Splitter wing, splitter module and combustor

Abstract

The application provides a kind of fire dividing wing, fire dividing module and combustor, including fire dividing pedestal, inner ring fire hole structure and outer ring fire hole structure, inner ring fire hole structure includes multiple inner ring fire holes, the included angle between the central axis of inner ring fire hole and the central axis of fire dividing pedestal is first inclination, the included angle between the projection of the central axis of inner ring fire hole on horizontal plane and radius direction is first rotation angle;Outer ring fire hole structure includes multiple outer ring fire holes, the included angle between the central axis of outer ring fire hole and the central axis of fire dividing pedestal is second inclination, the included angle between the projection of the central axis of outer ring fire hole on horizontal plane and radius direction is second rotation angle;The rotation direction of first rotation angle and second rotation angle is same for making the airflow that is ejected from inner and outer ring fire hole structure form same direction rotation and the compound airflow field that diffusion is back to the central axis of fire dividing pedestal.The application can synergistically optimize the angle of fire hole to realize air-fuel fully mixed, flame concentrated and stable, efficient combustion and clean emission.

Description

Technical Field

[0001] This invention relates to the field of combustion equipment technology, and in particular to a flame spreader, a flame spreader module, and a burner. Background Technology

[0002] The burner fin is a key component of a fuel-fired stove burner, and its orifice structure directly determines the injection state and flame shape after the fuel and air are premixed. Currently, traditional burner fin orifices are mostly vertically upward or simply tilted, resulting in a single direction of gas flow. This leads to insufficient mixing of the gas mixture with secondary air, easily causing uneven flame temperature distribution, incomplete combustion, low thermal efficiency, and high levels of harmful emissions such as carbon monoxide (CO) and nitrogen oxides (NOx). Some existing technologies have attempted to improve combustion performance by changing the orifice angle. However, these solutions often only consider a single tilt angle or swirl angle, failing to systematically optimize both. Specifically, setting only a tilt angle can cause the flame to converge inward, reducing heat loss to some extent, but its effect on enhancing gas mixing is limited, making it difficult to achieve complete combustion. Setting only a swirl angle can generate a rotating airflow, using turbulence to enhance the mixing of fuel and air, but the flame tends to diverge, resulting in an uneven heat load and affecting heating efficiency. Furthermore, some existing technologies employ schemes that set the inner and outer ring flame holes in opposite directions. While this scheme can create an annular void at the bottom of the pot to facilitate secondary air replenishment, under combustion conditions, the counter-current flow of the inner and outer rings generates strong shear interference, which is detrimental to the stable anchoring of the flame root. Therefore, how to synergistically optimize the angle of the flame holes to achieve thorough air-fuel mixing, concentrated and stable flame, efficient combustion, and clean emissions has become a pressing technical problem to be solved in this field. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a flame divider, a flame divider module and a burner for synergistically optimizing the angle of the flame holes in order to achieve concentrated and stable flame, sufficient mixing, efficient combustion and clean emissions.

[0004] The above-mentioned objective of this invention can be achieved by the following technical solution: This invention provides a fire-spreading fin, comprising: Fire distribution base; The inner ring flame hole structure includes a plurality of inner ring flame holes spaced apart on the flame distribution base. The angle between the central axis of the inner ring flame hole and the central axis of the flame distribution base is a first tilt angle. The angle between the projection of the central axis of the inner ring flame hole on the horizontal plane and the radial direction of the location of the inner ring flame hole is a first rotation angle. The outer ring flame hole structure includes a plurality of outer ring flame holes disposed around the periphery of the inner ring flame hole structure and spaced apart on the flame distribution base. The angle between the central axis of the outer ring flame hole and the central axis of the flame distribution base is a second tilt angle, and the angle between the projection of the central axis of the outer ring flame hole on the horizontal plane and the radial direction of the location of the outer ring flame hole is a second spiral angle. The first and second swirl angles have the same direction of rotation, which is used to make the airflow ejected from the inner and outer ring fire hole structures form a composite airflow field that rotates in the same direction and diffuses away from the central axis of the fire distribution base.

[0005] In a preferred embodiment of the present invention, the first tilt angle is in the range of 5° to 25°; and / or, the first rotation angle is in the range of 5° to 25°.

[0006] In a preferred embodiment of the present invention, the second tilt angle is in the range of 5° to 25°; and / or, the second helix angle is in the range of 5° to 25°.

[0007] In a preferred embodiment of the present invention, the first tilt angle and the second tilt angle are the same in magnitude; and / or, the first rotation angle and the second rotation angle are the same in magnitude.

