JP2008241084A - Burner device and heating device comprising the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burner device and a heating device capable of reducing NOx and having superior combustion stability. <P>SOLUTION: A first inner cylinder and a second inner cylinder are concentrically formed in a combustion cylinder, circular primary air flow channel, gas flow channel and secondary air flow channel are defined from an inner side face of the combustion cylinder toward the center direction, and a rear plate provided with a plurality of cut portions in the circumferential direction at prescribed intervals on its peripheral edge is disposed in the first primary air flow channel formed between the combustion cylinder and the first inner cylinder, so that the primary air is jetted while divided through cut portions of the rear plate, and mixed with the gas to form divided flames. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a burner device and a heating device including the burner device, and more particularly to a burner device and a heating device that can suppress generation of NOx.

Conventionally, it is known that methods such as lowering the combustion temperature and shortening the gas residence time in a high temperature range are effective for reducing NOx generated in the combustion process.
And, as a so-called “low NOx type burner” capable of realizing these methods with a burner, for example, a rapid combustion type, a two-stage combustion type, a concentration combustion type, a flame division type (see, for example, Patent Document 1), Self-recirculation type and premixing type have been proposed.
JP 2004-144435 A

  Among the above-mentioned types, the flame division type is based on a method of dividing the flame into small flames to lower the combustion temperature. However, the configuration disclosed in Patent Document 1 is an air that provides a flame holding plate at the tip. A pipe is arranged, and on the outer periphery of the air pipe, a gas manifold, a premixed air manifold, and a secondary air manifold are arranged in this order, and a secondary air nozzle gas projects from the downstream portion of the secondary air manifold. The structure of the gas flow path and the air flow path is complicated, and it is difficult to manufacture at low cost. Similarly, each type has its advantages and disadvantages.

Further, in order to effectively reduce NOx, it is conceivable to combine known effective methods, but there has been no concrete implementation at low cost.
An object of the present invention is to provide a burner apparatus that can form a divided flame with a relatively simple structure and can effectively reduce NOx.

  (1) In the present invention, the first inner cylinder and the second inner cylinder are formed concentrically in the combustion cylinder, and the annular primary air flow path and the gas flow from the inner surface to the center direction of the combustion cylinder. A passage and a secondary air flow path are defined, and a plurality of notches are formed around the primary air flow path formed between the combustion cylinder and the first inner cylinder with a predetermined interval around the periphery. A burner apparatus capable of forming a divided flame is provided by disposing a rear plate formed in a direction and dividing and ejecting primary air through a notch portion of the rear plate and mixing with the gas.

  (2) In the above (1), the present invention forms a plurality of primary gas ejection holes for radially ejecting a primary gas radially into the combustion cylinder in the middle of the first inner cylinder. A gas is mixed with the primary air.

  (3) According to the present invention, in the above (2), a front plate is disposed at the end of the secondary air flow path to restrict the secondary air ejection direction to a direction perpendicular to the primary air ejection direction. In addition, a plurality of secondary gas ejection holes for ejecting the secondary gas radially are formed at positions ahead of the tip of the combustion cylinder in the first inner cylinder, and the divided flame is spread radially to form a thin film. It can be formed into a shape.

  (4) The present invention is characterized in that, in the above (3), the ratio of the primary air to the secondary air is 7: 3 to 5: 5.

  (5) In the present invention, the first inner cylinder and the second inner cylinder are formed concentrically in the combustion cylinder, and the annular primary air flow path and the gas flow from the inner surface of the combustion cylinder to the center direction. A passage and a secondary air flow path are defined, and a plurality of notches are formed around the primary air flow path formed between the combustion cylinder and the first inner cylinder with a predetermined interval around the periphery. A rear plate formed in a direction is disposed, and primary air is divided and ejected through a notch portion of the rear plate, while primary gas is directed into the combustion cylinder in the middle of the first inner cylinder. A plurality of primary gas ejection holes to be ejected radially are formed, the primary gas and the primary air are mixed to form a divided flame, and at the end of the secondary air flow path, the 2 A front plate for restricting the direction of secondary air ejection to a direction perpendicular to the direction of primary air ejection; In the first inner cylinder, a plurality of secondary gas ejection holes for ejecting the secondary gas radially are formed at positions ahead of the end of the combustion cylinder, and the divided flames are radially spread to form a thin film. Possible burner device.

