CN211781086U

CN211781086U - Full premix combustor

Info

Publication number: CN211781086U
Application number: CN202020128646.9U
Authority: CN
Inventors: 卢楚鹏; 潘同基; 李罗标; 李学研; 张上兵; 张华平; 潘泽林
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-10-27
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a full premix combustor, including the combustor casing, set up in the front bezel of combustor casing one end, be provided with two at least air inlet portions on the front bezel, air inlet portion includes: the air inlet is arranged on the front plate; an air outlet; the baffle is arranged on the air inlet hole, one side edge of the baffle and the front plate are encircled to form the air outlet hole, and the other side edge of the baffle and the front plate are encircled to form the air outlet hole; wherein, there are two at least adjacent air inlet portion, one in the air inlet portion one the venthole is towards another one in the air inlet portion the venthole, the utility model provides an air and gas's mixed effect, the velocity of flow is more stable, is favorable to stablizing the flame on the combustor casing, prevents from the flame, and combustor surface temperature distributes more evenly.

Description

Full premix combustor

Technical Field

The utility model relates to a combustor, in particular to full premix combustor.

Background

At present, most of burners used by gas quick water heaters are designed according to a partial premixing combustion method, namely an atmospheric burner, air directly enters the burner from an opening on a burner panel to be mixed, and the air and the gas are not fully mixed to start combustion. Because only part of air is premixed, not all air required by combustion, the heat intensity and the combustion temperature of the fire holes are limited, and incomplete combustion is more; when the heat load is large, the structure of the burner is heavy, so that the surface temperature of the existing burner is uneven, and the combustion is insufficient and unstable.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a fully premixed burner to solve one or more technical problems in the prior art, and at least provide a useful choice or creation condition.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a full premix combustor, includes the combustor casing, set up in the front bezel of combustor casing one end, be provided with two at least portions of admitting air on the front bezel, the portion of admitting air includes: the air inlet is arranged on the front plate; an air outlet; the baffle is arranged on the air inlet hole, one side edge of the baffle and the front plate are encircled to form the air outlet hole, and the other side edge of the baffle and the front plate are encircled to form the air outlet hole; wherein there are at least two adjacent inlet portions, one of the outlet holes in one of the inlet portions being directed towards one of the outlet holes in the other inlet portion.

The technical scheme at least has the following beneficial effects: the mixed gas of air and fuel gas enters the combustor shell through the air inlet part on the front plate, so that the air and the fuel gas are mixed more uniformly, specifically, the mixed gas of air and fuel gas enters from the air inlet hole and is blocked by the baffle plate and cannot directly enter the combustor shell, the air flow is turned and discharged through the air outlet holes on two sides, in two adjacent air inlet parts, any air outlet hole in one air inlet part is opposite to any air outlet hole in the other air inlet part, so that the mixed gas discharged from the air outlet holes mutually collides, the air flow is further mixed, and after the air outlet holes which do not mutually collide are formed, the mixed gas rushes to the combustor shell, the air flow is further mixed by the same realization method, thereby improving the mixing effect of air and fuel gas, the flow rate is more stable, the flame on the combustor shell is favorably stabilized, and the flame is prevented from leaving, the burner surface temperature distribution is more uniform.

As a further improvement of the above technical solution, an outer ring air intake assembly is disposed on the front plate, the outer ring air intake assembly includes a plurality of air intake portions arranged in an array around a central circumference of the front plate, and one of the air outlet holes of the air intake portions faces the burner housing.

As a further improvement of the above technical solution, an inner ring air intake assembly is disposed on the front plate, the inner ring air intake assembly is located inside the outer ring air intake assembly, the inner ring air intake assembly includes a plurality of air intake portions arranged in an array around a central circumference of the front plate, and an air outlet of one air intake portion of at least one outer ring air intake assembly faces an air outlet of one air intake portion of the inner ring air intake assembly.

As a further improvement of the technical scheme, the air outlet is in the shape of an arch, a rectangle or a trapezoid.

