TWI742313B - burner - Google Patents

Abstract

The combustor is characterized by a fuel nozzle that injects fuel, and a pair of combustion-supporting gas nozzles that inject combustion-supporting gas on the outer periphery of the fuel nozzle. The fuel opening to the furnace is at an opposite position. The tip of the combustion-supporting gas nozzle has an inclined flow path that is inclined with respect to the axis of the main body of the combustion-supporting gas nozzle, and the inclined flow path is close to the fuel opening toward the combustion-supporting opening. The way is tilted.

Description

burner

Field of invention

The present invention relates to a burner installed in a furnace.

Background of the invention

Conventionally, in a furnace for heat-treating processing materials such as steel sheets or round bars, as shown in Patent Document 1, continuous combustion in which the flame is formed into a specific shape such as a flat shape according to the shape of the furnace or the processing requirements of the processed material is used. Device B matter.

Prior art literature

Patent literature

Patent Document 1 Japanese Patent Application Laid-Open No. 10-183235

Summary of the invention

However, depending on the shape of the furnace or the processing requirements of the processed materials, flames of different shapes are required.

Therefore, the purpose of the present invention is to provide a burner that can obtain flames of various shapes.

The first aspect of the present invention is a burner characterized by: Fuel nozzles for injecting fuel; a pair of combustion-supporting gas nozzles that inject combustion-supporting gas are arranged on the outer peripheral side of the fuel nozzles, and the combustion-supporting openings of the combustion-supporting gas nozzles into the furnace are provided in the furnace relative to the fuel nozzles The openings are opposite positions. The front end of the combustion gas nozzle has an inclined flow path that is inclined with respect to the axial direction of the main body of the combustion gas nozzle. The inclined flow path is close to the fuel toward the combustion opening. The opening is inclined.

According to the aforementioned configuration, the inclined flow path is inclined so as to approach the fuel opening toward the combustion-supporting opening. Therefore, the flame can be formed into a flat shape by pressing the flame with the combustion-supporting gas from the combustion gas nozzle.

A second aspect of the present invention is a combustor characterized by having: a fuel nozzle that injects fuel; a pair of combustion-supporting gas nozzles that inject combustion-supporting gas are provided on the outer peripheral side of the fuel nozzle; The internal combustion-supporting opening is provided at a position opposite to the fuel opening of the fuel nozzle toward the furnace, and the front end of the combustion gas nozzle is inclined with respect to the axial direction of the main body of the combustion-supporting gas nozzle The inclined flow path is inclined so as to open from the fuel opening toward the combustion-supporting opening.

According to the aforementioned structure, because the flow path is inclined to face the aforementioned auxiliary The combustion opening is inclined from the fuel opening. Therefore, the flame can be formed into a flat shape by expanding the flame by the combustion-supporting gas from the combustion gas nozzle.

A third aspect of the present invention is a combustor characterized by: a fuel nozzle that injects fuel; two pairs of combustion-supporting gas nozzles that inject combustion-supporting gas are provided on the outer peripheral side of the fuel nozzle, and two pairs of the aforementioned combustion-supporting gas nozzles The combustion-supporting openings into the furnace are provided at positions opposite to the fuel openings into the furnace of the fuel nozzle, and the front end of the combustion gas nozzle has an axis centered relative to the main body of the combustion-supporting gas nozzle The direction is an inclined inclined flow path. The inclined flow path of the pair of combustion-supporting gas nozzles on one side is inclined so that the combustion-supporting opening is close to the aforementioned fuel opening, and the inclined flow path of the pair of combustion-supporting gas nozzles on the other side is facing The combustion-supporting opening is inclined from the fuel opening, and the first straight line passing through the center of the pair of combustion-supporting gas nozzles on one side intersects the second straight line passing through the center of the pair of combustion-supporting gas nozzles on the other side. .

According to the foregoing configuration, the inclined flow path of the pair of combustion-supporting gas nozzles on one side is inclined so as to approach the combustion opening of the fuel opening, and the inclined flow path of the pair of combustion-supporting gas nozzles on the other side is directed from the combustion opening to the combustion opening. The fuel opening is inclined in such a way that it passes through the first straight line of the center of a pair of combustion-supporting gas nozzles on one side and a pair of combustion-supporting gas on the other side. The second straight line in the center of the body nozzle crosses. As a result, by squeezing the flame by the combustion-supporting gas from the combustion-supporting gas nozzle on one side, and expanding the flame by the combustion-supporting gas from the combustion-supporting gas nozzle on the other side, the shape of the flame can be flattened in the first linear direction.

