JP4036605B2 - Concentration burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a flat rich mixing portion formed on one end side corresponding to the downstream side in the flow direction of the rich mixture, and the lean mixture flame port in the flow direction of the pale mixture. The flat light mixing part formed in the one end side corresponded in the downstream in is related with the density | concentration combustion apparatus by which the thickness direction is arranged in parallel by turns.
[0002]
[Prior art]
The above-described lean combustion apparatus performs lean combustion in the light mixing section, and mixes and burns a relatively large amount of air to the fuel gas as a whole, thereby generating NOx that is nitrogen oxides. It is configured so that stable combustion can be performed by burning the light mixture discharged from the light mixture flame outlet while holding the flame by the rich flame generated in the gas mixture flame mouth It is what you are doing.
[0003]
  In such a light and dark combustion apparatus, for example, FIG.9And figure10As shown in the figure, the light mixing section 33 has a rectifying plate 31 that rectifies the light mixture discharged from the light mixture outlet 34, and has a wave shape and a thick mixture in the discharge direction of the light mixture. A plurality of sheets are provided along the juxtaposed direction in a state that extends over the entire width of the flame port longitudinal width along the flame port longitudinal direction orthogonal to the juxtaposed direction of the portion 32 and the light mixing unit 33. In order to generate a vortex flow in the flame mixture 34 for flow by flow, a vortex flow forming member U wider than the rectifying plate 31 of a corrugated plate is provided (for example, JP 2000-39112 A). .
[0004]
The eddy current forming member U will be described. The plate-like first eddy current forming member 35 which is linear in the discharge direction of the light mixture and extends over the entire width of the flame port length along the flame port length direction. And a second eddy current forming member 36 that is formed in a substantially triangular shape when viewed in the discharge direction of the light air-fuel mixture is provided as the eddy current forming member U.
The first vortex forming member 35 is formed wider than the thickness of the wave-shaped rectifying plate 31 as viewed in the discharge direction of the light mixture, and both end portions in the juxtaposed direction in the light mixture flame port 34 The second vortex forming member 36 is provided at a plurality of locations along the longitudinal direction of the flame mouth as viewed in the discharge direction of the light mixture, and as shown in FIG. A vortex is actively generated in the first vortex forming member 35 and the second vortex forming member 36, and the first vortex forming member 35 and the second vortex forming member 36 are positioned in the fresh mixture flame port 34 by the generation of the vortex. A high temperature effect is applied to raise the temperature of the spot to suppress the lift phenomenon of the light flame.
[0005]
In short, the above-described concentration combustion apparatus provides a vortex forming member to actively generate a vortex to suppress the lift phenomenon of the light flame, and to provide a rectifying plate so that the light mixture is lightly mixed. The rectification is performed so that the gas mixture is dispersed and discharged over the entire gas outlet, thereby improving the combustion state of the light mixture in the light mixture flame outlet.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional lean combustion apparatus, the second eddy current forming member is partially provided in the flame port longitudinal width along the flame port longitudinal direction as viewed in the discharge direction of the light mixture. The high-temperature action caused by the vortex generated in the second vortex forming member is difficult to act over the entire width of the flame port longitudinal width along the flame port longitudinal direction, and the first vortex flow forming member is disposed in the discharge direction of the light mixture. Since it is provided only at both ends and the intermediate portion in the juxtaposed direction in the light mixture flame opening, the high-temperature action due to the vortex generated in the first vortex forming member is It becomes difficult to make it act over the full width of the flame-mouth short width along the flame-mouth short direction of the same direction.
As a result, there is a possibility that it is difficult to suppress the lift phenomenon over the whole light mixture flame outlet.
[0007]
  Further, in the above-described conventional lean combustion apparatus, a plurality of rectifying plates having a wave shape are provided along the juxtaposed direction as viewed in the discharge direction of the light mixture, so that the opening area of the light mixture flame opening is increased. In order to make it almost uniform, the adjacent rectifying plates in the juxtaposed direction are manufactured by matching the relative positions of the adjacent rectifying plates in the longitudinal direction of the flame throat so that the corrugated peaks and valleys are in contact with each other. It must be done and its production becomes difficult.
