JPH11132419A - Burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner which can be readily set to every kind of combustion furnace while satisfactorily performing a primary burning with a mixture of a fuel gas and combustion promoting air and a secondary burning, by supplying a heated gas to the flame formed through the primary burning. SOLUTION: A fuel gas is supplied from a fuel gas supply port 2 of a fuel gas supplying portion Sg, and the fuel gas is burnt on supplement of combustion air from an air supply port 3 of an air supplying portion Sa which is arranged adjacent to the fuel gas supply port 2, thereby forming flame Fa. A heated gas containing a less amount of oxygen than air is fed to the flame Fa for combustion from a heated gas supply port 5 of a heated gas supplying portion Se, which is located at a distance as viewed along the direction of formation of the flame Fa, from and positioned at the same or substantially same position in the direction of formation of the flame Fa as the fuel gas supply port 2 and the air supply port 3 which are arranged adjacent thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel gas supplied from a fuel gas supply unit, which is supplied with combustion air from an air supply unit and burned. The present invention relates to a burner configured to supply and burn a heated gas having a lower oxygen content than air from a supply unit.

[0002]

2. Description of the Related Art Such a burner is used in a cogeneration system that uses exhaust heat of a gas turbine or a gas engine as a heat source for a boiler or the like, for heating exhaust gas from the gas turbine or the gas engine having a smaller oxygen content than air. It is used for. Exhaust gas from a gas turbine or a gas engine corresponds to the gas to be heated, and the oxygen content of the gas to be heated is small, for example, less than 12 wt% (weight percentage). Then, the combustion gas is supplied from the air supply unit to the fuel gas supplied from the fuel gas supply unit and burned, and the flame formed by the combustion is supplied with the heated gas from the heated gas supply unit and burned. However, instead of burning all of the fuel gas with the combustion air, the supply amount of the combustion air is reduced as much as possible, and a part of the fuel gas is burned with oxygen in the gas to be heated. The heating efficiency is made as high as possible.

A conventional burner will be described with reference to FIG. In FIG. 7, the flow of the fuel gas is indicated by a solid line arrow, the flow of the combustion air is indicated by an alternate long and short dash line arrow, and the flow of the gas to be heated is indicated by a broken line arrow. Fuel gas supply section Sg
Provided a tubular body 61 for supplying fuel gas, and the tubular body 6
A fuel gas ejection port 62 for ejecting fuel gas toward the front of the cylindrical body 61 is formed at the tip of the fuel gas ejection port 1. The air supply section Sa ejects combustion air from the fuel gas ejection port 62. An air flow passage 64 having an air jet port 63 for jetting toward the fuel gas is provided adjacent to the side of the cylindrical body 61. Here, a flame Fa formed by so-called primary combustion by mixing fuel gas ejected from the fuel gas ejection port 62 and combustion air ejected from the air ejection port 63.
When the gas to be heated is supplied to the root side of the fuel gas, the fuel gas and the combustion air are cooled by the gas to be heated, and the combustion reaction becomes unstable, especially when the turn-dern ratio is increased, and carbon monoxide gas is generated. Inconveniences, such as generation, occur. Therefore, in the related art, the partition wall 65 that separates so that the heated gas is not supplied to the root side portion of the primary combustion flame Fa is provided in a long shape along the flame forming direction, and the heated gas supply unit Se includes: Through the heated gas supply port 66 formed on the front side of the partition body 65 in the flame forming direction, the heated gas is supplied so as to flow from the outside to the inside of the partition body 65, and is supplied to the front side of the primary combustion flame Fa. , A flame Fb due to the secondary combustion is formed. The burner having the above-described configuration is arranged in the combustion chamber 68 through which the gas to be heated flows, with the front side in the longitudinal direction of the cylindrical body 61 facing the flow direction of the gas to be heated.

[0004]

In the above-mentioned conventional burner, since the partition wall for separating the gas to be heated from the primary combustion flame Fa projects in the flame forming direction, the burner has a large and complicated shape. Therefore, in order to install it as a burner of a combustion furnace, a large remodeling of the furnace side is required, and there is a problem that it is not easy to install it in various combustion furnaces.

