Combustor center fuel supply structure

Abstract

The invention provides a combustor center fuel supply structure, and relates to the technical field of combustors, in order to solve the problem that flames of combustors in the prior art are uneven, the combustor center fuel supply structure comprises a combustion chamber, a flame detection sensor and a fuel outlet, the flame detection sensor is arranged in the center of the combustion chamber, and the fuel outlet is arranged in the combustion chamber. And the fuel outlets surround the flame detection sensor and are uniformly distributed around the flame detection sensor. Due to the fact that the flame detection sensor is arranged at the geometric center position of the cross section of the combustion chamber and located on the inner side surrounded by the fuel outlet, the influence of flowing turbulence on smoke and combustion airflow is avoided, flames are more uniform, and the heating effect is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a burner center fuel supply structure. BACKGROUND

[0002] A burner is a device that converts the chemical energy of fuel into heat energy through combustion. Generally, the burner is provided with a fuel supply device to send fuel to the combustion chamber and be ignited to burn and release heat energy; at the same time, in order to ensure the safety of combustion and the burner, avoid the accumulation of unburned fuel after the burner is extinguished, and cause deflagration or explosion when it is ignited again, endangering personal and equipment safety, a flame detection device is needed to monitor the flame in real time, and the fuel supply is closed when the flame is extinguished to ensure safety.

[0003] The fuel outlet of the fuel supply device and the flame detection sensor of the flame detection device are usually arranged in the combustion chamber of the burner. Since there is only one geometric center in the cross section of the combustion chamber, the interference of the components arranged at the non-geometric center of the cross section of the combustion chamber with the flame, air flow, etc. of the combustion field will cause the flow field of the flame, combustion air, flue gas, etc. of the combustion field to be uneven and disordered, resulting in phenomena such as flame deflection and discontinuous flame, which will cause the heat absorption of the heated equipment to be uneven and affect the use effect.

[0004] In order to ensure efficient and complete combustion of fuel and avoid incomplete combustion caused by flame deflection and uneven heating of the heated equipment, the fuel outlet of the fuel supply device is usually arranged at the geometric center of the cross section of the combustion chamber. Common fuel outlets of the fuel supply device include fuel holes and fuel nozzles. The flame detection device usually includes a flame detection sensor and a flame detection signal conversion-processing circuit or device. In the prior art, since the fuel outlet is arranged at the geometric center of the cross section of the combustion chamber, the flame detection sensor can only be arranged at a position deviating from the geometric center of the cross section of the combustion chamber. The flame detection sensor arranged at a position deviating from the geometric center of the cross section of the combustion chamber interferes with the propagation of the flame of the combustion field, and causes the flow of combustion air and flue gas to be disordered, further deteriorating the uniformity of the flame field, resulting in the defects of flame deflection and uneven heating of the heated equipment. SUMMARY

[0005] The present application aims to provide a burner center fuel supply structure to solve the problem of uneven flame of the burner in the prior art. The burner center fuel supply structure of the present application can effectively avoid the influence of flow disorder on flue gas and combustion air flow, make the flame more uniform, and make the heating effect more stable.

[0006] The present invention provides a burner center fuel supply structure, including a combustion chamber, a flame detection sensor and a fuel outlet. The flame detection sensor is disposed at the center of the combustion chamber, and the fuel outlet surrounds the flame detection sensor and is evenly distributed around the flame detection sensor.

[0007] As a preferred embodiment of the present invention, the combustion chamber has a cylindrical or conical structure, the flame detection sensor is disposed at the center of the combustion chamber, and the center point around which the fuel outlet is located is at the center of the combustion chamber.

[0008] As a preferred embodiment of the present invention, a plurality of air inlets for air intake are provided around the combustion chamber, the plurality of air inlets being evenly distributed around the combustion chamber and located outside the fuel outlet.

[0009] As a preferred embodiment of the present invention, a fuel sleeve is provided in the combustion chamber, the fuel sleeve is sleeved on the outside of the flame detection sensor and is coaxially arranged with the flame detection sensor, and the fuel outlet is formed between the fuel sleeve and the flame detection sensor.

[0010] As a preferred embodiment of the present invention, an annular fuel outlet is provided at the bottom of the combustion chamber, and the fuel outlet is arranged around the base of the flame detection sensor.

[0011] As a preferred embodiment of the present invention, a plurality of grooves are uniformly arranged around the fuel outlet, the grooves being connected to the fuel outlet and recessed relative to the bottom plate of the combustion chamber.