  That is, for example, figure11As shown in (b) and (b), when the relative position of the adjacent flow straightening plates in the juxtaposed direction is shifted in the longitudinal direction of the flame outlet, a portion having a large opening area and a portion having a small opening area can be formed. Since the amount of the light mixture discharged from the gas flame outlet cannot be made almost uniform and the combustion state at the light mixture flame mouth may be deteriorated, as described above, it is adjacent to the juxtaposed direction.RIt is necessary to manufacture the matching current plate in the longitudinal direction of the flame outlet exactly, which makes it difficult to manufacture.
[0008]
The present invention has been made paying attention to such a point, and its purpose is to facilitate the production of a configuration for making the opening area of the light mixture substantially uniform, while facilitating the production of the light discharged from the light mixture flame opening. The object of the present invention is to provide a concentration combustion apparatus capable of accurately suppressing the lift phenomenon of the air-fuel mixture and improving the combustion state.
[0009]
[Means for Solving the Problems]
  In order to achieve this object, according to the first aspect of the present invention, a flat rich mixing portion in which the rich mixture flame opening is formed on one end side corresponding to the downstream side in the flow direction of the rich mixture. And a flat light mixing portion formed on one end side corresponding to the downstream side in the flow direction of the light mixture are alternately arranged in parallel with the thickness direction as the parallel direction. In the light and dark combustion device
  A rectifying plate for rectifying the light mixture discharged from the light mixture outlet into the light mixture portion is a flame port longitudinal direction orthogonal to the juxtaposed direction as viewed in the discharge direction of the light mixture It is provided in a state that spans the entire width of the flame outlet longitudinal width along
  The rectifying plate has a wave shape and a plurality of corrugated plate bodies extending over the entire width of the flame port longitudinal width along the flame port longitudinal direction as viewed in the discharge direction of the light mixture, and has a straight shape and A plurality of flat plates extending over the entire width of the flame port longitudinal direction along the flame port longitudinal direction are provided in a state of being alternately positioned along the parallel arrangement direction,
  Of the plurality of flat plates, in the juxtaposed direction, substantially in the flame outlet for the light mixtureIn the centerThe specific flat plate positioned is configured to have a width along the parallel arrangement direction larger than that of the other flat plate.And the length along the discharge direction of the light mixture is configured to be longer than the other flat plate and the corrugated plate,
In the light mixture flow path portion leading to the light mixture flame outlet in the light mixture portion, the longitudinal direction of the light mixture flame mouth is in a posture along a direction orthogonal to the discharge direction of the light mixture A plurality of flat plate-like distribution plates having a plurality of holes formed along the discharge direction of the light mixture, and provided adjacent to the discharge direction of the light mixture The hole forming position in one distribution plate body and the hole forming position in the other distribution plate body are different from each other when viewed in the discharge direction of the light mixture.ing.
[0010]
That is, the rectifying plate for rectifying the light mixture is a plurality of corrugated plate bodies that have a wave shape in the discharge direction of the light mixture and span the full width of the flame port longitudinal width along the flame port longitudinal direction. And a plurality of flat plates that are linear and span the entire width of the flame port longitudinal width along the flame port longitudinal direction, and are provided in a state of being alternately positioned along the juxtaposed direction. Even when the relative position of the rectifying plates adjacent to each other in the juxtaposed direction is shifted in the longitudinal direction of the flame port in the discharge direction of the air-fuel mixture, by contacting the flat plate that exhibits a linear shape with the corrugated plate that exhibits a wave shape, It is possible to make the opening area of the light mixture flame opening almost uniform, and the light mixture can be rectified so as to be dispersed and discharged over the whole light mixture flame opening. It will be possible.
