An efficient burner flame stabilization structure

Abstract

The present invention relates to a flame stabilization structure for an efficient burner, which includes a flame hole plate. A plurality of main flame holes are formed on the flame hole plate. The main flame holes are long strip-shaped holes, and the plurality of main flame holes are arranged in parallel at intervals. Flame stabilization holes are provided on both sides of the main flame holes. The flame stabilization holes are long strip-shaped holes parallel to the main flame holes, and the opening plane of the flame stabilization holes is perpendicular to the opening plane of the main flame holes. In the present invention, the flame stabilization holes are arranged along the length direction of the main flame holes, directly heating the root of the main flame holes, accelerating the flame propagation speed of the main flame holes, and enabling the combustion to occur in the air-gas mixed gas close to the flame port plane, realizing stable combustion of the flame. The flame stabilization method of the flame stabilization holes in the present invention is perpendicular cross flame stabilization between the flame stabilization holes and the main flame holes, with uniform and efficient flame stabilization effect.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and more particularly to a flame stabilization structure for an efficient burner. Background Art

[0002] At present, the burner and wall-mounted boiler markets are highly competitive, and each manufacturer has been reducing costs to improve market competitiveness. For burners, the requirements are small volume and high heat load. Since the original burners were designed according to a certain combustion intensity, if the heat load is increased (about 25 - 40%), it will have a great impact on the normal combustion of the burner.

[0003] The main flame holes of the burner are the main flame holes for gas output and combustion. When the heat load approaches the heat intensity of the maximum flame hole, problems such as flame lift-off, flutter, and deviation will occur due to factors such as the flow rate and mixing ratio of the air-gas mixture. The stability of the burner flame has a very large relationship with the flame stabilization method. Usually, the flame stabilization method is to arrange flame stabilization holes around the main flame holes of the burner, make the flame combustion direction parallel to the main flame holes, and rely on the flame diffusion of the flame stabilization holes to heat the root of the main flame hole flame, playing a role in stabilizing the flame.

[0004] Currently, the commonly used parallel small-hole flame stabilization (as shown in Figure 4 ) has a poor flame stabilization effect. The distance between the flame stabilization flame of the flame stabilization hole and the fire port plane increases with the heat intensity of the fire port of the main flame hole. Usually, problems such as the flame being too high to heat the heat exchanger, excessive combustion noise, and excessive exhaust gas indicators occur. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems by providing a flame stabilization structure for an efficient burner, providing a cross-shaped and strip-shaped flame stabilization structure, and achieving a very good flame stabilization effect.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A flame stabilization structure for an efficient burner, including a flame hole plate, on which a plurality of main flame holes are opened. The main flame holes are long strip-shaped holes, and the plurality of main flame holes are arranged in parallel at intervals.

[0008] Flame stabilization holes are provided on both sides of the main flame holes. The flame stabilization holes are long strip-shaped holes parallel to the main flame holes, and the opening plane of the flame stabilization holes is perpendicular to the opening plane of the main flame holes.

[0009] The flame stabilization holes of the present invention are arranged along the length direction of the main flame holes, directly heating the root of the main flame holes, accelerating the flame propagation speed of the main flame holes, and enabling the combustion to occur in the air-gas mixture close to the fire port plane, realizing stable combustion of the flame. The flame stabilization method of the flame stabilization holes of the present invention is perpendicular cross flame stabilization between the flame stabilization holes and the main flame holes, with uniform and efficient flame stabilization effect.

[0010] Preferably, a flame stabilizing hole baffle is provided on the flame hole plate, and a long strip hole is formed on the side of the flame stabilizing hole baffle to form the flame stabilizing hole.

[0011] Preferably, the flame stabilizing holes between adjacent main flame holes are bilateral flame stabilizing holes.

