CN220624041U

CN220624041U - Combustion head of low-nitrogen combustor

Info

Publication number: CN220624041U
Application number: CN202322372541.4U
Authority: CN
Inventors: 赵康; 万剑峰
Original assignee: Zhejiang Siteli Heat Energy Equipment Manufacturing Co ltd
Current assignee: Zhejiang Siteli Heat Energy Equipment Manufacturing Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-03-19
Anticipated expiration: 2033-08-31

Abstract

The utility model belongs to the technical field of combustors, in particular to a combustion head of a low-nitrogen combustor, which comprises a shell, a gas channel and a water collecting cavity, wherein the gas channel and the water collecting cavity are arranged on the shell, a plurality of water cooling pipes communicated with the water collecting cavity are distributed at the rear end of the gas channel side by side, corrugated plate groups are arranged between two adjacent water cooling pipes, each corrugated plate group comprises a plurality of corrugated plates which are arranged in a stacking way and have a corrugated structure, and a matched vent hole for passing mixed gas is formed between all or part of two adjacent corrugated plates, and between the outermost corrugated plate and the water cooling pipe or the shell through the corrugated structure. The utility model has simple integral structure, low process requirement and low cost, and the corrugated plate has the advantages that the corrugated structure forms the matched vent holes with smaller pore diameter and larger distribution density, so that tempering is not easy to occur, and meanwhile, the passing mixed gas can be relatively uniform, so that the flame combustion temperature is uniform, and the generation amount of oxynitride is smaller.

Description

Combustion head of low-nitrogen combustor

Technical field:

the utility model belongs to the technical field of combustors, and particularly relates to a combustion head of a low-nitrogen combustor.

The background technology is as follows:

along with the establishment of the standards of related gas fuel combustion appliances at home and abroad and the implementation of nitrogen oxide control measures by government environmental protection departments, how to effectively reduce nitrogen emission becomes the research and development key direction of gas fuel combustion. Wherein, the higher the oxygen concentration in the combustion environment, the higher the temperature and the more uneven the temperature, the larger the nitrogen oxide generation amount.

Therefore, the existing combustion head is often provided with structures such as a water cooling pipe, a water cooling fin and the like at the combustion port so as to reduce the combustion temperature of flame and further reduce the generation amount of nitrogen oxides; for example, a full-premixing low-nitrogen burner with water-cooling finned tube fire row is disclosed in Chinese patent (issued publication number: CN 206973551U), and comprises an air inlet, a mixing channel and a mixing cavity which are mutually communicated, wherein one side of the mixing channel is provided with a fuel gas inlet, the fuel gas inlet is communicated with the mixing channel through a gas-homogenizing small hole, a gas-homogenizing pore plate is arranged in the mixing cavity, the water-cooling finned tube fire row is arranged on the gas-homogenizing pore plate, water collecting chambers are arranged at two ends of the water-cooling finned tube fire row, and the water collecting chambers are communicated with the water-cooling finned tube fire row. However, because the gas-equalizing pores on the gas-equalizing pore plate are directly processed, the pore diameter of the gas-equalizing pores cannot be too small due to the limitation of a processing technology, the corresponding distribution density is not large, the mixed gas is uneven, the combustion temperature is not uniform enough, the generation amount of nitrogen oxides is not ideal, and tempering is easy to cause.

The utility model comprises the following steps:

the utility model aims to provide a combustion head of a low-nitrogen combustor, which forms a matched vent hole with smaller pore diameter and larger distribution density by means of the matching clearance of a corrugated plate corrugated structure, so that the passing mixed gas is uniform, the flame combustion temperature is uniform, and backfire is not easy to occur.

The utility model is realized in the following way:

the utility model provides a combustion head of low nitrogen combustor, including the casing, and establish gas passageway and the water collection chamber on the casing, gas passageway's rear end distributes a plurality of side by side and water-cooling tube of water collection chamber intercommunication, adjacent two be equipped with the buckled plate group between the water-cooling tube, every buckled plate group all is formed with the cooperation air vent that supplies the gas mixture to pass through including a plurality of range upon range of setting and have corrugated structure between all or between the two partly adjacent buckled plates to and between the outside buckled plate and water-cooling tube or the casing.