[0011]
  The rectifying plate is provided in a state in which a plurality of corrugated plate bodies and a plurality of flat plate bodies are alternately positioned along the juxtaposed direction as viewed from the discharge direction of the light mixture. Of the flat bodies, the middle of the flame outlet for light mixture in the juxtaposed directionIn the centerSince the specific flat plate positioned is configured to have a width along the parallel arrangement direction larger than that of the other flat plate, the eddy current is positively generated by the specific flat plate. As a result, the high temperature action that raises the location of the specific flat plate in the flame outlet for light mixture mainly acts, and also in other flat plates other than the specific flat plate, the portion that becomes negative pressure by the flat plate Therefore, the negative pressure causes a high temperature action to raise the temperature of the place where the other flat plate body other than the specific flat plate body is located in the flame outlet for light mixture.
  Accordingly, in the direction along the longitudinal direction of the flame mouth, the high temperature action due to the vortex generated in the specific flat body and the high temperature action due to the negative pressure in the flat body cause the high temperature action over the entire width of the flame mouth longitudinal width. In addition, in the juxtaposed direction, a flame in the same direction as the juxtaposed direction is produced by a high-temperature action caused by a vortex flow in a specific flat plate body, and in addition, a high-temperature action caused by a negative pressure in a flat plate body adjacent to the specific flat plate body. High temperature action is performed over the entire width of the flame mouth short width along the short-mouth direction, and high temperature action can be performed over the whole light mixture flame mouth.
  That is, it is possible to suppress the lift phenomenon by applying a high temperature action to the whole light mixture flame outlet.
[0012]
In addition, since the specific flat plate is configured so that the width along the juxtaposed direction is larger than the other flat plates, the heat capacity of the specific flat plate is increased, and the light mixture in the corrugated plate is increased. The heat at the downstream end in the discharge direction of the gas can be conducted through a specific flat plate body to the upstream side in the discharge direction of the light mixture to cool, that is, the quenching effect can be applied, For example, in low-load combustion in which a small amount of a light mixture is discharged from a light mixture flame outlet, the light flame is mixed with a light mixture. It is possible to prevent the occurrence of so-called backfire that flows backward upstream of the air outlet in the discharge direction of the light mixture, and it is possible to improve the combustion state in the light mixture flame outlet.
[0013]
  By the way, among the plurality of flat plates, in the juxtaposed direction, almost the middle of the light mixture flame outlet.In the centerSince the specific flat plate located is configured to have a width along the parallel arrangement direction larger than that of the other flat plate, for example, in order to cause a high temperature action over the whole light mixture flame outlet, Compared to the structure in which all of the flat bodies are configured to have a relatively large width along the juxtaposed direction, the entire area of the light mixture flame outlet is increased while increasing the opening area of the light mixture flame opening. It is possible to act at a high temperature, and it is possible to improve the combustion state of the light mixture even in high load combustion in which a large amount of the light mixture is discharged from the light mixture flame outlet.
[0014]
  In summary, according to the first aspect of the present invention, it is possible to easily produce a configuration for making the opening area of the light mixture substantially uniform, and to produce a light mixture that is discharged from the light mixture flame opening. Thus, it has been possible to provide a concentration combustion apparatus that can accurately suppress the lift phenomenon and improve the combustion state.
In addition, the light mixture is formed in a flat plate-like distribution plate body arranged in a plurality along the discharge direction of the light mixture in a posture along a direction orthogonal to the discharge direction of the light mixture. In the distribution plate adjacent to the discharge direction of the light mixture, the hole formation position in the one distribution plate and the other distribution Since the positions where the holes are formed in the plate body are different from each other when viewed in the discharge direction of the light mixture, the light mixture is passed each time the holes formed in the distribution plate are passed through. The flow direction of the gas mixture is changed, the flow velocity of the light mixture discharged from the flame outlet for the light mixture is reduced, the lift phenomenon of the light mixture can be suppressed, and the mixture of the light mixture is mixed. Promotion is possible.
[0015]
According to invention of Claim 2, it is comprised so that the width along the said juxtaposition direction in the said specific flat plate body may become the same width as the width in the said juxtaposition direction in the said corrugated plate body, or substantially the same width. Has been.
