CN219063448U

CN219063448U - Combustor monolithic and have its combustor

Info

Publication number: CN219063448U
Application number: CN202120343210.6U
Authority: CN
Inventors: 李志敏; 吴桂安; 朱莲宗; 黄国宗; 邓飞忠; 仇明贵; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2023-05-23
Anticipated expiration: 2031-02-05

Abstract

The utility model provides a burner monolithic, which comprises an injection pipe, a fire exhaust shell with an upper opening and a combustion plate arranged on the upper opening, wherein a fire hole is formed in the combustion plate, the injection pipe comprises a first injection pipe and a second injection pipe, the air inlet end of the first injection pipe is opposite to the air inlet end of the second injection pipe, a first air outlet channel is formed between the air outlet end of the first injection pipe and the fire hole, and a second air outlet channel is formed between the air outlet end of the second injection pipe and the fire hole. The uniformity of the airflow velocity at the outlet of the fire hole is effectively improved, and the flame surface interference among the flame groups is reduced.

Description

Combustor monolithic and have its combustor

Technical Field

The utility model relates to the technical field of combustors, in particular to a combustor single chip and a combustor with the same.

Background

The single-channel tobacco pipe type burner in the single-piece structure form of the existing burner is one of the most widely applied burners, but the single-channel tobacco pipe type burner is influenced by the structure of the single-channel tobacco pipe type burner, so that the pressure at the inlet far away from fuel gas and air is inevitably low, the difference between left and right flow velocity is large, and the combustion noise is increased. The burner monolithic is designed to strictly control the profiling depth and the width of the fire hole, because the profiling depth and the width of the fire hole have great influence on the outlet speed distribution of the gas-air mixture, and when the components and the concentration of the fuel mixture are certain: flashback occurs when the flame propagation speed Sn > Vm (average flow velocity of mixture) is large (when the speed difference is large); when Sn is smaller than Vm, the flame is removed, the shape of the fire hole has great influence on the flame, the inner flame of the V-shaped staggered strip fire hole is thinner, the flame stabilizing performance is weaker, and the combustion working condition becomes worse when the fluctuation of external conditions is slightly larger; the processing of the meshes of the single-piece mesh burner is complicated, and the applicable conditions are higher; the combustor single chip in the forms adopted by the existing combustor is extremely easy to cause unstable fluctuation of heat release rate and cause combustion oscillation of a system when carrying out development design of products with large liter and smaller combustion volume cavities, and extremely poor use experience is provided for users.

Disclosure of Invention

The utility model solves one of the problems existing in the related art to a certain extent, and therefore, the utility model aims to provide a burner monolithic, and the flow rate of the airflow at the fire hole outlet is uniform.

The above object is achieved by the following technical scheme:

the utility model provides a combustor monolithic, includes that injection pipe, upper shed's fire row shell and setting are in burning board on the upper shed is equipped with the fire hole on burning board, injection pipe includes first injection pipe and second injection pipe, the inlet end of first injection pipe with the inlet end of second injection pipe sets up relatively, the inlet end of first injection pipe with form first passageway of giving vent to anger between the fire hole the outlet end of second injection pipe with form the second passageway of giving vent to anger between the fire hole.

As a further improvement of the utility model, the central line of the air inlet end of the first injection pipe and the central line of the air inlet end of the second injection pipe are on the same horizontal plane.

As a further improvement of the utility model, the first injection pipe and/or the second injection pipe respectively comprises a contraction section, a diffusion section and a mixing section from the air inlet end to the air outlet end, wherein the cross section of the contraction section gradually decreases from one side close to the air inlet end to one side far away from the air inlet end, the cross section of the diffusion section gradually increases from one side close to the air inlet end to one side far away from the air inlet end, and the mixing section is used for communicating the diffusion section with the fire hole.

As a further improvement of the utility model, the fire hole is longitudinally arranged along the combustion plate, the fire hole comprises a main fire hole arranged near the center of the combustion plate and auxiliary fire holes arranged at two ends of the combustion plate, the mixing section comprises a first containing cavity communicated with the main fire hole and a second containing cavity communicated with the auxiliary fire hole, and the volume of the first containing cavity is larger than that of the second containing cavity.

