JPH0341728B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an infrared radiation combustion plate, and a burner for a sinter and a burner for a heater using the combustion plate. (Prior Art) Conventionally, an infrared radiation combustion plate is constructed by disposing a large number of flame holes passing through a plate material mainly made of ceramic, and the flame holes are uniformly provided over the entire surface of the plate.
In addition, a combustion plate in which a plurality of protrusions are formed on the surface of a plate material and one flame port is provided on each of the plurality of protrusions is disclosed in Japanese Patent Publication No. 18670-1970 and Japanese Patent Publication No. 39-1989.
It is described in Publication No. 6665. (Problem to be solved by the invention) However, this is provided, for example, in a top burner of a rear exhaust type sinter that requires a relatively small amount of heat and also requires a large combustion surface of the combustion plate. If the combustion plate is provided with the usual number of burners and the burners are spaced at normal pitches, the amount of heat generated will be too large, making it impossible to achieve good grilling. Therefore, it is possible to reduce the amount of gas supplied, but in this case, the load on each burner port will decrease, and the temperature of the combustion plate will not rise sufficiently, making combustion unstable. There is a problem. Furthermore, in the case of a heater in which an infrared burner is installed in a large heater body equipped with an opening for releasing infrared radiant heat, with the combustion surface facing the opening, the opening is made large, and one side is removed from the entire surface of the opening. If you are trying to get a luxurious heating feeling by emitting infrared rays, as mentioned above, if you set up the usual number of flame holes at the usual pitch intervals, the amount of heat will be too large and you will not be able to achieve gentle heating. This will cause problems. It should be noted that if the interval between the burner ports is simply expanded, the temperature around the burner ports will not rise sufficiently and combustion will become unstable, as is the case when the amount of gas to be supplied is reduced, as described in each of the above-mentioned publications. The problem with the combustion plate cannot be solved either. An object of the present invention is to obtain a combustion plate free from such problems, as well as a burner for a sinter and a burner for heating using the combustion plate. (Means for Solving the Problem) In order to achieve this object, the infrared radiation plate according to claim 1 is a plate material mainly made of ceramic, in which multiple rows of flame ports are arranged to penetrate through the plate material. The burner ports, each consisting of a plurality of burner port rows arranged parallel to each other at predetermined intervals, are arranged in parallel at intervals greater than the predetermined spacing, and at least one burner port is located between the burner ports and the other. It is formed by providing parallel grooves. An infrared radiation plate according to a second aspect of the present invention is provided with a flameless port area on the plate material. The burner for a sinter according to claim 3 is an infrared radiation burner having a combustion surface on the lower surface that covers almost the entire ceiling surface of the sintering chamber of the sinter main body. It is formed by a combustion plate. A burner for a heater according to claim 4 is an infrared burner provided in a heater main body having an infrared ray radiation opening with a combustion surface facing the opening, the combustion surface of the burner as defined in claim 1 or 2. It is formed by the combustion plate described above. (Function) In the combustion burner according to claim 1, since the burner port consisting of the plurality of burner port rows is provided through the groove and at a pitch larger than the pitch in which the burner port rows are arranged in parallel, the combustion around the burner port is The heat capacity of the flame plate is small, so even if the flame openings are far apart, the area near the flame openings can be maintained at a high temperature without being affected by this, and a stable flame can thereby be maintained. The amount of combustion gas per unit area of the combustion surface can be reduced, and a wide combustion surface can be easily formed. According to the infrared combustion plate according to claim 2, the amount of combustion gas can be further reduced compared to the amount of combustion gas per unit area of the infrared combustion plate according to claim 1 due to the presence of the flameless port region. This allows you to create a more expansive combustion surface. Furthermore, in the burner for a sinter according to the third aspect, since the amount of combustion gas per unit area is small and the burner has a wide combustion surface, the food to be cooked can be baked and cooked as uniformly as possible. Furthermore, in the heating burner according to claim 4,
Since the combustion surface has a small amount of combustion gas per unit area and a wide combustion surface, heating can be performed while emitting soft infrared rays from the wide infrared radiation window of the heater main body facing the heating surface. (Example) An example of the present invention will be described with reference to the attached drawings. In the drawing, 1 shows an infrared radiation combustion plate made of a plate 2 mainly made of ceramic and provided with multiple rows of flame ports 3 passing through it. Instead of providing a row of flame holes 3, a groove-shaped recess 5 with a flameless hole is provided in place of the row of flame holes 3. Therefore, a convex portion 4 having a flame port in which two rows of flame ports 3 are provided is formed between the recesses 5, and the pitches of the rows of flame ports facing each other with the concave portion 5 in between are the same. This is twice the pitch of the flame port row within the mouth. That is, in the first embodiment shown in FIGS. 1 to 4, grooves having a U-shaped cross section as recesses 5 and protrusions having a chevron-shaped cross section as convex portions 4 are alternately provided on the surface of a rectangular plate 2. , 2 along the length of the protrusion
Fire mouth 3 was applied to the row. When such an infrared radiation combustion plate 1 is attached to a gas burner main body 6 as shown in FIG. It is relatively small, and as a result, even if there is a part without a flame port in the vicinity of the flame port 3, the part provided with the flame port 3 is heated to a temperature sufficient to maintain combustion, resulting in stable combustion. Can be maintained. In the second embodiment shown in FIGS. 5 and 6,
A large number of concave grooves 5a, 5b having a U-shaped cross section of about 30 degrees and 210 degrees with respect to the sides are provided on the combustion surface of the rectangular plate material 2, and a large number of diamond-shaped protrusions 4 are formed between them. Four burner ports 3 were provided on each of the convex portions 4, and the burner ports 3 were also provided in one of the grooves 5b, so that only the groove 5a had a portion without the burner ports 3. When such an infrared radiation combustion plate 1 is attached to a gas burner body and burned, each convex portion 4 provided with the flame port 3 can independently further reduce its heat capacity, and moreover, the flame port 3 from one of the grooves 5b can be further reduced.
The convex portion 4 can be further heated by the flame, thereby raising the temperature of the convex portion 4 sufficiently to a temperature necessary and sufficient to maintain stable combustion. Furthermore, in the third embodiment shown in FIG. 7, in order to further reduce the supply gas amount in the second embodiment, a part of the combustion surface is provided with a flameless port area 8 without any flame ports. Formed. In this case, the flameless port area 8 is designed to ensure that the infrared rays emitted from the combustion plate 1 are radiated almost uniformly, and that stress concentration due to thermal strain etc. does not occur in the vulnerable portion by providing the flame port 3. It is desirable to provide a Taking these into consideration, in this embodiment, rectangular flame-free opening regions 8 are provided in three locations on the rectangular plate material 2. Incidentally, if the recess grooves 5a, 5b are also provided in the flameless spout region 8, and a non-penetrating hole 7 with a small diameter similar to the flame spout 3 is further provided, the flame spout 3 can be formed in the flameless spout region 8. Since the condition of the plate material 2 can be approximated to the condition of the part, it is possible to more reliably prevent the occurrence of cracks in the plate material 2 due to thermal distortion. FIG. 8 shows an embodiment in which a gas burner body 6 equipped with the infrared radiation combustion plate 1 is attached to the ceiling of a rear exhaust type combustor 9 and used as a top burner. A combustor can be obtained which can uniformly heat the food to be cooked over the entire surface from a relatively wide combustion surface and with a relatively small amount of heat. In the figure, numeral 10 indicates an exhaust port. Incidentally, a combustion experiment was conducted using a gas burner equipped with the combustion plate 1 shown in the third embodiment in the sinter 9, and the results of the co/CO ₂ values were as follows.

