JP3976464B2 - Fluid mixer and burner apparatus using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used when air and fuel gas are mixed in a burner device of a gas turbine engine in a cogeneration system for performing district heating or the like, a burner device of an incinerator, and the like. Is provided between the first flow path through which the second fluid flows and the second flow path parallel to the first flow path through which the second fluid flows, and the second fluid in the second flow path is disposed in the first flow path. The present invention relates to a fluid mixer that supplies and distributes a first fluid, and a burner device that uses the fluid mixer for a gas turbine engine or an incinerator.
[0002]
[Prior art]
As the fluid mixer, for example, for a burner device, one previously developed by the present inventors is known.
That is, a pipe material that communicates with the second flow path at one end along a direction away from the second flow path in the first flow path width direction, and a plurality of supply ports are connected to the pipe material in the length direction of the pipe (first 1 channel width direction) is formed at an appropriate interval, and the second fluid is supplied into the first channel by supplying the second fluid in the second channel to each supply port using the pipe interior space as the supply channel. The second fluid was mixed with the first fluid by being distributedly supplied.
The burner device includes an inner cylinder that defines the second flow path, an intermediate cylinder that defines the third flow path that surrounds the inner cylinder, and an outer cylinder that defines the first flow path that surrounds the intermediate cylinder. A cylinder, air supply means for supplying air to the first flow path and the third flow path, first gas supply means for supplying fuel gas to the second flow path, and the third flow path. Second gas supply means for supplying fuel gas is provided, and a plurality of the fluid mixers are dispersedly arranged in the circumferential direction. That is, the air-fuel mixture of air and fuel gas from the third flow path is subjected to pilot combustion, and the air-fuel mixture of air and fuel gas from the first flow path is subjected to main combustion.
When the fluid mixer is used, the supply ports for supplying the fuel gas in the first flow path are distributed in the width direction of the first flow path, so that the fuel gas is distributed and supplied in the first flow path. Therefore, there is an advantage that the mixing property of the air and the fuel gas in the first flow path can be improved.
In addition, when using the burner device, the fluid mixers are distributed in the circumferential direction, so that the fuel gas can be distributed and supplied to the first flow path in the circumferential direction, so that the air in the first flow path can be supplied. There is an advantage that the mixing property of the fuel and the fuel gas can be made good and the combustibility can be made high.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional technique, the pipe inner space is formed with respect to the plurality of supply ports that are formed in the pipe length direction so as to be distributed in the first flow path width direction. Since the second fluid such as the fuel gas is supplied through one supply path, the pressure loss increases when the fuel gas is supplied uniformly from each of the plurality of supply ports.
[0004]
The object of the present invention is to provide a fluid mixer that can reduce the pressure loss while ensuring the desired good mixing property by dispersing and supplying the second fluid into the first flow path. This is to provide a burner device that can reduce the pressure loss while ensuring the desired good combustibility.
[0005]
[Means for Solving the Problems]
The features / actions / effects of the fluid mixer of the present invention according to claim 1 are as follows.
[0006]
〔Characteristic〕
A first flow path through which the first fluid flows and a second flow path in parallel with the first flow path through which the second fluid flows are provided to allow the second fluid in the second flow path to flow through the first flow path. A fluid mixer that supplies and distributes to the first fluid in the channel, and is disposed in the first channel in a state of being dispersed in the first channel width direction that is a direction away from the second channel. And a plurality of supply paths for guiding the second fluid to the plurality of supply ports independently from the second flow path, in the direction in which the first fluid flows in the first flow path. A plate-like body disposed along the plate-like body, wherein the plurality of supply paths are formed in the plate-like body, and the plurality of supply ports are formed on end surfaces of the plate-like body .
[0007]
[Action]
Since the plurality of supply ports are dispersed in the first flow path width direction, the second fluid is excellent in the first flow path width direction by supplying the second fluid from each of the plurality of supply ports. Can be dispersed.