[0016]
That is, increasing the width of the specific flat plate along the juxtaposed direction can increase the area of the portion where the light mixture does not discharge in the flame outlet for the light mixture, and accurately generate a vortex. However, conversely, if the area where the air-fuel mixture does not discharge is made too large in the flame outlet for a light air-fuel mixture, a large eddy current will be generated in a specific flat plate and affected by that eddy current. Thus, in the parallel arrangement direction, it is difficult to make the lift suppression effect of the light air mixture discharged from the light mixture flame outlet uniform. Therefore, the width of the specific flat plate along the parallel direction is accurately determined. It is desirable to make it large.
According to invention of Claim 2, it is comprised so that the width along the said juxtaposition direction in a specific flat plate body may become the same width as the width in the said juxtaposition direction in an adjacent corrugated plate body, or substantially the same width. By doing so, the width along the parallel arrangement direction in a specific flat plate is generated, and a vortex is accurately generated, and in the parallel arrangement direction, the amount of the light mixture discharged from the flame mixture for light mixture is made uniform The width of the air-fuel mixture discharged from the air-fuel mixture flame outlet in the juxtaposed direction can be made uniform while accurately generating a vortex. Will be able to.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a light and dark combustion apparatus according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, this concentration combustion apparatus includes a burner case 1, a rectangular box-like frame frame 2 that is internally provided in the burner case 1, and the like, and a thick mixture made of a plurality of flat sheet metals. Concentration burner 3 as a portion and light burners 4 as a plurality of flat sheet metal light mixing portions are alternately arranged side by side in the thickness direction and accommodated in box-shaped frame 2 Has been. A thickening burner 3 is disposed at both ends in the juxtaposed direction.
A fan 5 for supplying combustion air is provided below the burner case 1, and an air chamber whose discharge port is formed between the bottom of the burner case 1 and the bottom of the box-shaped frame 2. 6 is communicated.
[0020]
As shown in FIG. 6, the concentration burner 3 is formed by bending a series of plate materials, and is used for injecting and burning a concentrated mixture having a small air mixing ratio. A rich gas mixture flame mouth 7 composed of a slit-like flame hole 7a is formed.
A rich mixture flow path 8 communicating with the rich mixture flame port 7 is provided in a state of bulging on both sides in the width direction of the rich burner 3, and is an end opposite to the rich mixture flame port 7. The part is provided with a thickening inlet 9 for introducing fuel gas and combustion air.
[0021]
As shown in FIG. 7, the light burner 4 is for injecting and burning a light air-fuel mixture having a large air mixing ratio, and on the upper surface side thereof, a light air-fuel flame comprising an elongated rectangular opening. A mouth 10 is formed. A light mixture flow passage 11 as a portion of the light mixture flow passage communicating with the light mixture flame opening 10 is provided in a state of bulging out on both sides in the width direction of the light burner 4, and the light mixture flame is provided. A light introduction port 12 for introducing fuel gas and combustion air is provided at the end opposite to the port 10.
[0022]
The light mixture flow path 11 includes a bent flow path 11a that bends in an inverted state on the other lateral side opposite to the light introduction port 12 when the concentration burner 3 and the light burner 4 are arranged in parallel. And the flow direction of the fuel gas and the combustion air introduced from the light introduction port 12 by the bending action of the bent flow path 11a is reversed and flows toward the light mixture flame port 10. It is configured as follows.
In addition, the flow of the light mixture is regulated in the flow passage portion from the bent flow passage 11a to the light mixture flame outlet 10 in the light mixture flow passage 11, as shown in FIG. A flat plate-shaped through-hole formation body 16 for uniformizing the amount of the light mixture flowing toward the flame inlet 10 over the whole flame mixture 10, and the length of the flame mixture 10 for the pale mixture A flat plate-like distribution plate body 18 in which a large number of holes 17 are formed along the direction is provided.
[0023]
As shown in FIG. 8 (C), the flow hole forming body 16 is formed of a flat plate-like plate body, regulates the flow of the light mixture and allows the flow of the light mixture. And the width D of the flow hole forming body 16 is configured to be substantially the same as the width of the light mixture flow path 11.
The through holes 16a of the through hole forming body 16 are continuously opened from one side end portion in the longitudinal direction toward the other side end portion, and the opening width is formed in three stages. ing.
