JPH087221Y2 - Ring gas burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a ring-shaped gas burner used in a boiler, a heating furnace or the like.

[Conventional technology]

A conventional ring-shaped gas burner installed in the boiler will be described with reference to FIGS. 3 and 4.

The part equipped with a gas burner is roughly divided into the furnace wall 1 of the part where the burner is installed, the burner throat 2 opened in the furnace wall 1,
It is composed of a ring-shaped gas burner body 3 for injecting fuel gas and an air register 4 for supplying combustion air.

A gas burner body 3 formed by forming a steel pipe into a ring shape is divided into two on the circumference, and a furnace wall casing 5 on the outer surface of the furnace wall 1 is formed.
The gas burner mounting hardware 6 is used for mounting. Inside the furnace of the gas burner main body 3, an injection hole 7 for gas serving as a fuel is opened toward the inside of the furnace. In order to sufficiently mix the fuel gas and the combustion air, the gas injection holes 7 are divided into four or more groups (hereinafter referred to as grouping), as shown in FIG. Gas injection hole 7
4 or more injection hole groups 8 are formed. An air register 4 is installed outside the furnace of the gas burner main body to supply the combustion air after adjusting and rectifying the flow rate. The fuel gas is supplied to the gas burner main body 3 from the outside of the apparatus through a fuel gas pipe 9 as shown by the arrow in the figure, and is injected from the gas injection holes 7 toward the inside of the furnace.

On the other hand, the combustion air passes through the air register 4 and the central portion of the gas burner body 3 and is supplied from the burner throat 2 into the furnace as shown by the arrow in FIG.

The fuel gas is mixed with combustion air when it is injected into the furnace from the gas injection hole 7 of the gas burner body 3, and is ignited by the ignition device and burned.

[Problems to be solved by the device]

In the conventional ring-shaped gas burner installed in the above-described boiler, as shown in FIG. 4, the fuel gas stays at the end 13 of the gas burner body 3 divided into two, and the gas burner is supplied by the supplied fuel gas. The cooling effect of the main body is small, and the surface inside the furnace (radiation heat receiving surface) of the gas burner body receives the radiant heat from the combustion fire of the fuel gas injected into the furnace, and the distortion, oxidation and burning due to the surface temperature rise. Occurred and there was a problem in the operation of the entire device due to its structure.

Further, even when the gas burner body needs to be replaced, there is a drawback that the range of replacement is wide because the portion of the gas burner body divided on the circumference is large.

The present invention seeks to overcome the aforementioned drawbacks of conventional ring gas burners.

[Means for solving the problem]

The present invention is a ring-shaped gas burner used in a boiler, a heating furnace, etc. and having a plurality of gas injection hole groups, and each of the gas burner main bodies is circumferentially divided with one fuel gas injection hole group. It is composed of a plurality of portions arranged at intervals in the circumferential direction, and a spacer having the same cross-sectional shape as the same portion is installed between the divided portions of the gas burner main body and the portion of the gas burner main body. A ring was formed by the spacer, and the surface of the gas burner other than the periphery of the gas injection hole in the gas burner body was covered with a refractory material.

[Action]

 The present invention can exert the following effects.

(1) By dividing the ring-shaped gas burner main body on the circumference so that each has one gas injection hole group, that is, by dividing into parts for each gas injection hole group, (a) divided ends of the gas burner main body The portion where the fuel gas stays in the section, in other words, the portion where the cooling effect of the gas burner due to the flow of the fuel gas is small becomes small, and distortion, oxidation and burnout due to the temperature rise of the furnace inner surface of the gas burner main body are prevented.

(B) Since the fuel gas flow path in each part of the gas burner body becomes short, the temperature rise of the fuel gas due to radiant heat in the middle of the path is mitigated, and the effect of cooling the gas burner by the fuel gas is provided, and only the above-mentioned retention part is provided. In addition, distortion, oxidation and burnout due to the temperature rise of the furnace inner surface of the gas burner body can be prevented.

(2) Since the ring-shaped gas burner body is divided for each gas injection hole group, it is possible to remove each divided portion from the device, and even if it is necessary to replace the gas burner body, it can be replaced within a smaller range than before. The cost can be reduced.

(3) The divided gas burner body and spacers are formed into a ring shape, and the same cross-sectional shape is provided anywhere on the circumference of the ring, so that the flow of combustion air when passing through the burner throat is not disturbed. To the furnace.

(4) The refractory material that covers the surface of the gas burner main body portion except the periphery of the gas injection hole has a heat insulating function of shielding the radiant heat due to the combustion fire in the furnace and mitigating the temperature rise of the gas burner main body surface due to the radiant heat. Therefore, the refractory material coating the surface of the gas burner body portion moderates the temperature rise on the surface of the gas burner body, and prevents the distortion, oxidation, and burnout due to the high temperature of the gas burner body in addition to the action of item (1).