In addition, in order to guide the second fluid from the second flow path to the plurality of supply ports, a plurality of supply paths for guiding the second fluid to the plurality of supply ports are provided independently from the second flow path. Compared to the conventional case in which the second fluid in the second flow path is collectively guided to the plurality of supply ports by one supply path, the pressure loss is reduced while the fuel gas is uniformly supplied from the plurality of supply ports. be able to.
Furthermore, a plurality of supply passages are formed in the plate-like body disposed in the first flow path along the flow direction of the first fluid, and a plurality of supply ports are formed on the end surface of the plate-like body. And since the plate-shaped body which forms a supply path and a supply port is what follows the flow direction of a 1st fluid, even if it provides several supply paths and a supply port, it obstructs the flow of the 1st fluid for that purpose There is little to do.
In addition, since a plurality of supply paths and supply ports are formed in the plate-like body and unitized, handling such as assembly is easy.
[0008]
〔effect〕
Therefore, since the second fluid can be dispersed well, the pressure loss can be reduced while ensuring good mixing of the first fluid and the second fluid.
Furthermore, the second fluid can be distributed and supplied to the first fluid in a state in which the flow performance of the first fluid in the first flow path is favorably maintained, and while providing a plurality of supply paths and supply ports, It has become possible to make it easier to handle and store.
[0009]
The features / actions / effects of the fluid mixer of the present invention according to claim 2 are as follows.
[0010]
〔Characteristic〕
In the fluid mixer according to the first aspect of the present invention, the plurality of supply ports are opened in the same direction.
[0011]
[Action]
Since the plurality of supply ports are opened in the same direction and the flow direction of the second fluid supplied from the supply ports into the first flow path is made the same, for example, the second fluid is supplied in various directions from each supply port. Compared to the supply, the second fluid is easily dispersed in the first flow path.
[0012]
〔effect〕
Therefore, it has become possible to exhibit excellent dispersibility by synergy between the fact that the second fluid can be dispersed by arranging a plurality of supply ports in a distributed manner and that the second fluid can be uniformly dispersed with the supply from the supply ports. .
[0013]
The features / actions / effects of the fluid mixer of the present invention according to claim 3 are as follows.
[0014]
〔Characteristic〕
In the fluid mixer according to the first aspect of the present invention, the end face of the plate-like body in which the plurality of supply ports are formed is closer to the second flow path side toward the downstream side in the flow direction of the first fluid. It is in the point arranged in the position which is located.
[0015]
[Action]
Since the end face of the plate-like body in which a plurality of supply ports are formed is arranged in a posture closer to the second flow path side as the portion on the downstream side in the flow direction of the first fluid, an appropriate interval is provided along the end face. By forming a plurality of supply ports, the plurality of supply ports can be dispersedly arranged in the first flow path width direction. In other words, a plurality of linear through-holes along the first flow path width direction are formed in the plate-like body at appropriate intervals along the end surface, thereby being distributed and arranged in the first flow path width direction. A plurality of supply ports and a plurality of supply paths corresponding to each of them can be formed.
[0016]
〔effect〕
Therefore, the structure can be configured easily and inexpensively.
[0017]
The features / actions / effects of the fluid mixer of the present invention according to claim 4 are as follows.
[0018]
〔Characteristic〕
A first flow path through which the first fluid flows and a second flow path in parallel with the first flow path through which the second fluid flows are provided to allow the second fluid in the second flow path to flow through the first flow path. A fluid mixer that supplies and distributes to the first fluid in the channel, and is disposed in the first channel in a state of being dispersed in the first channel width direction that is a direction away from the second channel. And a plurality of supply paths for guiding the second fluid to the plurality of supply ports independently from the second flow path, in the direction in which the first fluid flows in the first flow path. A plate-like body disposed along the plate-like body, wherein the plurality of supply paths are formed in the plate-like body, and the plurality of supply ports are formed on a plate surface of the plate-like body.
[0019]
[Action]
Since the plurality of supply ports are dispersed in the first flow path width direction, the second fluid is excellent in the first flow path width direction by supplying the second fluid from each of the plurality of supply ports. Can be dispersed.
