided into parts called a preheating part (A), an expanding part (B) and a coloring part (C) in order from the entrance side for feeding the dough. The dried rice cracker dough is first dried and preheated in the preheating section, then expanded in the expansion section to a desired size, and then baked in the coloring section with a preferable baking color.

[0004]

A large number of gas burners are used as heat sources in the above firing furnace. For example, in the firing furnace of FIG. 1, the preheating section (A) is composed of four burner blocks (23a), but each block (23a) has four gas burners (22) above and below, and the expansion section (B). ) Is equipped with burner blocks (23b) each having 10 gas burners (22) above and below, and the coloring part (C) is composed of four burner blocks (23c), and each block (23c) is the upper four, It has three lower gas burners (22). Therefore, a total of 80 gas burners are used in the entire firing furnace.

As a method of igniting these gas burners, for example, each gas burner is provided with a manual or electric opening / closing plug of combustible gas, and each opening / closing plug is opened one by one with a single fire source. I was igniting the gas burner. Alternatively, an electromagnetic ignition device that generates a spark is provided near each combustion surface of each burner, and each gas burner is automatically activated by opening the electric opening / closing plug of each gas burner by remote control and operating the ignition device. There is also a way to ignite.

In the former method, however, since the total number of gas burners in the firing furnace of FIG. 1 is 80, it takes a long time to ignite all the gas burners, resulting in a large loss of operating time of the firing furnace. Will end up. In the latter case, the ignition device and the electric opening / closing plug installed one by one were expensive, which increased the cost of the furnace.

[0007]

As a result of various studies in view of the above, the present invention is a gas burner ignition that can ignite inexpensively and reliably because it has a simple structure and can ignite a plurality of gas burner groups all in one operation. This is the development of a furnace and a heating furnace using it.

That is, according to the present invention, when igniting a plurality of gas burners arranged side by side in the lateral direction, there is a groove continuously formed in the longitudinal direction, and the grooves are spaced apart in the longitudinal direction. A long flammable gas distribution pipe having a small hole for combustion of the seed flame, which is arranged in the gas burner side by side, is provided with a flammable gas to the flammable gas distribution pipe to supply the flammable gas. Ignite the flammable gas at any position to ignite a pilot fire over the entire flammable gas distribution pipe,
After that, the gas is supplied to a plurality of gas burners to ignite them.

Further, the heating furnace of the present invention is a heating furnace in which a plurality of gas burners are arranged in parallel in the moving direction above and below a moving object to be heated, and the gas burners are arranged near the upper and lower gas burners respectively. The above igniter is arranged in the installation direction, and the upper and lower igniters are communicated with each other by a combustible gas flow pipe having combustion small holes that are separated in the longitudinal direction.

[0010]

EXAMPLES The present invention will be described below with reference to examples.

(Example 1) As shown in FIG. 2, the combustion surface (1)
When igniting a gas burner device in which multiple long gas burners (2) are installed side by side, depending on the shape of the gas burners and the distance between adjacent burners, it is possible to automatically ignite one gas burner (2). However, the adjacent gas burner does not always ignite with the combustion flame.

Therefore, as shown in FIG. 2, a groove (3) is provided on one side surface of the square pipe which can supply the combustible gas from one end along the axial direction thereof, and the bottom of the groove (3) is formed. A pilot pipe (5) with a pilot combustion small hole (4) in the longitudinal direction of the pipe
The small hole (4) was laterally provided on the gas burner side, and the gas burner (2) was installed side by side on one end side of the gas burner (2).

According to such an igniter, the flammable gas is introduced from one end side of the pilot fire pipe (5) through the opening / closing valve (6) to eject the gas from the small holes (4), If the flammable gas ejected from the small hole (4) at any position of (5) is ignited, the gas from the adjacent small hole (4) is ignited one after another and the entire pilot pipe (5) is ignited. A pilot fire can be ignited over. Moreover, the pilot combustion small hole (4) has a concave groove.
With the structure of the present invention which communicates with each other due to (3), if ignition is performed at one location, it will surely be continuously ignited in the lateral direction and will not be easily extinguished. Then, if combustible gas is supplied to each gas burner (2) through the gas pipe (6), the burner is easily ignited because there is a pilot flame in the vicinity of the combustion surface.

Although the square pipe is used as the pilot pipe in the above embodiment, a circular pipe having a ring-shaped cross section as shown in FIG.

(Embodiment 2) A rice cracker firing furnace will be described as a heating furnace using the above igniter.

In the rice cracker baking furnace as shown in FIG. 1, the igniter shown in FIGS. 4 and 5 was installed on one side in the traveling direction of the conveyor for each burner block constituting the preheating section, the expansion section and the coloring section.