[0012] Preferably, unilateral flame stabilizing holes are provided on the outer side of the outermost flame hole plate. To ensure the flame stabilizing effect of the main flame holes at both ends of the burner, unilateral flame stabilizing holes are specially designed at both ends to avoid the situation that there is no main flame port on one side of the flame stabilizing hole, which may cause the flame stabilizing air-gas mixture to have uneven flow due to the smaller gas resistance on the side without the main flame hole, affecting the flame stabilizing effect of the main flame holes at both ends.

[0013] Preferably, the flame stabilizing holes on the side of the flame stabilizing hole baffle are higher than the plane of the flame hole plate.

[0014] Preferably, the flame stabilizing holes are provided with transitional rounded corners. To ensure the strength of the flame stabilizing holes, the part of the flame stabilizing holes higher than the plane of the main flame holes adopts transitional rounded corners in structure. This can avoid cracks at the protruding parts of the flame stabilizing holes, resulting in the failure of the flame stabilizing hole baffle and the failure of flame stabilization.

[0015] Preferably, the width of the flame stabilizing hole is 0.08 to 0.8 times the width of the main flame hole, and more preferably 0.25 to 0.5 times.

[0016] Preferably, the width of the main flame hole is 0.8 - 2.5 mm; the width of the main flame hole is the main structural index for reducing combustion noise. The width of the main flame hole should not be too wide, otherwise combustion defects such as combustion noise and flashback may occur, affecting the flame stabilizing effect and increasing the exhaust gas index.

[0017] Preferably, the width of the flame stabilizing hole is 0.2 - 0.5 mm. The width of the gap changes according to the heat load of the main flame hole.

[0018] Preferably, the length of the flame stabilizing hole is 60% - 80% of the length of the main flame hole. To ensure the flame stabilizing effect of the main flame hole, the length of the flame stabilizing hole should not be greater than the length of the main flame hole, so as to ensure the inflow of air required for the combustion of the main flame hole.

[0019] Preferably, the distance between the edge of the main flame hole and the flame stabilizing hole is 1 to 2 times the width of the main flame hole. The distance between the edge of the main flame hole and the flame stabilizing hole directly affects the flame stabilizing effect. Being too far or too close will cause combustion noise and a decrease in the flame stabilizing effect.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The flame-stabilizing holes of the present invention are arranged along the length direction of the main flame holes, directly heating the root of the main flame holes, accelerating the flame propagation speed of the main flame holes, and enabling the combustion to occur on the air-gas mixture close to the plane of the flame port, achieving stable combustion of the flame. The flame-stabilizing method of the flame-stabilizing holes of the present invention is perpendicular cross-stabilization between the flame-stabilizing holes and the main flame holes, with uniform and efficient flame-stabilizing effect.

[0022] 2. To ensure the flame-stabilizing effect of the main flame holes at both ends of the burner, flame-stabilizing holes with single-sided flame stabilization are specifically designed at both ends to avoid the situation where there is no main flame port on one side of the flame-stabilizing hole, preventing the flame-stabilizing air-gas mixture from causing uneven flow of the flame-stabilizing gas due to the smaller gas resistance on the side without the main flame hole, which may affect the flame-stabilizing effect of the main flame holes at both ends.

[0023] 3. To ensure the strength of the flame-stabilizing holes, a transition fillet is adopted in the structure at the part where the flame-stabilizing holes protrude above the plane of the main flame holes. This is to avoid cracks in the protruding part of the flame-stabilizing holes, which may cause the flame-stabilizing baffle to fail and result in the failure of flame stabilization.

[0024] 4. The width of the main flame holes is the main structural index for reducing combustion noise. The width of the main flame holes should not be too wide, otherwise combustion defects such as combustion noise and flashback may occur, affecting the flame-stabilizing effect and causing an increase in exhaust gas indicators. Through experiments, it is determined that the width of the main flame holes of the present invention is 0.8 - 2.5 mm.

[0025] 5. To ensure the flame-stabilizing effect of the main flame holes, the length of the flame-stabilizing holes should not be greater than the length of the main flame holes to ensure the inflow of the required air during the combustion of the main flame holes. The length of the flame-stabilizing holes is 60% - 80% of the length of the main flame holes.