In addition, in order to guide the second fluid from the second flow path to the plurality of supply ports, a plurality of supply paths for guiding the second fluid to the plurality of supply ports are provided independently from the second flow path. Compared to the conventional case in which the second fluid in the second flow path is collectively guided to the plurality of supply ports by one supply path, the pressure loss is reduced while the fuel gas is uniformly supplied from the plurality of supply ports. be able to.
Furthermore, a plurality of supply paths are formed in the plate-like body disposed in the first flow path along the flow direction of the first fluid, and a plurality of supply ports are formed on the plate surface of the plate-like body. Therefore, since the plate-like body forming the supply path and the supply port is along the flow direction of the first fluid, the flow of the first fluid is reduced for this purpose while providing a plurality of supply paths and supply ports. There is little inhibition.
In addition, since a plurality of supply paths and supply ports are formed in the plate-like body and unitized, handling such as assembly is easy.
In addition, a supply port is formed on the plate surface of the plate-like body, and the second fluid is sucked from the supply port to the first flow path by the high-speed first fluid flowing along the plate surface. Since the suction force acts, the supply of the second fluid from the supply port into the first flow path is facilitated.
[0020]
〔effect〕
Therefore, since the second fluid can be dispersed well, the pressure loss can be reduced while ensuring good mixing of the first fluid and the second fluid.
Furthermore , the second fluid can be distributed and supplied to the first fluid in a state in which the flow performance of the first fluid in the first flow path is favorably maintained, and while providing a plurality of supply paths and supply ports, In addition to excellent handling and storage, the pressure loss can be further reduced.
[0021]
The features / actions / effects of the fluid mixer of the present invention according to claim 5 are as follows.
[0022]
〔Characteristic〕
In the fluid mixer according to the fourth aspect of the present invention, the plurality of supply ports are opened in the same direction.
[0023]
[Action]
Since the plurality of supply ports are opened in the same direction and the flow direction of the second fluid supplied from the supply ports into the first flow path is made the same, for example, the second fluid is supplied in various directions from each supply port. Compared to the supply, the second fluid is easily dispersed in the first flow path.
[0024]
〔effect〕
Therefore, it has become possible to exhibit excellent dispersibility by synergy between the fact that the second fluid can be dispersed by arranging a plurality of supply ports in a distributed manner and that the second fluid can be uniformly dispersed with the supply from the supply ports. .
[0025]
The features / actions / effects of the burner device according to the sixth aspect of the present invention are as follows.
[0026]
〔Characteristic〕
An inner cylinder defining a second flow path, an intermediate cylinder defining a third flow path surrounding the inner cylinder, an outer cylinder defining a first flow path surrounding the intermediate cylinder, and the first An air supply means for supplying air to the flow path and the third flow path, a first gas supply means for supplying fuel gas to the second flow path, and a fuel gas to the third flow path The second gas supply means is provided, and a plurality of fluid mixers according to any one of claims 1 to 5 are distributed in the circumferential direction.
[0027]
[Action]
Air is supplied to the first flow path by the air supply means, and the fuel gas in the second flow path is supplied via the fluid mixer, thereby generating a mixture of air and fuel gas. When this mixture is ignited, the mixture is ignited and the mixture is burned. On the other hand, air is supplied to the third flow path by the air supply means, and fuel gas is supplied by the second gas supply means, thereby generating a mixture of air and fuel gas. When it is ignited, it ignites and the air-fuel mixture burns.
Since a plurality of fluid mixers that supply fuel gas into the first flow path in a state of being dispersed in the first flow path radial direction (first flow path width direction) are distributed in the circumferential direction, the first Even in the circumferential direction in the flow path, the fuel gas is distributed and supplied to improve the mixing property of the air and the fuel gas in the first flow path, whereby the air-fuel mixture can be made uniform. This can stabilize lean combustion when the air ratio is increased to achieve low NOx by lean combustion.
[0028]
〔effect〕
Accordingly, it is possible to reduce the pressure loss accompanying the fuel gas supply while maintaining the low NOx performance.
[0029]
The features / actions / effects of the burner device according to the seventh aspect of the present invention are as follows.