  (6) The present invention is a heating device including the burner device according to any one of the above (1) to (5), and a water pipe filled with the heat transfer water in a can housing the heat transfer water. Forming a combustion chamber in which a group is erected, disposing the burner device on one side of the can body so as to face the combustion chamber, and disposing a flue communicating with the combustion chamber on the other side; The water pipe group includes a first water pipe group in which a plurality of water pipes are arranged in a row at a position facing the burner device, and a second water pipe group in which a plurality of water pipes are densely arranged at a position facing the smoke pipe. The first water pipe group is connected to each other by baffle fins to form a combustion chamber baffle having a lower opening, while the combustion port of the burner device is disposed at the upper part of the combustion chamber, After the flame of the apparatus once collides with the combustion chamber baffle, the lower opening of the combustion chamber baffle It flows towards al the second water tube group, and the heating of the heat transfer water through the water tube group.

  According to the present invention, a split flame can be formed with a simple structure, and NOx can be effectively reduced by lowering the flame temperature. Similarly, it is possible to effectively combine methods effective for NOx reduction with a simple configuration, and more effective NOx reduction can be realized.

  According to the present invention, a first inner cylinder and a second inner cylinder are formed concentrically in a combustion cylinder, and an annular primary air flow path, a gas flow path, and 2 are formed from the inner surface of the combustion cylinder toward the center. A secondary air flow path is defined, and a plurality of notches are formed in the circumferential direction at predetermined intervals on the periphery of the primary air flow path formed between the combustion cylinder and the first inner cylinder. A burner device capable of forming a divided flame is provided by disposing the rear plate, dividing the primary air through the notch portion of the rear plate, and mixing it with gas.

  That is, by providing a rear plate having a plurality of notches formed in the circumferential direction with a predetermined interval around the periphery, by dividing and ejecting primary air through the notches of the rear plate and mixing with the gas, A split flame, which is a small flame, can be easily formed, and since the flame temperature can be lowered because it is a small split flame, the generation of NOx can be effectively suppressed.

  Further, in the configuration described above, a plurality of primary gas injection holes are formed in the middle of the first inner cylinder, and primary gas is ejected radially into the combustion cylinder, and the primary gas and the primary air are formed. Are preferably mixed.

  That is, since the primary gas is jetted into the combustion cylinder, flame holding can be achieved and stable combustion performance can be obtained, so that it is possible to maintain the desired flammability while dividing into small flames.

  In addition, a front plate is disposed at the end of the secondary air flow path to restrict the secondary air ejection direction to a direction perpendicular to the primary air ejection direction, and the combustion in the first inner cylinder A plurality of secondary gas ejection holes for ejecting the secondary gas radially can be formed at positions ahead of the tip of the cylinder, and the divided flame can be spread radially to form a thin film.

  According to such a configuration, since a so-called thin film flame is formed in which the divided flame is greatly spread in the outward direction, the flame temperature can be further effectively reduced, and thus the suppression of NOx generation is more effective. Can be planned.

By the way, the ratio of the primary air and the secondary air may be 7: 3 to 5: 5. This is because combustion stability decreases when the amount of primary air is larger than 7: 3, and formation of a divided flame becomes difficult when the amount of primary air is smaller than 5: 5. .
Further, all the configurations described above are combined, the first inner cylinder and the second inner cylinder are formed concentrically in the combustion cylinder, and an annular primary air flow path is formed from the inner surface of the combustion cylinder toward the center. And a gas flow path and a secondary air flow path, and a plurality of notches are provided in the primary air flow path formed between the combustion cylinder and the first inner cylinder at predetermined intervals on the periphery. A rear plate having a portion formed in the circumferential direction is provided, and primary air is divided and ejected through a notch in the rear plate, while the first inner cylinder is halfway toward the combustion cylinder. A plurality of primary gas ejection holes for ejecting a secondary gas radially are formed, the primary gas and the primary air are mixed to form a divided flame, and at the end of the secondary air flow path , Front for restricting the direction of secondary air ejection to a direction perpendicular to the direction of primary air ejection A plurality of secondary gas injection holes for radiating secondary gas radially at a position ahead of the end of the combustion cylinder in the first inner cylinder, and radiating the divided flame radially; It is possible to make a burner device that can be formed into a thin film by spreading the film.