[0012] As a preferred embodiment of the present invention, the fuel outlet is a plurality of elongated slit holes, which are evenly distributed around the flame detection sensor and arranged in a divergent pattern outward from the flame detection sensor as the center.

[0013] As a preferred embodiment of the present invention, a first inclined surface is provided at the bottom of the combustion chamber. The first inclined surface is conical in shape and is inclined upward from the inside to the outside. A plurality of the slit holes are distributed on the first inclined surface.

[0014] As a preferred embodiment of the present invention, a second inclined surface is provided at the bottom of the combustion chamber. The second inclined surface is conical in shape and is inclined upward from the inside to the outside. The inner side of the second inclined surface is connected to the outer side of the first inclined surface. The air inlet holes are evenly arranged on the second inclined surface.

[0015] As a preferred embodiment of the present invention, the inclination of the second inclined plane is greater than that of the first inclined plane.

[0016] Compared with the prior art, the present invention has the following positive effects: The burner central fuel supply structure provided by this invention includes a combustion chamber, a flame detection sensor, and a fuel outlet. The flame detection sensor is located at the center of the combustion chamber, and the fuel outlet surrounds and is uniformly distributed around the flame detection sensor. This burner central fuel supply structure places both the fuel outlet and the flame detection sensor at the geometric center of the combustion chamber's cross-section. Fuel enters the combustion chamber through the fuel outlet, is ignited, and burns. The resulting flame is detected by the centrally located flame detection sensor and converted into an electrical signal, which is then transmitted to the control circuit. Because the flame detection sensor is located at the geometric center of the combustion chamber's cross-section and inside the fuel outlet, it avoids causing flow turbulence to the flue gas and combustion airflow, resulting in a more uniform flame and a more stable heating effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0018] Figure 1 A schematic diagram of the first embodiment of the burner center fuel supply structure of the present invention; Figure 2 A schematic diagram of a second embodiment of the burner center fuel supply structure of the present invention; Figure 3 A schematic diagram of a third embodiment of the burner center fuel supply structure of the present invention; Figure 4 This is a cross-sectional view of a first embodiment of the burner center fuel supply structure of the present invention. In the diagram: 1. Combustion chamber; 11. First inclined plane; 12. Second inclined plane; 2. Flame detection sensor; 3. Air inlet; 4. Fuel outlet; 41. Gear groove; 42. Slit hole; 5. Fuel sleeve; 6. Annular plate; 61. Flow guide channel; 7. Flow guide strip. Detailed Implementation

[0019] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying it, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] This embodiment provides a burner center fuel supply structure, such as Figures 1-4 As shown, the system includes a combustion chamber 1, a flame detection sensor 2, and a fuel outlet 4. The flame detection sensor 2 is located at the center of the combustion chamber 1, and the fuel outlet 4 surrounds the flame detection sensor 2 and is evenly distributed around it. The flame detection sensor 2 can be a photoelectric flame sensor, a thermoelectric flame sensor, a thermal resistance flame sensor, an ionization flame sensor, etc. The fuel entering the combustion chamber 1 through the fuel outlet 4 can be a gaseous or liquid fuel.

[0023] In this embodiment, the burner's central fuel supply structure places both the fuel outlet 4 and the flame detection sensor 2 at the geometric center of the combustion chamber's cross-section. Fuel enters the combustion chamber 1 through the fuel outlet 4, is ignited, and burns. The resulting flame is detected by the centrally located flame detection sensor 2 and converted into an electrical signal, which is then transmitted to the control circuit. Because the flame detection sensor 2 is positioned at the geometric center of the combustion chamber's cross-section and inside the fuel outlet 4, it avoids disrupting the flow of flue gas and combustion air, resulting in a more uniform flame and more stable heating. Furthermore, the central location of the flame detection sensor 2 in the combustion chamber 1 further enhances its detection accuracy.

[0024] In a preferred embodiment, the combustion chamber 1 has a cylindrical or conical structure, the flame detection sensor 2 is located at the center of the combustion chamber 1, and the center point of the fuel outlet 4 is located at the center of the combustion chamber 1.

[0025] In this embodiment, the sidewall of the combustion chamber 1 is cylindrical, which makes the flame more dispersed and uniform in the combustion chamber 1, thereby further improving the heating effect.

[0026] In a preferred embodiment, a plurality of air inlets 3 for air intake are provided around the combustion chamber 1. The air inlets 3 are evenly distributed around the combustion chamber 1 and are located outside the fuel outlet 4. The air inlets 3 can be circular, elliptical, or other shapes. The plurality of air inlets 3 form a circle with the center of the combustion chamber 1 as the center.