[0030]
〔Characteristic〕
In the burner device according to the sixth aspect of the present invention, a swirler that provides a swirling force to the air-fuel mixture is disposed at a downstream side of the fluid mixer in the first flow path. It is in a certain point.
[0031]
[Action]
Since a swirler is arranged at a downstream side of the fluid mixer in the first flow path so as to apply a swirling force to the mixture of air and fuel gas, combustion stability is achieved by swirling the mixture. Can be increased.
[0032]
〔effect〕
Accordingly, the lean flammability can be improved.
[0033]
The features / actions / effects of the burner device according to the eighth aspect of the present invention are as follows.
[0034]
〔Characteristic〕
In the burner device of the present invention according to claim 6 or 7, the fluid mixer according to claim 5 is provided as the fluid mixer, and the plate-like body of the fluid mixer is disposed on the plate surface of the first flow path. The swirler fins that are arranged in a posture along the spiral direction and impart a turning force to the air supplied to the first flow path are configured from the plate-like body.
[0035]
[Action]
A swirler is provided to impart a swirling force to the air supplied to the first flow path to improve the stability of combustion, thereby improving the lean combustibility. The fuel gas in the second flow path is Paying attention to the fact that the fluid mixer for distributing and supplying in one flow path includes a plate-like body that forms a supply port and a supply path, the posture in which the plate-like body follows the spiral direction of the first flow path Since the fins of the swirler are configured by this plate-like body by arranging them, it is possible to share the members between the fluid mixer and the swirler.
In addition, the supply port is formed in the plate surface of the plate-like body, and the suction force for sucking the fuel gas into the first flow path is supplied to the supply port by the ejector by the air flowing along the plate surface. Therefore, the supply of fuel gas from the supply port into the first flow path is facilitated.
[0036]
〔effect〕
Therefore, the structure can be simplified and the cost can be reduced while the combustion stability is excellent, and the pressure loss can be further reduced.
[0037]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1 and 2, the burner device used in a gas turbine engine, an incinerator, or the like includes an inner cylinder 1 that defines a second flow path A2, and a third flow path A3 that surrounds the inner cylinder 1. An intermediate cylinder 2 that defines the first cylinder A1, an outer cylinder 3 that defines the first flow path A1 that surrounds the intermediate cylinder 2, and an air supply for supplying air to the first flow path A1 and the third flow path A3 Means, first gas supply means for supplying fuel gas to the second flow path A2, second gas supply means for supplying fuel gas to the third flow path A3, and the second flow path Fluid mixing means for supplying and supplying the fuel gas in A2 to the air in the first flow path A1 is provided.
[0038]
The inner cylinder 1, the intermediate cylinder 2, and the outer cylinder 3 are arranged concentrically.
[0039]
The air supply means is means for pushing air into the first flow path A1 and the third flow path A3 from one end opening by a compressor (not shown).
[0040]
The first gas supply means is means for supplying fuel gas from a gas supply source (not shown) that stores fuel gas to the second flow path A2 via a conduit (not shown).
[0041]
The second gas supply means is provided with a nozzle 5 having a plurality of jet nozzles 4 formed at appropriate intervals in the circumferential direction at an end of the inner cylinder 1 on the side inserted into the intermediate cylinder 2. , Means for supplying the fuel gas in the second flow path A2 from the jet outlet 4 into the third flow path A3.
[0042]
The fluid mixing means includes a plurality of fluid mixers that distribute and supply the fuel gas in the second flow path A2 to the air in the first flow path A1 between the first flow path A1 and the second flow path A2. 6 is provided in a state of being distributed in the circumferential direction.
[0043]
As shown in FIGS. 3 and 4, the fluid mixer 6 is provided with a plate-like body 7 along the air flow direction in the first flow path A <b> 1. A plurality of supply ports 8 that open in the same direction are formed in the end face located in one flow path A1 at appropriate intervals in the length direction of the end face, and the plurality of supplies are independently provided from the second flow path A2. A plurality of supply passages 9 for guiding the fuel gas to the port 8 are formed in the plate-like body 7.