The present invention has been made in view of such circumstances, and has as its object to perform primary combustion by mixing fuel gas and combustion air, and to apply a heated gas to a flame formed by the primary combustion. An object of the present invention is to provide a burner which can be easily installed in various types of combustion furnaces while performing the secondary combustion performed by supplying the gas.

[0006]

According to the first aspect of the present invention, the fuel gas supplied from the fuel gas supply port of the fuel gas supply section is supplied with the air of the air supply section located adjacent to the fuel gas supply port. The combustion air is supplied from the supply port and burns to form a flame, and the fuel gas supply port and the air supply port are arranged at an interval with respect to the adjacent fuel gas supply port and the air supply port as viewed in the flame formation direction. At the same time, from the heated gas supply port of the heated gas supply unit located at the same or substantially the same position in the flame forming direction, a heated gas having a smaller oxygen content than air is supplied to the flame and burned. . Accordingly, the fuel gas supply port, the air supply port, and the heated gas supply port are located at the same or substantially the same position in the flame forming direction so that there is no protrusion in the flame forming direction. As compared with a conventional burner having a shape protruding in the flame forming direction as shown in FIG. 7, a simple installation structure in which the burner is installed on the furnace wall while minimizing the modification on the combustion furnace side where the burner is installed is minimized. A burner that can be easily installed in various combustion furnaces can be obtained. In addition, since the heated gas supply port is arranged at an interval from the fuel gas supply port and the air supply port in the flame formation direction, the combustion gas is supplied to the fuel gas. At the time of combustion, it is possible to avoid mixing of the gas to be heated and to perform appropriate combustion, and then supply and heat the gas to be heated with respect to the flame formed by the combustion. The so-called primary combustion performed by supplying combustion air to the gas, and the so-called secondary combustion performed by supplying a heated gas to a flame formed by the primary combustion, can be performed favorably. it can.

According to the configuration of claim 2, in claim 1, as shown in FIGS. 1 and 3, the fuel gas (solid arrow) extends from the fuel gas supply port 2 in a direction intersecting the direction in which the flame Fa is formed. Is indicated), and the flame F is injected from the air supply port 3.
Combustion air (indicated by an alternate long and short dash line) is supplied along the formation direction of a. Therefore, by causing the fuel gas to collide with the combustion air in a state of intersecting and promoting the mixing,
The primary combustion can be performed favorably, and the preferable means of claim 1 can be obtained.

According to the third aspect of the present invention, as shown in FIGS. 1 and 3, the flame Fa from the air supply port 3 formed at the tip of the cylindrical body 4 provided in the air supply part Fa. The combustion air is supplied along the forming direction of the cylinder, and the pipe P provided in the fuel gas supply unit Fg is disposed inside the cylinder 4 and is positioned inside the tip end of the cylinder 4. From the fuel gas supply port 2 formed at the tip of the pipe P
Fuel gas is jetted in a direction intersecting with the direction in which the flame Fa is formed. Therefore, the fuel gas ejected from a position inside the tip of the cylinder 4 in a direction intersecting with the direction in which the flame Fa is formed, and the fuel gas is supplied from the tip of the cylinder 4 along the direction in which the flame Fa is formed. The mixed gas that has been mixed by collision with the combustion air flows properly in the direction of formation of the flame along the axis of the cylinder by the guiding action of the cylinder 4, and the primary combustion flame Fa Can be formed in a stable state, and the preferable means of claim 2 can be obtained.

According to the structure of claim 4, in claim 3, as shown in FIGS. 1 and 3, the fuel gas supply port 2 formed in the peripheral portion of the disc-shaped portion 1 provided in the pipe body P A mixed gas of the fuel gas to be ejected and the combustion air supplied from the air supply port 3 on the distal end side of the cylindrical body 4 has a tip end of the cylindrical body 4 formed in an outwardly expanding shape having a larger diameter toward the distal end side. Due to the portion, it flows outwardly and annularly when viewed in the formation direction of the flame Fa. Therefore, since the annular flame Fa is formed in the flame formation direction, the range in which the gas to be heated is heated by the annular flame Fa is widened, and the gas to be heated is burned in a more favorable state (secondary). Combustion), thereby obtaining the preferred measure of claim 3.