[0008] In a preferred embodiment of the present invention, the cross-sectional shape of the inner ring fire hole is one of a circle, an ellipse, or a polygon; and / or, the cross-sectional shape of the outer ring fire hole is one of a circle, an ellipse, or a polygon.

[0009] In a preferred embodiment of the present invention, the inner ring flame hole has a circular cross-sectional shape and a diameter of 12mm-20mm; and / or, the outer ring flame hole has a circular cross-sectional shape and a diameter of 16mm-24mm.

[0010] In a preferred embodiment of the present invention, the diameter of the outer ring flash hole is not less than the diameter of the inner ring flash hole; and / or, the number of outer ring flash holes is not less than the number of inner ring flash holes.

[0011] In a preferred embodiment of the present invention, the ignition base includes an ignition plate, the ignition plate having a first end face and a second end face opposite to each other, and the inner ring ignition hole and the outer ring ignition hole are both through holes penetrating the first end face and the second end face, such that the inner ring ignition hole and the outer ring ignition hole have the same height.

[0012] The present invention also provides a flame distribution module, comprising a plurality of stacked flame distribution wings as described above. Adjacent flame distribution wings are circumferentially rotatable and adjustable. The inner ring flame holes of adjacent flame distribution wings are interconnected to form an inner ring channel, and the outer ring flame holes of adjacent flame distribution wings are interconnected to form an outer ring channel. By circumferentially rotating each flame distribution wing, the flow area of ​​the inner ring channel and the flow area of ​​the outer ring channel can be adjusted.

[0013] The present invention also provides a burner including the aforementioned flame spreader.

[0014] The technical solution of the present invention has the following significant beneficial effects: The flame spreader described in this invention optimizes the rotation and tilt angles of the inner and outer ring flame holes, ensuring that the exhaust gases from both holes carry a tangential velocity component and diffuse away from the central axis of the flame spreader base. This creates a rotating and outwardly diffusing composite airflow field. Under this composite airflow field, the flame root is stably anchored near the flame hole outlet, resulting in a concentrated and stable flame shape. This effectively reduces heat loss caused by flame drift and improves combustion efficiency. Furthermore, the composite airflow field generates a strong unidirectional rotating airflow in the combustion chamber, greatly promoting secondary mixing of the exhaust gas and surrounding air. This ensures thorough air-fuel mixing, leading to more efficient combustion and complete combustion. It fundamentally solves the problem of insufficient air-fuel mixing and incomplete combustion caused by the single tilt or rotation angle of traditional flame spreaders. This reduces the emissions of harmful pollutants such as carbon monoxide and nitrogen oxides caused by localized oxygen deficiency or incomplete combustion, thus contributing to cleaner emissions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0017] Figure 1 This is a three-dimensional structural diagram of one embodiment of the fire-spreading fins described in this invention; Figure 2 This is a side sectional view of one embodiment of the fire-spreading fins described in this invention; Figure 3 This is a top view of one embodiment of the fire-spreading fins described in this invention.

[0018] The reference numerals in the above figures are as follows: a. First tilt angle b. First helix angle; c. Second inclination angle; d. Second helix angle; 100. Flame distribution base; 110. First end face; 120. Second end face; 200. Inner ring fire hole structure; 210. Inner ring fire hole; 300, outer ring fire hole structure; 310, outer ring fire hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Implementation Method 1

[0021] Please refer to the following: Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a flame spreader, which includes a flame spreader base 100, an inner ring flame hole structure 200, and an outer ring flame hole structure 300. The inner ring flame hole structure 200 includes a plurality of inner ring flame holes 210 spaced around the flame spreader base 100. The angle between the central axis of the inner ring flame hole 210 and the central axis of the flame spreader base 100 is a first tilt angle α, and the angle between the projection of the central axis of the inner ring flame hole 210 onto the horizontal plane and the radial direction of the location of the inner ring flame hole 210 is a first spiral angle b. The outer ring flame hole structure 300 includes a flame spreader base 100, an inner ring flame hole structure 200, and an outer ring flame hole structure 300. Multiple outer ring flame holes 310 are arranged around the periphery of the flame hole structure 200 and spaced around the flame base 100. The angle between the central axis of the outer ring flame hole 310 and the central axis of the flame base 100 is a second inclination angle c. The angle between the projection of the central axis of the outer ring flame hole 310 on the horizontal plane and the radial direction of the location of the outer ring flame hole 310 is a second rotation angle d. The first rotation angle b and the second rotation angle d have the same rotation direction, which are used to make the airflow ejected from the inner ring flame hole structure 200 and the outer ring flame hole structure 300 form a composite airflow field that rotates in the same direction and diffuses away from the central axis of the flame base 100.