That is, each burner block (23a) (23b) (23c)
The lower side gas burner (22) has a lower pilot pipe (10) with a length that covers the entire length of the parallel installation, and the upper side gas burner also.
An upper pilot pipe (11) having a length covering the entire length of the parallel installation of (22) was attached with a stop screw (12) and a steel bar (13) so that these intervals could be expanded and contracted. Further, a vertically connected combustion pipe (14) fixed to the lower pilot pipe (10) and communicating with the inside of the lower pilot pipe (10) was erected over the moving range of the upper pilot pipe (11). The lower pilot pipe (10) and the upper pilot pipe (11) were each provided with a gas supply port (15) for supplying a flammable gas for the pilot fire.

Such an igniter is installed in the preheating section of the firing furnace of FIG.
When installing it on the burner block (23a) of (A), fix the lower pilot pipe (10) sideways near one side of the lower gas burner (22) and place the upper part near the upper gas burner (22). The height of the upper pilot pipe (11) may be adjusted so that the pilot pipe (11) is positioned, and the upper pilot pipe (11) may be fixed with a stop screw (12). Similarly, an igniter having a shape shown in FIGS. 4 and 5 and having a length corresponding to the length of the burner block is installed in the expansion section (B) and the coloring section (C).

To ignite the igniter, a combustible gas is supplied to the igniter of each burner block and the lower pilot pipe (1
If the gas ejected from the small hole (4) at any position in (0) is ignited by the fire at hand, the lower pilot pipe (1
The pilot fire ignites throughout 0). Moreover, in the case of this embodiment, since the lower pilot pipe (10) and the upper and lower connecting combustion pipes (14) are in communication with each other, flammable gas is ejected from the combustion holes (16) of the combustion pipe (14), The flame of the pilot flame of the lower pilot pipe (10) ignites the gas and ignites upward one after another. Then, if combustible gas is supplied to the upper pilot pipe (11), the small holes
The gas ejected from (4) is the combustion hole (1) of the combustion pipe (14).
It is ignited by the flame burning in 6), and the groove is
By the action of (3), the pilot fire is ignited over the entire upper pilot pipe (11).

According to such an igniter, the work of igniting the pilot fire for each burner block in FIG. 1 can be performed only once, so that the time can be greatly shortened. Further, if the gas is supplied to the upper pilot pipe and the lower pilot pipe by the electromagnetic on-off valve, and the lower pilot pipe is ignited by the electromagnetic ignition device, the work efficiency is further improved.
Moreover, the cost of electrical components can be greatly reduced compared to the conventional case.

In the present embodiment, the igniters shown in FIGS. 4 and 5 are installed for each burner block. Such igniters are provided with four burners each of a preheating section (A) and a coloring section (C). Install one unit on each of the blocks (23a) and (23c) over the entire length in the parallel installation direction (expansion part (B) is the burner block (23b)
However, it is also possible to install one igniter over the entire length of the firing furnace.

[0022]

As described above, according to the present invention, an inexpensive igniter for a large number of gas burners can be obtained, and the ignition work of these burners in a heating device (heating furnace) having a large number of gas burners arranged in parallel is extremely effective. It is easy and convenient, and has a remarkable effect that it can be easily installed on an existing heating device.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a rice cracker baking furnace.

FIG. 2 is a perspective view showing an example of an igniter of the present invention.

FIG. 3 is a cross-sectional view showing another example of the pilot fire pipe used in the igniter of the present invention.

FIG. 4 is a perspective view showing another example of the igniter of the present invention.

FIG. 5 is a perspective view showing the back surface of another example of the igniter of the present invention.

[Explanation of symbols]

 1 Combustion surface 2 Gas burner 3 Recessed groove 4 Small flame combustion hole 5 Flame pipe 6 Gas pipe 10 Lower flame pipe 11 Upper flame pipe 12 Stop screw 13 Steel bar communication 14 Vertical connection combustion pipe 15 Gas supply port 16 Combustion Hole 20 Lower endless wire mesh conveyor 21 Upper endless wire mesh conveyor 22 Gas burners 23a, 23b, 23c Burner block

Claims (2)

[Claims] 1. A seed having a groove formed continuously in the longitudinal direction when igniting a plurality of gas burners arranged side by side in the lateral direction, and the groove being separated in the longitudinal direction in the groove. A long flammable gas distribution pipe having small holes for fire combustion is laid side by side in the juxtaposed direction of the gas burner, and a flammable gas is supplied to the flammable gas distribution pipe to provide an arbitrary position on the pipe. By igniting the seed flame over the entire flammable gas distribution pipe by igniting the flammable gas at, then supply gas to a plurality of gas burners to ignite them Igniter. 2. A heating furnace in which a plurality of gas burners are arranged in parallel in the moving direction above and below a moving object to be heated, wherein the gas burners are arranged in parallel in the vicinity of the upper and lower gas burners. A heating furnace in which the igniter described above is arranged, and the upper and lower igniters are communicated with each other by a combustible gas flow pipe having combustion small holes that are separated in the longitudinal direction.