  According to such a configuration, by combining the technologies for reducing NOx, it is possible to reduce NOx more effectively, and because it is not structurally complicated, there is no cost demerit.

  Furthermore, by using a thin-film flame that spreads radially, the flame can be shortened, and the amount of time that the combustion gas stays in the high-temperature region is reduced accordingly. Since the flame immediately comes into contact with the wall of the combustion chamber, the heat transfer efficiency is improved and the temperature of the flame that has been deprived of heat can further reduce NOx.

And in order to achieve NOx reduction, it is more effective to devise not only the burner device but also the heating device itself provided with the burner device. Therefore, a heating device having the following configuration can be provided.
This is because a combustion chamber in which a water tube group filled with the heat transfer water is erected is formed in the can containing the heat transfer water, and the side of the can has the structure described above so as to face the combustion chamber. A burner device, that is, at least a primary air flow path, is provided with a rear plate having a plurality of notches formed in the circumferential direction at predetermined intervals on the periphery, and primary air is passed through the notches of the rear plate. While the burner device that can be ejected in a divided manner is disposed, a flue communicating with the combustion chamber is disposed on the other side, and the heating medium water can be heated by the burner via the water pipe It is a device.
At this time, the water pipe group is a first water pipe group in which a plurality of water pipes are arranged in a row at a position facing the burner device, and a second water pipe group in which a plurality of water pipes are densely arranged at a position facing the smoke pipe. The water pipes of the first water pipe group are connected by baffle fins to form a combustion chamber baffle with a lower opening, while the combustion port of the burner device is arranged at the upper part of the combustion chamber, The flame of the burner device is once collided with the combustion chamber baffle and then flows into the second water pipe group from the lower opening of the combustion chamber baffle. According to such a heating device, NOx can be greatly reduced, which can contribute to environmental improvement.

  With the above configuration, the flame of the burner device with reduced NOx is once collided with a baffle fin formed by baffle fins connecting the water pipes of the first water pipe group, and then the baffle fins By letting it flow into the second water tube group from the lower opening, it takes a combustion form that draws an S shape on the flame, first let the flame touch the first water tube group, lower the flame temperature, By realizing the reverse combustion in which the combustion is performed again in the vicinity of the combustion port of the burner device, the generation of NOx can be largely suppressed, and the low oxygen combustion can be performed. Further, since the combustion chamber can be reduced in size, the entire heating device can be reduced in size.

The baffle fin is preferably formed in a substantially V shape in a cross-sectional view.
That is, by making the baffle fins substantially V-shaped instead of linear in a cross-sectional view, it is possible to remove the thermal stress, and the baffle fins are previously installed in the combustion chamber after being attached to the water pipe by welding or the like. This makes it very easy to manufacture the combustion chamber baffle.

Moreover, it is good to provide the recombustion space for recombusting unburned gas between the said 1st water pipe group and the said 2nd water pipe group.
That is, the flame from the burner flows into the second water tube group from the lower opening of the combustion chamber baffle so as to draw a substantially S shape in the combustion chamber, but unburned gas may be generated by any means, and such unburned gas is It is possible to suppress the generation of CO by reburning in this space.

Furthermore, each water pipe of the second water pipe group may have a shape having a throttle part at the upper and lower ends.
That is, when connecting the upper and lower ends of each water pipe to be arranged closely, for example, to the top and bottom plates, the gap between the water pipes in the combustion chamber can be narrowed by narrowing the upper and lower ends of each water pipe. It becomes possible to arrange more water pipes per area. Therefore, it is possible to arrange a large number of water pipes with a more compact configuration. In addition, when densely arranging the water pipes of the second water pipe group, the water pipes may be arranged in multiple rows in a staggered manner, for example.