A fourth aspect of the present invention is a combustor characterized by having: a fuel nozzle for injecting fuel; a plurality of combustion-supporting gas nozzles for injecting a combustion-supporting gas are provided in the circumferential direction on the outer peripheral side of the fuel nozzle; The tip of the nozzle has an inclined flow path that is inclined with respect to the axial direction of the main body of the combustion-supporting gas nozzle, and the inclined flow paths of the combustion-supporting gas nozzle are respectively inclined in the same circumferential direction toward the combustion-supporting opening.

According to the aforementioned configuration, the inclined flow paths of the combustion-supporting gas nozzle are respectively inclined in the same circumferential direction toward the combustion-supporting opening. Therefore, the swirling flow of the combustion-supporting gas from the combustion-supporting gas nozzle can stir the gas in the furnace and make the furnace gas The temperature distribution is uniform.

A fifth aspect of the present invention is a combustor characterized by having: a fuel nozzle for injecting fuel; a plurality of combustion-supporting gas nozzles for injecting a combustion-supporting gas are provided in the circumferential direction on the outer peripheral side of the fuel nozzle, and the aforementioned supporting gas The tip of the nozzle has an inclined flow path inclined with respect to the axial direction of the main body of the combustion-supporting gas nozzle, and the inclined flow paths of the combustion-supporting gas nozzle are respectively inclined in the same direction toward the combustion-supporting opening.

According to the aforementioned configuration, the inclined flow paths of the combustion-supporting gas nozzle are inclined in the same direction toward the combustion-supporting opening. Therefore, the combustion-supporting gas from the combustion-supporting gas nozzle can make the flame have directivity, and the object can be directed toward the flame, or It is to avoid direct contact with the flame.

It is preferable that the first aspect to the fifth aspect further have the following configuration.

(1) The inclined flow path is provided so as to be rotatable relative to the furnace body in which the burner is installed.

(2) In the opening of the front end portion into the furnace, a guide groove for guiding the injection direction of the combustion-supporting gas injected from the opening is formed.

According to the aforementioned configuration (1), by making the inclined flow path rotatable with respect to the furnace body, the injection direction of the combustion-supporting gas can be changed. As a result, the shape of the flame can be changed flexibly according to the shape of the furnace or the shape and characteristics of the processed material.

According to the aforementioned configuration (2), the injection direction of the combustion-supporting gas can be stabilized by the guide groove.

In short, when according to the present invention, it is possible to provide a burner capable of obtaining flames of various shapes.

1: Furnace

2: Fuel nozzle

2a: Fuel opening

25: Fuel pipe

25a: Supply valve

25b: adjusting valve

3: Combustion gas nozzle

3a: Combustion opening

31: body part

31a: Gas flow path

31b: Threaded part

32: Front end

32a: Inclined flow path

32b: The inner end of the furnace

32c: guide groove

32d: slit groove

35: gas pipe

37: flange

38: fixed components

35a: Supply valve

35b: adjusting valve

301: Combustion gas nozzle

301a: Combustion opening

302: Combustion gas nozzle

302a: Combustion opening

303: Combustion gas nozzle

303a: Combustion opening

4: Combustion gas nozzle

4a: Combustion opening

41: Combustion gas nozzle

41a: Combustion opening

42: Combustion gas nozzle

42a: Combustion opening

43: Combustion gas nozzle

43a: Combustion opening

45a: Supply valve

45b: adjusting valve

5: Combustion gas nozzle

5a: Combustion opening

51: Combustion gas nozzle

51a: Combustion opening

52: Combustion gas nozzle

52a: Combustion opening

53: Combustion gas nozzle

53a: Combustion opening

6: Combustion gas nozzle

6a: Combustion opening

61: Combustion gas nozzle

61a: Combustion opening

62: Combustion gas nozzle

62a: Combustion opening

63: Combustion gas nozzle

63a: Combustion opening

91: Furnace Wall

92: Concave surface of furnace wall

92a: corner

10: Burner

11: protrusion

11a: Threaded part

F: Flame

S: In the furnace

T: Outside the furnace

L1: first straight line

L2: 2nd straight line

L3: 1st line

L4: 2nd straight line

L5: 1st line

L6: 2nd straight line

Fig. 1 is a schematic cross-sectional view of a combustor according to an embodiment of the present invention.

Fig. 2 is a view in the direction of arrow II in Fig. 1.

Figure 3 shows a modified example of the configuration of the gas nozzle, which is the same as Figure 2 The drawing.

Fig. 4 is a view showing a modification example of the arrangement of the auxiliary gas nozzle, which is the same as Fig. 2.

Fig. 5 is a view showing a modified example of the arrangement of the auxiliary gas nozzle, which is the same as Fig. 2.

Fig. 6 is a view showing a modified example of the arrangement of the assisting gas nozzle, which is the same as Fig. 2.

Fig. 7 is an enlarged schematic view of the combustion-supporting gas nozzle of Fig. 1.

Fig. 8 is a schematic perspective view of the front end of the combustion-supporting gas nozzle.