The through-hole forming body 16 having such a configuration has the large opening width D1 side to the light introduction port 12 side and the small opening width D3 in the parallel arrangement direction of the dark burner 3 and the light burner 4. It is attached to the light burner 4 with its side positioned on the opposite side of the light introduction port 12.
[0024]
Incidentally, the flow hole 16a of the flow hole forming body 16 is formed so that the opening width thereof is large opening width D1: medium opening width D2: small opening width D3 = 4: 2: 1, and Total length T in the longitudinal direction of the flow hole forming body 16: Length T1 in the longitudinal direction with a large opening width D1: Length T2 in the longitudinal direction with an opening width T2 in the middle direction D2: Small opening width D3 in the longitudinal direction The length in the longitudinal direction is T3 = 10: 4.5: 3: 2.5.
[0025]
The distribution plate 18 is provided in a line along the discharge direction of the light mixture in a posture along a direction orthogonal to the discharge direction of the light mixture, and is disposed on the downstream side in the discharge direction of the light mixture. Forming positions of a large number of holes 17a formed in the first distribution plate body 18a and forming positions of a large number of holes 17b formed in the second distribution plate body 18b disposed on the upstream side. It is configured so as to be in a different position as viewed in the discharge direction of the light mixture.
[0026]
Specifically, as shown in FIG. 8A, for example, a hole 17a having a diameter of 3 mm is formed in the first distribution plate body 18a in the longitudinal direction of the light mixture flame outlet 10 as shown in FIG. The second distribution plate 18b is formed with holes 17b having a diameter of 3 mm, for example, in the second distribution plate 18b, as shown in FIG. It is formed so that it may become two rows along the longitudinal direction of the flame mouth 10, and the formation position of the hole 17a of the 1st distribution plate body 18a and the formation position of the hole 17b of the 2nd distribution plate body 18b are light mixture. When viewed in the discharge direction, the positions are different.
[0027]
In this way, the flow direction of the fuel gas and the combustion air introduced from the light inlet 12 is changed by the flow hole forming body 16 by the bending action of the bent flow passage 11a in the light mixture flow passage 11. By reversing and flowing through the flow hole 16 a of the flow hole forming body 16, the amount of the light mixture flowing toward the light mixture flame port 10 is the whole of the light mixture flame port 10. It is made uniform over.
Furthermore, after the fresh air-fuel mixture that has passed through the through holes 16a of the through hole forming body 16 passes through the holes 17b formed in the second distribution plate 18b, the flow direction thereof is changed to change the first distribution. By passing through the holes 17a formed in the plate 18a, the flow rate of the light mixture is reduced and the mixing of the light mixture is promoted.
[0028]
As described above, the amount of the fuel gas introduced from the light introduction port 12 and the combustion air is lightly mixed with the amount of the light mixture flowing toward the light mixture flame port 10 by the through-hole forming body 16. Further, the second distribution plate 18b and the first distribution plate 18a reduce the flow rate of the light mixture and promote the mixing of the light mixture. After that, it is discharged from the flame opening 10 for the light mixture, and it becomes possible to suppress the lift phenomenon of the light flame and to promote the mixing of the light mixture discharged from the flame opening 10 for the light mixture. .
[0029]
As shown in FIGS. 3 to 5, the light mixing unit 4 has a flow straightening plate 13 for rectifying the light mixture discharged from the light mixture outlet 10, as viewed in the discharge direction of the light mixture. In addition, it is provided in a state over the entire width of the flame port longitudinal width along the flame port longitudinal direction perpendicular to the juxtaposed direction.
The rectifying plate 13 has a wave shape as viewed in the discharge direction of the light mixture and a plurality of corrugated plate bodies 15 extending over the entire width of the flame port longitudinal width along the flame port longitudinal direction, and has a linear shape and flame. A plurality of flat plate bodies 14 extending over the entire width of the flame mouth longitudinal width along the longitudinal direction of the mouth are provided in a state where they are alternately positioned along the parallel arrangement direction. The specific flat plate 14a located substantially in the center of the light mixture flame mouth 10 in the direction is configured to have a width along the parallel arrangement direction larger than that of the other flat plate 14b.