  As described above, a heating apparatus that significantly suppresses the generation of NOx can be realized by the burner apparatus that can at least divide the flame and reduce NOx and the structure of the combustion chamber described above.

Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings. In the present embodiment, a heating device including a burner device will be described as a hot water generator.
FIG. 1 is an explanatory view of a hot water generator according to the present embodiment in a longitudinal sectional view, FIG. 2 is an explanatory view of the hot water generator in a partial plan sectional view, and FIG. 3 is a partially cutaway side view of the hot water generator. 4 is a partial cross-sectional view of the burner device according to the present embodiment, FIG. 5 is a front view of the burner device, FIG. 6 is an explanatory view of the rear plate, and FIG. 7 is an end view taken along the line II of FIG. 8 is an end view taken along the line II-II in FIG. 4, and FIG. 9 is an explanatory view of the front plate.

  As shown in FIGS. 1 to 3, the hot water generator includes a box-shaped can body 1 that stores heat transfer water, a combustion chamber 3 that is formed inside the can body 1, and a vertical installation in the combustion chamber 3. The first water pipe group 4 and the second water pipe group 5 that are made, the burner device 6 attached to one side surface of the can body 1 so as to face the combustion chamber 3, and the other side surface of the can body 1 It has a flue 7 communicating with the combustion chamber 3, and heats the heat transfer water filling the first water tube group 4 and the second water tube group 5 with the flame and combustion gas from the burner device 6 to form a can It is possible to generate hot water in 1.

  The burner device 6 according to the present embodiment is composed of a burner body 60 having a combustion port 61 provided at the front end of the combustion chamber 3 of the hot water generator, and a blower 62 that blows air to the burner body 60. Yes. 67 is a motor of the blower 62.

The burner body 60 is disposed so as to be positioned at least above the intermediate position in the height direction in the combustion chamber 3 of the hot water generator, and as shown in FIG. A combustion cylinder 64 is connected to the front surface of the box 63.
In the burner main body 60, a base end portion 10a protruding from a connecting tube 66 communicating with the gas supply pipe 65 is positioned in the wind box 63, and a tip end portion 10b is located more than the combustion tube 64. A gas flow path forming cylinder 10 protruding forward is provided.

  The gas flow path forming cylinder 10 includes a first inner cylinder 11 and a second inner cylinder 12 that are concentrically formed, and an annular shape is formed between the gas flow path forming cylinder 10 and the combustion cylinder 64. A primary air flow path A1 is formed, a secondary air flow path A2 is formed inside the second inner cylinder 12, and further, the gas supply is provided between the first inner cylinder 11 and the second inner cylinder 12. An annular gas flow path G communicating with the pipe 65 is formed. Further, the gas flow path forming cylinder 10 has a secondary air introduction port 13 communicating with the secondary air flow path A2 at the base end surface and a secondary air jet port 14 formed at the distal end surface. In FIGS. 4 and 5, reference numeral 68 denotes a pilot gas supply pipe for seed fire.

  Therefore, the air sent from the blower 62 passes through the primary air flow path A1 formed between the combustion cylinder 64 and the first inner cylinder 11 from the wind box 63, and the first air The secondary air is divided into secondary air passing through the secondary air flow path A2 formed inside the inner cylinder 12. Further, as shown in FIG. 4, a front plate 15 shown in FIG. 9 is attached so as to close the secondary air jet port 14, and the ejection direction of the secondary air is changed in the radial direction of the gas flow path forming cylinder 10. Is changed to a substantially right angle. As shown in FIG. 9, the front plate 15 has a configuration in which four connecting pieces 15 b are attached at equal intervals on the periphery of a disk 15 a that is substantially the same shape as the secondary air outlet 14.