Fig. 9 is a schematic perspective view of a combustion-supporting gas nozzle with a front end portion rotatable relative to the main body portion.

Fig. 10 is a schematic perspective view of the front end of Fig. 9.

The form used to implement the invention

(Overall composition)

Fig. 1 is a schematic cross-sectional view of a combustor 10 according to an embodiment of the present invention. Fig. 2 is a view in the direction of arrow II in Fig. 1. As shown in FIGS. 1 and 2, the combustor 10 includes a fuel nozzle 2 that injects fuel, and a fuel nozzle 2 that is provided on the outer periphery of the fuel nozzle 2 and injects a combustion-supporting gas that is mixed with the fuel injected from the fuel nozzle 2, such as oxygen. Multiple combustion-supporting gas nozzles 3, 4.

The combustion-supporting gas nozzles 3 and 4 are provided as a pair on the outer peripheral side of the fuel nozzle 2, and in the present embodiment, they are provided on the concentric circle of the fuel nozzle 2 so as to be vertically symmetrical when viewed from the inside S of the furnace. The combustion-supporting gas nozzle 3 is located above the fuel nozzle 2, and the combustion-supporting gas nozzle 4 is located below the fuel nozzle 2. The fuel nozzle 2 has a fuel opening 2a that opens to the furnace S, and the combustion-supporting gas nozzles 3 and 4 have combustion-supporting openings 3a, 4a that open to the furnace S, respectively. The combustion-supporting openings 3a and 4a are provided at positions opposed to the fuel opening 2a.

In the fuel nozzle 2, a fuel pipe 25 is connected to the upstream side of the fuel supply of the fuel nozzle 2. The fuel pipe 25 is provided with a supply valve 25a for opening and closing the fuel pipe 25 and an adjustment valve 25b for adjusting the fuel supply amount. The fuel injection amount of the fuel nozzle 2 can be changed by changing the opening and closing degree of the adjustment valve 25b.

The combustion-supporting gas nozzles 3 and 4 have the same structure, and the combustion-supporting gas nozzle 3 is used as an example for description.

(Combustible gas nozzle)

In the combustion-supporting gas nozzle 3, a gas pipe 35 is connected to the upstream side of the gas supply of the combustion-supporting gas nozzle 3. The gas pipe 35 is provided with a supply valve 35a for opening and closing the gas pipe 35 and an adjustment valve 35b for adjusting the gas supply amount. The gas injection amount of the combustion-supporting gas nozzle 3 can be changed by changing the opening and closing degree of the adjustment valve 35b.

The combustion-supporting gas nozzle 3 includes a main body portion 31 and a front end portion 32 located in the furnace S with respect to the main body portion 31 and attached to the main body portion 31. In the main body portion 31, a gas flow path 31a through which the combustion-supporting gas flows is formed, and similarly in the front end portion 32, an inclined flow path 32a through which the combustion-supporting gas flows is formed. The gas flow path 31 a extends in the axial direction of the main body portion 31. The inclined flow path 32a is inclined with respect to the axial direction of the main body portion 31. The inclined flow path 32a is inclined so as to approach the fuel opening 2a toward the combustion opening 3a. Then, the inclined flow path of the combustion-supporting gas nozzle 4 also opens toward the combustion-supporting opening 4a to approach the fuel. The way of the mouth 2a is inclined.

In addition, the furnace inner end surface 32 b of the front end portion 32 is located from the furnace wall surface 91 toward the inner side of the combustion-supporting gas nozzle 3. Among them, the furnace inner end surface 32b is formed at a position where the gas injected from the combustion opening 3a does not directly collide with the corner portion 92c of the furnace wall concave surface 92 sandwiched by the furnace wall surface 91 and the furnace inner end surface 32b.

Fig. 3 is a view similar to Fig. 2 showing a modification of the arrangement of the combustion-supporting gas nozzle. As shown in FIG. 3, the combustion-supporting gas nozzles 5 and 6 are provided as a pair on the outer peripheral side of the fuel nozzle 2. In this modification, they are provided on the concentric circle of the fuel nozzle 2 so as to be bilaterally symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 5 is located on the left of the fuel nozzle 2, and the combustion-supporting gas nozzle 6 is located on the right of the fuel nozzle 2. The combustion-supporting gas nozzles 5, 6 have combustion-supporting openings 5a, 6a that open to the furnace S, respectively. The combustion-supporting openings 5a, 6a are provided at positions opposed to the fuel opening 2a.

The combustion-supporting gas nozzles 5 and 6 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 5 is inclined so as to be separated from the fuel opening 2a toward the combustion-supporting opening 5a. Next, the inclined flow path of the combustion-supporting gas nozzle 6 is similarly inclined so as to be separated from the fuel opening 2a toward the combustion-supporting opening 6a.

