CN211781085U

CN211781085U - Full premix combustor

Info

Publication number: CN211781085U
Application number: CN202020128610.0U
Authority: CN
Inventors: 卢楚鹏; 潘同基; 张华平; 岑锦泉; 李罗标; 张上兵; 李学研
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 a plurality of on the front bezel and admit air the group, it includes to admit air the group: the first air inlet is arranged on the front plate; the second air inlet hole is arranged on the front plate and is positioned beside the first air inlet hole; an included angle smaller than 90 degrees is formed between the baffle and the front plate, and one side, far away from the second air inlet hole, of the baffle is connected to one side, far away from the second air inlet hole, of the first air inlet hole; wherein, the area of first inlet port is greater than the area of second inlet port, the utility model provides high air and the mixed effect of gas, the velocity of flow is more stable, is favorable to stabilizing 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, include the combustor casing, set up in the front bezel of combustor casing one end, be provided with a plurality of on the front bezel and admit air the group, it includes to admit air the group: the first air inlet is arranged on the front plate; the second air inlet hole is arranged on the front plate and is positioned beside the first air inlet hole; an included angle smaller than 90 degrees is formed between the baffle and the front plate, and one side, far away from the second air inlet hole, of the baffle is connected to one side, far away from the second air inlet hole, of the first air inlet hole; wherein the area of the first air inlet hole is larger than that of the second air inlet hole.

The technical scheme at least has the following beneficial effects: the mixed gas of air and gas enters into the combustor casing through the air inlet group on the front bezel, can make air and gas mixture more even, it is specific, the mixed gas of air and gas gets into from first inlet port and second inlet port respectively, because the baffle has on the first inlet port, and have the contained angle that is less than 90 degrees between baffle and the front bezel, consequently, the mixed gas after entering into first inlet port collides each other and mixes with the mixed gas after entering into the second inlet port under the guide of baffle, form the turbulent flow, the further mixing of air and gas has been realized, so the mixing effect of air and gas has been improved, the velocity of flow is more stable, be favorable to stabilizing the flame on the combustor casing, prevent from leaving the flame, combustor surface temperature distributes more evenly.

As a further improvement of the above technical solution, a region through which one side of the baffle close to the second air inlet is vertically projected to a plane where the front plate is located is an air outlet region, and the area of the air outlet region is larger than that of the second air inlet. The air flow entering from the first air inlet hole and guided by the baffle is larger than the air flow directly entering from the second air inlet hole, so that the mixing is more uniform.

As a further improvement of the above technical solution, the air inlet set further includes a third air inlet hole, the third air inlet hole is disposed on the front plate, and the third air inlet hole and the second air inlet hole are arranged along the length direction of the baffle. The third air inlet hole increases the air flow entering from the front plate, and the air flow entering from the first air inlet hole is better mixed.

As a further improvement of the above technical solution, an area of the first air intake hole is larger than an area of the third air intake hole. The air flow entering from the first air inlet hole and guided by the baffle is larger than the air flow directly entering from the third air inlet hole, so that the mixing is more uniform.

As a further improvement of the above technical solution, an area of the air outlet region is larger than a sum of an area of the second air inlet hole and an area of the third air inlet hole. The air flows entering from the first air inlet hole and guided by the baffle are respectively larger than the air flows directly entering from the first air inlet hole and the third air inlet hole, so that the mixing is more uniform.

As a further improvement of the technical scheme, a fourth air inlet hole is formed in the middle of the front plate. The flow rate of the whole cavity is more uniform, and the mixing is more uniform.

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.

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 present invention;

FIG. 3 is a schematic structural view of an embodiment of a burner housing according to the present invention;

fig. 4 is a schematic structural view of a second embodiment of the burner housing of the present invention.

In the drawings: 100-a burner shell, 110-a main fire hole, 120-a flame stabilizing hole, 200-a front plate, 210-a baffle, 220-a first air inlet hole, 230-a second air inlet hole, 240-a third air inlet hole and 250-a fourth air inlet 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.