As a further improvement of the technical scheme, the combustor shell is provided with a plurality of fire hole groups, and each fire hole group comprises a main fire hole and a flame stabilizing hole. The main fire hole and the flame stabilizing hole beside the main fire hole can spray flame, and the flame stabilizing hole can stabilize the flame sprayed by the main fire hole.

As a further improvement of the above technical solution, the main flame hole is a long hole, the flame stabilizing holes are disposed along two sides of the main flame hole in the length direction, the number of the flame stabilizing holes located on the same side of the main flame hole in the length direction is not less than one, the main flame hole and the flame stabilizing holes are punched holes in the burner housing, and the area of the flame stabilizing holes is smaller than that of the main flame holes. Because the area of steady flame hole is less than the area of main flame hole, the resistance of steady flame hole is big under the mutual contrast, flame height is low, and the resistance of main flame hole is little, flame height is high, the flame that utilizes steady flame hole to produce stably lives the flame that main flame hole produced, so the high low dislocation distribution appears in the flame of every flame hole group, be favorable to stable flame, prevent from the flame, thereby every flame hole group is steady burning on the combustor casing, make combustor surface temperature even, be convenient for processing.

As a further improvement of the above technical solution, be provided with the first tongue of outside arch on the lateral wall of combustor casing, the lateral wall of first tongue is provided with first trompil, first trompil does steady flame hole, be provided with the through-hole on the lateral wall of combustor casing, the through-hole is located steady flame hole's side, the through-hole is followed the quantity that the length direction of steady flame hole was arranged and is set up is more than one, the through-hole is main flame hole. Because main burner port is seted up on the combustor casing, the flame projecting direction in main burner port is towards the outside of combustor casing, and the flame stabilizing hole is owing to set up the lateral wall at first tongue, make the flame root of flame projecting direction in flame stabilizing hole towards main burner port, heat and stable the flame root in main burner port, so the height staggered distribution appears in the flame of every burner port group, be favorable to stable flame, prevent from the flame, thereby every burner port group is stable burning on the combustor casing, make combustor surface temperature even.

As a further improvement of the above technical solution, a second tongue protruding outward is provided on an outer side wall of the burner housing, and the through hole is provided in a bottom surface of the second tongue. The height of the flame root of the main fire hole can be improved, so that the flame of the flame stabilizing hole can better shoot to the flame root of the main fire hole.

As a further improvement of the above technical solution, the burner housing is in the shape of a hollow cylinder. The structure can be conveniently matched with a cylindrical heat exchanger.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the front plate structure of the bow-shaped air outlet of the present invention;

FIG. 3 is a schematic diagram of the structure of the rectangular air outlet front plate of the present invention;

FIG. 4 is a schematic structural view of an embodiment of a burner housing according to the present invention;

fig. 5 is a schematic structural view of a second embodiment of the burner housing of the present invention.

In the drawings: 100-burner shell, 110-main fire hole, 120-flame stabilizing hole, 200-front plate, 210-baffle, 220-air inlet hole and 230-air outlet hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, 2 and 3, a fully premixed burner includes a burner housing 100 and a front plate 200, an air inlet hole 220 is provided on the front plate 200, two side edges of a baffle 210 are lapped on the front plate 200, the baffle 210 can be integrated with the front plate 200, two other side edges of the baffle 210 and the front plate 200 enclose an air outlet hole 230, a mixed gas of air and fuel gas passes through the air inlet hole 220 on the front plate 200 and is blocked by the baffle 210 and cannot directly enter the burner housing 100, the air flow is turned and discharged through the air outlet holes 230 on two sides, at least two adjacent air inlet portions exist, one air outlet hole 230 in one air inlet portion faces one air outlet hole 230 in the other air inlet portion, so that the mixed gas discharged from the air outlet holes 230 mutually collide with each other, the air flow is further mixed, and after the air is discharged without forming the air outlet holes 230 mutually colliding with each other, the mixed gas collides with the burner housing 100, the same realization air current further mixes, has so improved the mixed effect of air with the gas, and the velocity of flow is more stable, is favorable to stabilizing the flame on the combustor casing 100, prevents from the flame, and combustor surface temperature distributes more evenly.

