阅读说明：本技术 一种高效燃烧器稳焰结构 (Flame stabilizing structure of efficient combustor ) 是由 杜一鸣 于 2021-08-09 设计创作，主要内容包括：本发明涉及一种高效燃烧器稳焰结构,包括火孔板,所述火孔板上开设多个主火孔,所述主火孔为长条形孔,多个主火孔按间隔平行设置,所述主火孔的两侧设有稳焰孔,所述稳焰孔为平行于所述主火孔的长条形孔,所述火孔板的开口平面与所述主火孔的开口平面相垂直。本发明稳焰孔是沿主火孔长度方向设置,直接加热主火孔根部,使主火孔的火焰传播速度加快,燃烧在空气-燃气混合气体贴近火口平面燃烧,实现了火焰的稳定燃烧。本发明稳焰孔稳焰方法为稳焰孔与主火孔垂直交叉稳焰,稳焰效果均匀,高效。(The invention relates to a flame stabilizing structure of an efficient combustor, which comprises a fire hole plate, wherein a plurality of main fire holes are formed in the fire hole plate, the main fire holes are long strip-shaped holes, the main fire holes are arranged in parallel at intervals, flame stabilizing holes are arranged on two sides of the main fire holes, the flame stabilizing holes are long strip-shaped holes parallel to the main fire holes, and the opening plane of the fire hole plate is perpendicular to the opening plane of the main fire holes. The flame stabilizing holes are arranged along the length direction of the main fire hole, the root parts of the main fire hole are directly heated, the flame propagation speed of the main fire hole is accelerated, and the flame is combusted when the air-gas mixed gas is close to the plane of the fire hole, so that the stable combustion of the flame is realized. The flame stabilizing method of the flame stabilizing hole of the invention is to vertically cross the flame stabilizing hole and the main flame hole to stabilize the flame, and the flame stabilizing effect is uniform and efficient.)

1. A flame stabilizing structure of a high-efficiency combustor is characterized by comprising a fire hole plate (1), wherein a plurality of main fire holes (2) are formed in the fire hole plate (1), the main fire holes (2) are strip-shaped holes, the main fire holes (2) are arranged in parallel at intervals,

the two sides of the main fire hole (2) are provided with flame stabilizing holes (3), the flame stabilizing holes (3) are strip-shaped holes parallel to the main fire hole (2), and the opening plane of the fire hole plate (1) is perpendicular to the opening plane of the main fire hole (2).

2. The flame stabilizing structure of the efficient burner according to claim 1, wherein a flame stabilizing hole baffle plate (4) is arranged on the fire hole plate (1), and a long-strip-shaped hole is formed in the side part of the flame stabilizing hole baffle plate (4) to form the flame stabilizing hole (3).

3. A high efficiency burner flame holding structure as claimed in claim 2, wherein the flame holding holes (3) between the adjacent main flame holes (2) are bilateral flame holding holes.

4. A high efficiency burner flame holding structure as claimed in claim 2, wherein the outer side of the fire hole plate (1) at the outermost side is provided with a single side flame holding hole.

5. A high-efficiency burner flame stabilizing structure according to any one of claims 2 to 4, characterized in that the flame stabilizing holes (3) at the side of the flame stabilizing hole baffle plate (4) are higher than the plane of the flame hole plate (1).

6. A high-efficiency burner flame holding structure as claimed in claim 5, characterized in that the flame holding holes (3) are arranged with transition fillets.

7. A high efficiency burner flame holding structure as defined in claim 1, wherein the width of the flame holding holes (3) is 0.08 to 0.8 times the width of the main flame holes (2).

8. A high efficiency burner flame holding structure as defined in claim 7, wherein the width of the main flame holes (2) is 0.8-2.5mm, and the width of the flame holding holes (3) is 0.2-0.5 mm.

9. A high efficiency burner flame holding structure as claimed in claim 1, wherein the length of the flame holding hole (3) is 60-80% of the length of the main flame hole (2).

10. A high efficiency burner flame holding structure as defined in claim 1, wherein the distance between the main flame hole (2) and the edge of the flame holding hole (3) is 1 to 2 times the width of the main flame hole (2).