As shown in fig. 1 and 2, a fully premixed burner includes a burner housing 100 and a front plate 200, the front plate 200 is provided with a first air inlet hole 220 and a second air inlet hole 230, a baffle 210 is disposed on a side of the first air inlet hole 220, and a side of the baffle 210 away from the second air inlet hole 230 is connected to a side of the first air inlet hole 220 away from the second air inlet hole 230, i.e., the baffle 210 is disposed obliquely with respect to the front plate 200 and can guide an air flow entering from the first air inlet hole 220 to collide with and mix with an air flow entering from the second air inlet hole 230 to form a turbulent flow, thereby further mixing of the air and the gas is realized, so that a mixing effect of the air and the gas is improved, a flow rate is more stable, a flame on the burner housing 100 is stabilized, a flame is prevented from leaving, and a temperature distribution on a surface.

In this embodiment, a region through which one side of the baffle 210 close to the second air inlet 230 vertically projects to the plane of the front plate 200 is an air outlet region, and the area of the air outlet region is larger than that of the second air inlet 230. The air flow entering from the first air intake holes 220 and guided through the baffle 210 is greater than the air flow directly entering from the second air intake holes 230, resulting in more uniform mixing.

In some embodiments, the air inlet set further includes a third air inlet hole 240, the third air inlet hole 240 is disposed on the front plate 200, and the third air inlet hole 240 and the second air inlet hole 230 are arranged along the length direction of the baffle 210. The third air inlet hole 240 increases the amount of air flow entering from the front plate 200 to achieve better mixing with the air flow entering from the first air inlet hole 220.

In some embodiments, the area of the first air intake hole 220 is larger than the area of the third air intake hole 240. The air flow entering from the first air intake holes 220 and guided through the baffle 210 is greater than the air flow directly entering from the third air intake holes 240, resulting in more uniform mixing.

In some embodiments, the area of the outlet air region is greater than the sum of the area of the second air inlet holes 230 and the area of the third air inlet holes 240. The flow rate of the air flow entering from the first air inlet hole 220 and guided by the baffle 210 is greater than the sum of the flow rates of the air flows directly entering from the first air inlet hole 220 and the third air inlet hole 240, so that the mixing is more uniform.

In some embodiments, the front plate 200 is provided with a fourth air intake hole 250 in the middle. The flow rate of the whole cavity is more uniform, and the mixing is more uniform.

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. 3, 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. 4, 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, a second tongue protruding outward is provided on the outer side wall of the burner housing 100, and the through hole is provided on the bottom surface of the second tongue. The height of the flame root of the main fire hole 110 can be increased, so that the flame of the flame stabilizing hole 120 can be better directed to the flame root of the main fire hole 110.

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

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 gist of the present invention within the knowledge range 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 a plurality of on front bezel (200) and admit air the group, it includes to admit air the group:

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

the second air inlet hole (230) is arranged on the front plate (200) and is positioned beside the first air inlet hole (220);

the baffle (210) and the front plate (200) form an included angle smaller than 90 degrees, and one side, far away from the second air inlet hole (230), of the baffle (210) is connected to one side, far away from the second air inlet hole (230), of the first air inlet hole (220);

wherein the area of the first intake hole (220) is larger than the area of the second intake hole (230).

2. A fully premixed burner according to claim 1, characterized in that: one side of the baffle (210) close to the second air inlet hole (230) vertically projects to a region where a plane of the front plate (200) passes through is an air outlet region, and the area of the air outlet region is larger than that of the second air inlet hole (230).

3. A fully premixed burner according to claim 2, characterized in that: the air inlet group further comprises third air inlet holes (240), the third air inlet holes (240) are formed in the front plate (200), and the third air inlet holes (240) and the second air inlet holes (230) are arranged along the length direction of the baffle plate (210).

4. A fully premixed burner according to claim 3, characterized in that: the area of the first air intake hole (220) is larger than that of the third air intake hole (240).

5. A fully premixed burner according to claim 3, characterized in that: the area of the air outlet area is larger than the sum of the area of the second air inlet hole (230) and the area of the third air inlet hole (240).

6. A fully premixed burner according to claim 1, characterized in that: the middle part of the front plate (200) is provided with a fourth air inlet hole (250).

7. 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).

8. A fully premixed burner according to claim 7, 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).

9. A fully premixed burner according to claim 7, 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).

10. A fully premixed burner according to claim 9, 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.