[0026] 6. The distance between the edge of the main flame holes and the flame-stabilizing holes directly affects the flame-stabilizing effect. Being too far or too close will cause combustion noise and a decrease in the flame-stabilizing effect. Through experiments, it is determined that the distance between the edge of the main flame holes and the flame-stabilizing holes of the present invention is 1 to 2 times the width of the main flame holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the flame-stabilizing structure of the high-efficiency burner of the present invention;

[0028] Figure 2 is a schematic diagram of the principle of flame stabilization of the high-efficiency burner of the present invention;

[0029] Figure 3 is a top view of a flame-stabilizing structure of a high-efficiency burner of the present invention;

[0030] Figure 4 is a top view of the flame-stabilizing structure of an existing high-efficiency burner;

[0031] In the figures: flame hole plate 1, main flame hole 2, flame-stabilizing hole 3, flame-stabilizing baffle 4, double-sided flame-stabilizing baffle 401, single-sided flame-stabilizing baffle 402, main flame outer flame 5, main flame inner flame 6, stable flame 7. Detailed implementation mode

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 4 FIG. is a top view of the flame stabilization structure of an existing high-efficiency burner, which adopts a parallel small-hole flame stabilization. A plurality of small-hole flame stabilizations 3' are arranged on both sides of the main flame holes 2'. The flame stabilization effect is poor. The distance of the flame stabilization flame of the flame stabilization hole from the plane of the flame outlet increases with the heat intensity of the flame outlet of the main flame hole, resulting in problems such as too high flame burning the heat exchanger, too high combustion noise and exhaust gas index.

[0034] To solve the above problems, the present invention provides a flame stabilization structure for a high-efficiency burner, such as Figure 1 , including a flame hole plate 1, a plurality of main flame holes 2 are opened on the flame hole plate 1. The main flame holes 2 are long strip holes. The plurality of main flame holes 2 are arranged in parallel at intervals. Both sides of the main flame holes 2 are provided with flame stabilization holes 3. The flame stabilization holes 3 are long strip holes parallel to the main flame holes 2. The opening plane of the flame stabilization holes 3 is perpendicular to the opening plane of the main flame holes 2.

[0035] As a preferred implementation mode, a flame stabilization hole baffle 4 is arranged on the flame hole plate 1. A long strip hole is opened on the side of the flame stabilization hole baffle 4 to form the flame stabilization hole 3.

[0036] Specifically, as shown in Figure 3 , the flame stabilization holes 3 between adjacent main flame holes 2 are double-sided flame stabilization holes, formed by a double-sided flame stabilization hole baffle 401. A single-sided flame stabilization hole is arranged on the outside of the outermost flame hole plate 1, formed by a single-sided flame stabilization hole baffle 402. By designing the single-sided flame stabilization hole 3, it is avoided that there is no main flame port on one side of the flame stabilization hole, so that the flame stabilization air-gas mixture causes the flame stabilization gas to flow unevenly due to the small gas resistance on the side without the main flame hole, affecting the flame stabilization effect of the two end main flame holes.

[0037] The flame stabilization holes 3 on the side of the flame stabilization hole baffle 4 are higher than the plane of the flame hole plate 1. The flame stabilization holes 3 are provided with transition rounded corners. To ensure the strength of the flame stabilization holes 3, the part where the flame stabilization holes 3 are higher than the plane of the main flame holes 2 must adopt a transition rounded corner in structure. Avoid cracks in the protruding part of the flame stabilization holes 3 causing the flame stabilization hole baffle plate to fail and the flame stabilization to fail.