[0044]
The end face of the plate-like body 7 is arranged in a posture that is closer to the second flow path A2 side toward the downstream side in the air flow direction. That is, the plurality of supply ports 8 are dispersedly arranged in the first channel width direction (radial direction), which is the direction away from the second channel A2.
[0045]
Therefore, when using this fluid mixing means, the plurality of fluid mixers 6 are distributed in the circumferential direction, and the plurality of supply ports 8 of each fluid mixer 6 are distributed in the first flow path width direction. Thus, the fuel gas can be distributed and supplied in the first flow path width direction and the circumferential direction in the first flow path A1.
[0046]
And the 1st swirler 10 which provides turning force to the air-fuel mixture of the said air and fuel gas is arrange | positioned in the site | part downstream from the fluid mixer 6 of said 1st flow path A1.
[0047]
In addition, a second swirler 11 that imparts a turning force to the air-fuel mixture that has flowed through the third flow path A3 is disposed at an intermediate portion in the flow direction of the third flow path A3. Has been.
[0048]
Further, near the downstream end of the intermediate cylinder 2, an air stage ring 12 that mixes and mixes a part of the air-fuel mixture flowing through the first flow path A 1 with the air-fuel mixture flowing through the third flow path A 3. Is arranged. In the figure, S is a strut that is dispersed in the circumferential direction and that supports the intermediate cylinder 2 on the outer cylinder 3.
[0049]
In the burner device configured as described above, the swirl force is applied by the second swirler 11 and, at the same time, the mixed gas mixture is ignited by an ignition device (not shown). The pilot combustion flame is transferred to the air-fuel mixture flowing through the first flow path A1, so that the air-fuel mixture ignites and burns, and main combustion occurs.
[0050]
[Another embodiment]
In the above embodiment, the fluid mixer 6 is modified as follows.
That is, as shown in FIGS. 5 to 8, instead of forming the supply port 8 on the end surface of the plate-like body 7, the fuel gas is ejected to one of the two plate surfaces in a direction perpendicular to the plate surface. A plurality of supply ports 8 are formed in a distributed manner in the first flow path width direction and the air flow direction, and each of the portions of the other plate surface facing each supply port 8 in the plate thickness direction also with respect to the plate surface A supply port 8 for ejecting fuel gas in a direction perpendicular to the second flow channel A2 is formed, and the second flow channel A2 is in proportion to the two supply ports 8 facing each other at the same distance from the second flow channel A2. A plurality of supply passages 9 for guiding the fuel gas to the plurality of supply ports 8 independently from each other are formed in the plate-like body 7. That is, even if there are a plurality of supply ports 8, the plurality of supply ports 8 that are the same distance from the second flow path A <b> 2 and are supplied with fuel gas from the common supply path 9 are defined as one supply port in the present invention. 8 is defined.
[0051]
And the swirler 13 which arrange | positions the several plate-shaped body 7 in the attitude | position which makes those plate | board surfaces follow the spiral direction of 1st flow path A1, and provides a turning force to the air supplied to 1st flow path A1. Of the fins 13a, every other one in the circumferential direction is configured from the plate-like body 7.
[0052]
【Example】
Incidentally, an experiment conducted by the inventor in order to confirm the effect of the present invention will be described below.
As the burner device of the present invention, two types of the first burner device having the structure shown in the above embodiment and the second burner device having the structure shown in the above-mentioned another embodiment are prepared. The burner apparatus described in the prior art was prepared.
The first burner device has a specification including eight fluid mixers 6 in which five supply ports 8 having a diameter of 1.4 mm are formed, and the second burner device has a supply port having a diameter of 1.0 mm. 8 (the diameter of the supply passage 9 is 2.0 mm) is of a specification including eight fluid mixers 6 in which 2 × 5 pieces are formed.
For each burner device, the ratings (Φ (equivalence ratio) = 0.35, main fuel flow rate 17.5 m 3 / h (standard state), pilot fuel flow rate 1.9 m 3 / h (standard state), TIT (combustor) An open-air combustion test was conducted at an outlet average temperature) = 1000 ° C.).