According to the structure of claim 5, in any one of claims 1 to 4, as shown in FIGS. 1, 2, and 5, the flame Fa is formed in an annular shape when viewed in the forming direction. The heated gas is supplied from the heated gas supply port 5 to the flame Fa and burns. Therefore, the heated gas supply port 5
The gas to be heated can be satisfactorily supplied to the flame Fa while being formed in a simple shape that only surrounds the fuel gas supply port 2 and the air supply port 3 in a ring shape at an interval. The preferred means of any one of (1) to (4) is obtained.

According to the configuration of claim 6, in any one of claims 1 to 4, as shown in FIGS. 3 and 4, the flame Fa is dispersed in a circumferential direction when viewed in the forming direction of the flame Fa. The heated gas is supplied to the flame Fa from the plurality of heated gas supply ports 5a and 5b, and burns. Therefore, from the plurality of heated gas supply ports 5a and 5b dispersedly formed at intervals from the fuel gas supply port 2 and the air supply port 3,
Since the gas to be heated is supplied to the flame Fa, the state of the flame Fa is less disturbed compared to supplying the gas to be heated in a state surrounding the entire circumference of the fuel gas supply port 2 and the air supply port 3. , Can keep the flame state stable,
The preferred means of any one of claims 1 to 4 is obtained.

According to the structure of claim 7, the fuel gas supply port 2 and the air supply port 3 located adjacent to each other as shown in FIGS. An auxiliary air supply port 6 of an auxiliary air supply unit Sh for supplying auxiliary air for combustion is provided on the outer side and on the inner side of the heated gas supply port 5 in a direction in which the flame Fa is formed. The air supply unit S is formed at the same or substantially the same position as each of the port 2, the air supply port 3, and the heated gas supply port 5.
The air supply amount of the auxiliary air supply unit S is adjusted by the adjusting means D1.
The air supply amount of h is adjusted individually by the adjusting means D2. Therefore, the auxiliary air supply port 6 is located at the same or substantially the same position as the fuel gas supply port, the air supply port, and the heated gas supply port in the flame formation direction so that there is no protrusion in the flame formation direction. However, for example, when the gas to be heated is not supplied from the gas supply port 5 to be heated, the adjusting means D2 on the auxiliary air supply unit Sh side is adjusted to allow the combustion of the fuel gas and the combustion air from the auxiliary air supply port 6. The auxiliary air for combustion can be supplied to the formed flame so that the secondary combustion can be favorably performed. By adjusting the supply amount of combustion air supplied from the air supply port 3 by the adjusting means D1 on the supply section Sa side, the secondary combustion by oxygen in the gas to be heated can be appropriately performed, for example, the heating target can be appropriately heated. Gas supply condition changes Also it is possible to perform appropriate secondary combustion in case, you have to, suitable means of any one of claims 1 to 6 is obtained.

According to the construction of claim 8, in claim 7, as shown in FIG. 3 and FIG.
Are arranged at an interval with respect to the auxiliary air supply port 6 when viewed in the direction in which the flame Fa is formed. Therefore, for example, when the heated gas is supplied from the heated gas supply port 5, the combustion air supplied from the air supply port 3 is supplied by adjusting and supplying the combustion auxiliary air from the auxiliary air supply port 6. By supplying the fuel gas supplied from the fuel gas supply port 2 as primary combustion air and burning it, primary combustion can be performed favorably even when the turn-dern ratio is increased. Thus, the preferable means of claim 7 is obtained.

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS. The burner B supplies combustion air from the air supply unit Sa to the fuel gas supplied from the fuel gas supply unit Sg and burns the fuel gas. The flame Fa formed by the combustion is supplied from the heated gas supply unit Se to the flame Fa. It is configured to supply and burn a heated gas having an oxygen content smaller than that of air (for example, less than 12 wt%).