Specifically, the width along the juxtaposed direction in the specific flat plate body 14a is the same width (or substantially the same width) as the width along the juxtaposed direction of the dark burner 3 and the light burner 4 in the corrugated plate body 15. ).
Incidentally, the lengths of the flat plate body 14 and the corrugated plate body 15 are formed to be about 20 times the width of the light mixture flame outlet 10 so that the mixture of the light mixture can be promoted accurately. It is configured.
[0030]
When adding a description, by providing a plurality of corrugated plates 15 and a plurality of flat plates 14 in a state of being alternately positioned along the parallel arrangement direction, in the discharge direction view of the light mixture, Even if the relative positions of the adjacent flat plate 14 and the corrugated plate 15 in the juxtaposed direction are shifted in the longitudinal direction of the flame outlet, the flat plate 14 having a linear shape is brought into contact with the corrugated plate 15 having a wave shape, The opening area in the light mixture flame opening 10 is manufactured to be substantially uniform, and the light mixture is rectified so as to be dispersed and discharged over the whole light mixture flame opening 10. Yes.
[0031]
Then, the flow of the light mixture positively generates a vortex flow in the specific flat plate body 14a, and the vortex flow causes the portion where the specific flat plate body 14a is located at a high temperature in the light mixture flame outlet 10 to have a high temperature action. In the other flat plate 14b other than the specific flat plate 14a, there is a portion that becomes negative pressure due to the flat plate 14b, and the specific pressure in the flame mixture 10 for the light mixture is generated by the negative pressure. It is comprised so that the high temperature effect | action which makes the location in which the flat plate body 14b other than the flat plate body 14b positions may also be high temperature may act.
That is, the high temperature action caused by the vortex flow in the specific flat plate 14a due to the flow of the light mixture mainly suppresses the lift phenomenon of the light flame, and in addition to the high temperature action caused by the vortex flow, the high temperature due to the negative pressure in the other flat plate 14b. By acting, it is allowed to act at a high temperature over the entire width of the flaming longitudinal width along the flaming longitudinal direction orthogonal to the juxtaposed direction, and in the juxtaposed direction, the flared short in the same direction as the juxtaposed direction. High temperature action is performed over the entire width of the short width of the flame opening along the direction, and high temperature action is performed over the entire light mixture flame opening 10.
[0032]
In addition, as the width along the juxtaposed direction in the specific flat plate 14a is larger, the above-described high-temperature action can be more accurately acted, and the lift phenomenon of the light flame can be accurately suppressed. Actually, it is limited to several mm due to cost and downsizing of the apparatus.
[0033]
Further, as shown in FIG. 3, the specific flat plate 14 a is configured such that the length along the discharge direction of the light mixture is longer than the other flat plate 14 b and the corrugated plate 15. The heat transfer area of the specific flat plate 14a is increased, the heat capacity of the specific flat plate 14a is increased, and the heat of the corrugated plate 15 such as the downstream end in the discharge direction of the light mixture is specified by the specific flat plate. 14a can be conducted to the upstream side in the discharge direction of the light mixture to be cooled, that is, a quenching effect can be applied, and the local high-temperature portion such as the downstream end in the discharge direction of the light mixture in the corrugated plate 15 In low load combustion in which the temperature can be lowered and a small amount of the light mixture is discharged from the light mixture flame port 10, the light flame is more in the discharge direction of the light mixture than the light mixture flame port 10. Occurrence of so-called backfire that flows back upstream It is possible to prevent.
[0034]
Accordingly, since the lift phenomenon of the light flame can be suppressed over the entire light mixture flame mouth 10, for example, the ratio of the fuel gas between the thick burner 3 and the light burner 4 is set to be the rich burner: light. Even if the burner 4 for the light mixture is burned sufficiently lean and the flow velocity of the light mixture in the light burner 4 is increased, It is possible to accurately suppress the lift phenomenon.
Moreover, even in low-load combustion in which a small amount of fuel gas is burned, the occurrence of backfire can be suppressed, so that combustion is performed at the fuel gas ratio of the thick burner 3 and the light burner 4 as described above. However, stable combustion can be performed in high load combustion in which a large amount of fuel gas is combusted and low load combustion in which a small amount of fuel gas is combusted.