Further, a rear plate 16 is fitted on the circumferential surface of the first inner cylinder 11 so as to close the primary air flow path A1 at a position slightly inside the front end edge of the combustion cylinder 64.
As shown in FIG. 6, the rear plate 16 is a donut-shaped plate body in which a fitting hole 16b for fitting with the gas flow path forming cylinder 10 is formed at the center. A plurality of notches 16a are formed in the circumferential direction. Therefore, the primary air flowing through the primary air flow path A1 is divided and ejected through the plurality of cutout portions 16a.

Further, as shown in FIGS. 4 and 7, the primary gas is radiated radially into the combustion cylinder 64 in the middle of the first inner cylinder 11 and at a position near the tip edge inside the combustion cylinder 64. A plurality of primary gas ejection holes 17 are formed for ejection.
From each primary gas ejection hole 17, the primary gas is ejected and mixed with each other so as to correspond to the primary air that divides and flows out from the rear plate 16, and as a result, a divided flame can be formed. It has become.

In addition, a plurality of secondary gases that radially eject secondary gas at a predetermined interval from the primary gas ejection hole 17 so as to be positioned ahead of the tip of the combustion cylinder 64 in the first inner cylinder 11. The ejection hole 18 is formed.
Due to the radial ejection of the secondary gas, the divided flame can be radially spread to form a thin film.

  As described above, according to the burner device 6 according to this embodiment, the flame temperature is low and the divided flame contributing to the reduction of the generation of NOx is greatly expanded in the outward direction to form a so-called thin film flame. Since the flame can be shortened and the gas residence time in the high temperature range is shortened, the generation of NOx can be more effectively suppressed.

  Next, a hot water generator provided with such a burner device 6 will be described in detail with reference to the drawings. 10 is a cross-sectional plan view of a combustion chamber provided in the hot water generator, FIG. 11 is a cross-sectional view taken along line II of FIG. 10, and FIG. 12 is a cross-sectional view taken along line II-II of FIG.

  As shown in FIGS. 1 to 3, a heat exchanger 21 for exchanging heat by steam generated from heated heat transfer water is disposed inside the can body 1 which is an upper position of the combustion port 61 of the burner body 60. A feed water inlet / outlet port 22 including a water feed port 22a to which cold water is fed and a water feed port 22b to send hot water is formed on one side surface. When this hot water generator is used, the space in which the heat exchanger 21 is disposed is maintained in a substantially vacuum state.

The first water pipe group 4 erected in the combustion chamber 3 so as to face the combustion port 61 of the burner main body 60 has a predetermined distance so as to face the burner device 6 as shown in FIGS. (For example, if the dimension of the combustion chamber 3 is 500 to 600 mm (width) × 1000 to 1600 mm (length), the combustion chamber 3 is spaced from the combustion port 61 of the burner device 6 by 500 to 800 mm) and the width of the combustion chamber 3 A plurality of (six in this case) first water pipes 40 are erected in a row in the direction, and the adjacent first water pipes 40 are connected by baffle fins 41, whereby a combustion chamber baffle 42 having a lower opening is formed. Is forming.
That is, the combustion chamber baffle 42 is composed of a plurality of first water pipes 40 and a plurality of baffle fins 41, and as shown in FIGS. 1, 3, and 11, with respect to the height dimension of the first water pipe 40. By connecting the upper part 2/3 between the adjacent first water pipes 40 and 40 in advance by welding with a baffle fin 41 having a length of about 2/3, a comb-like opening 43 is formed below. The formed combustion chamber baffle 42 is formed.

  Therefore, as shown in FIG. 1, the flame injected in the horizontal direction from the combustion port 61 once collides with the combustion chamber baffle 42, moves backward, and then descends as if to draw an S-shape. It will flow into the 2nd water pipe group 5 side from the opening part 43 (the combustion form by such a flame may be called "S character combustion" hereafter).

  As described above, the flame from the burner body 60 is once collided with the combustion chamber baffle 42 to cause the first water pipe 40 to absorb the heat, thereby drastically lowering the flame temperature and reversing the flame to burn the combustion port 61 of the burner body 60. By burning again in the vicinity, low oxygen combustion and NOx generation can be remarkably suppressed.

