Natural gas preheating furnace burner

Abstract

The utility model belongs to the technical field of gas combustion, and particularly relates to a natural gas preheating furnace combustor which comprises a shell. The combustion gun is communicated with the air inlet pipe; the burner block is coaxially and fixedly connected with the shell; the incandescent light is used for igniting natural gas in the gas inlet pipe, and the incandescent light is communicated with the gas inlet pipe; the flame detector is used for detecting the flame condition in the combustor, and the flame detector is fixedly connected with the shell; the center gun is located in the middle of the shell, the center gun and the air inlet pipe are communicated with the inner ring guns, the multiple inner ring guns are located in the shell, the inner ring guns are circumferentially distributed with the center gun as the circle center, and the inner ring guns are communicated with the air inlet pipe; the multiple outer ring guns are arranged on the burner block, the outer ring guns are circumferentially distributed with the center gun as the circle center, and the outer ring guns communicate with the air inlet pipe. According to the scheme, the problem of insufficient natural gas combustion is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas combustion, and particularly relates to a burner for a natural gas preheating furnace. Background Art

[0002] Combustion of any kind of gas requires air for combustion support. The mixing ratio and degree of mixing of gas and air determine the combustion degree of the gas. The more fully the gas burns, the highest calorific value is generated, and the least waste gas and harmful gases are generated after combustion, thus achieving the purposes of high efficiency, energy conservation and environmental protection.

[0003] Currently, a natural gas burner with the publication number of CN105627311A includes a burner housing. A combustion chamber is provided at the upper part of the burner housing. A support plate is provided in the middle of the burner housing. A support cavity is provided in the middle of the support plate. It also includes a main combustion gun and a pilot gas pipe. The upper part of the main combustion gun is arranged in the support cavity. An air inlet is provided in the middle of the support cavity. A plurality of gas nozzles are provided at the upper part of the main combustion gun. A gas inlet is provided at the lower part of the main combustion gun. A gas inlet is provided at the lower part of the pilot gas pipe. An air inlet valve is provided on one side of the burner housing. The air inlet valve is provided with a damper adjusting device. In the natural gas burner of this invention, a plurality of gas nozzles make the natural gas disperse evenly. Air enters from the air inlet in the middle of the support cavity. The natural gas and air are in full contact and burn fully, achieving the purposes of high efficiency, energy conservation and environmental protection.

[0004] However, there is also a problem: there is only one combustion gun in this solution, which is very easy to cause incomplete combustion and low combustion efficiency. Content of the Utility Model

[0005] This solution provides a burner for a natural gas preheating furnace to solve the problem of incomplete combustion.

[0006] This solution provides a burner for a natural gas preheating furnace, including a housing: an air inlet pipe and a damper for air to enter are provided on the housing; a combustion gun: the combustion gun is communicated with the air inlet pipe; a burner block: the burner block is fixedly connected with the housing coaxially; a pilot light: the pilot light is used to ignite the natural gas in the air inlet pipe, and the pilot light is communicated with the air inlet pipe; a flame detector: the flame detector is used to detect the flame condition inside the burner, and the flame detector is fixedly connected with the housing; the combustion gun includes: a central gun: the central gun is located in the middle of the housing and is communicated with the air inlet pipe; an inner ring gun: a plurality of inner ring guns are provided inside the housing and are circumferentially distributed with the central gun as the center, and the inner ring gun is communicated with the air inlet pipe; an outer ring gun: a plurality of outer ring guns are provided, and the outer ring guns are arranged on the burner block and are circumferentially distributed with the central gun as the center, and the outer ring gun is communicated with the air inlet pipe.

[0007] The principle of this solution is as follows: Natural gas is introduced through the intake pipe and ignited by the pilot light. Then the flame enters the central lance, inner ring lance, and outer ring lance. The inner ring lance is used to promote the initial ignition source because it is close to the center of the burner and can quickly ignite the mixture of fuel and air. The outer ring lance is used to expand the combustion area to the periphery of the burner, increasing the combustion area, which helps to distribute heat more evenly.

[0008] The beneficial effects of this solution are as follows: The coordinated operation of the inner ring lance and the outer ring lance is crucial for optimizing the combustion process. The inner ring lance is responsible for providing a stable ignition source and the core combustion area, while the outer ring lance expands the combustion area, helping to achieve a more even heat distribution and more flexible control of heat output. The two effectively improve the combustion efficiency.

[0009] Furthermore, it also includes a sight hole, which is used to observe the internal flame condition and is connected to the housing. Through the sight hole, the operator can directly observe the color, shape, and stability of the flame to judge whether the burner is working properly. A healthy flame should have a blue center and a yellow edge, indicating sufficient combustion and proper air supply.