In the combustion head of the low-nitrogen combustor, the corrugated structure comprises a plurality of corrugated recesses which are inwards recessed and are arranged along the width direction of the corrugated plate, and the corrugated recesses are distributed at intervals along the length direction of the corrugated plate.

In the combustion head of the low-nitrogen combustor, the cross section of the corrugated concave is arc-shaped, rectangular, trapezoid, V-shaped or U-shaped.

In the combustion head of the low-nitrogen combustor, a limiting abutting block is arranged between two adjacent water cooling pipes at the rear side of the corrugated plate group, and the limiting abutting block can limit the front and rear positions of the corrugated plate group relative to the water cooling pipes.

In the above-mentioned burner head of the low-nitrogen burner, two opposite side walls of two adjacent water-cooled tubes are arranged in parallel.

In the combustion head of the low-nitrogen combustor, the shell and the water collecting cavity are of annular structures, the inner ring of the shell is the fuel gas channel, the middle of the water collecting cavity is divided left and right through the partition plate to form a water inlet cavity and a water outlet cavity, a water inlet port communicated with the water inlet cavity and a water outlet port communicated with the water outlet cavity are formed in the shell, and two ends of the water cooling pipe are respectively communicated with the water inlet cavity and the water outlet cavity.

In the above-mentioned low nitrogen burner's combustion head, be located in the gas passageway of water-cooled tube and buckled plate group front side is equipped with the spoiler, is equipped with the vortex hole that supplies the gas mixture to pass through on the spoiler.

In the above-mentioned low nitrogen burner's combustion head, there is certain clearance between the outer wall of spoiler and the inner wall of gas passageway, and the back wall of spoiler is equipped with the spliced pole, and the spliced pole has seted up the spliced eye along its axial, is equipped with the grafting round pin of inserting in the spliced eye on the wall of some water-cooled tubes.

In the above-mentioned low nitrogen burner's combustion head, be equipped with a plurality of vortex hole group on the spoiler, each vortex hole group comprises a plurality of rows of equidistant distributed vortex holes along the length direction of buckled plate group, and adjacent two rows of vortex holes staggered arrangement in same vortex hole group.

Compared with the prior art, the utility model has the outstanding advantages that:

the utility model has simple integral structure, low process requirement and low cost, and the corrugated plate has the advantages that the corrugated structure forms the matched vent holes with smaller pore diameter and larger distribution density, so that tempering is not easy to occur, and meanwhile, the passing mixed gas can be relatively uniform, so that the flame combustion temperature is uniform, and the generation amount of oxynitride is smaller.

Description of the drawings:

FIG. 1 is an overall perspective view of an embodiment of the present utility model;

FIG. 2 is a diagram of the overall structure of a second embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an overall cross-sectional view I of an embodiment II of the present utility model;

FIG. 5 is a second overall cross-sectional view of a second embodiment of the present utility model;

FIG. 6 is a perspective view of a second embodiment of the present utility model;

fig. 7 is a partial enlarged view at B in fig. 6.

In the figure: 1. a housing; 2. a water collecting cavity; 3. a water-cooled tube; 4. a corrugated plate group; 5. corrugated plates; 6. matching with a vent hole; 7. the corrugation is concave; 8. limiting abutting blocks; 9. a partition plate; 10. a water inlet chamber; 11. a water outlet chamber; 12. a spoiler; 13. a disturbance orifice; 14. a connecting column; 15. and a plug pin.