The fuel gas supply section Sg is provided with a pipe P having a fuel gas supply port 2 formed at the end thereof, and the pipe P is distributed around the fuel gas supply port 2 around the entire circumference. It has a disk-shaped part 1 formed as follows. The pipe P
Has a circular tubular shape. The air supply section Sa is configured to include a cylindrical body 4 having an air supply port 3 formed at a tip thereof,
The pipe P is disposed inside the cylinder 4 with the fuel gas supply port 2 positioned inside the distal end of the cylinder 4, and the fuel gas supply port of the fuel gas supply section Sg is provided. 2 and the air supply port 3 of the air supply part Sa are located adjacent to each other. Here, the tubular body 4 is formed in a cylindrical shape, and the tubular body P and the disc-shaped portion 1 are provided at the cylindrical axis position of the cylindrical tubular body 4.
Are located coaxially. A fuel gas supply passage 12 is connected to the base end of the pipe P so as to supply fuel gas (see FIG. 6).

The fuel gas supply port 2 is oriented in a direction intersecting the direction in which the flame Fa is formed (the disc-shaped portion 1).
While the fuel gas is ejected (toward the outside of the periphery), the air supply port 3 supplies combustion air along the direction in which the flame Fa is formed. Is formed in an outwardly expanding shape having a larger diameter toward the front end side, so that the mixed gas of the fuel gas and the combustion air flows outwardly in an outwardly expanding shape and annularly when viewed in the direction of formation of the flame Fa. It is configured.

The heated gas supply section Se is provided with the flame F
A heated gas supply port 5 is formed in an annular shape coaxially with the position of the cylindrical axis of the cylindrical body 4 when viewed in the forming direction of a. The heated gas supply port 5 is connected to the fuel gas supply port 2 and the air supply port 3 by the flame Fa.
In the formation direction of the, while being arranged at an interval,
Each of the fuel gas supply port 2, the air supply port 3, and the heated gas supply port 5 is located at substantially the same position in the direction in which the flame Fa is formed.

Further, auxiliary fuel for supplying combustion auxiliary air to the outside of the adjacent fuel gas supply port 2 and air supply port 3 and to the inside of the heated gas supply port 5 is provided. The auxiliary air supply port 6 of the air supply part Sh is connected to the flame Fa.
Is formed in an annular shape coaxially with the position of the cylinder axis of the cylinder 4 when viewed in the direction of formation of the cylinder 4, and in the formation direction of the flame Fa,
The fuel gas supply port 2, the air supply port 3, and the heated gas supply port 5 are formed at substantially the same positions.

A cylindrical cylinder 7 having a larger diameter than the cylindrical body 4 and a cylindrical body 8 having a larger diameter than the cylindrical body 7 are provided coaxially with the axis of the cylindrical body 4, respectively. The annular space formed between the cylindrical body 4 and the cylindrical body 7 functions as a flow path for auxiliary air for combustion, and the annular space formed between the cylindrical body 7 and the cylindrical body 8 serves as a flow path for the gas to be heated. It works.

The air supplied from the air supply path 13 (see FIG. 6) is divided into a flow path on the side of the air supply section Sa and a flow path on the side of the auxiliary air supply section Sh to flow therethrough. In each branch, a damper D1 as an adjusting unit for adjusting the air supply amount of the air supply unit Sa and a damper D2 as an adjustment unit for adjusting the air supply amount of the auxiliary air supply unit Sh are separately provided. Is provided.

The heated gas supply section Se is formed by placing a rectangular box 15 which is flat in the front-rear direction and has an open front side, on a furnace wall 14 of a combustion chamber such as a boiler so as to close the front opening of the box 15. The gas to be heated is attached to the furnace wall 14 in a state where the gas to be heated is formed in contact with the furnace wall 14, and the gas to be heated flows through an adjustment port D3 from an inflow port 16a provided on the lower side of the flow chamber 16. ing. Then, at two locations spaced apart in the vertical direction of the box body 15, the cylindrical body 8,
A burner section including the cylinder 7, the cylinder 4, the pipe P, and the like is provided so as to penetrate the box 15, and the heated gas flowing into the flow chamber 16 is formed into a ring-shaped heated gas of each of the burners. It flows to the supply port 5.