The outer ring air inlet assembly is arranged on the front plate 200 and comprises a plurality of air inlet portions arranged around the central circumference of the front plate 200 in an array mode, and each air inlet portion is provided with one air outlet hole 230 facing the combustor shell 100, so that when mixed gas hits the combustor shell 100, turbulent flow is formed, and further mixing of the gas is facilitated.

The front plate 200 is provided with the inner ring air inlet assembly, the air inlet portion of the outer ring air inlet assembly is surrounded into an outer circle, the air inlet portion of the inner ring air inlet assembly is surrounded into an inner circle and is arranged in the outer circle, the air outlet hole 230 of one air inlet portion of at least one outer ring air inlet assembly faces the air outlet hole 230 of one air inlet portion of one inner ring air inlet assembly, the air outlet of the air outlet holes 230 adjacent to the outer circle and the inner circle can form opposite impact, and mixing is better achieved.

The shape of the air outlet 230 can be various, and in some embodiments, the air outlet 230 is arcuate, so that the arcuate air outlet 230 can be more easily machined; in some embodiments, the exit aperture 230 is rectangular in shape. The rectangular air outlet holes 230 have larger area and larger air outlet amount; in some embodiments, the exit aperture 230 is trapezoidal in shape. The trapezoidal air outlet holes 230 have a large area and are easy to machine.

In the present embodiment, the burner housing 100 is provided with a plurality of fire hole sets, and the fire hole sets include a main fire hole 110 and a flame stabilizing hole 120. The flame can be sprayed from both the main fire hole 110 and the flame stabilizing holes 120 beside the main fire hole 110, and the flame sprayed from the main fire hole 110 can be stabilized by the flame stabilizing holes 120.

The shape design of the main fire hole 110 and the flame stabilizing hole 120 includes two types:

as shown in fig. 4, in the first embodiment, the main fire hole 110 is a long hole, the flame stabilizing holes 120 are disposed along two sides of the main fire hole 110 in the length direction, the number of the flame stabilizing holes 120 located on the same side of the main fire hole 110 in the length direction is not less than one, the main fire hole 110 and the flame stabilizing holes 120 are punched holes on the burner housing 100, and the area of the flame stabilizing holes 120 is smaller than that of the main fire hole 110. Because the area of steady flame hole 120 is less than the area of main fire hole 110, the resistance of steady flame hole 120 is big under the mutual contrast, the flame height is low, and the resistance of main fire hole 110 is little, the flame height is high, the flame that utilizes steady flame hole 120 to produce stabilizes the flame that main fire hole 110 produced, so the high-low dislocation distribution appears in the flame of every fire hole group, be favorable to stabilizing flame, prevent from the flame, thereby every fire hole group is stable burning on combustor casing 100, make combustor surface temperature even, be convenient for process.

As shown in fig. 5, in the second embodiment, a first convex groove protruding outward is disposed on an outer side wall of the burner housing 100, a first opening is disposed on a side wall of the first convex groove, the first opening is a flame stabilizing hole 120, a through hole is disposed on an outer side wall of the burner housing 100, the through hole is located beside the flame stabilizing hole 120, the number of the through holes arranged in the length direction of the flame stabilizing hole 120 is more than one, and the through hole is the main flame hole 110. Because main fire hole 110 is seted up on combustor casing 100, the flame projecting direction of main fire hole 110 is towards the outside of combustor casing 100, and flame stabilizing hole 120 is owing to be the lateral wall of seting up at first tongue, make flame projecting direction of flame stabilizing hole 120 towards the flame root of main fire hole 110, heat and stabilize the flame root of main fire hole 110, the height dislocation distribution appears in the flame of every fire hole group so, be favorable to stabilizing flame, prevent from leaving the flame, thereby every fire hole group is steady burning on combustor casing 100, make combustor surface temperature even.