The specific embodiment is as follows:

the utility model is further described below with reference to the specific examples, see fig. 1-7:

the utility model provides a combustion head of low nitrogen combustor, including casing 1, and establish gas passageway and water collection chamber 2 on casing 1, gas passageway's rear end distributes a plurality of side by side with water-cooled tube 3 of water collection chamber 2 intercommunication, adjacent two be equipped with buckled plate group 4 between the water-cooled tube 3, every buckled plate group 4 is including the corrugated plate 5 that a plurality of range upon range of setting and have the ripple structure, all or between the part adjacent two buckled plates 5 to and all be formed with the cooperation air vent 6 that supplies the gas mixture to pass through between the outside buckled plate 5 and water-cooled tube 3 or the casing 1 through the ripple structure. Wherein, the corrugated plate 5 range upon range of form in the buckled plate group 4 can be diversified, and six corrugated plate 5 range upon range of arrangements that have adopted in this embodiment, and from left to right is the corrugated plate 5 of forward setting in proper order, reverse and dislocation set's corrugated plate 5, forward and dislocation set's corrugated plate 5, reverse corrugated plate 5 of setting, forward set's corrugated plate 5, and reverse and dislocation set's corrugated plate 5. Of course, the specific number of corrugated sheets 5 and the lamination form may be determined according to actual requirements.

The utility model has simple integral structure, low process requirement and low cost, and the matching vent holes 6 with smaller pore diameter and larger distribution density are formed by the matching gaps of the corrugated structures of the corrugated plates 5, so that tempering is not easy to occur, and meanwhile, the passing mixed gas can be relatively uniform, so that the flame combustion temperature is uniform, and the generation amount of oxynitride is smaller.

Still further, the corrugated structure may be an outwardly protruding corrugated protrusion, and in this embodiment, the corrugated structure on the corrugated plate 5 is formed by inwardly recessing and corrugated recessing 7 along the width direction of the corrugated plate 5, and the corrugated recessing 7 is distributed by a plurality of along the length direction of the corrugated plate 5 at intervals.

Meanwhile, the cross section of the ripple dent 7 is arc-shaped, rectangular, trapezoid, V-shaped or U-shaped. I.e. the structure of the corrugation concave 7 forms an orifice structure matched with the vent hole 6, and the structure of the corrugation concave 7 with different cross sections can be selected according to actual requirements.

Still further, in order to be convenient for the assembly of buckled plate group 4, be located be equipped with spacing piece 8 that supports between two adjacent water-cooled tubes 3 of buckled plate group 4 rear side, this spacing piece 8 that supports can carry out spacingly to the front and back position of buckled plate group 4 relative water-cooled tubes 3. In addition, the front and back positions of the limiting supporting blocks 8 relative to the water cooling pipes 3 can be adjusted, so that the front and back positions of the corrugated plate groups 4 relative to the water cooling pipes 3 can be adjusted.

In order to enable the corrugated plate set 4 to be stably assembled between the two water-cooled tubes 3, two opposite side walls of two adjacent water-cooled tubes 3 are arranged in parallel.

The present application provides two embodiments, namely, the housing 1 shown in fig. 1 of the specification is a rectangular structure, and the housing 1 shown in fig. 2-7 of the specification is a circular structure, and in the two embodiments, the specific matching structures of the housing 1, the water collecting cavity 2 and the water cooling pipe 3 are as follows: the shell 1 and the water collecting cavity 2 are of annular structures, the inner ring of the shell 1 is the fuel gas channel, a water inlet chamber 10 and a water outlet chamber 11 are formed in the middle of the water collecting cavity 2 through left and right separation of a partition plate 9, a water inlet port communicated with the water inlet chamber 10 and a water outlet port communicated with the water outlet chamber 11 are formed in the shell 1, and two ends of the water cooling pipe 3 are respectively communicated with the water inlet chamber 10 and the water outlet chamber 11.

In order to further optimize the gas mixture in the gas channel can flow to the corrugated plate set 4 uniformly and flow out through the matched vent holes 6, a spoiler 12 is arranged in the gas channel positioned at the front side of the water cooling pipe 3 and the corrugated plate set 4, and a spoiler hole 13 for the gas mixture to pass through is arranged on the spoiler 12. Wherein, the spoiler 12 may be provided with a plurality of layers and arranged at intervals from front to back, and in this embodiment, the spoiler 12 is only provided with one, and the specific connection structure of the spoiler 12 disposed in the gas channel is as follows: a certain gap is reserved between the outer wall surface of the spoiler 12 and the inner wall surface of the gas channel, a connecting column 14 is arranged on the rear wall surface of the spoiler 12, a plug hole is formed in the connecting column 14 along the axial direction of the connecting column, and a plug pin 15 which is inserted into the plug hole is arranged on the wall surface of part of the water cooling pipe 3.