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

In this embodiment, as shown in FIG. 2, the gas injection holes 7 of the gas burner opening toward the inside of the furnace are grouped and divided into four gas injection hole groups 8 each having a plurality of gas injection holes. The gas burner is divided into four gas burner main body portions 3a which are divided so as to include the gas injection hole groups 8 and are arranged at intervals on the circumference, and the refractory spacers 10 arranged between the portions 3a. The body 3 is formed in a ring shape. The portion 3a of the gas burner body is arranged so that the gas injection hole 7 faces the inside of the furnace. The surface of the portion 3a of the gas burner body except the gas injection hole 7 is covered with a refractory material 14. Split gas burner body part 3a
Each has a fuel gas pipe 9 having a fuel gas inlet 9a.
Thus, the fuel gas is supplied from the outside of the device. The portion 3a of the gas burner main body is attached to the furnace wall casing 5 by the gas burner attachment hardware 6, and the structure can be removed from the apparatus by cutting the gas burner attachment hardware 6 and the fuel gas pipe 9 in the middle. There is. The spacer 10 arranged between the parts 3a of the gas burner main body is made of a refractory material so that the shape of the part in contact with the combustion air flowing from the air register 4 outside the furnace is the same as the cross-sectional shape of the part 3a of the gas burner main body. ing. The spacer 10 made of the refractory material is attached to the furnace wall casing 5 by an anchor 12 and the gas burner fitting 6 is attached.
Fixed to. In addition, 2 in the figure is a burner throat which opens to the furnace wall 1.

In the present embodiment configured as described above, by dividing the gas burner main body into four parts 3a, the part where the fuel gas stays at the end of the part 3a becomes smaller, and the flow path of the fuel gas is reduced. By shortening, and by covering the surface of the same portion 3a with a refractory material to shield the radiant heat, the cooling effect of each portion 3a of the gas burner main body 3 by the fuel gas is increased, and the gas burner main body 3 by the radiant heat of the combustion fire is increased. The temperature rise on the inner surface of the furnace of the
Oxidation and burnout are prevented.

Further, since the gas burner main body portion 3a and the spacer 10 can be individually removed from the furnace wall casing 5, even if the gas burner main body needs to be replaced, it can be replaced within the minimum range.

Furthermore, since both the gas burner body portion 3a and the spacer 10 have the same shape in the portion in contact with the combustion air, the flow of the combustion air when passing through the burner throat 2 is supplied into the furnace without being disturbed. be able to.

As described above, in the present embodiment, the temperature rise of the furnace inner surface of the gas burner main body 3 is mitigated, strain, oxidation and burnout due to high temperature can be prevented, and long-term reliability is improved both in terms of structure and operation of the entire apparatus. Can be planned.

[Effect of device]

 The present invention can bring the following effects.

(1) By dividing the gas burner body into a plurality of portions for each gas injection hole group, the fuel gas retention portion in the gas burner body becomes smaller, and the flow path of the fuel gas becomes shorter, so that the gas burner The cooling effect can be increased, and thereby the temperature rise on the surface of the gas burner main body due to the radiant heat of the combustion fire in the furnace can be reduced. Therefore, it is possible to prevent distortion, oxidation and burning due to the temperature rise of the surface of the gas burner body.

(2) The part of the gas burner body and the spacer can be independently removed from the apparatus, and even when the gas burner body needs to be replaced, the gas burner body can be replaced in a smaller range than in the past, and the cost can be reduced.

(3) The gas burner is formed in a ring shape by the portion of the gas burner main body and the spacer, and the same cross-sectional shape is formed over the circumference of the ring, so that the flow of the combustion air when passing through the burner throat is not disturbed, This can be fed into the furnace.

[Brief description of drawings]

1 (a) is a sectional view taken along the line AA of FIG. 2 of an embodiment of the present invention, and FIG. 1 (b) is a sectional view taken along the line BB of FIG. 2 of the same embodiment. Fig. 3 is an elevational view of the same embodiment as seen from the inside of the furnace, Fig. 3 is a sectional view of a conventional ring gas burner, and Fig. 4 is an elevational view of the conventional gas burner as seen from the inside of the furnace. 1 …… furnace wall, 2 …… burner throat, 3 …… gas burner body, 3a …… gas burner body part, 4 …… air register,
5 …… Furnace wall casing, 6 …… Burner mounting hardware, 7 …… Gas injection holes, 8 …… Gas injection holes, 9 …… Fuel gas piping, 10 ……
Spacer, 14 …… Fireproof material.

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped gas burner having a plurality of gas injection hole groups, wherein each gas burner body is provided with one fuel gas injection hole group and is divided in the circumferential direction and spaced apart in the circumferential direction. A plurality of arranged parts, between the divided parts of the gas burner body, a spacer having the same cross-sectional shape as the same part is installed to form a ring by the part of the gas burner body and the spacer, and A ring-shaped gas burner characterized in that the surface of the gas burner except for the periphery of the fuel gas injection hole of the gas burner body is covered with a refractory material.