Technical Field

The invention relates to the technical field of combustors, in particular to a flame stabilizing structure of an efficient combustor.

Background

At present, the market competition of the burner and the wall-mounted boiler is intense, and various manufacturers reduce the cost to improve the market competition. The requirements for the combustor are small volume and large heat load, and because the original combustor is designed according to a certain combustion intensity, if the heat load is increased (about 25-40%), the normal combustion of the combustor is greatly influenced.

The main fire hole of the burner is the main fire hole for gas output and combustion. When the heat load is close to the maximum fire hole heat intensity, the flame is separated from the flame, jumps, shifts and the like due to factors such as the flow rate of the air-gas mixture, the mixing ratio and the like. The stability of the burner flame is very much related to the way the flame is stabilized. In a common flame stabilizing mode, flame stabilizing holes are arranged around a main flame hole of a burner, so that the combustion direction of flame is parallel to the main flame hole, and the flame diffusion of the flame stabilizing holes is relied to heat the root of the flame of the main flame hole to play a role in stabilizing flame.

The parallel type small hole flame stabilization (as shown in fig. 4) which is commonly adopted at present has poor flame stabilization effect. The distance between the flame stabilizing flame of the flame stabilizing hole and the plane of the fire hole is increased along with the thermal strength of the fire hole of the main fire hole. The problems of over-high flame burning of the heat exchanger, over-high combustion noise, over-high exhaust gas index and the like generally occur.

Disclosure of Invention

The invention aims to solve the problems, provides a flame stabilizing structure of an efficient combustor, provides a crossed type strip-shaped flame stabilizing structure and obtains a very good flame stabilizing effect.

The purpose of the invention is realized by the following technical scheme:

a flame stabilizing structure of a high-efficiency burner comprises a fire hole plate, wherein a plurality of main fire holes are formed in the fire hole plate, the main fire holes are strip-shaped holes, the main fire holes are arranged in parallel at intervals,

the two sides of the main fire hole are provided with flame stabilizing holes which are long strip-shaped holes parallel to the main fire hole, and the opening plane of the fire hole plate is perpendicular to the opening plane of the main fire hole.

The flame stabilizing holes are arranged along the length direction of the main fire hole, the root parts of the main fire hole are directly heated, the flame propagation speed of the main fire hole is accelerated, and the flame is combusted when the air-gas mixed gas is close to the plane of the fire hole, so that the stable combustion of the flame is realized. The flame stabilizing method of the flame stabilizing hole of the invention is to vertically cross the flame stabilizing hole and the main flame hole to stabilize the flame, and the flame stabilizing effect is uniform and efficient.

Preferably, a flame stabilizing hole baffle plate is arranged on the fire hole plate, and a long-strip-shaped hole is formed in the side part of the flame stabilizing hole baffle plate to form the flame stabilizing hole.

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

Preferably, the outer side of the fire hole plate at the outermost side is provided with a single-side flame stabilizing hole. In order to ensure the flame stabilizing effect of the main flame holes at the two ends of the burner, the flame stabilizing holes with single-sided flame stabilization are specially designed at the two ends, so that the phenomenon that the flame stabilizing effect of the main flame holes at the two ends is influenced because the flame stabilizing air-gas mixed gas has small gas resistance at one side without the main flame holes because the single side of the flame stabilizing holes has no main flame ports is avoided.

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

Preferably, the flame stabilizing holes are arranged by adopting transition fillets. The strength of the flame stabilizing hole is ensured, and the part of the flame stabilizing hole, which is higher than the plane of the main flame hole, adopts a transition fillet in structure. The failure of the flame stabilizing hole baffle plate caused by the crack of the protruded part of the flame stabilizing hole is avoided, and the flame stabilizing failure is formed.

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

Preferably, the width of the main fire hole is 0.8-2.5 mm; the width of the main fire hole is a main structural index for reducing combustion noise, the width of the main fire hole is not too wide, otherwise combustion defects such as combustion noise and tempering can occur, the flame stabilizing effect is affected, and the exhaust gas index is increased.