Furthermore, in order to make the gas mixture in the gas channel flow into each corrugated plate group 4 uniformly and effectively, the spoiler 12 is provided with a plurality of spoiler hole groups, each spoiler hole group is composed of a plurality of rows of spoiler holes 13 distributed at equal intervals along the length direction of the corrugated plate group 4, and two adjacent rows of spoiler holes 13 in the same spoiler hole group are staggered.

The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model, therefore: all equivalent changes in shape, structure and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a combustion head of low nitrogen combustor, is including casing (1), and establish gas passageway and water collection chamber (2) on casing (1), gas passageway's rear end distributes a plurality of side by side and water cooling pipe (3) of water collection chamber (2) intercommunication, its characterized in that: be equipped with buckled plate group (4) between two adjacent water-cooled tube (3), every buckled plate group (4) all are including a plurality of range upon range of setting and have corrugated plate (5) of ripple structure, all or between partial two adjacent buckled plate (5) and between the outside buckled plate (5) and water-cooled tube (3) or casing (1) all be formed with cooperation air vent (6) that supply the gas mixture to pass through ripple structure.

2. A burner head of a low nitrogen burner as claimed in claim 1, wherein: the corrugated structure comprises corrugated pits (7) which are inwards recessed and are arranged along the width direction of the corrugated plate (5), and the corrugated pits (7) are distributed at intervals along the length direction of the corrugated plate (5) by a plurality of corrugated plates.

3. A burner head of a low nitrogen burner as claimed in claim 2, wherein: the cross section of the ripple dent (7) is arc-shaped, rectangular, trapezoid, V-shaped or U-shaped.

4. A burner head of a low nitrogen burner as claimed in claim 1, wherein: be located between two adjacent water-cooled tubes (3) of buckled plate group (4) rear side is equipped with spacing piece (8) that support, and this spacing piece (8) that supports can carry out spacingly to the front and back position of buckled plate group (4) relative water-cooled tube (3).

5. A burner head of a low nitrogen burner as claimed in claim 1, wherein: the two opposite side walls of two adjacent water cooling pipes (3) are arranged in parallel.

6. A burner head of a low nitrogen burner as claimed in claim 1, wherein: the utility model discloses a gas-water cooling device, including casing (1) and water collection chamber (2), gas channel, casing (1) and water collection chamber (2) all are annular structure, and the inner ring of casing (1) is gas channel, the middle part of water collection chamber (2) is formed with inlet chamber (10) and outlet chamber (11) through baffle (9) left and right sides separation, is equipped with on casing (1) with inlet port, the outlet port with outlet chamber (11) intercommunication of inlet chamber (10), the both ends of water cooling pipe (3) are respectively with inlet chamber (10), outlet chamber (11) intercommunication.

7. A burner head of a low nitrogen burner as claimed in claim 1 or 6, wherein: a spoiler (12) is arranged in the gas channel at the front side of the water cooling pipe (3) and the corrugated plate group (4), and a spoiler hole (13) for the mixed gas to pass through is arranged on the spoiler (12).

8. A burner head of a low nitrogen burner as recited in claim 7, wherein: a certain gap is reserved between the outer wall surface of the spoiler (12) and the inner wall surface of the gas channel, a connecting column (14) is arranged on the rear wall surface of the spoiler (12), a plug hole is formed in the connecting column (14) along the axial direction of the connecting column, and a plug pin (15) inserted into the plug hole is arranged on the wall surface of part of the water cooling pipe (3).

9. A burner head of a low nitrogen burner as recited in claim 7, wherein: the spoiler (12) is provided with a plurality of spoiler hole groups, each spoiler hole group consists of a plurality of rows of spoiler holes (13) which are distributed at equal intervals along the length direction of the corrugated plate group (4), and two adjacent rows of spoiler holes (13) in the same spoiler hole group are arranged in a staggered manner.