[0022] Overall, this flame spreader optimizes the rotation and tilt angles of the inner and outer ring flame holes 210 and 310, ensuring that the exhaust gases from both holes carry tangential velocity components and diffuse away from the central axis of the flame spreader base 100. This creates a rotating and outwardly diffusing composite airflow field. Under this composite airflow field, the flame root is stably anchored near the flame hole outlet, resulting in a concentrated and stable flame shape. This effectively reduces heat loss caused by flame drift and improves combustion efficiency. Furthermore, the composite airflow field generates a strong unidirectional rotating airflow in the combustion chamber, greatly promoting secondary mixing of the exhaust gas and surrounding air. This ensures thorough air-fuel mixing, leading to more efficient combustion and complete combustion. It fundamentally solves the problem of insufficient air-fuel mixing and incomplete combustion caused by the single tilt or rotation angle of traditional flame spreaders, reducing emissions of harmful pollutants such as carbon monoxide and nitrogen oxides caused by localized oxygen deficiency or incomplete combustion, thus contributing to cleaner emissions.

[0023] The radius direction of the inner ring flame hole 210 is the direction of the line connecting the center of the flame base 100 and the center of the inner ring flame hole 210; the radius direction of the outer ring flame hole 310 is the direction of the line connecting the center of the flame base 100 and the center of the outer ring flame hole 310.

[0024] In embodiments of the present invention, the first tilt angle α ranges from 5° to 25°; and / or, the first helix angle b ranges from 5° to 25°.

[0025] Specifically, the first tilt angle 'a' ranges from 5° to 25°, and the first swirl angle 'b' also ranges from 5° to 25°. By limiting the range of the first tilt angle 'a', if the tilt angle is less than 5°, the outward diffusion effect is insufficient, and the flame remains relatively concentrated; if the tilt angle is greater than 25°, the airflow is too outwardly tilted, easily causing the flame to detach from the heating zone at the bottom of the pot. By limiting the range of the first swirl angle 'b', sufficient rotational mixing intensity can be generated without excessive flame dispersion due to excessive swirl.

[0026] In embodiments of the present invention, the second tilt angle c ranges from 5° to 25°; and / or, the second helix angle d ranges from 5° to 25°.

[0027] Specifically, the second tilt angle c ranges from 5° to 25°, and the second swirl angle d also ranges from 5° to 25°. By limiting the range of the second tilt angle c, if the tilt angle is less than 5°, the outward diffusion effect is insufficient, and the flame remains relatively concentrated; if the tilt angle is greater than 25°, the airflow is too outwardly tilted, which can easily cause the flame to detach from the heating zone at the bottom of the pot. By limiting the range of the second swirl angle d, sufficient rotational mixing intensity can be generated without excessive flame dispersion due to excessive swirl.

[0028] Furthermore, by making the parameter range of the outer ring flame hole 310 consistent with that of the inner ring flame hole 310, the outer ring flame and the inner ring flame have similar flow characteristics. The inner and outer ring airflows can cooperate in the same spatial scale, avoiding airflow shearing or flame stratification due to excessive angle differences.

[0029] In embodiments of the present invention, the first tilt angle a and the second tilt angle c are the same; and / or, the first helix angle b and the second helix angle d are the same.

[0030] Preferably, the first tilt angle a and the second tilt angle c are the same size, and the first helix angle b and the second helix angle d are the same size. For example, they can all be set to 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20° or other values.

[0031] More preferably, the first tilt angle α is 15° and the first rotation angle b is 15°. Furthermore, the second tilt angle c is 15° and the second rotation angle d is 15°.

[0032] Experimental measurements showed that, at these values, the outward diffusion and rotational mixing of the inner ring flame reached optimal balance. Simultaneously, at these values, the outward diffusion and rotational mixing of the outer ring flame also reached optimal balance.

[0033] By making the first tilt angle a, the second tilt angle c, the first swirl angle b and the second swirl angle d the same, the central axes of the inner ring flame hole 210 and the outer ring flame hole 310 have completely consistent tilt and rotation orientation in space. The airflow ejected from the inner ring and the outer ring is as if it is emitted from a unified "swirling generator", which reduces the mutual interference between the inner and outer ring flames and improves the combustion stability.