Fig. 4 is a view similar to Fig. 2 showing a modification of the arrangement of the combustion-supporting gas nozzle. As shown in FIG. 4, the combustion-supporting gas nozzles 301 and 41 are provided as a pair on the outer peripheral side of the fuel nozzle 2. In this embodiment, they are provided on the concentric circle of the fuel nozzle 2 so as to be vertically symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 301 is located above the fuel nozzle 2, and the combustion-supporting gas nozzle 41 Located below the fuel nozzle 2. The combustion-supporting gas nozzles 301, 41 have combustion-supporting openings 301a, 41a that open to the furnace S, respectively. The combustion-supporting openings 301a and 41a are provided at positions opposed to the fuel opening 2a.

The combustion-supporting gas nozzles 51 and 61 are provided as a pair on the outer peripheral side of the fuel nozzle 2, and in this modification, they are provided on the concentric circle of the fuel nozzle 2 so as to be bilaterally symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 51 is located on the left of the fuel nozzle 2, and the combustion-supporting gas nozzle 61 is located on the right of the fuel nozzle 2. The combustion-supporting gas nozzles 51, 61 have combustion-supporting openings 51a, 61a that open to the furnace S, respectively. The combustion-supporting openings 51a and 61a are provided at positions opposed to the fuel opening 2a.

Next, the first straight line L1 passing through the centers of the combustion-supporting gas nozzles 301 and 41 intersects the second straight line L2 passing through the centers of the combustion-supporting gas nozzles 51 and 61. In this embodiment, the first straight line L1 and the second straight line L2 are configured to be perpendicular to each other.

The combustion-supporting gas nozzles 301 and 41 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 301 is inclined so as to approach the fuel opening 2a toward the combustion-supporting opening 301a. Next, the inclined flow path of the combustion-supporting gas nozzle 41 is the same, and is inclined so as to approach the fuel opening 2a toward the combustion-supporting opening 41a.

The combustion-supporting gas nozzles 51 and 61 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 51 is inclined so as to be separated from the fuel opening portion 2a toward the combustion-supporting opening portion 51a. Next, the inclined flow path of the combustion-supporting gas nozzle 61 is the same, and is inclined so as to be separated from the fuel opening 2a toward the combustion-supporting opening 61a.

Fig. 5 is a view similar to Fig. 2 showing a modification of the arrangement of the combustion-supporting gas nozzle. As shown in FIG. 5, the combustion-supporting gas nozzles 302 and 42 are provided as a pair on the outer peripheral side of the fuel nozzle 2. In this embodiment, they are provided on the concentric circle of the fuel nozzle 2 so as to be vertically symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 302 is located above the fuel nozzle 2, and the combustion-supporting gas nozzle 42 is located below the fuel nozzle 2. The combustion-supporting gas nozzles 302, 42 have combustion-supporting openings 302a, 42a that open to the furnace S, respectively. The combustion-supporting openings 302a and 42a are provided at positions opposed to the fuel opening 2a.

The combustion-supporting gas nozzles 52 and 62 are provided as a pair on the outer peripheral side of the fuel nozzle 2, and in this modification, they are provided on the concentric circle of the fuel nozzle 2 so as to be bilaterally symmetrical when viewed from the inside S of the furnace. The combustion-supporting gas nozzle 52 is located on the left of the fuel nozzle 2, and the combustion-supporting gas nozzle 62 is located on the right of the fuel nozzle 2. The combustion-supporting gas nozzles 52, 62 have combustion-supporting openings 52a, 62a that open to the furnace S, respectively. The combustion-supporting openings 52a and 62a are provided at positions opposite to the fuel opening 2a.

Next, the first straight line L3 passing through the centers of the combustion-supporting gas nozzles 302 and 42 intersects the second straight line L4 passing through the centers of the combustion-supporting gas nozzles 52 and 62. In this embodiment, the first straight line L3 and the second straight line L4 are configured to be perpendicular to each other.

The combustion-supporting gas nozzles 302 and 42 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 302 is inclined to the left as viewed from the furnace S toward the combustion-supporting opening 302a. Next, the inclined flow path of the combustion-supporting gas nozzle 42 is inclined to the right when viewed from the furnace toward the combustion-supporting opening 42a.

The combustion-supporting gas nozzles 52 and 62 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 52 is inclined downward when viewed from the furnace S toward the combustion-supporting opening 52a. Next, the inclined flow path of the combustion-supporting gas nozzle 62 is inclined upward when viewed from the furnace S toward the combustion-supporting opening 62a.

Therefore, the inclined flow paths of the combustion-supporting gas nozzles 302, 42, 52, and 62 respectively face the combustion-supporting openings 302a, 42a, 52a, and 62a in the same circumferential direction (counterclockwise direction with the fuel opening 2a as the center when viewed from the furnace S )tilt.