Moreover, in this embodiment, as shown in FIG. 2, the baffle fin 41 is formed in the cross-sectional view substantially V shape.
That is, by making the baffle fin 41 substantially V-shaped in a cross-sectional view, it is possible to remove the thermal stress, and it is possible to weld the first water pipe 40 with high accuracy, and the combustion chamber baffle 42 is manufactured. It becomes extremely easy and the resistance to flame is improved.

  Further, when the combustion chamber baffle 42 is provided in the box-shaped combustion chamber 3, the combustion chamber baffle 42 can be separately manufactured in advance. Therefore, when the heating device is manufactured by retrofitting it, Assemblability is also improved.

  Note that the diameter of the first water pipe 40 is determined in consideration of the required area of the opening 43 formed in the lower portion of the combustion chamber baffle 42 and the amount of heat absorption necessary for lowering the flame temperature.

Further, in the present embodiment, the baffle fin 41 that is substantially V-shaped in cross-sectional view has an obtuse V-shaped angle, and the V-shaped sharpened portion faces the second water pipe group 5 side so as to be adjacent. 1 It welds between the water pipes 40 and 40.
The obtuse angle prevents the distance between the V-shaped sharp part and the first water pipe 40 from becoming long, prevents the V-shaped sharp part from excessively rising in temperature, and maintains the desired resistance. It is to do. In addition, the material for forming the baffle fin 41 can be saved rather than making the V-shaped shape an acute angle.
Further, in the present embodiment, the V-shaped sharpened portion is directed to the second water tube group 5 side, so that a predetermined distance is ensured between the burner body 60 and the combustion chamber baffle 42 to maintain good combustion performance. However, the can 1 can be made compact.

  On the other hand, the second water pipe group 5 is disposed so as to face the flue 7 provided on the side opposite to the burner device 6, and as shown in FIGS. 2 and 10, the plurality of second water pipes 50. Are erected in a state of being densely packed in a zigzag manner with a predetermined interval between the second water pipes 50.

  Therefore, the combustion gas entering from the opening 43 formed in the lower portion of the combustion chamber baffle 42 heats the heat transfer water in the pipe while passing through the second water pipes 50 while going up, via the flue 7. Discharged outside the device.

  Thus, the heat transfer water is efficiently heated by the first water tube group 4 and the second water tube group 5 and stored as hot water in the can 1.

  By the way, as shown in FIG.2 and FIG.10, between the 1st water pipe group 4 and the 2nd water pipe group 5, the recombustion space 8 for recombusting unburned gas is provided. That is, the front end row of the second water tube group 5 (the first water tube group 4 side is the front side) is separated from the first water tube group 4 arranged in a row by a distance D of about 100 to 300 mm. I am letting.

  The flame injected from the burner body 60 burns in an S shape by the combustion chamber baffle 42 and flows into the second water pipe group 5 from the comb-shaped opening 43 formed below the combustion chamber baffle 42. There is a case where unburned gas is inevitably generated, and the generation of CO is suppressed by reburning the unburned gas in the reburning space 8.

  Further, as shown in FIG. 12, the second water tube group 5 forms a throttle portion 51 at the upper and lower ends of each second water tube 50.

  That is, the second water pipe 50 is welded and attached to the ceiling plate 30 and the bottom plate 31 of the combustion chamber 3 with the end portions penetrating, but in the case of welding, a predetermined amount is provided between the second water pipes 50. Gap is required. On the other hand, in the combustion chamber 3, in order to improve heating efficiency, arrangement | positioning of many 2nd water pipes 50 is requested | required. Therefore, by making the upper and lower ends of the second water pipe 50 into a throttle structure, the gap between the second water pipes 50 in the combustion chamber 3 is narrowed, and the second water pipe 50 is joined at the joint portion of the ceiling plate 30 and the bottom plate 31. Since a predetermined gap can be formed between each other, more second water pipes 50 can be disposed per unit area in the combustion chamber 3, and a high-powered heating device can be provided while being compact. It becomes possible to provide.