[0034] In embodiments of the present invention, designers may adjust the cross-sectional shape of the inner ring fire hole 210 and the outer ring fire hole 310 according to usage needs, without making specific limitations.

[0035] For example, the cross-sectional shape of the inner ring burner 210 is one of a circle, an ellipse, or a polygon; and / or, the cross-sectional shape of the outer ring burner 310 is one of a circle, an ellipse, or a polygon. The cross-sectional shape of the burner, depending on its shape, affects the airflow distribution and jet characteristics. The specific cross-sectional shape of the burner can be flexibly selected according to different burner models and power requirements, and no specific restrictions are imposed here.

[0036] Preferably, the cross-sectional shape of the inner ring fire hole 210 is one of a circle, an ellipse, or a polygon; and the cross-sectional shape of the outer ring fire hole 310 is one of a circle, an ellipse, a waist shape, or a polygon.

[0037] In one feasible embodiment, the cross-sectional shape of the inner ring flame hole 210 is circular, and the diameter of the inner ring flame hole 210 is 12mm-20mm; for example, the diameter of the inner ring flame hole 210 can be 12mm, 14mm, 16mm, 18mm, 20mm or other values.

[0038] Furthermore, the outer ring flame hole 310 has a circular cross-sectional shape, and its diameter is 16mm-24mm. For example, the diameter of the outer ring flame hole 310 can be 16mm, 18mm, 20mm, 22mm, 24mm or other values.

[0039] In embodiments of the present invention, the diameter of the outer ring fire hole 310 is not less than the diameter of the inner ring fire hole 210; and / or, the number of outer ring fire holes 310 is not less than the number of inner ring fire holes 210.

[0040] Preferably, the diameter of the outer ring flame hole 310 is larger than the diameter of the inner ring flame hole 210; and the number of outer ring flame holes 310 is greater than the number of inner ring flame holes 210.

[0041] By ensuring that the diameter of the outer ring burner orifice 310 is not less than the diameter of the inner ring burner orifice 210, the inner ring burner orifice 210, with its smaller diameter, is suitable for maintaining a stable small flame; while the outer ring burner orifice 310, with its larger diameter, can provide the large flow of fuel gas required for main combustion. This differentiated design of the diameters of the inner ring burner orifice 210 and the outer ring burner orifice 310 helps to achieve gradient combustion from the center to the periphery, improving overall combustion efficiency.

[0042] Designers can adjust the specific number of inner ring flame holes 210 and outer ring flame holes 310 according to usage needs, without specifying any numerical limits. For example, the inner ring flame holes 210 can be set to 8, and the outer ring flame holes 310 can be set to 12.

[0043] In an embodiment of the present invention, the ignition base 100 includes an ignition plate, which has a first end face 110 and a second end face 120 opposite to each other. The inner ring ignition hole 210 and the outer ring ignition hole 310 are both through holes that penetrate the first end face 110 and the second end face 120, so that the inner ring ignition hole 210 and the outer ring ignition hole 310 have the same height.

[0044] By setting the inner ring flame hole 210 and the outer ring flame hole 310 between the first end face 110 and the second end face 120, the inner ring flame hole 210 and the outer ring flame hole 310 have the same height, thereby forming roughly the same flame hole flow channel. This makes the flow resistance of each flame hole balanced, avoids uneven airflow distribution caused by differences in flow channel length, and thus ensures that the inner and outer ring flame height and flame shape are consistent.

[0045] Designers can adjust the shape, material, and thickness of the flame distribution plate according to usage requirements, without specific limitations. In one feasible embodiment, the flame distribution plate is a circular disc structure made of heat-resistant metal. The flame distribution plate has concentric spacers with an inner ring flame hole structure 200 and an outer ring flame hole structure 300. The inner ring flame hole structure 200 is located near the center, and the outer ring flame hole structure 300 is located around the inner ring flame hole structure 200.

[0046] In the expandable design, the inner ring burner structure 200 can be configured with multiple rings arranged at intervals from the inside out. The outer ring burner structure 300 can also be configured with multiple rings arranged at intervals from the inside out. By coordinating the multiple rings of inner ring burner structure 200 and outer ring burner structure 300, the combustion performance can be adjusted, resulting in greater flexibility in use.