Fig. 6 is a view similar to Fig. 2 showing a modification of the arrangement of the combustion-supporting gas nozzle. As shown in FIG. 6, the combustion-supporting gas nozzles 303 and 43 are provided as a pair on the outer peripheral side of the fuel nozzle 2, and in this embodiment, they are provided on the concentric circle of the fuel nozzle 2 so as to be vertically symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 303 is located above the fuel nozzle 2, and the combustion-supporting gas nozzle 43 is located below the fuel nozzle 2. The combustion-supporting gas nozzles 303, 43 have combustion-supporting openings 303a, 43a that open to the furnace S, respectively. The combustion-supporting openings 303a and 43a are provided at positions opposed to the fuel opening 2a.

The combustion-supporting gas nozzles 53 and 63 are provided as a pair on the outer peripheral side of the fuel nozzle 2, and in this modification, they are provided on the concentric circle of the fuel nozzle 2 so as to be bilaterally symmetrical when viewed from the furnace S. The combustion-supporting gas nozzle 53 is located on the left of the fuel nozzle 2, and the combustion-supporting gas nozzle 63 is located on the right of the fuel nozzle 2. The combustion-supporting gas nozzles 53, 63 respectively have combustion-supporting openings 53a, 63a that open to the furnace S. The combustion-supporting openings 53a and 63a are provided at positions opposed to the fuel opening 2a.

Next, the first straight line L5 passing through the centers of the combustion-supporting gas nozzles 303 and 43 intersects the second straight line L6 passing through the centers of the combustion-supporting gas nozzles 53 and 63. In this embodiment, the first straight line L5 and the second straight line L6 are configured to be perpendicular to each other.

The combustion-supporting gas nozzles 303 and 43 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 303 is inclined to the left as viewed from the furnace S toward the combustion-supporting opening 303a. Next, the inclined flow path of the combustion-supporting gas nozzle 43 is inclined to the left as viewed from the furnace toward the combustion-supporting opening 43a.

The combustion-supporting gas nozzles 53 and 63 have the same structure as the combustion-supporting gas nozzle 3, and only the inclination of the inclined flow path is different. The inclined flow path of the combustion-supporting gas nozzle 53 is inclined to the left as viewed from the furnace S toward the combustion-supporting opening 53a. Next, the inclined flow path of the combustion-supporting gas nozzle 63 is inclined to the left as viewed from the furnace S toward the combustion-supporting opening 63a.

Therefore, the inclined flow paths of the combustion-supporting gas nozzles 303, 43, 53, and 63 are respectively inclined in the same direction (to the left as viewed from the furnace S) toward the combustion-supporting openings 303a, 43a, 53a, and 63a.

Fig. 7 is an enlarged schematic view of the combustion-supporting gas nozzle 3 of Fig. 1. As shown in FIG. 7, for the furnace outside T, a flange 37 protruding outward in the diameter direction is formed in the main body portion 31 of the combustion-supporting gas nozzle 3. In addition, the furnace body 1 is provided with a protruding portion 11 protruding toward the furnace outer T side, and a threaded portion 11 a is formed on the outer peripheral surface of the protruding portion 11. Next, a fixing member 38 that fixes the flange 37 and the protrusion 11 is provided in the combustion-supporting gas nozzle 3. The fixing member 38 is configured to be screwed to the threaded portion 11a. The fixing member 38 fixes the main body portion 31 to the furnace body 1, by removing Or, by loosening the fixing member 38, the combustion-supporting gas nozzle 3 can be rotated relative to the furnace body 1 around the axis of the main body 31.

The main body portion 31 and the front end portion 32 are formed integrally and can be rotated around the axis of the main body portion 31. By rotating the main body portion 31 and the front end portion 32, the inclination direction of the inclined flow path 32a formed in the front end portion 32 can be changed.

Because the inclined flow path 32 a is inclined with respect to the axis of the main body portion 31, the combustion-supporting opening portion 3 a is formed at a position offset from the center of the furnace inner end surface 32 b of the front end portion 32. However, as described above, when the combustion-supporting gas nozzle 3 is rotated with respect to the furnace body 1, the combustion-supporting opening portion 3 a also rotates with respect to the furnace inner side end surface 32 b of the front end portion 32. Next, because the inclined flow path 32a is inclined with respect to the axis of the main body portion 31, when the combustion-supporting gas nozzle 3 is rotated relative to the furnace body 1, the injection direction of the combustion-supporting gas nozzle 3 changes. Therefore, by using the fixing member 38 to change the fixing state of the main body portion 31 of the furnace body 1, the operation of changing the spray direction of the combustion-supporting gas nozzle 3 can be performed from the outside T of the furnace.