Preferably, the width of the flame stabilizing hole is 0.2-0.5 mm. The gap width is changed according to the heat load of the main fire hole.

Preferably, the length of the flame stabilizing hole is 60-80% of the length of the main fire hole. In order to ensure the flame stabilizing effect of the main fire hole, the length of the flame stabilizing hole must not be greater than that of the main fire hole, so as to ensure the inflow of air required for the main fire hole during combustion.

Preferably, the distance between the main fire hole and the edge of the flame-stabilizing hole is 1 to 2 times of the width of the main fire hole. The distance between the main fire hole and the edge of the flame stabilizing hole directly influences the flame stabilizing effect, and the combustion noise and the flame stabilizing effect are reduced due to the fact that the main fire hole is too far away and too close to the flame stabilizing hole.

Compared with the prior art, the invention has the following advantages:

1. the flame stabilizing holes are arranged along the length direction of the main fire hole, the root parts of the main fire hole are directly heated, the flame propagation speed of the main fire hole is accelerated, and the flame is combusted when the air-gas mixed gas is close to the plane of the fire hole, so that the stable combustion of the flame is realized. The flame stabilizing method of the flame stabilizing hole of the invention is to vertically cross the flame stabilizing hole and the main flame hole to stabilize the flame, and the flame stabilizing effect is uniform and efficient.

2. In order to ensure the flame stabilizing effect of the main flame holes at the two ends of the burner, the flame stabilizing holes with single-sided flame stabilization are specially designed at the two ends, so that the phenomenon that the flame stabilizing effect of the main flame holes at the two ends is influenced because the flame stabilizing air-gas mixed gas has small gas resistance at one side without the main flame holes because the single side of the flame stabilizing holes has no main flame ports is avoided.

3. In order to ensure the strength of the flame stabilizing holes, transition fillets are adopted on the structures of the flame stabilizing holes higher than the plane of the main flame hole. The failure of the flame stabilizing hole baffle plate caused by the crack of the protruded part of the flame stabilizing hole is avoided, and the flame stabilizing failure is formed.

4. The width of the main fire hole is a main structural index for reducing combustion noise, the width of the main fire hole is not too wide, otherwise combustion defects such as combustion noise and tempering occur, the flame stabilizing effect is influenced, and the waste gas index is increased, and experiments prove that the width of the main fire hole is 0.8-2.5 mm.

5. In order to ensure the flame stabilizing effect of the main fire hole, the length of the flame stabilizing hole is not greater than that of the main fire hole so as to ensure the inflow of air required by the main fire hole during combustion, and the length of the flame stabilizing hole is 60-80% of that of the main fire hole.

6. The distance between the main fire hole and the edge of the flame stabilizing hole directly influences the flame stabilizing effect, and the distance between the main fire hole and the edge of the flame stabilizing hole is 1-2 times of the width of the main fire hole through experimental determination.

Drawings

FIG. 1 is a schematic view of a flame holding structure of the high efficiency burner of the present invention;

FIG. 2 is a schematic diagram of the flame holding of the high efficiency burner of the present invention;

FIG. 3 is a top view of a flame holding structure of the high efficiency burner of the present invention;

FIG. 4 is a top view of a flame holding structure of a conventional high efficiency burner;

in the figure: the flame-stabilizing hole plate comprises a flame hole plate 1, a main flame hole 2, a flame-stabilizing hole 3, a flame-stabilizing hole baffle plate 4, a double-side flame-stabilizing hole baffle plate 401, a single-side flame-stabilizing hole baffle plate 402, a main flame outer flame 5, a main flame inner flame 6 and a stable flame 7.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Fig. 4 is a top view of a flame stabilizing structure of an existing high-efficiency burner, which adopts a parallel small-hole flame stabilizer, wherein a plurality of small-hole flame stabilizers 3 'are arranged on two sides of a main fire hole 2', the flame stabilizing effect is poor, the distance between the flame stabilizer flame of the flame stabilizer hole and the plane of a fire hole is increased along with the thermal strength of the fire hole of the main fire hole, and the problems of overhigh flame heat exchanger, overhigh combustion noise and waste gas index and the like occur.