As a further improvement of the present utility model, the combustion plate includes a first inclined plate and a second inclined plate, one end of the first inclined plate is connected to one end of the second inclined plate, the first inclined plate is disposed obliquely downward from one end far from the second inclined plate to one end close to the second inclined plate, and the second inclined plate is disposed obliquely downward from one end far from the first inclined plate to one end close to the first inclined plate.

As a further improvement of the utility model, a plurality of fire hole groups are arranged on the combustion plate, and each fire hole group comprises 8-12 fire holes.

As a further improvement of the utility model, a flame stabilizing groove is formed between the fire grate shell and the left and right side walls of the combustion plate, and the width of the flame stabilizing groove is 0.5-2mm.

As a further improvement of the utility model, the flame stabilizing groove comprises a first flame stabilizing groove formed between the flame row shell and the left side wall of the combustion plate, a second flame stabilizing groove formed between the flame row shell and the right side wall of the combustion plate, a first flame transmitting sheet is further arranged on the first flame stabilizing groove, a second flame transmitting sheet is arranged on the second flame stabilizing groove, the first flame transmitting sheet and the second flame transmitting sheet are obliquely arranged, and an included angle of 20-180 degrees is formed between the first flame transmitting sheet and the second flame transmitting sheet.

As a further improvement of the utility model, the fire grate shell is in a wedge-shaped structure with a large middle and small two sides.

The utility model aims to provide a combustor with low working noise.

The above object is achieved by the following technical scheme:

the burner comprises the burner single chip and further comprises a gas distribution pipe, wherein the gas distribution pipe is provided with a first nozzle and a second nozzle, the first nozzle faces the first injection pipe, and the second nozzle faces the second injection pipe.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

1. the utility model provides a burner monolithic, which effectively improves the uniformity of airflow velocity at the outlet of a fire hole, reduces the interference of flame surfaces among flame groups, reduces working noise, effectively ensures combustion intensity and combustion efficiency, and ensures full combustion.

2. The utility model provides a combustor, which has low working noise, effectively ensures combustion intensity and combustion efficiency and ensures full combustion.

Drawings

FIG. 1 is a schematic view of a single burner piece in an embodiment;

FIG. 2 is a cross-sectional view of a single burner piece in an embodiment;

FIG. 3 is another cross-sectional view of a single burner piece of an embodiment;

FIG. 4 is a side view of a single burner piece of an embodiment;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a schematic view of the structure of the fire grate shell in the embodiment.

Detailed Description

The following examples illustrate the utility model, but the utility model is not limited to these examples. Modifications and equivalents of some of the technical features of the specific embodiments of the present utility model may be made without departing from the spirit of the present utility model, and they are all included in the scope of the claimed utility model.

Embodiment one:

referring to fig. 1-6, a burner monolithic 1 of the present utility model comprises an injection pipe 2, a fire exhaust shell 9 with an upper opening, and a combustion plate 3 arranged on the upper opening, wherein a fire hole 4 is arranged on the combustion plate 3, the injection pipe 2 comprises a first injection pipe 21 and a second injection pipe 22, the air inlet end of the first injection pipe 21 is opposite to the air inlet end of the second injection pipe 22, a first air outlet channel is formed between the air outlet end of the first injection pipe 21 and the fire hole 4, and a second air outlet channel is formed between the air outlet end of the second injection pipe 22 and the fire hole 4.

The utility model provides a burner single chip 1, which comprises two injection pipes 2, wherein the two injection pipes 2 are a first injection pipe 21 and a second injection pipe 22 respectively, the first injection pipe 21 and the second injection pipe 22 are arranged oppositely, a gas distribution pipe 8 can be arranged between the first injection pipe 21 and the second injection pipe 22, a nozzle is arranged on the gas distribution pipe 8, the nozzle comprises a first nozzle 81 and a second nozzle 82, the first nozzle 81 faces the first injection pipe 21, the second nozzle 82 faces the second injection pipe 22, under the premise of providing the same gas quantity, when the nozzle is designed, the pressure value of the gas sprayed out by the nozzle is in proportion to the square of the outlet flow velocity of a fire hole 4, and as the two nozzles respectively provide the gas to the two injection pipes 2, the secondary pressure value can be reduced when the pressure value is designed, and therefore, when the two nozzles are designed, the two nozzles can be designed into smaller sizes, but the combustion strength and the combustion efficiency are not reduced, the sufficiency of combustion and the flue gas index are effectively improved, and the combustion strength and the combustion efficiency are ensured. The uniformity of the airflow velocity at the outlet of the fire hole is effectively improved, and the flame surface interference among the flame groups is reduced.