[0035]
The thickening inlet 9 provided in the thickening burner 3 and the thinning inlet 12 provided in the thin burner 4 are all arranged in parallel in the same direction. A gas header is configured such that the introduction port 9 is located above and the light introduction port 12 is located below. The gas header that distributes the concentrated fuel gas and the light fuel gas to the front surfaces of both the introduction ports 9 and 12. 19 is provided.
The gas header 19 is provided with a concentration gas nozzle 20 and a light gas nozzle 21, the concentration gas nozzle 20 faces each of the concentration introduction ports 9, and the light gas nozzle 21 faces each of the light introduction ports 12. Yes. That is, the same number of thickening gas nozzles 20 as the thickening burners 3 are provided, and the same number of light gas nozzles 21 as the lightening burners 4 are provided.
[0036]
The enrichment inlet 9 has a relatively small opening area, and a part of combustion air flowing from the air chamber 6 to the gas header 19 side is mainly determined by an ejector action mainly by blowing fuel gas from each enrichment gas nozzle 20. Are sucked at a ratio of 1 and introduced into each of the thickening inlets 9.
In this way, the fuel gas and the combustion air introduced from each of the rich inlets 9 are sufficiently mixed with each other while flowing through the bent rich mixture flow path 8, and the rich mixture after mixing is mixed. Is discharged from the rich gas mixture nozzle 7 and burned.
[0037]
Further, the light introduction port 12 has an opening area larger than that of the concentration introduction port 9, and the effect by the above-described ejector action cannot be obtained, and a part of the combustion air flowing from the air chamber 6 to the gas header 19 side is obtained. The pump 5 is configured to be pushed in at a predetermined rate mainly by the blowing pressure of the fan 5 and to be introduced into each light inlet 12.
That is, as shown in FIG. 2, air from the air chamber 6 is provided between the inner periphery of the burner case 1 and the outer periphery of the box-shaped frame 2 to cool the box-shaped frame 2 and the burner case 1. However, since the cross-sectional area of the gap is small, the air pressure in the air chamber 6 and the burner case 1 is increased, and most of the air in the air chamber 6 is light. It is configured to be introduced into the service inlet 12.
In this way, the fuel gas and the combustion air introduced from each of the light introduction ports 12 are sufficiently mixed with each other while flowing through the bent light mixture flow path 11, and the light mixture after mixing is mixed. Is discharged from the light mixture flame opening 10 and burned.
[0038]
Further, the gas header 19 is provided with an open / close valve and an adjustment valve for adjusting the amount of supplied gas in gas supply passages (not shown) for supplying fuel gas to the gas nozzle 20 for concentration and gas nozzle 21 for light, respectively. As described above, it can be adjusted in accordance with a desired heating amount.
[0040]
[Another embodiment]
(1In the above embodiment, the width along the juxtaposing direction of the thickening burner 3 and the light burner 4 in the specific flat plate body is the same width (or almost the same width) as the width along the juxtaposing direction in the corrugated plate body 15. However, it is possible to change the width of the specific flat plate along the juxtaposed direction as appropriate, which is larger than the other flat plate 14b. If it is.
[0041]
(2In the above embodiment, a flat plate-like shape in which a large number of holes 17 are formed in the flow passage portion from the flow passage forming body 16 to the light mixture flame opening 10 in the light mixture flow passage 11. The example in which two distribution plate bodies 18 are provided side by side along the discharge direction of the light mixture is shown, but the number of distribution plate bodies 18 is not limited to two, and may be three or more. In this case, in the distribution plate 18 adjacent to the discharge direction of the light mixture, the formation position of the holes 17 in one distribution plate 18 and the formation position of the holes 17 in the other distribution plate 18 are determined to discharge the light mixture. It is configured to be at different positions in the direction view.
  When the distribution plate 18 is provided, the shape of the holes 17 in the distribution plate 18 can be appropriately changed.
[0042]
(3In the above embodiment, the example in which the rectifying plate 13 is constituted by the three flat plates 14 and the four corrugated plates 15 is shown, but the number of the flat plates 14 and the corrugated plates 15 is changed as appropriate. Is possible.