  From the embodiments described above, the following burner device and heating device can be provided.

  In the combustion cylinder 64, the first inner cylinder 11 and the second inner cylinder 12 are formed concentrically, and an annular primary air flow path A1 and a gas flow path G are formed from the inner surface of the combustion cylinder 64 toward the center. And the secondary air flow path A2, and the primary air flow path A1 formed between the combustion cylinder 64 and the first inner cylinder 11 has a plurality of notches at predetermined intervals on the periphery. A split flame can be formed by disposing a rear plate 16 having a portion 16a formed in the circumferential direction and dividing and ejecting primary air through the notch 16a of the rear plate 16 and mixing it with gas. Burner device.

  A plurality of primary gas ejection holes 17 are formed in the middle of the first inner cylinder 11 to eject primary gas radially into the combustion cylinder 64, and the primary gas and the primary air are mixed. Burner device.

  At the end of the secondary air flow path A2, a front plate 15 for restricting the secondary air ejection direction to a direction perpendicular to the primary air ejection direction is disposed, and the first inner cylinder 11 includes the front plate 15. A burner device in which a plurality of secondary gas ejection holes 18 for radially ejecting secondary gas are formed at positions ahead of the tip of the combustion cylinder 64, and the divided flames can be radially spread to form a thin film. .

  A burner apparatus in which the ratio of the primary air and the secondary air is 7: 3 to 5: 5.

  In the combustion cylinder 64, the first inner cylinder 11 and the second inner cylinder 12 are formed concentrically, and an annular primary air flow path A1 and a gas flow path G are formed from the inner surface of the combustion cylinder 64 toward the center. And a secondary air flow path A2, and a plurality of notches are formed at predetermined intervals on the periphery of the primary air flow path A1 formed between the combustion cylinder 64 and the first inner cylinder. A rear plate 16 having a circumferential direction 16a is disposed, and primary air is divided and ejected through a notch 16a of the rear plate 16, while the first inner cylinder is in the middle of the combustion cylinder. A plurality of primary gas ejection holes 17 for radially ejecting the primary gas toward the surface are formed, the primary gas and the primary air are mixed to form a divided flame, and the secondary air flow At the end of the path A2, the secondary air ejection direction is perpendicular to the primary air ejection direction. And a plurality of secondary gas ejection holes 18 for radially ejecting secondary gas radially from the end of the combustion cylinder 64 in the first inner cylinder 11. A burner device that can be formed and formed into a thin film by radially spreading the divided flames.

  A combustion chamber 3 in which a water tube group filled with the heat transfer water is erected is formed in a can body 1 containing heat transfer water, and the burner is placed on one side of the can body 1 so as to face the combustion chamber 3. While the apparatus 6 is disposed, a flue 7 communicating with the combustion chamber 3 is disposed on the other side, and the heat transfer water can be heated by the burner apparatus 6 through the water pipe group ( For example, in the hot water generator, a plurality of water pipes are arranged at a position facing the burner device 6, a first water pipe group 4 in which a plurality of water pipes are arranged in a row and a position facing the flue 7. The water pipe is composed of a second water pipe group 5 in which water pipes are closely arranged, and each water pipe (for example, the first water pipe 40) of the first water pipe group 4 is connected to each other by a baffle fin 41 (for example, an opening portion). 43), while the combustion port 61 of the burner device 6 is connected to the combustion chamber 3 It arrange | positions at upper part (for example, refer FIG. 1), and after making the flame of the said burner apparatus 6 collide with the said combustion chamber baffle 42 once, it is said 2nd from the downward opening (for example, opening part 43) of the said combustion chamber baffle 42. A heating device (for example, a hot water generator) that is allowed to flow into the water pipe group 5.