The lower secondary pressure value of the fuel gas is affected by external conditions and primary pressure fluctuation, namely, the value of the gear-breaking pressure interval which possibly occurs originally is also reduced, so that the applicability, the comfort and the reliability of the whole machine are greatly improved.

The reduction of the secondary pressure value of the fuel gas and the smaller outlet flow velocity of the fire hole 4 can greatly reduce the noise generated by air flow disturbance and reduce the working noise.

The central line of the air inlet end of the first injection pipe 21 and the central line of the air inlet end of the second injection pipe 22 are on the same horizontal plane. Because the air inlet end of the first injection pipe 21 and the air inlet end of the second injection pipe 22 are arranged oppositely, the central line is on the same horizontal plane, and the first nozzle 81 and the second nozzle 82 are symmetrically arranged on the gas distribution pipe 8, the gas can be provided for the first injection pipe 21 and the second injection pipe 22, and the gas distribution pipe is reasonable in design and convenient to use.

The first injection pipe 21 and/or the second injection pipe 22 respectively comprise a contraction section 5, a diffusion section 6 and a mixing section 7 from an air inlet end to an air outlet end, the cross section of the contraction section 5 gradually decreases from one side close to the air inlet end to one side far away from the air inlet end, the cross section of the diffusion section 6 gradually increases from one side close to the air inlet end to one side far away from the air inlet end, and the mixing section 7 is used for communicating the diffusion section 6 with the fire hole 4.

The fuel gas and air entering the injection pipe 2 sequentially enter the air hole of the fire grate shell 9 through the contraction section 5, the diffusion section 6 and the mixing section 7. The convergent section 5 on the injection pipe 2 faces the nozzle, and the cross section of one end of the convergent section 5 facing the nozzle is larger, so that the fuel gas of the nozzle is conveniently sprayed into the injection pipe 2, and the cross section of one end of the convergent section 5 away from the nozzle is smaller, so that the air and the fuel gas entering the injection pipe 2 can be mixed. The mixed gas of the fuel gas and the air enters the diffusion section 6 after passing through the contraction section 5, and the cross section of the diffusion section 6 is changed from small to large, so that the fuel gas and the air are further uniformly mixed. The mixed gas of gas and air enters into the mixing section 7 after passing through the diffusion section 6, and the cross section of the mixing section 7 is semi-annular, so that the mixed gas of gas and air can reach the fire grate shell 9 or the fire hole 4 after passing through semi-annular turning, and the mixed gas of gas and air is fully mixed.

The fire hole 4 is longitudinally arranged along the combustion plate 3, the fire hole 4 comprises a main fire hole 41 close to the center of the combustion plate 3 and auxiliary fire holes 42 arranged at two ends of the combustion plate 3, the mixing section 7 comprises a first containing cavity 71 communicated with the main fire hole 41 and a second containing cavity 72 communicated with the auxiliary fire holes 42, and the volume of the first containing cavity 71 is larger than that of the second containing cavity 72.

In this embodiment, the connection between the first cavity 71 and the second cavity 72 is narrowed, so that the volume of the first cavity 71 is larger than the volume of the second cavity 72. In other embodiments, the volume of the first chamber 71 may gradually decrease from the first chamber 71 to the second chamber 72, so as to form a volume of the first chamber 71 larger than a volume of the second chamber 72. The mixed gas of the gas and the air can be adjusted to flow more toward the main fire hole 41.

Because the travel of the mixed gas of the air and the fuel gas in the injection pipe 2 to the middle part of the fire hole 4 or the fire row shell 9 is long, the travel to the two sides of the fire hole 4 or the fire row shell 9 is short, more mixed gas of the fuel gas and the air is regulated to flow towards the direction of the main fire hole 41, the concentration and the control flow rate of the mixed gas of the fuel gas and the air at the two sides are distributed, and the speed and the concentration of the whole outlet of the fire row are ensured to be approximately uniformly distributed.