【table】

[Table] As is clear from this result, the co/CO ₂ value of 0.01 specified by the JIS standard is fully satisfied and good combustion can be achieved. Although no combustion experiments were conducted on the combustion plates 1 shown in the first and second embodiments,
In these cases, since there is no flameless nozzle area 8 where the temperature does not easily rise, the amount of combustion per unit time increases, but it can be naturally expected that the value of co/CO ₂ will be better than in the third embodiment. FIG. 9 shows an embodiment in which a burner body 6 equipped with the combustion plate 1 is attached to a heater body 12 equipped with a radiant heat release opening 11 with the combustion surface facing the opening 11, In this case, since the radiation surface of the combustion plate 1 is large compared to the amount of combustion, a heater with a luxurious and gentle heating effect can be obtained. (Effects of the Invention) Since the present invention is configured as described above, it produces the following effects. In the infrared radiation combustion plate according to claim 1, recesses without a flame port and convex portions with a flame port are alternately provided on the surface of a plate material mainly made of ceramic. The heat capacity is relatively small, so even if there is a part without a flame port near the flame mouth, the temperature near the flame mouth can be maintained at the temperature necessary for stable combustion, thereby maintaining a relatively large spread. It is true that a burner with a small amount of combustion per unit time can be obtained, and in the infrared radiant combustion plate according to claim 2, the amount of combustion per unit time can be further reduced due to the presence of the flameless port area. According to the burner for a sintering device described above, the food to be cooked can be cooked over a wide area and with a relatively small amount of heat, and the food to be cooked can be heated as uniformly as possible. The heating burner provides a heater that can provide gentle heating with a wide spread.

[Brief explanation of the drawing]

Fig. 1 is a front view of a combustion plate showing an example of the implementation of the present invention, Fig. 2 is an enlarged view of a part thereof, Fig. 3 is a cross-sectional view taken along the - line, and Fig. 4 is a diagram showing a combustion plate equipped with the combustion plate. A slope view of the burner, Fig. 5 is an enlarged view showing a part of a modification of the combustion plate, and Fig. 6 is the -
7 is a front view of another combustion plate, FIG. 8 is a cross-sectional front view when applied to a sinter, and FIG. 9 is a cross-sectional side view when applied to a heater. 1... Infrared radiation combustion plate, 2... Plate material,
3... Burner port, 4... Convex portion, 5... Recessed portion, 6... Gas burner body, 8... Flameless port area.

Claims (1)

[Scope of Claims] 1. In a plate material mainly made of ceramic, in which multiple rows of burner ports are arranged to pass through the plate material, a plurality of rows of burner ports are arranged parallel to each other at predetermined intervals. An infrared radiation combustion plate comprising flame ports arranged in parallel at intervals greater than the predetermined interval, and at least a groove parallel to the flame ports provided between the flame ports. 2. The infrared radiation combustion plate according to claim 1, wherein the plate material is provided with a flameless port area. 3. An infrared radiation burner having a combustion surface on the lower surface that covers almost the entire ceiling surface of the firing chamber of the firing device body, wherein the combustion surface of the burner is formed of the combustion plate according to claim 1 or 2. Burna. 4 Inside the heater body equipped with an opening for infrared radiation,
3. A heater burner comprising an infrared burner with a combustion surface facing the opening, the combustion surface of the burner being formed of the combustion plate according to claim 1 or 2.