[0010] Furthermore, it also includes a controller and an adjustment mechanism. The controller is electrically connected to the flame detector, and the adjustment mechanism is used to adjust the air intake of the air damper and is electrically connected to the controller. The flame detector can monitor the state of the burner flame in real time to confirm whether the flame is burning stably. This is usually achieved by detecting the light of a specific spectrum emitted by the flame (such as ultraviolet light, visible light, or infrared light). When the flame detector monitors that the flame state is not good due to too little air intake, the controller controls the adjustment mechanism to increase the air intake of the air damper. When the flame detector monitors that the flame state is not good due to too much air intake, the controller controls the adjustment mechanism to decrease the air intake of the air damper. This mechanism realizes the automatic adjustment of the air intake of the air damper, reduces manual operation, and saves costs.

[0011] Furthermore, the adjustment mechanism includes a rotating shaft, a motor, and a wind plate. The motor is fixedly connected to the air damper, the rotating shaft is fixedly connected to the shaft of the motor, the motor is electrically connected to the controller, the wind plate is fixedly connected to the rotating shaft, and the wind plate cooperates with the air damper. When it is necessary to increase the air intake, the motor will control the rotating shaft to rotate forward by a set angle, so that the wind plate rotates to a parallel state to increase the air intake. When it is necessary to decrease the air intake, the motor will reverse by a set angle, so that the wind blocking area of the wind plate increases to reduce the air intake. This mechanism changes the wind blocking area by rotating the wind plate, and the structure is simple.

[0012] Furthermore, it also includes a filter plate, which cooperates with the air damper. Since it is easy for garbage to enter when the air damper intakes air, which can easily cause internal damage, this solution designs a filter plate to block large particle garbage and prevent garbage from entering the interior and causing damage to internal equipment.

[0013] Further, it also includes a clogging prevention mechanism, which includes a spring, a magnet, a connecting rod, and a guide rail. One end of the spring is fixedly connected to the air damper, and the other end is fixedly connected to the filter plate. One end of the connecting rod is fixedly connected to the filter plate, and the other end is matched with the magnet. The connecting rod and the air plate are ferromagnetic substances. The guide rail is fixedly connected to the air damper, and the magnet is slidably connected to the guide rail. The magnet is matched with the air plate.

[0014] After the filter plate is used for a long time, it will be clogged, resulting in a reduction in the air intake of the air damper. In this solution, every time the burner is started, the air plate will be opened under the action of the motor. When the air plate rotates, it will drive the magnet to move to the right. When it reaches the set position, the air plate will be separated from the magnet under the action of the rotating shaft. At this time, the magnet just comes to the position of the connecting rod, so that the magnet adsorbs on the connecting rod to complete the reset. This mechanism uses the state change of the air plate in the air damper when it is opened and closed to vibrate the filter plate and shake off the garbage on it. Compared with the existing vibrating screen, this solution can also vibrate the filter plate without a power source.

[0015] Further, the burner brick is provided with a plurality of air permeation holes. The air permeation holes allow air to enter, prevent the end from extinguishing after combustion, help to stabilize the flame, and prevent the flame from jumping or extinguishing.

[0016] Further, a rotating rod is provided on the air damper, and the rotating rod is used to rotate the air damper. The rotating rod is fixedly connected to the rotating shaft. When a problem is detected with the flame detector, the operator can also manually rotate the rotating rod to adjust the air intake volume. Brief Description of the Drawings

[0017] Figure 1 It is a structural diagram of a natural gas preheating furnace burner,

[0018] Figure 2 It is a front view of a natural gas preheating furnace burner,

[0019] Figure 3 It is a state diagram of the air plate of a natural gas preheating furnace burner in the closed state,

[0020] Figure 4 It is a state diagram of the air plate of a natural gas preheating furnace burner in the opened state.

[0021] The reference numerals in the specification drawings include: 1, outer shell; 2, burner brick; 3, outer ring gun; 4, air permeation hole; 5, central gun; 6, inner ring gun; 7, air damper; 8, rotating rod; 9, pilot burner; 10, intake pipe; 11, flame detector; 12, sight hole; 13, connecting rod; 14, magnet; 15, guide rail; 16, rotating shaft; 17, spring; 18, filter plate; 19, air plate. Detailed Description of the Embodiment

[0022] Basically as shown in the attached Figure 1As shown in:

[0023] This solution provides a natural gas preheating furnace burner, which includes a housing 1, a combustion gun, a burner brick 2, a pilot burner 9, a flame detector 11, a sight hole 12, a controller, an adjustment mechanism, a damper 7, a filter plate 18, an anti-blocking mechanism and a rotating rod 8.