The fire grate shell 9 is in a wedge-shaped structure with a large middle part and small two sides. The upper end edge of the fire row shell 9 is an arc edge with high middle and low two sides, and the lower end edge of the fire row shell 9 is an arc edge with low middle and high two sides, so that a wedge-shaped structure with large middle and small two sides of the fire row shell 9 is formed. The included angle a between the end of the upper end edge of the fire grate shell 9 or the end of the lower end edge of the fire grate shell 9 and the horizontal plane is 1-3 degrees. Because the travel of the mixed gas of the air and the fuel gas in the injection pipe 2 to the middle part of the fire hole 4 or the fire row shell 9 is longer, the travel to the two sides of the fire hole 4 or the fire row shell 9 is short, and the concentration and the flow velocity of the fuel gas and the air on the fire row are ensured to be uniform.

The combustion plate 3 comprises a first inclined plate 31 and a second inclined plate 32, one end of the first inclined plate 31 is connected with one end of the second inclined plate 32, the first inclined plate 31 is arranged in a downward inclined manner from one end far away from the second inclined plate 32 to one end close to the second inclined plate 32, and the second inclined plate 32 is arranged in a downward inclined manner from one end far away from the first inclined plate 31 to one end close to the first inclined plate 31.

The height difference H between the bottom and the top of the first inclined plate 31 or the second inclined plate 32 is 1-2mm, i.e. the profiling depth of the combustion plate 3 is 1-2mm. The cross section of the combustion plate 3 is V-shaped. The fire holes 4 are symmetrically distributed on the first inclined plate 31 and the second inclined plate 32.

A plurality of groups of fire holes 4 are arranged on the combustion plate 3, and each fire hole 4 group comprises 8-12 fire holes 4. In this embodiment, each of the fire hole 4 groups includes 10 fire holes 4. The 5 fire holes 4 are arranged on the first inclined plate, the 5 fire holes 4 are symmetrically arranged on the second inclined plate, and the 5 fire holes 4 on the first inclined plate or the second inclined plate are uniformly spaced, namely uniformly distributed.

And a flame stabilizing groove is formed between the fire row shell 9 and the left and right side walls of the combustion plate 3, and the width C of the flame stabilizing groove is 0.5-2mm.

The flame stabilizing groove comprises a first flame stabilizing groove 11 formed between the flame row shell 9 and the left side wall of the combustion plate 3, a second flame stabilizing groove 12 formed between the flame row shell 9 and the right side wall of the combustion plate 3, a first flame transmitting sheet 13 arranged on the first flame stabilizing groove 11, a second flame transmitting sheet 14 arranged on the second flame stabilizing groove 12, and the first flame transmitting sheet 13 and the second flame transmitting sheet 14 are obliquely arranged, an included angle b is formed between the first flame transmitting sheet 13 and the second flame transmitting sheet 14, and the included angle b is 20-180 degrees.

In this embodiment, the included angle b between the first fire-transmitting piece 13 and the second fire-transmitting piece 14 is 120 °.

Embodiment two:

the burner comprises the burner single chip 1, and further comprises a gas distribution pipe 8, wherein a first nozzle 81 and a second nozzle 82 are arranged on the gas distribution pipe 8, the first nozzle 81 faces the first injection pipe 21, and the second nozzle 82 faces the second injection pipe 22. The gas distribution pipe 8 is arranged between the first injection pipe 21 and the second injection pipe 22, the gas distribution pipe 8 is provided with a nozzle, the nozzle comprises a first nozzle 81 and a second nozzle 82, the first nozzle 81 faces the first injection pipe 21, the second nozzle 82 faces the second injection pipe 22, under the premise of providing the same gas quantity, the pressure value of the gas sprayed out of the nozzle is in direct proportion to the square of the flow velocity of the outlet of the fire hole 4 when the nozzle is designed, and the two nozzles respectively provide the gas for the two injection pipes 2, so that the secondary pressure value can be reduced when the pressure value is selected, the two nozzles can be designed into smaller size when designed, but the combustion intensity and the combustion efficiency are not reduced, the sufficiency of combustion and the flue gas index are improved, the combustion intensity and the combustion efficiency can be effectively ensured, and the full combustion is ensured.