[0038] The flame stabilization holes 3 of the present invention are arranged along the length direction of the main flame holes 2, such as Figure 2 , during operation, the gas mainly outputs combustion from the main flame holes 3 of the burner to form a main flame outer flame 5 and a main flame inner flame 6. The stable flames 7 on both sides directly heat the root of the main flame holes 2, so that the propagation speed of the main flame inner flame 6 of the main flame holes 2 is accelerated, and the combustion burns in the air-gas mixture close to the plane of the flame outlet, realizing the stable combustion of the flame. This method of stabilizing the flame by the flame stabilization holes 3 is the perpendicular cross-stabilization of the flame stabilization holes 3 and the main flame holes 2, and the flame stabilization effect is uniform and efficient.

[0039] As a preferred embodiment, the width of the flame stabilizing hole 3 is 0.08 to 0.8 times the width of the main flame hole 2, and the width of the main flame hole 2 is 0.8 - 2.5 mm; the width of the main flame hole 2 is the main structural index for reducing combustion noise. The width of the main flame hole 2 should not be too wide, otherwise combustion defects such as combustion noise and flashback will occur, affecting the flame stabilizing effect and causing an increase in exhaust gas indicators. The gap width changes with the heat load of the main flame hole 2, and the width of the flame stabilizing hole 3 is 0.2 - 0.4 mm.

[0040] The length of the flame stabilizing hole 3 is 60% - 80% of the length of the main flame hole 2. To ensure the flame stabilizing effect of the main flame hole 2, the length of the flame stabilizing hole 3 shall not be greater than the length of the main flame hole 2, so as to ensure the inflow of air required for the combustion of the main flame hole 2. The distance between the edge of the main flame hole 2 and the flame stabilizing hole 3 is 1 to 2 times the width of the main flame hole 2. The distance between the edge of the main flame hole 2 and the flame stabilizing hole 3 directly affects the flame stabilizing effect. Being too far or too close will cause combustion noise and a decrease in the flame stabilizing effect.

[0041] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. An efficient burner flame stabilization structure, characterized in that, It includes a flame hole plate (1), and a plurality of main flame holes (2) are formed in the flame hole plate (1). The main flame holes (2) are long strip-shaped holes, and the plurality of main flame holes (2) are arranged in parallel at intervals. Stabilizing flame holes (3) are arranged on both sides of the main flame holes (2). The stabilizing flame holes (3) are long strip-shaped holes parallel to the main flame holes (2), and the opening plane of the stabilizing flame holes (3) is perpendicular to the opening plane of the main flame holes (2). A stabilizing flame hole baffle (4) is arranged on the flame hole plate (1). A long strip-shaped hole is formed in the side part of the stabilizing flame hole baffle (4) to form the stabilizing flame holes (3). The stabilizing flame holes (3) on the side part of the stabilizing flame hole baffle (4) are higher than the plane of the flame hole plate (1). The stabilizing flame holes (3) between adjacent main flame holes (2) are double-sided stabilizing flame holes. Single-sided stabilizing flame holes are arranged on the outer side of the outermost flame hole plate (1). The stabilizing flame holes (3) are arranged along the length direction of the main flame holes (2), directly heating the root of the main flame holes (2), so that the flame propagation speed of the main flame holes (2) is increased, and the combustion occurs in the air-gas mixed gas close to the fire port plane, realizing the stable combustion of the flame.

2. The high-efficiency burner flame stabilization structure according to claim 1, characterized in that, The stabilizing flame holes (3) are provided with transition rounded corners.

3. An efficient burner flame stabilization structure according to claim 1, characterized in that, The width of the stabilizing flame holes (3) is 0.08 times to 0.8 times the width of the main flame holes (2).

4. An efficient burner flame stabilization structure according to claim 3, characterized in that, The width of the main flame holes (2) is 0.8 - 2.5 mm, and the width of the stabilizing flame holes (3) is 0.2 - 0.5 mm.

5. An efficient burner flame stabilization structure according to claim 1, characterized in that, The length of the stabilizing flame holes (3) is 60% - 80% of the length of the main flame holes (2).

6. The stable flame structure of an efficient burner according to claim 1, characterized in that, The distance between the edge of the main flame holes (2) and the stabilizing flame holes (3) is 1 time to 2 times the width of the main flame holes (2).

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