JP3019234B2 - Multi-gas burner igniter and heating furnace using it - Google Patents

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 all burners in a single ignition operation of a plurality of gas burners arranged side by side, and a heating furnace using such an igniter.

[0002]

2. Description of the Related Art As a device provided with a large number of gas burners, there is, for example, a baking oven for rice crackers. As shown in FIG. 1, a stainless steel lower endless wire mesh conveyor (20) that moves with a rice cracker placed and moved in a long continuous firing furnace,
These rice crackers are sandwiched between the lower endless wire mesh conveyors (20) and baked, and the upper endless wire mesh conveyor (21) also made of stainless steel is continuous above and below the passage surface of the rice crackers in the furnace. A large number of gas burners (22) are installed, and the upper and lower wire mesh conveyors (2
0) The dough sandwiched in (21) is heated by upper and lower burners (22) to bake the dough to obtain a cracker.

[0003] Such a firing furnace is usually divided into a part called a preheating part (A), an expansion part (B) and a coloring part (C) in order from the entrance side for feeding the dough. First, the dried rice cracker dough is further dried and preheated in a preheating section, expanded in a subsequent expansion section to a desired size, and further subjected to a preferred baking color in a coloring section and baked.

[0004]

In the above-mentioned firing furnace, a large number of gas burners are used as heat sources. For example, in the firing furnace shown in FIG. 1, the preheating section (A) is composed of four burner blocks (23a), but each block (23a) has four upper and lower gas burners (22) and the expansion section (B ) Is provided with a burner block (23b) having 10 gas burners (22) each at the top and bottom, and the coloring portion (C) is composed of four burner blocks (23c), each block (23c) having four tops, It has the lower three gas burners (22). Therefore, a total of 80 gas burners are used for the entire sintering furnace.

As a method of igniting these gas burners, for example, each gas burner is provided with a manual or electric open / close plug of a combustible gas, and each open / close plug is opened one by one with a hand-operated ignition source. The gas burner was ignited. Alternatively, one electromagnetic ignition device that generates a spark near the combustion surface of each burner is provided, and each gas burner is automatically activated by opening the electric open / close plug for each gas burner by remote control and activating the ignition device. There is also a way to ignite.

However, in the former method, there are a total of 80 gas burners in the firing furnace shown in FIG. 1, and it takes a long time to ignite all the gas burners, resulting in a large loss in operating time of the firing furnace. Would. In the case of the latter, the ignition device and the electric shut-off cock which are installed one by one are expensive and increase the cost of the furnace.

[0007]

According to the present invention, as a result of various investigations, a gas burner ignition system capable of igniting inexpensively and reliably because of its simple structure and further capable of igniting a plurality of gas burner groups in one operation. Vessel 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 longitudinal direction, the gas burners have grooves formed continuously in the longitudinal direction, and are spaced apart in the longitudinal direction in the grooves. A long flammable gas flow pipe having small holes for pilot flame combustion is provided horizontally in the direction in which the gas burners are juxtaposed, and a flammable gas is supplied to the flammable gas flow pipe to supply the flammable gas to the pipe. By igniting the combustible gas at any position, a pilot flame is ignited throughout the combustible gas flow pipe,
Thereafter, gas is supplied to a plurality of gas burners to ignite them.

In the heating furnace of the present invention, a plurality of gas burners are juxtaposed in a moving direction above and below a moving object to be heated. The above-mentioned igniters are arranged in the installation direction, and these upper and lower igniters are communicated with each other by a combustible gas flow pipe having combustion small holes separated in the longitudinal direction.

[0010]

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

(Embodiment 1) As shown in FIG. 2, a combustion surface (1)
When igniting a gas burner device in which a plurality of long gas burners (2) are arranged side by side, depending on the shape of the gas burners and the distance between adjacent burners, etc., igniting only one gas burner (2) automatically The combustion gas does not always ignite the adjacent gas burner.

Therefore, as shown in FIG. 2, a concave groove (3) is provided on one side surface of the square pipe capable of supplying flammable gas from one end thereof along the axial direction thereof, and the bottom of the concave groove (3) is formed. Pilot pipe (5) with pilot holes (4) spaced apart in the longitudinal direction of the pipe
The small holes (4) were arranged laterally on the gas burner side to one side of the gas burners (2) arranged side by side to form an igniter.

According to such an igniter, the flammable gas flows from one end of the pilot pipe (5) through the on-off valve (6), and the gas is ejected from these small holes (4). If the flammable gas ejected from the small hole (4) at an arbitrary position in (5) is ignited, the gas from the adjacent small hole (4) is ignited one after another and the entire pilot pipe (5) is ignited. To ignite a pilot flame. In addition, the pilot hole combustion hole (4) has a concave groove
According to the structure of the present invention that communicates with each other according to (3), if one location is ignited, the ignition is reliably continued continuously in the lateral direction and does not disappear easily. Thereafter, if a 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 near the combustion surface.