The above-mentioned preferred embodiments should be regarded as illustrative examples of embodiments of the present application, and all such technical deductions, substitutions, improvements and the like which are made on the basis of the embodiments of the present application, are considered to be within the scope of protection of the present patent.

Claims

1. The utility model provides a combustor monolithic, its characterized in that includes injection pipe (2), upper shed's fire row shell (9) and sets up burning board (3) on the upper shed is equipped with fire hole (4) on burning board (3), injection pipe (2) are including first injection pipe (21) and second injection pipe (22), the inlet end of first injection pipe (21) with the inlet end of second injection pipe (22) sets up relatively, the outlet end of first injection pipe (21) with form first air outlet channel between fire hole (4) the outlet end of second injection pipe (22) with form the second air outlet channel between fire hole (4).

2. A burner tile according to claim 1, wherein the centre line of the inlet end of the first ejector tube (21) is in the same horizontal plane as the centre line of the inlet end of the second ejector tube (22).

3. A burner tile according to claim 1, wherein the first ejector tube (21) and/or the second ejector tube (22) comprises a constriction section (5), a diffuser section (6) and a mixing section (7) from the inlet end to the outlet end, respectively, the constriction section (5) having a gradually decreasing cross section from the side closer to the inlet end to the side farther from the inlet end, the diffuser section (6) having a gradually increasing cross section from the side closer to the inlet end to the side farther from the inlet end, the mixing section (7) communicating the diffuser section (6) with the fire hole (4).

4. A burner tile according to claim 3, wherein the fire holes (4) are arranged longitudinally along the burner plate (3), the fire holes (4) comprise a main fire hole (4) arranged near the center of the burner plate (3) and auxiliary fire holes (4) arranged at two ends of the burner plate (3), the mixing section (7) comprises a first containing cavity (71) communicated with the main fire hole (4) and a second containing cavity (72) communicated with the auxiliary fire hole (4), and the volume of the first containing cavity (71) is larger than that of the second containing cavity (72).

5. A burner tile according to any one of claims 1-4, wherein the burner tile (3) comprises a first inclined plate (31) and a second inclined plate (32), wherein one end of the first inclined plate (31) is connected to one end of the second inclined plate (32), and wherein the first inclined plate (31) is arranged obliquely downwards from one end away from the second inclined plate (32) to one end close to the second inclined plate (32), and wherein the second inclined plate (32) is arranged obliquely downwards from one end away from the first inclined plate (31) to one end close to the first inclined plate (31).

6. A burner tile according to claim 5, wherein groups of fire holes are provided in the burner plate (3), each group of fire holes comprising 8-12 fire holes (4).

7. A burner monolithic according to claim 1, characterized in that a flame holding groove is formed between the fire grate housing (9) and the left and right side walls of the combustion plate (3), the width of the flame holding groove being 0.5-2mm.

8. A burner monolithic according to claim 7, characterized in that said flame holding groove comprises a first flame holding groove (11) formed between said flame row case (9) and the left side wall of said combustion plate (3), and a second flame holding groove (12) formed between said flame row case (9) and the right side wall of said combustion plate (3), a first flame transfer piece (13) being further provided on said first flame holding groove (11), a second flame transfer piece (14) being provided on said second flame holding groove (12), said first flame transfer piece (13) and said second flame transfer piece (14) being arranged obliquely, and an angle of 20-180 ° being formed between said first flame transfer piece (13) and said second flame transfer piece (14).

9. A burner monolithic according to claim 1, wherein said fire grate shell (9) has a wedge-like structure with a large middle and a small two sides.

10. A burner comprising a burner tile according to any one of claims 1-9, further comprising a gas distribution pipe (8), wherein a first nozzle (81) and a second nozzle (82) are arranged on the gas distribution pipe (8), wherein the first nozzle (81) is directed towards the first ejector pipe (21), and wherein the second nozzle (82) is directed towards the second ejector pipe (22).