Next, the flow of the fuel gas, the combustion air, the auxiliary combustion air, and the gas to be heated will be described with reference to FIG. In FIG. 1, the flow of the fuel gas is indicated by a solid line arrow, the flow of the combustion air and the flow of the auxiliary combustion air are indicated by an alternate long and short dash line arrow, and the flow of the gas to be heated is indicated by a broken line arrow. The fuel gas is ejected from the fuel gas supply port 2 to the outside of the periphery of the disk-shaped portion 1, and the combustion air is supplied in a state of flowing toward the air supply port 3 on the tip end side of the cylindrical body 4. The fuel gas ejected from the fuel gas supply port 2 collides and mixes with the fuel gas and burns, thereby forming an annular flame Fa in a flame forming direction. When the damper D2 is fully closed and the auxiliary combustion air is not supplied from the auxiliary air supply port 6, the flame Fa is supplied from the heated gas supply port 5 to the outside of the annularly formed flame Fa. Is mixed with the flame Fa, and the unburned fuel gas in the fuel gas is burned by the oxygen in the heated gas.

Incidentally, the supply amounts of the fuel gas and the combustion air are adjusted according to the conditions of the gas to be heated, for example, the temperature, the oxygen content and the like. Hereinafter, the result of an experiment using the burner configured as described above will be described. For example, the temperature of the heated gas is 470 ° C., the oxygen content is 10 wt%, and the amount is 440.
In the case of 0 Nm ³ / H, for example, the fuel gas supply amount is 200
Nm ³ / H, air ratio 0.2 (combustion air amount, 660 N
m ³ / H) to 0.7 (combustion air amount, 1540 Nm ³ /
Good results were obtained in the range of H). At this time, the generated amount of CO gas is 0 ppm, and the generated amount of NOx is 20 to 30.
ppm (O ₂ = 0%). Further, depending on the condition of the oxygen content of the gas to be heated, the air ratio is 0.5 to 0.9 when the oxygen content is 5 wt%, and the air ratio is 0.2 to 0.7 when the oxygen content is 10 wt%. When the oxygen content was 14 wt%, good results were obtained by adjusting the air ratio to 0 to 0.5. In this case, an oxygen sensor for detecting the oxygen content of the gas to be heated is provided, and the damper D1 and the like are automatically controlled based on the detection information of the oxygen sensor, and the optimum air according to the oxygen content of the gas to be heated is provided. It can be automatically adjusted to the ratio.

When the heated gas is not supplied from the heated gas supply port 5, the damper D2 is operated to the open state,
Auxiliary air for combustion is supplied from the auxiliary air supply port 6 toward the front side of the annularly formed flame Fa and mixed with the flame Fa, so that unburned fuel gas in the fuel gas is burned into the auxiliary combustion gas. It can be burned by the oxygen of the air.

Next, a cogeneration apparatus configured to heat the exhaust gas of a gas turbine using the burner configured as described above will be described with reference to FIG. The cogeneration device includes a combustor 41 that burns fuel gas supplied through a fuel gas supply path 56, a gas turbine 42 driven by hot air from the combustor 41, and a heat turbine connected to the gas turbine 42. A compressor 43 for supplying compressed air to the combustor 41; a generator 44 operatively connected to the gas turbine 42; an exhaust heat boiler 45 using exhaust gas from the gas turbine 42 as a gas to be heated as a heat source; A chimney 46 for discharging exhaust gas from the boiler 45 is a main component.

The exhaust gas from the gas turbine 42 flows through the first heat exchanger 48 via the exhaust gas supply path 52, and then flows into the burner B attached to the wall of the combustion furnace of the exhaust heat boiler 45. The exhaust heat boiler 45 includes the burner B, the second heat exchanger 49, the third heat exchanger 50, and the hot water storage tank 51 configured as described above, which are sequentially arranged from the upper side to the lower side in the exhaust gas flow direction. Is the main component. The first heat exchanger 48 is heated by the exhaust gas from the gas turbine 42, and the second heat exchanger 49 and the third heat exchanger 50
Is heated by the combustion gas.

A water supply passage 53 is connected to an inlet of the third heat exchanger 50, and an outlet of the third heat exchanger 50 is connected to the hot water storage tank 51, so that water from the water supply passage 53 is supplied to the third heat exchanger 50. The heat is preheated by the heat exchanger 50 and supplied to the hot water storage tank 51. Each of the inlet and outlet of the second heat exchanger 49 is connected to the hot water storage tank 51 so that the hot water in the hot water storage tank 51 is circulated and heated.