In order to solve the above problems, the present invention provides a flame stabilizing structure of an efficient burner, as shown in fig. 1, which includes a fire hole plate 1, wherein the fire hole plate 1 is provided with a plurality of main fire holes 2, the main fire holes 2 are strip-shaped holes, the main fire holes 2 are arranged in parallel at intervals, two sides of the main fire holes 2 are provided with flame stabilizing holes 3, the flame stabilizing holes 3 are strip-shaped holes parallel to the main fire holes 2, and an opening plane of the fire hole plate 1 is perpendicular to an opening plane of the main fire holes 2.

In a preferred embodiment, the fire hole plate 1 is provided with a flame hole stabilizing baffle 4, and the side part of the flame hole stabilizing baffle 4 is provided with a strip-shaped hole to form a flame hole 3.

Specifically, as shown in fig. 3, the flame stabilizing holes 3 between the adjacent main flame holes 2 are bilateral flame stabilizing holes and are formed by bilateral flame stabilizing hole baffles 401, the lateral side of the outermost flame hole plate 1 is provided with a unilateral flame stabilizing hole, and the lateral side is formed by a lateral flame stabilizing hole baffle 402, so that by designing the unilateral flame stabilizing hole 3, the unilateral absence of a main burner in the flame stabilizing hole is avoided, and the mixed gas of the flame stabilizing air and the gas causes the bias flow of the flame stabilizing gas due to the small gas resistance on one side without the main flame hole, thereby affecting the flame stabilizing effect of the main flame holes at the two ends.

The flame stabilizing holes 3 on the side part of the flame stabilizing hole baffle 4 are higher than the plane of the flame outlet plate 1, and the flame stabilizing holes 3 are arranged by adopting transition fillets. In order to ensure the strength of the flame stabilizing holes 3, transition fillets are adopted on the structure of the flame stabilizing holes 3 higher than the plane of the main flame holes 2. The failure of the flow baffle plate of the flame stabilizing hole 3 caused by the crack at the convex part of the flame stabilizing hole 3 is avoided, and the flame stabilizing failure is formed.

According to the invention, the flame stabilizing holes 3 are arranged along the length direction of the main flame hole 2, as shown in figure 2, when the burner works, fuel gas is mainly output from the main flame hole 3 of the burner to be combusted to form a main flame outer flame 5 and a main flame inner flame 6, the stable flames 7 on two sides directly heat the root part of the main flame hole 2, so that the propagation speed of the main flame inner flame 6 of the main flame hole 2 is accelerated, the combustion is carried out on the air-fuel gas mixed gas close to the plane of a fire hole, and the stable combustion of the flame is realized, and the flame stabilizing method of the flame stabilizing holes 3 is that the flame stabilizing holes 3 and the main flame hole 2 are vertically crossed to stabilize the flame, and the flame stabilizing effect is uniform and efficient.

In a preferred embodiment, the width of the flame stabilizing hole 3 is 0.08 to 0.8 times of the width of the main fire hole 2, and the width of the main fire hole 2 is 0.8 to 2.5 mm; the width of the main fire hole 2 is a main structural index for reducing combustion noise, the width of the main fire hole 2 is not too wide, otherwise combustion defects such as combustion noise and tempering can occur, the flame stabilizing effect is affected, and the exhaust gas index is increased. The width of the gap is changed according to the heat load of the main fire hole 2, and the width of the flame stabilizing hole 3 is 0.2-0.4 mm.

The length of the flame stabilizing hole 3 is 60-80% of the length of the main fire hole 2. In order to ensure the flame stabilizing effect of the main fire hole 2, the length of the flame stabilizing hole 3 should not be greater than that of the main fire hole 2 so as to ensure the inflow of air required by the main fire hole 2 during combustion, and the distance between the main fire hole 2 and the edge of the flame stabilizing hole 3 is 1 to 2 times the width of the main fire hole 2. The distance between the main fire hole 2 and the edge of the flame stabilizing hole 3 directly influences the flame stabilizing effect, and the combustion noise and the flame stabilizing effect are reduced due to the fact that the main fire hole is too far away and too close.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.