FIG. 8 is a schematic perspective view of the front end 32 of the combustion-supporting gas nozzle 3. As shown in FIG. 8, in the furnace inner end surface 32b of the front end portion 32, a guide groove 32c for guiding the injection direction of the injected combustion-supporting gas is formed around the combustion opening portion 3a of the inclined flow path 32a. The guide groove 32c is a groove recessed inward of the front end portion 32 in the furnace inner end surface 32b, and the outer edge of the furnace inner end surface 32b in the spray direction is cut into a groove shape.

According to the combustor 10 configured as described above, the second effect can be exerted.

(1) As shown in Figure 2, the combustion-supporting gas nozzles 3 and 4 are turned on The openings 3a, 4a are provided at positions facing up and down with respect to the fuel opening 2a of the fuel nozzle 2, and the inclined flow paths of the combustion-supporting gas nozzles 3, 4 are inclined so as to approach the fuel opening 2a toward the combustion-supporting openings 3a, 4a . Therefore, the shape of the flame F can be flattened by using the combustion-supporting gas from the combustion gas nozzles 3 and 4 to squeeze the flame from above and below.

(2) As shown in Figure 3, the combustion openings 5a, 6a of the combustion gas nozzles 5, 6 are provided at positions opposite to the fuel opening 2a of the fuel nozzle 2. The inclined flow of the combustion gas nozzles 5, 6 The path is inclined so as to be separated from the fuel opening 2a toward the combustion openings 5a, 6a. Therefore, the shape of the flame F can be flattened by expanding the flame to the left and right by the combustion-supporting gas supplied from the combustion gas nozzles 5 and 6.

(3) As shown in Fig. 4, the combustion openings 301a, 41a of the combustion gas nozzles 301, 41 are provided at positions facing up and down with respect to the fuel opening 2a of the fuel nozzle 2. The inclined flow of the combustion gas nozzles 301, 41 The path is inclined so as to approach the fuel opening 2a toward the combustion openings 301a and 41a. Next, the combustion-supporting openings 51a, 61a of the combustion-supporting gas nozzles 51, 61 are provided at positions opposite to the fuel opening 2a of the fuel nozzle 2, and the inclined flow paths of the combustion-supporting gas nozzles 51, 61 are directed toward the combustion-supporting openings. 51a and 61a are inclined so as to be separated from the fuel opening 2a. In addition, the first straight line L1 passing through the centers of the combustion-supporting gas nozzles 301 and 41 and the second straight line L2 passing through the centers of the combustion-supporting gas nozzles 51 and 61 are orthogonal to each other. Therefore, by using the combustion-supporting gas from the combustion gas nozzles 301 and 41 to squeeze the flame from the top and bottom, and using the combustion-supporting gas from the combustion gas nozzles 51 and 61 to expand the flame to the left and right, the shape of the flame F can be more up and down. Flat.

(4) As shown in FIG. 5, the combustion openings 302a, 42a of the combustion-supporting gas nozzles 302, 42 are provided at positions facing up and down with respect to the fuel opening 2a of the fuel nozzle 2. The inclined flow of the combustion-supporting gas nozzles 302, 42 The road is inclined to the left and right, respectively, when viewed from the furnace S, toward the combustion-supporting openings 302a and 42a. Next, the combustion-supporting openings 52a, 62a of the combustion-supporting gas nozzles 52, 62 are provided at positions opposite to the fuel opening 2a of the fuel nozzle 2, and the inclined flow paths of the combustion-supporting gas nozzles 52, 62 are directed toward the combustion-supporting opening 52a. , 62a are respectively inclined downward and upward when viewed from the furnace S. In other words, the inclined flow paths of the combustion-supporting gas nozzles 302, 42, 52, and 62 are each directed toward the combustion-supporting openings 302a, 42a, 52a, and 62a in the same circumferential direction (when viewed from the furnace S, the fuel opening 2a is inverted. Clock direction) tilt. In addition, the third straight line L3 passing through the centers of the combustion-supporting gas nozzles 302 and 42 is orthogonal to the fourth straight line L4 passing through the centers of the combustion-supporting gas nozzles 52 and 62. Therefore, the flame F uses the combustion-supporting gas from the combustion gas nozzles 302, 42, 52, and 62, and is formed as a swirling flow in the counterclockwise direction with the fuel opening 2a as the center as viewed from the furnace S, and can stir the furnace gas. It can make the temperature distribution in the furnace uniform. In addition, the direction of rotation may be clockwise, and the number of combustion-supporting gas nozzles is not limited to four, and plural may be sufficient.