The gas phase of the hot water storage tank 51 and the first heat exchanger 4
8 is connected to the inlet of the first heat exchanger 48 and the combustor 41 by a superheated steam path 55, and the gas phase of the hot water storage tank 51 is saturated. The steam is superheated in the first heat exchanger 48, and the superheated steam is supplied to the combustor 41.

The burner B is connected to a fuel gas supply path 12 for supplying fuel gas and an air supply path 13 for supplying air for combustion from the blower 57. The fuel gas supply path 12 is provided with two shut-off valves V1 and a flow control valve V2 for controlling the amount of fuel gas supplied to the burner B. That is, the amount, temperature,
The fuel gas supply amount and the combustion air supply amount to be supplied to the burner B are adjusted by the flow rate control valve V2 and the dampers D1 and D2 provided in the burner B according to the oxygen content. Thereby, in the operating state of the gas turbine,
Even if the amount of exhaust gas, the temperature, the oxygen content changes, or the gas turbine stops, and the exhaust gas stops, the damper D1,
By adjusting the amount of combustion air in D2, the burner can be operated continuously.

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a plurality of the heated gas supply ports 5 are formed in a state of being dispersed in the circumferential direction when viewed in the formation direction of the flame Fa, and the heated gas supply ports 5 are connected to the auxiliary air supply port 5. It is arranged at an interval with respect to the mouth 6 when viewed in the direction of formation of the flame Fa, and is otherwise the same as the first embodiment. Specifically, the plurality of heated gas supply ports 5 are composed of two kinds, a small-diameter supply port 5a and a large-diameter supply port 5b, and two large-diameter supply ports 5b are arranged in the horizontal direction. The four small-diameter supply ports 5a are arranged in the middle of the burner part located at the side and the upper side of the upper burner part, and the four small-diameter supply ports 5a are arranged at the side and the lower side of the lower burner part. Mouth 5a
Is arranged. In addition, the flow chamber 1 of each supply port 5a, 5b
On the 6 side, cylindrical portions 9 and 10 for guiding the gas to be heated while flowing toward the supply ports 5a and 5b are connected.

In the second embodiment, similarly to the first embodiment, the heated gas is supplied from the heated gas supply port 5 to the flame Fa without supplying the auxiliary combustion air from the auxiliary air supply port 6. To the secondary combustion, and
In a state where the gas to be heated is not supplied from the gas supply port 5 to be heated, auxiliary air for combustion is supplied to the flame Fa from the auxiliary air supply port 6 to perform secondary combustion. Further, in the second embodiment, the heated gas supply ports 5a and 5b are arranged at a distance from the auxiliary air supply port 6 in the direction in which the flame Fa is formed. When the gas to be heated is supplied from the heating gas supply port 5, the auxiliary combustion air from the auxiliary air supply port 6 is supplied as primary combustion air in addition to the combustion air from the air supply port 3. Primary combustion can be performed in a stable state even under conditions that increase the supply amount of fuel gas (for example, turn-Dahn ratio, 20 to 1).

[Another Embodiment] Next, another embodiment will be described. In the first embodiment, the heated gas supply port 5
Is not limited to the configuration formed adjacent to the auxiliary air supply port 6 as shown in FIG. For example, as shown in FIG. 5, a heated gas supply port 5 having an annular inner edge 5c spaced sufficiently from the auxiliary air supply port 6 and having an outer periphery formed in a rectangular shape in a front view. May be.

In the second embodiment, the shape, size, number, arrangement position, and the like of the plurality of heated gas supply ports 5a and 5b dispersedly formed can be appropriately changed.

In the above embodiment, each of the fuel gas supply port 2, the air supply port 3, the heated gas supply port 5, and the auxiliary air supply port 6 is located at substantially the same position in the direction in which the flame Fa is formed. However, these ports may be located at the same position in the direction in which the flame Fa is formed.

The cylinder 4 provided in the air supply section Sa may be a rectangular cylinder other than a cylinder. The flow path forming body provided in the fuel gas supply section Sg is not limited to the pipe P, and may be, for example, a cylindrical body such as a cylinder coaxial with the cylindrical body 4 as the air supply path. The cross-sectional shape of the tubular body P can be formed in various shapes such as a rectangular tubular shape and a polygonal tubular shape in addition to the circular tubular shape.