In the 1st burner apparatus, the result of NOx13ppm (oxygen 0% conversion) or less, combustion efficiency 99% or more, and fuel maximum pressure loss 32kPa was obtained.
In the second burner device, NOx was 10 ppm (oxygen 0% conversion) or less, combustion efficiency was 99% or more, and the maximum fuel pressure loss was 30 kPa.
In the conventional burner apparatus, results of NOx 13 ppm (oxygen 0% conversion) or less, combustion efficiency 99% or more, and maximum fuel pressure loss 294 kPa were obtained.
[Brief description of the drawings]
[Fig. 1] Vertical side view [Fig. 2] Transverse front view [Fig. 3] Vertical side view of the main part (fluid mixer) [Fig. 4] Perspective view of the main part (fluid mixer) [Fig. 5] Another embodiment FIG. 6 is a cross-sectional front view showing another embodiment. FIG. 7 is a longitudinal side view of a main part (fluid mixer) showing another embodiment. FIG. 8 is a main part (fluid) showing another embodiment. Cross-sectional front view of mixer) [Explanation of symbols]
A1 1st flow path A2 2nd flow path 1 Inner cylinder 2 Intermediate cylinder 3 Outer cylinder 6 Fluid mixer 8 Supply port 9 Supply path 10 Swirler 13 Swirler 13a Fin

Claims (8)

A first flow path through which the first fluid flows and a second flow path in parallel with the first flow path through which the second fluid flows are provided to allow the second fluid in the second flow path to flow through the first flow path. A fluid mixer that supplies and distributes to the first fluid in the channel, and is disposed in the first channel in a state of being dispersed in the first channel width direction that is a direction away from the second channel. And a plurality of supply passages for guiding the second fluid to the plurality of supply ports independently from the second flow path,
A plate-like body disposed in the first flow path along the direction in which the first fluid flows; the plurality of supply paths in the plate-like body; and the plurality of supply ports in the plate A fluid mixer formed on each end face of the body .   The fluid mixer according to claim 1, wherein the plurality of supply ports are opened in the same direction. 2. The fluid according to claim 1, wherein an end surface of the plate-like body in which the plurality of supply ports is formed is arranged in a posture closer to the second flow path side as a portion on the downstream side in the flow direction of the first fluid. Mixer. A first flow path through which the first fluid flows and a second flow path in parallel with the first flow path through which the second fluid flows are provided to allow the second fluid in the second flow path to flow through the first flow path. A fluid mixer that supplies and distributes to the first fluid in the channel, and is disposed in the first channel in a state of being dispersed in the first channel width direction that is a direction away from the second channel. And a plurality of supply passages for guiding the second fluid to the plurality of supply ports independently from the second flow path,
A plate-like body disposed in the first flow path along the direction in which the first fluid flows; the plurality of supply paths in the plate-like body; and the plurality of supply ports in the plate Fluid mixers respectively formed on the plate surface of the body. The fluid mixer according to claim 4, wherein the plurality of supply ports are opened in the same direction.   An inner cylinder defining a second flow path, an intermediate cylinder defining a third flow path surrounding the inner cylinder, an outer cylinder defining a first flow path surrounding the intermediate cylinder, and the first An air supply means for supplying air to the flow path and the third flow path, a first gas supply means for supplying fuel gas to the second flow path, and a fuel gas to the third flow path And a second gas supply means. A burner device in which a plurality of fluid mixers according to any one of claims 1 to 5 are distributed in the circumferential direction.   The burner device according to claim 6, wherein a swirler that applies a turning force to the air-fuel mixture of the air and the fuel gas is disposed in a portion of the first flow path downstream of the fluid mixer.   The fluid mixer according to claim 5 is provided as the fluid mixer, and the plate-like bodies of the fluid mixer are arranged in such a posture that their plate surfaces are along the spiral direction of the first flow path, The burner device according to claim 6 or 7, wherein a fin of a swirler that imparts a turning force to the air supplied to the road is constituted by the plate-like body.

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