[0024] The housing 1 is provided with an air inlet pipe 10 and a damper 7 for air intake. A rotating rod 8 is provided on the damper 7, and the rotating rod 8 is used to rotate the damper 7. The rotating rod 8 is fixedly connected to a rotating shaft 16. When the flame detector 11 has problems, the operator can also manually rotate the rotating rod 8 to adjust the air intake volume. The housing 1 is cylindrical and its surface is coated with waterproof paint.

[0025] The burner brick 2 is fixedly connected coaxially with the housing 1. Multiple air permeable holes 4 are designed inside the burner brick 2. The air permeable holes 4 are circumferentially distributed around the burner brick 2. The air permeable holes 4 allow air to enter, prevent the end from extinguishing after combustion, help stabilize the flame, and prevent the flame from jumping or extinguishing. The burner brick 2 is made of high-temperature resistant materials such as ceramics, refractory bricks or special alloys. In this embodiment, high-temperature resistant ceramics are used, which can resist high-temperature environments and at the same time protect other components of the burner from high-temperature damage. The burner brick 2 is provided with multiple air permeable holes 4. The air permeable holes 4 allow air to enter, prevent the end from extinguishing after combustion, help stabilize the flame, and prevent the flame from jumping or extinguishing.

[0026] Pilot burner 9: The pilot burner 9 is used to ignite the natural gas in the air inlet pipe 10, and the pilot burner 9 is connected to the air inlet pipe 10; the pilot burner 9 is a small continuously burning flame, and its main function is to quickly ignite the main burner before the main burner starts or after the main burner accidentally extinguishes. The state of the pilot burner 9 can also be used as an indicator of whether the burner system is normal. If the pilot burner 9 goes out, this may indicate some problems, such as gas supply interruption, ignition system failure or insufficient oxygen around the burner, etc. At this time, the safety mechanism of the burner usually shuts off the natural gas supply until the problem is solved. Flame detector 11: The flame detector 11 is used to detect the flame condition inside the burner, and the flame detector 11 is fixedly connected to the housing; the flame detector 11 can monitor the state of the burner flame in real time and confirm whether the flame is burning stably. This is usually achieved by detecting the light of a specific spectrum emitted by the flame (such as ultraviolet light, visible light or infrared light). The controller is electrically connected to the flame detector 11 and the adjustment mechanism, and the adjustment mechanism is used to adjust the air intake volume of the damper 7.

[0027] The combustion gun is connected to the air inlet pipe 10, and the combustion gun includes a central gun 5, an inner ring gun 6 and an outer ring gun 3.

[0028] The central gun 5 is located in the middle of the housing, and the central gun 5 is connected to the air inlet pipe 10. There are 8 inner ring guns 6, which are located inside the housing, and the inner ring guns 6 are circumferentially distributed with the central gun 5 as the center. The inner ring guns 6 are connected to the air inlet pipe 10; there are 12 outer ring guns 3, and the outer ring guns 3 are arranged on the burner brick 2. The outer ring guns 3 are circumferentially distributed with the central gun 5 as the center, and the outer ring guns 3 are connected to the air inlet pipe 10.

[0029] The inner ring guns 6 are used to promote the initial ignition source because they are close to the center of the burner and can quickly ignite the mixture of fuel and air. The outer ring guns 3 are used to expand the combustion area to the periphery of the burner, increasing the combustion area, which helps to distribute heat more evenly. The flame of the inner ring guns 6 can stabilize the combustion process, especially during the start-up phase of the burner or at low load operation, helping to maintain the continuity and stability of combustion. The configuration of the outer ring guns 3 can improve the shape and distribution of the flame, helping to achieve a more ideal combustion mode, such as reducing the length or width of the flame to meet specific heating requirements.

[0030] As shown in the Figure 2 appendix:

[0031] The viewing hole 12 is used to observe the internal flame condition, and the viewing hole 12 is connected to the housing. Through the viewing hole 12, the operator can directly observe the color, shape and stability of the flame to judge whether the burner is working properly. A healthy flame should have a blue center and a yellow edge, indicating sufficient combustion and proper air supply.