Although a square pipe is used as the pilot pipe in the above embodiment, a round pipe having a ring-shaped cross section as shown in FIG. 3 or any other pipe can be used in the same manner.

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

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

That is, each burner block (23a) (23b) (23c)
A lower pilot pipe (10) that covers the entire length of the juxtaposed lower gas burner (22), and an upper gas burner
An upper pilot pipe (11) having a length covering the entire length of the juxtaposed length of (22) was attached with a stop screw (12) and a steel bar (13) so that the interval between them could be expanded and reduced. 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) is erected over the moving range of the upper pilot pipe (11). The lower pilot pipe (10) and the upper pilot pipe (11) are provided with gas supply ports (15) for supplying flammable gas for pilot fire, respectively.

Such an igniter is connected to the preheating section of the firing furnace shown in FIG.
When installing on the burner block (23a) of (A), fix the lower pilot pipe (10) horizontally near one side of the lower gas burner (22) and fix the upper pilot pipe near the upper gas burner (22). What is necessary is just to adjust the height of the upper pilot pipe (11) so that the pilot pipe (11) is located, and fix it with the stopper screw (12). Similarly, an igniter having the shape shown in FIGS. 4 and 5 and having a length corresponding to the length of the burner block is installed in the expanding portion (B) and the coloring portion (C).

In order to ignite the igniter, a combustible gas is supplied to the igniter of each burner block, and the lower pilot pipe (1) is ignited.
If the gas erupting from the small hole (4) at any position in (0) is ignited by the fire at hand, the lower pilot pipe (1
A pilot flame ignites over the entirety of (0). Moreover, in the case of this embodiment, since the lower pilot pipe (10) and the vertically connected combustion pipe (14) are in communication with each other, flammable gas is blown out from the combustion hole (16) of the combustion pipe (14), and The pilot flame of the lower pilot pipe (10) ignites the gas and ignites upward one after another. After that, if flammable gas is supplied to the upper pilot pipe (11), the small holes
The gas ejected from (4) is supplied to the combustion hole (1) of the combustion pipe (14).
Ignition by flame burning in 6), groove as described above
By the effect of (3), a pilot flame is ignited over the entire upper pilot pipe (11).

According to such an igniter, the operation of igniting a pilot flame for each burner block in FIG. 1 can be performed only once, so that the time is greatly reduced. In addition, if the supply of gas to the upper pilot pipe and the lower pilot pipe is performed by an electromagnetic switching valve, and the lower pilot pipe is ignited by an electromagnetic ignition device, the work efficiency is further improved.
In addition, the cost of electrical components can be greatly reduced as compared with the related art.

In this embodiment, the igniters shown in FIGS. 4 and 5 are provided for each burner block. Such an igniter is provided with four burners each for a preheating section (A) and a coloring section (C). One unit is installed on each of the blocks (23a) and (23c) along the entire length in the side-by-side direction (the expansion part (B) is a burner block (23b)
And one igniter), and one igniter can be installed 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 operation of igniting these burners in a heating device (heating furnace) in which a large number of gas burners are juxtaposed is extremely performed. It is easy and simple, and has remarkable effects such as being able to be easily installed on an existing heating device.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view showing another example of a pilot 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 a back surface of another example of the igniter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burning surface 2 Gas burner 3 Groove 4 Pilot combustion small hole 5 Pilot pipe 6 Gas pipe 10 Lower pilot pipe 11 Upper pilot pipe 12 Stop screw 13 Bar steel communication 14 Vertically connected 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

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23Q 9/08 F24C 3/00 F23Q 9/00

Claims (2)

(57) [Claims] When igniting a plurality of gas burners arranged side by side in a transverse direction, seeds having grooves formed continuously in the longitudinal direction and being spaced apart in the longitudinal direction in the grooves. A long flammable gas flow pipe having small holes for fire combustion is provided horizontally in the direction in which the gas burners are juxtaposed, and a flammable gas is supplied to the flammable gas flow pipe so as to arbitrarily position the pipe. A multi-gas burner characterized by igniting the flammable gas with a pilot flame over the entire flammable gas distribution pipe and thereafter supplying gas to a plurality of gas burners and igniting them. Igniter. 2. A heating furnace in which a plurality of gas burners are juxtaposed in the moving direction above and below a moving object to be heated, wherein the gas burners are juxtaposed in the juxtaposition direction near the upper and lower gas burners. A heating furnace, wherein the igniters described above are arranged, and the upper and lower igniters are communicated with each other by a combustible gas flow pipe having combustion small holes separated in a longitudinal direction.