Based on the further improvement of the second embodiment, the outer sidewall of the burner housing 100 is provided with the second convex groove protruding outward, and the through hole is disposed on the bottom surface of the second convex groove, so that the height of the flame root of the main flame hole 110 can be increased, and the flame of the flame stabilizing hole 120 can be better directed to the flame root of the main flame hole 110.

In some embodiments, the burner housing 100 is hollow cylindrical. The structure can be conveniently matched with a cylindrical heat exchanger.

In some embodiments, the length of the baffle 210 extends perpendicular to the radius of the front plate 200. The direction of the flow of the outlet air from the outlet holes 230 flows in the radial direction of the front plate 200.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A fully premixed combustor characterized by: including combustor casing (100), set up in front bezel (200) of combustor casing (100) one end, be provided with two at least portions of admitting air on front bezel (200), the portion of admitting air includes:

an air intake hole (220) provided on the front plate (200);

an outlet hole (230);

the baffle (210) is arranged on the air inlet hole (220), one side edge of the baffle (210) and the front plate (200) enclose to form the air outlet hole (230), and the other side edge of the baffle (210) and the front plate (200) enclose to form the air outlet hole (230);

wherein there are at least two adjacent inlet portions, one outlet hole (230) of one inlet portion facing one outlet hole (230) of the other inlet portion.

2. A fully premixed burner according to claim 1, characterized in that: the front plate (200) is provided with an outer ring air inlet assembly, the outer ring air inlet assembly comprises a plurality of air inlet portions arranged around the central circumference of the front plate (200), and one air outlet hole (230) of each air inlet portion faces the combustor shell (100).

3. A fully premixed burner according to claim 2, characterized in that: the front plate (200) is provided with an inner ring air inlet assembly, the inner ring air inlet assembly is located on the inner side of the outer ring air inlet assembly, the inner ring air inlet assembly comprises a plurality of air inlet portions arranged around the central circumference of the front plate (200) in an array mode, and an air outlet hole (230) of one air inlet portion of at least one outer ring air inlet assembly faces an air outlet hole (230) of one air inlet portion of the inner ring air inlet assembly.

4. A fully premixed burner according to claim 1, characterized in that: the air outlet holes (230) are arched, rectangular or trapezoidal.

5. A fully premixed burner according to claim 1, characterized in that: the burner is characterized in that a plurality of fire hole groups are arranged on the burner shell (100), and each fire hole group comprises a main fire hole (110) and a flame stabilizing hole (120).

6. A fully premixed burner according to claim 5, characterized in that: the main fire hole (110) is the rectangular hole, surely, flame hole (120) are followed the both sides setting on main fire hole (110) length direction is located the quantity of the steady flame hole (120) of main fire hole (110) length direction on the same side is no less than one, main fire hole (110) with steady flame hole (120) do punch a hole on combustor casing (100), the area of steady flame hole (120) is less than the area of main fire hole (110).

7. A fully premixed burner according to claim 5, characterized in that: be provided with outside bellied first tongue on the lateral wall of combustor casing (100), the lateral wall of first tongue is provided with first trompil, first trompil does steady flame hole (120), be provided with the through-hole on the lateral wall of combustor casing (100), the through-hole is located the side of steady flame hole (120), the through-hole is followed the quantity that the length direction of steady flame hole (120) was arranged and is set up is more than one, the through-hole does main flame hole (110).

8. A fully premixed burner according to claim 7, characterized in that: the outer side wall of the combustor shell (100) is provided with a second convex groove protruding outwards, and the through hole is formed in the bottom surface of the second convex groove.

9. A fully premixed burner according to claim 1, characterized in that: the burner housing (100) is hollow and cylindrical.

10. A fully premixed burner according to claim 9, characterized in that: the length extension direction of the baffle (210) is perpendicular to the radius extension direction of the front plate (200).