  Moreover, in the said embodiment, it is comprised so that the rectification | straightening board 13 located in the both ends in the light mixture flame outlet 10 may become the corrugated plate body 15 in the juxtaposition direction of the dark burner 3 and the light burner 4. However, conversely, in the direction in which the thick burner 3 and the light burner 4 are juxtaposed, the flat bodies 14 are positioned at both ends of the light mixture flame outlet 10, or the thick burner 3 and the light burner 3 are used. In the juxtaposition direction with the burner 4, the flat plate body 14 may be positioned at one end portion of the light mixture flame outlet, and the corrugated plate body 15 may be positioned at the other end portion.
[0043]
That is, the rectifying plate 13 may be any plate as long as the flat plate bodies 14 and the corrugated plate bodies 15 are alternately arranged along the juxtaposed direction, and the number of the flat plate bodies 14 and the corrugated plate bodies 15 may be appropriately changed. Is possible.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a light and dark combustion apparatus.
[Fig. 2] Vertical side view of a light and dark combustion device
[Fig. 3] Longitudinal rear view of light and dark combustion device
FIG. 4 is a partial top view of the light and dark combustion apparatus.
FIG. 5 is a diagram showing a deep flame and a light flame
FIG. 6 is a perspective view of a thickening burner.
FIG. 7 is a partially cutaway perspective view of a light burner.
FIG. 8 is a top view of a distribution plate body and a through-hole formation body.
FIG. 9Partial top view of a conventional density burner
FIG. 10Diagram showing rich flame and light flame in the prior art
FIG. 11Explanatory drawing about composition of current plate in prior art
[Explanation of symbols]
3 Thick mixing part
4 Light mixing section
7 Flame outlet for rich mixture
10 Flaming mouth for light mixture
11 Light mixture flow path
13 Current plate
14 Plate
14a Specific flat plate
15 corrugated plate
17 Holes in the distribution plate
18 Distribution plate

Claims (2)

A flat rich mixing portion formed on one end side corresponding to the downstream side in the flow direction of the rich mixture, and a light mixture flame port on the downstream side in the flow direction of the light mixture And a flat light mixing portion formed on one end side corresponding to the concentration combustion device, wherein the thickness direction is the parallel arrangement direction, the concentration combustion apparatus is alternately arranged,
A rectifying plate for rectifying the light mixture discharged from the light mixture outlet to the light mixture section is a flame port longitudinal direction orthogonal to the juxtaposed direction as viewed in the discharge direction of the light mixture It is provided in a state over the entire width of the flame outlet longitudinal width along
The flow straightening plate has a wave shape and a plurality of corrugated plate bodies extending over the entire width of the flame port longitudinal width along the flame port longitudinal direction as viewed in the discharge direction of the light mixture, and exhibits a straight line shape and the A plurality of flat plates extending over the entire width of the flame mouth longitudinal width along the flame mouth longitudinal direction are provided in a state of being alternately positioned along the parallel arrangement direction,
Among the plurality of plate members, particular plate members located Chuo substantially the juxtaposed said in direction pale mixture for flame port, a width along the arrangement direction, than the other plate members It is comprised so that it may become large and the length along the discharge direction of the light air-fuel mixture may become longer than the other flat plate and the corrugated plate,
In the light mixture flow path portion leading to the light mixture flame outlet in the light mixture section, the longitudinal direction of the light mixture flame mouth is in a posture along a direction perpendicular to the discharge direction of the light mixture A plurality of flat plate-like distribution plate bodies having a plurality of holes formed along the discharge direction of the light mixture and provided adjacent to the discharge direction of the light mixture In this case, the concentration combustion apparatus is configured such that the hole formation position in one distribution plate body and the hole formation position in the other distribution plate body are different positions in the discharge direction of the light mixture .   2. The light / dark combustion according to claim 1, wherein a width along the juxtaposed direction in the specific flat plate body is configured to be the same or substantially the same as a width along the juxtaposed direction in the corrugated plate body. apparatus.

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