(5) As shown in Figure 6, the combustion openings 303a, 43a of the combustion-supporting gas nozzles 303, 43 are provided at positions facing up and down with respect to the fuel opening 2a of the fuel nozzle 2. The inclined flow of the combustion-supporting gas nozzles 303, 43 The road is slanted to the left when viewed from the furnace S toward the combustion-supporting openings 303a and 43a. Next, the combustion-supporting openings 53a, 63a of the combustion-supporting gas nozzles 53, 63 are provided at positions facing left and right with respect to the fuel opening 2a of the fuel nozzle 2. The inclined flow paths of the combustion-supporting gas nozzles 53 and 63 are respectively inclined to the left as viewed from the furnace S toward the combustion-supporting openings 53a and 63a. In other words, the inclined flow paths of the combustion-supporting gas nozzles 303, 43, 53, and 63 are each inclined in the same direction (to the left as viewed from the furnace S) toward the combustion-supporting openings 303a, 43a, 53a, and 63a. In addition, the fifth straight line L5 passing through the combustion-supporting gas nozzles 303 and 43 and the sixth straight line L6 passing through the combustion-supporting gas nozzles 53 and 63 are orthogonal to each other. Therefore, the use of the combustion-supporting gas from the self-burning gas nozzles 303, 43, 53, and 63 can make the flame F have directivity, and the object can be directed toward the flame F, or the object can be prevented from directly contacting the flame F.

In addition, in FIG. 6, although the inclined flow paths of the combustion-supporting gas nozzles 303, 43, 53, 63 are inclined to the left toward their combustion-supporting openings, they may also be inclined to the right, upward, downward, or in any direction. Can. In addition, the number of combustion-supporting gas nozzles is not limited to four, and plural nozzles are acceptable.

In addition, in FIGS. 2 to 6, although the combustion-supporting openings of the combustion-supporting gas nozzles are arranged up and down and left and right with respect to the fuel opening 2a of the fuel nozzle 2, the arrangement with respect to the fuel opening 2a is not limited to up and down, left and right. It can be arranged in any direction in the fuel opening 2a.

(6) The fixing member 38 fixes the main body portion 31 and the furnace body 1. By removing or unscrewing the fixing member 38, the combustion-supporting gas nozzle 3 can be rotated relative to the furnace body 1. In other words, the inclined flow path 32a is provided so as to be rotatable relative to the furnace body 1. Therefore, by rotating the inclined flow path 32a with respect to the furnace body 1, the injection direction of the combustion-supporting gas can be changed. As a result, the shape of the flame can be flexibly changed in accordance with the shape of the furnace or the shape and characteristics of the processed material. Also, since the fixing member 38 is located outside the furnace T, it can be easily changed from outside the furnace T The injection direction of the combustion-supporting gas.

(7) With respect to the furnace inner end surface 32b of the front end portion 32, a guide groove 32c is formed around the combustion opening portion 3a of the inclined flow path 32a to guide the injection direction of the injected combustion gas. Therefore, the directivity of the injection direction of the combustion-supporting gas can be improved by the guide groove 32c. As a result, for example, when the combustion-supporting gas nozzle 3 sprays the combustion-supporting gas in a manner such that the flame is flattened or the flame is swirled, the flatness or swirling property of the flame can be improved by the guide groove 32c.

(8) The fuel injection amount of the fuel nozzle 2 can be changed by changing the opening and closing degree of the adjustment valve 25b, and the combustion gas injection amount of the auxiliary gas nozzle 3 can be changed by changing the opening and closing degree of the adjustment valve 35b. Therefore, the size or flatness of the flame can be easily changed by adjusting the amount of fuel injection and gas injection.

(9) The furnace inner side end surface 32b of the front end portion 32 is located from the furnace wall surface 91 to the inner side of the combustion-supporting gas nozzle 3. Therefore, the gas injected from the combustion opening portion 3a can be less affected by the gas environment in the furnace, and the directivity of the injection direction of the gas injected from the combustion opening portion 3a can be improved. In addition, by recessing the furnace inner end surface 32b from the furnace wall surface 91, a shaded portion can be formed on the furnace inner end surface 32b, and the furnace inner end surface 32b can be protected from the radiant heat in the furnace, thereby improving durability. However, the furnace inner side end surface 32b of the front end portion 32 is formed at a position where the gas injected from the combustion opening portion 3a does not collide with the corner portion 92c of the furnace wall concave surface 92. Therefore, even if the injection direction of the gas injected from the combustion-supporting opening 3a is changed, it is possible to prevent the injected gas from colliding with the corner 92c of the furnace wall concave surface 92, causing gas turbulence or heading toward the furnace. The spray direction inside changes.

(10) Since the combustion-supporting gas nozzle 3 includes the fixing member 38 that fixes the main body 31 and the furnace body 1, the inclined flow path 32a can be more reliably fixed in the specific spray direction for the furnace body 1.

(11) Since the fixing member 38 is configured to fix the main body 31 and the furnace body 1 from the outside T side of the furnace, it is possible to easily fix or spray the main body 31 from the outside T of the furnace without being affected by the gas environment in the furnace. Direction adjustment work.