[0027] Air enters the combustion chamber 1 through multiple air inlets 3 and mixes thoroughly with the fuel entering the combustion chamber 1 through the fuel outlet 4. The multiple air inlets 3 are evenly distributed around the combustion chamber 1, which can effectively improve the mixing effect of air and fuel, resulting in more complete combustion. Furthermore, the multiple air inlets 3 and the fuel outlet 4 are all located outside the flame detection sensor 2, thus further reducing the influence of the flame detection sensor 2 on the air and fuel mixing.

[0028] Example 1 The burner center fuel supply structure of this embodiment, as follows: Figure 1 As shown, a fuel sleeve 5 is installed inside the combustion chamber 1. The fuel sleeve 5 is fitted over the outside of the flame detection sensor 2 and is coaxially arranged with the flame detection sensor 2, forming a fuel outlet 4 between the fuel sleeve 5 and the flame detection sensor 2. The head end of the flame detection sensor 2 extends to the outside of the fuel sleeve 5. Multiple air inlets 3 are evenly distributed on the side wall of the combustion chamber 1. The flame detection sensor 2 is a thermoelectric flame detection sensor.

[0029] In this embodiment, the liquid fuel enters the combustion chamber 1 through the fuel outlet 4 between the fuel sleeve 5 and the flame detection sensor 2. After mixing with the air entering through the air inlet 3 on the combustion chamber 1, it is ignited to form combustion. The combustion flame heats the thermoelectric flame detection sensor 1 and generates an electrical signal.

[0030] In this embodiment, a fuel outlet 4 is formed between the fuel sleeve 5 and the flame detection sensor 2. The fuel flows from the fuel outlet 4 to the combustion chamber 1, and can be evenly distributed in the combustion chamber 1 without being disturbed by the flame detection sensor.

[0031] Example 2 The burner center fuel supply structure of this embodiment, as follows: Figure 2As shown, a ring-shaped fuel outlet 4 is provided at the bottom of the combustion chamber 1, and the fuel outlet 4 surrounds the base of the flame detection sensor 2. Fuel enters the combustion chamber 1 from the bottom through the fuel outlet 4. The air inlets 3 are circular, and multiple air inlets 3 are evenly distributed on the side wall of the combustion chamber 1.

[0032] In a preferred embodiment, a plurality of grooves 41 are evenly arranged around the fuel outlet 4. The grooves 41 are connected to the fuel outlet 4 and are recessed relative to the bottom plate of the combustion chamber 1. The grooves 41 can be strip-shaped or fan-shaped. The plurality of grooves 41 guide the fuel to the outer periphery of the fuel outlet 4, so that the fuel is evenly distributed around the flame detection sensor 2, thereby improving the uniformity of fuel distribution.

[0033] Preferably, an annular plate 6 extending outwards is provided around the combustion chamber 1. The surface of the annular plate 6 is perpendicular to the side wall of the combustion chamber 1. Multiple arc-shaped guide strips 7 are provided on the surface of the annular plate 6, and a guide channel 61 is formed between two adjacent guide strips 7. The diameter of the guide channel 61 gradually increases from the inside to the outside. The annular plate 6 and the guide strips 7 guide the combustion flame, making combustion more complete and the flame more uniform.

[0034] In this embodiment, the flame detection sensor 2 is an ionization flame detection sensor. The flame detection sensor 2 is located at the center of the combustion chamber 1. The bottom of the combustion chamber 1 is provided with an annular fuel outlet 4 with a toothed groove 41 surrounding the base of the ionization flame detection sensor 2. Liquid fuel enters the combustion chamber 1 through the fuel outlet 4 and mixes with the air entering the combustion chamber 1 through the air inlet 3 on the combustion chamber 1. The mixture is then ignited to form combustion. The ion current in the combustion flame is transmitted to the control circuit through the ionization flame detection sensor 2.

[0035] Example 3 The burner center fuel supply structure of this embodiment, as follows: Figure 3 and Figure 4 As shown, the fuel outlet 4 consists of multiple elongated slits 42, which are evenly distributed around the flame detection sensor 2 and arranged in a radiating pattern outward from the flame detection sensor 2 as the center. The slits 42 provide elongated entry channels for fuel to enter the combustion chamber, allowing the fuel to disperse rapidly within the combustion chamber upon entry, thereby increasing the fuel dispersion rate and further improving the uniformity of fuel distribution within the combustion chamber.

[0036] In a preferred embodiment, a first inclined surface 11 is provided at the bottom of the combustion chamber 1. The first inclined surface 11 is conical in shape and slopes upward from the inside out. Multiple slit holes 42 are distributed on the first inclined surface 11. The first inclined surface 11 causes the fuel entering the combustion chamber to tend to converge, ensuring the fuel concentration in the combustion chamber and promoting complete combustion.