It is explanatory drawing by the longitudinal cross-sectional view of the warm water generator which concerns on this embodiment. It is explanatory drawing by the partial plane sectional view of the same warm water generator. It is a partially cutaway side view of the hot water generator. It is explanatory drawing by the partial cross section view of the burner apparatus which concerns on this embodiment. ← Step shift It is a front view of the burner device. It is explanatory drawing by the front view of a rear plate. FIG. 5 is an end view taken along line II in FIG. 4. It is an end elevation in the II-II line of FIG. It is explanatory drawing of a front plate. It is a plane sectional view of a combustion chamber provided in the warm water generator. It is sectional drawing in the II line | wire of FIG. It is sectional drawing in the II-II line of FIG.

Explanation of symbols

A1 1st air flow path A2 2nd air flow path G Gas flow path 1 Can body 3 Combustion chamber 4 1st water pipe group 5 2nd water pipe group 6 Burner apparatus 7 Flue 11 First inner cylinder 12 2nd inner cylinder DESCRIPTION OF SYMBOLS 15 Front plate 16 Rear plate 16a Notch part 17 1st gas ejection hole 18 2nd gas ejection hole 40 1st water pipe 41 Baffle fin 43 Opening part 50 2nd water pipe 60 Burner main body 61 Combustion port 64 Combustion cylinder

Claims (6)

  A first inner cylinder and a second inner cylinder are formed concentrically in the combustion cylinder, and an annular primary air flow path, gas flow path, and secondary air flow path are formed from the inner surface of the combustion cylinder toward the center. A rear plate in which a plurality of notches are formed in the circumferential direction at predetermined intervals on the periphery of the primary air flow path formed between the combustion cylinder and the first inner cylinder. A burner apparatus characterized in that a divided flame can be formed by disposing and ejecting primary air through a notch in the rear plate and mixing it with gas.   A plurality of primary gas ejection holes are formed in the middle of the first inner cylinder to radially eject the primary gas toward the combustion cylinder, and the primary gas and the primary air are mixed. The burner device according to claim 1.   A front plate is disposed at the end of the secondary air flow path to restrict the direction of secondary air ejection to a direction perpendicular to the direction of primary air ejection, and the combustion cylinder of the first inner cylinder A plurality of secondary gas ejection holes for radially ejecting secondary gas are formed at positions ahead of the tip, and the divided flames can be radially formed to form a thin film. 2. The burner device according to 2.   The burner apparatus according to claim 3, wherein a ratio of the primary air to the secondary air is set to 7: 3 to 5: 5.   A first inner cylinder and a second inner cylinder are formed concentrically in the combustion cylinder, and an annular primary air flow path, gas flow path, and secondary air flow path are formed from the inner surface of the combustion cylinder toward the center. A rear plate in which a plurality of notches are formed in the circumferential direction at predetermined intervals on the periphery of the primary air flow path formed between the combustion cylinder and the first inner cylinder. A plurality of ones that divide and eject primary air through the notch portion of the rear plate, and eject primary gas radially into the combustion cylinder in the middle of the first inner cylinder. A secondary gas ejection hole is formed, the primary gas and the primary air are mixed to form a divided flame, and the secondary air ejection direction is set at the end of the secondary air flow path. A front plate for restricting in a direction perpendicular to the primary air ejection direction is disposed, and the first inner cylinder is provided with the front plate. A plurality of secondary gas ejection holes for radially ejecting secondary gas at a position ahead of the end of the combustion cylinder in which the divided flames are radially spread to form a thin film. Characteristic burner device. A heating device comprising the burner device according to any one of claims 1 to 5,
A combustion chamber in which a water tube group filled with the heat transfer water is erected is formed in the can containing the heat transfer water, and the burner device is disposed on one side of the can so as to face the combustion chamber. On the other hand, a flue communicating with the combustion chamber is arranged on the other side,
The water tube group,
A first water pipe group in which a plurality of water pipes are arranged in a row at a position facing the burner device, and a second water pipe group in which a plurality of water pipes are densely arranged at a position facing the smoke pipe,
The water tubes of the first water tube group are connected to each other by baffle fins to form a combustion chamber baffle having a lower opening, while the combustion port of the burner device is disposed above the combustion chamber, and the flame of the burner device Is caused to flow into the second water pipe group from a lower opening of the combustion chamber baffle, and the heat transfer water is heated through the water pipe group.

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