(Other embodiments)

In the above embodiment, the combustion-supporting gas nozzle 3 is configured to be rotatable with respect to the furnace body 1, but in the combustion-supporting gas nozzle 3, the tip portion 32 may be configured to be rotatable with respect to the main body portion 31. FIG. 9 is a schematic perspective view of a combustion-supporting gas nozzle whose tip portion 32 is rotatable relative to the main body portion 31. As shown in FIG. 9, a threaded portion 31 b is formed on the outer peripheral surface of the furnace S side end of the main body portion 31, and the tip portion 32 is screwed to the threaded portion 31 b to be mounted on the main body portion 31. Therefore, the front end portion 32 is configured to be mounted so as to be rotatable relative to the main body portion 31. Next, by rotating the tip portion 32 relative to the main body portion 31 to adjust the tilt direction, the spray direction of the combustion-supporting gas nozzle 3 can be changed as in the case where the combustion-supporting gas nozzle 3 is rotated relative to the furnace body 1.

Fig. 10 is a schematic perspective view of the front end 32 of Fig. 9. As shown in FIG. 10, in the furnace inner side end surface 32b of the tip part 32, the slit groove 32d which can engage with the rotating jig which makes the tip part 32 rotate with respect to the main body part 31 is formed. The slit grooves 32d extend in the center direction from the outer peripheral edge of the furnace inner end surface 32b, and are formed, for example, two in a symmetrical manner with respect to the center. Slot groove 32d no It will interfere with the combustion opening 3a.

According to the other embodiments described above, the second effect can be exerted.

(1) By making the tip portion 32 rotatable with respect to the main body portion 31, the mechanism for adjusting the direction of the inclined flow path 32a can be reduced, and the structure of the combustion-supporting gas nozzle 3 can be simplified.

(2) By forming the slit groove 32d in the tip portion 32, the tip portion 32 can be easily rotated with respect to the main body portion 31. As a result, it is easy to change the injection direction of the combustion-supporting gas nozzle 3.

In the above-mentioned embodiment, the fuel injection amount can be changed by changing the opening and closing degree of the regulating valve 25b, but the fuel injection amount may be changed by changing the fuel supply pressure. In addition, the adjustment valve 25b may not be provided and the supply valve 25a may have the function of the adjustment valve 25b.

In the above-mentioned embodiment, the gas injection amount is changed by changing the opening and closing degrees of the adjustment valves 35b and 45b, but it is also possible to change the gas injection amount by changing the gas supply pressure. In addition, the adjustment valves 35b and 45b may not be provided and the supply valves 35a and 45a may have the functions of the adjustment valves 35b and 45b.

Various modifications and changes can be made without departing from the spirit and scope of the present invention described in the scope of the patent application.

Industrial availability

In the present invention, since it is possible to provide a burner capable of obtaining flames of various shapes, the industrial utility value is great.

2‧‧‧Fuel nozzle

2a‧‧‧Fuel opening

301‧‧‧Combustible gas nozzle

301a‧‧‧Combustion opening

41‧‧‧Combustible gas nozzle

41a‧‧‧Combustion opening

51‧‧‧Combustible gas nozzle

51a‧‧‧Combustion opening

61‧‧‧Combustible gas nozzle

61a‧‧‧Combustion opening

F‧‧‧flame

L1‧‧‧The first straight line

L2‧‧‧2nd straight line

Claims (2)

A combustor characterized by: a fuel nozzle that injects fuel; and two pairs of combustion-supporting gas nozzles that inject combustion-supporting gas are arranged on the outer peripheral side of the fuel nozzle, and the combustion-supporting openings of the two pairs of the combustion-supporting gas nozzles into the furnace The fuel nozzles are arranged at positions opposite to the fuel openings of the fuel nozzles into the furnace, and the front end of the combustion gas nozzle has an inclined flow path that is inclined with respect to the axial direction of the main body of the combustion gas nozzle. , The inclined flow path of the pair of combustion-supporting gas nozzles on one side is inclined so that the combustion-supporting opening is close to the aforementioned fuel opening, and the inclined flow path of the pair of combustion-supporting gas nozzles on the other side is directed toward the combustion-supporting opening from the aforementioned fuel The opening is inclined in such a way that the first straight line passing through the center of the pair of combustion-supporting gas nozzles on one side intersects the second straight line passing through the center of the pair of combustion-supporting gas nozzles on the other side. With respect to the rotation of the main body, a slit groove is formed in the furnace inner end surface of the front end to engage a rotating jig that allows the front end to rotate with respect to the main body. As in the burner of claim 1, a guide groove for guiding the injection direction of the combustion-supporting gas injected from the opening is formed in the opening of the front end portion into the furnace.

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