[0047] Implementation Method 2

[0048] An embodiment of the present invention provides a flame distribution module, which includes a plurality of stacked flame distribution wings as described in Embodiment 1. Adjacent flame distribution wings are circumferentially rotatable and adjustable. The inner ring flame holes 210 of adjacent flame distribution wings are interconnected to form an inner ring channel, and the outer ring flame holes 310 of adjacent flame distribution wings are interconnected to form an outer ring channel. By circumferentially rotating each flame distribution wing, the flow area of ​​the inner ring channel and the flow area of ​​the outer ring channel can be adjusted.

[0049] The specific structure and beneficial effects of the flame spreader are the same as those described in Implementation Method 1, and will not be repeated here. A flame spreader module is constructed by multiple stacked flame spreaders. By rotating each flame spreader, the overlap of the flame holes can be changed to adjust the effective flow area of ​​the inner and outer ring channels, thereby regulating the gas flow rate and flame size, achieving stepless flame adjustment. This significantly improves the versatility and flexibility of the flame spreader module, enabling the same module to adapt to different power and gas types.

[0050] Implementation Method 3

[0051] An embodiment of the present invention provides a burner including a flame spreader as described in Embodiment 1. The specific structure and beneficial effects of the flame spreader are the same as those described in Embodiment 1, and will not be repeated here.

[0052] Designers can adjust the specific type of burner according to usage needs, and no specific restrictions are imposed here. For example, the burner is a fuel oil stove burner.

[0053] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of “a” or “an” to describe an element, component, part, or step is not intended to exclude other elements, components, parts, or steps.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A type of fire-spreading wing, characterized in that, include: Fire distribution base; The inner ring flame hole structure includes a plurality of inner ring flame holes spaced apart on the flame distribution base. The angle between the central axis of the inner ring flame hole and the central axis of the flame distribution base is a first tilt angle. The angle between the projection of the central axis of the inner ring flame hole on the horizontal plane and the radial direction of the location of the inner ring flame hole is a first rotation angle. The outer ring flame hole structure includes a plurality of outer ring flame holes disposed around the periphery of the inner ring flame hole structure and spaced apart on the flame distribution base. The angle between the central axis of the outer ring flame hole and the central axis of the flame distribution base is a second tilt angle, and the angle between the projection of the central axis of the outer ring flame hole on the horizontal plane and the radial direction of the location of the outer ring flame hole is a second spiral angle. The first and second swirl angles have the same direction of rotation, which is used to make the airflow ejected from the inner and outer ring fire hole structures form a composite airflow field that rotates in the same direction and diffuses away from the central axis of the fire distribution base.

2. The fire-spreading fin as described in claim 1, characterized in that, The first tilt angle ranges from 5° to 25°; and / or, the first rotation angle ranges from 5° to 25°.

3. The fire-spreading fin as described in claim 1, characterized in that, The second tilt angle ranges from 5° to 25°; and / or, the second helix angle ranges from 5° to 25°.

4. The fire-spreading fin as described in claim 2, characterized in that, The first tilt angle is the same as the second tilt angle; and / or, the first rotation angle is the same as the second rotation angle.

5. The fire-spreading fin as described in claim 1, characterized in that, The cross-sectional shape of the inner ring fire hole is one of a circle, an ellipse, or a polygon; and / or, the cross-sectional shape of the outer ring fire hole is one of a circle, an ellipse, or a polygon.

6. The fire-spreading fin as described in claim 5, characterized in that, The inner ring flame hole has a circular cross-sectional shape and a diameter of 12mm-20mm; and / or, the outer ring flame hole has a circular cross-sectional shape and a diameter of 16mm-24mm.

7. The fire-spreading fin as described in claim 6, characterized in that, The diameter of the outer ring fire hole is not less than the diameter of the inner ring fire hole; and / or, the number of outer ring fire holes is not less than the number of inner ring fire holes.

8. The fire-spreading fin as described in claim 4, characterized in that, The ignition base includes an ignition plate, which has a first end face and a second end face. The inner ring ignition hole and the outer ring ignition hole are both through holes that penetrate the first end face and the second end face, so that the inner ring ignition hole and the outer ring ignition hole have the same height.

9. A fire distribution module, characterized in that, The device includes multiple stacked flame spreaders as described in any one of claims 1 to 8. Adjacent flame spreaders are circumferentially rotatable and adjustable. The inner ring flame holes of adjacent flame spreaders are interconnected to form an inner ring channel, and the outer ring flame holes of adjacent flame spreaders are interconnected to form an outer ring channel. By circumferentially rotating each flame spreader, the flow area of ​​the inner ring channel and the flow area of ​​the outer ring channel can be adjusted.

10. A burner, characterized in that, Includes the fire-spreading wings as described in any one of claims 1 to 8.

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