In the cogeneration system illustrated in the first embodiment, a temperature sensor for detecting the temperature of the exhaust gas from the gas turbine 42 is provided, and the flow control valve V2 and the damper D1 are detected based on the information detected by the temperature sensor.
A control device for automatically adjusting the operation may be provided. in this case,
The air ratio can be optimally adjusted according to the temperature of the exhaust gas and the O ₂ concentration.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of a burner according to a first embodiment.

FIG. 2 is a front view of the burner according to the first embodiment.

FIG. 3 is a longitudinal sectional side view of a burner according to a second embodiment.

FIG. 4 is a front view of a burner according to a second embodiment.

FIG. 5 is a front view of a burner according to a modification of the first embodiment.

FIG. 6 is a block diagram of a cogeneration device equipped with a burner.

FIG. 7 is a vertical side view of a conventional burner.

[Explanation of symbols]

 Reference Signs List 1 disc-shaped portion 2 fuel gas supply port 3 air supply port 4 cylinder 5 heated gas supply port 5a heated gas supply port 5b heated gas supply port 6 auxiliary air supply port D1 adjusting means D2 adjusting means Sa air supply section Se Heated gas supply section Sg Fuel gas supply section Sh Auxiliary air supply section P Tube

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yutaka Takamatsu 1-338 Nonakakita, Yodogawa-ku, Osaka-shi, Osaka Inside Volcano Co., Ltd. (72) Inventor Minoru Soejima 1-3-3 Nonakakita, Yodogawa-ku, Osaka-shi, Osaka No. 38 Inside Volcano Co., Ltd.

Claims (8)

[Claims] A fuel gas supplied from a fuel gas supply unit is supplied with combustion air from an air supply unit and burned, and a flame formed by the combustion is supplied with an oxygen content from a heated gas supply unit. Is a burner configured to supply and burn a heated gas smaller than air, wherein a fuel gas supply port of the fuel gas supply unit and an air supply port of the air supply unit are positioned adjacent to each other. In addition, the heated gas supply port of the heated gas supply unit is disposed at intervals with respect to the fuel gas supply port, the air supply port, And a burner in which each of the heated gas supply ports is located at the same or substantially the same position in the flame formation direction. 2. The fuel gas supply port is configured to eject a fuel gas in a direction intersecting with the direction in which the flame is formed. The air supply port performs combustion along the direction in which the flame is formed. The burner according to claim 1, wherein the burner is configured to supply working air. 3. The air supply section includes a tubular body having the air supply port formed at a tip thereof, and the fuel gas supply section includes a tube body having the fuel gas supply port formed at a tip end. 3. The burner according to claim 2, wherein the tube is disposed inside the cylinder with the fuel gas supply port located inside a tip end of the cylinder. 4. 4. The tubular body is provided with a disk-shaped portion that forms the fuel gas supply port in a peripheral portion, and the distal end of the tubular body is formed in an outwardly expanding shape having a larger diameter toward the distal end. The burner according to claim 3, wherein the burner is configured to flow the mixed gas of the fuel gas and the combustion air in an outwardly expanding shape and in an annular shape when viewed in the direction in which the flame is formed. 5. The burner according to claim 1, wherein the heated gas supply port is formed in an annular shape when viewed in the direction in which the flame is formed. 6. The burner according to claim 1, wherein a plurality of the heated gas supply ports are formed so as to be dispersed in a circumferential direction as viewed in a direction in which the flame is formed. 7. An auxiliary air supply for supplying auxiliary combustion air outside the fuel gas supply port and the air supply port located adjacent to each other and inside the heated gas supply port. An auxiliary air supply port is formed at the same or substantially the same position as each of the fuel gas supply port, the air supply port, and the heated gas supply port in the flame forming direction, and the air The burner according to any one of claims 1 to 6, wherein adjusting means for adjusting the air supply amount of the supply unit and adjusting means for adjusting the air supply amount of the auxiliary air supply unit are separately provided. . 8. The burner according to claim 7, wherein the heated gas supply port is arranged at a distance from the auxiliary air supply port as viewed in the flame formation direction.