[0037] In a preferred embodiment, a second inclined surface 12 is provided at the bottom of the combustion chamber 1. The second inclined surface 12 is conical in shape and slopes upward from the inside to the outside. The inner side of the second inclined surface 12 is connected to the outer side of the first inclined surface 11. Air inlets 3 are evenly distributed on the second inclined surface 12. Air enters the combustion chamber through the air inlets 3 and can be fully mixed with the fuel.

[0038] As a preferred embodiment, such as Figure 4 As shown, the inclination of the second inclined plane 12 is greater than that of the first inclined plane 11. That is, the angle between the second inclined plane 12 and the axis of the flame detection sensor 2 is smaller than the angle between the first inclined plane 11 and the axis of the flame detection sensor 2, so that the fuel entering through the slit hole 42 of the first inclined plane 11 can be cross-mixed with the air entering through the air inlet 3 of the second inclined plane 12, thereby improving the uniformity of mixing.

[0039] In this embodiment, the flame detection sensor 2 is a photoelectric flame detection sensor. The flame detection sensor 2 is located at the center of the combustion chamber 1. Multiple slit holes 42 are arranged around the circumference of the flame detection sensor 2. The gas ejected from the sensor mixes with the air ejected from the air inlet 3, which is also arranged in a ring, and is then ignited. The flame generated by the combustion is detected by the photoelectric flame detection sensor 2 located at the center and converted into an electrical signal that is transmitted to the control circuit.

[0040] It should be noted that the "outer side" refers to the side away from the center of combustion chamber 1, while the "inner side" refers to the side closer to the center of combustion chamber 1.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and improvements made by those skilled in the art without departing from the inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A burner center fuel supply structure, characterized in that, It includes a combustion chamber (1), a flame detection sensor (2) and a fuel outlet (4), wherein the flame detection sensor (2) is located at the center of the combustion chamber (1) and the fuel outlet (4) surrounds the flame detection sensor (2) and is evenly distributed around the flame detection sensor (2).

2. The burner center fuel supply structure according to claim 1, characterized in that, The combustion chamber (1) has a cylindrical or conical structure, the flame detection sensor (2) is located at the center of the combustion chamber (1), and the center point of the fuel outlet (4) is located at the center of the combustion chamber (1).

3. The burner center fuel supply structure according to claim 1, characterized in that, A plurality of air inlets (3) for air intake are provided around the combustion chamber (1). The plurality of air inlets (3) are evenly distributed around the combustion chamber (1) and are located outside the fuel outlet (4).

4. The burner center fuel supply structure according to claim 1, characterized in that, A fuel sleeve (5) is provided in the combustion chamber (1). The fuel sleeve (5) is sleeved on the outside of the flame detection sensor (2) and is coaxially arranged with the flame detection sensor (2). The fuel outlet (4) is formed between the fuel sleeve (5) and the flame detection sensor (2).

5. The burner center fuel supply structure according to claim 1, characterized in that, A ring-shaped fuel outlet (4) is provided at the bottom of the combustion chamber (1), and the fuel outlet (4) is arranged around the base of the flame detection sensor (2).

6. The burner center fuel supply structure according to claim 5, characterized in that, A plurality of grooves (41) are evenly arranged around the fuel outlet (4), the grooves (41) are connected to the fuel outlet (4), and the grooves (41) are recessed relative to the bottom plate of the combustion chamber (1).

7. The burner center fuel supply structure according to claim 2, characterized in that, The fuel outlet (4) is a plurality of elongated slit holes (42), which are evenly distributed around the flame detection sensor (2) and arranged in a divergent pattern outward from the center of the flame detection sensor (2).

8. A burner center fuel supply structure according to claim 7, characterized in that, A first inclined surface (11) is provided at the bottom of the combustion chamber (1). The first inclined surface (11) is conical and is inclined upward from the inside to the outside. A plurality of slit holes (42) are distributed on the first inclined surface (11).

9. A burner center fuel supply structure according to claim 8, characterized in that, A second inclined surface (12) is provided at the bottom of the combustion chamber (1). The second inclined surface (12) is conical and is inclined upward from the inside to the outside. The inner side of the second inclined surface (12) is connected to the outer side of the first inclined surface (11). The air inlet (3) is evenly arranged on the second inclined surface (12).

10. A burner center fuel supply structure according to claim 9, characterized in that, The inclination of the second inclined plane (12) is greater than that of the first inclined plane (11).

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