[0032] As shown in the Figure 2 , Figure 3 , Figure 4 appendix:

[0033] The adjustment mechanism includes a rotating shaft 16, a motor and a wind plate 19. The motor is fixedly connected to the air damper 7, the rotating shaft 16 is fixedly connected to the shaft of the motor, the motor is electrically connected to the controller, the wind plate 19 is fixedly connected to the rotating shaft 16, and the wind plate 19 cooperates with the air damper 7. When it is necessary to increase the air intake volume, the motor will control the rotating shaft 16 to rotate forward by a set angle, so that the wind plate 19 rotates to a parallel state to increase the air intake volume. When it is necessary to decrease the air intake volume, the motor will reverse by a set angle, so that the wind blocking area of the wind plate 19 increases and the air intake volume decreases. This mechanism changes the wind blocking area by rotating the wind plate 19, and the structure is simple. The filter plate 18 cooperates with the air damper 7. Since the air damper 7 is likely to allow garbage to enter when admitting air, it is very easy to cause internal damage. In this solution, the filter plate 18 is designed to block large particle garbage and prevent the garbage from entering the interior and causing damage to the internal equipment.

[0034] The anti-blocking mechanism includes a spring 17, a magnet 14, a connecting rod 13, and a guide rail 15. One end of the spring 17 is fixedly connected to the air damper 7, and the other end is fixedly connected to the filter plate 18. One end of the connecting rod 13 is fixedly connected to the filter plate 18. The connecting rod 13 and the air plate 19 are ferromagnetic substances. The guide rail 15 is fixedly connected to the air damper 7, and the magnet 14 is slidably connected to the guide rail 15.

[0035] As shown in the Figures 1-4 appendix:

[0036] The principle of this solution is as follows: When the operator starts using the burner, the intake pipe 10 intakes air, and the natural gas is ignited by the pilot lamp 9. Then the flame enters the central lance 5, the inner ring lance 6, and the outer ring lance 3. At the same time, the controller controls the air damper 7 to open, and the air plate 19 will open under the action of the motor. When the air plate 19 rotates, it will drive the magnet 14 to move to the right. When it reaches the set position, the air plate 19 will separate from the magnet 14 under the action of the rotating shaft 16. At this time, the magnet 14 just comes to the position of the connecting rod 13, so that the magnet 14 adsorbs on the connecting rod 13. When the burner is in the closed state, the air plate 19 in the air damper 7 will close under the action of the motor. At this time, the air plate 19 rotates by a set angle, and the air plate 19 will touch the magnet 14, so that the magnet 14 adsorbs to the air plate 19. The magnet 14 drives the connecting rod 13 to move to the left with the air plate 19, and the connecting rod 13 drives the filter plate 18 to move to the left. When it reaches the set position, the retraction force of the spring 17 is greater than the adsorption force of the magnet 14. At this time, the connecting rod 13 will disconnect from the magnet 14, and then return under the action of the spring 17, and then swing repeatedly, so that the filter plate 18 swings repeatedly to shake off the garbage blocking the filter plate 18.

[0037] The beneficial effects of this solution are as follows: 1. The coordinated operation of the inner ring lance 6 and the outer ring lance 3 is crucial for optimizing the combustion process. The inner ring lance 6 is responsible for providing a stable ignition source and the core combustion zone, while the outer ring lance 3 expands the combustion area, helping to achieve a more uniform heat distribution and a more flexible control of the heat output. The two effectively improve the combustion efficiency. 2. This mechanism realizes the automatic adjustment of the air intake volume of the air damper 7, reduces manual operation, and saves costs. 3. In this solution, a filter plate 18 is designed to block large particle garbage and prevent the garbage from entering the interior and causing damage to the internal equipment. 4. This mechanism utilizes the state change of the air plate 19 in the air damper 7 when it opens and closes, so that the filter plate 18 vibrates to shake off the garbage on it. Compared with the existing vibrating screen, this solution can also achieve the vibration of the filter plate 18 without a power source.

[0038] The above are only the embodiments of the present utility model, and common general knowledge such as specific structures and characteristics known in the solutions is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several modifications and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A natural gas preheating furnace burner, comprising: Housing (1): the housing (1) is provided with an air inlet pipe (10) and a damper (7) for admitting air; Combustion gun: the combustion gun is connected to the air inlet pipe (10); Burner brick (2): the burner brick (2) is coaxially fixedly connected to the outer shell (1); A permanent lamp (9): the permanent lamp (9) is used to ignite the natural gas in the air intake pipe (10), and the permanent lamp (9) is connected to the air intake pipe (10); Fire detector (11): the fire detector (11) is used to detect the flame condition inside the burner, and the fire detector (11) is fixedly connected to the shell; It is characterized in that The combustion gun comprises: Center gun (5): The center gun (5) is located in the middle of the housing, and the center gun (5) is connected to the air intake pipe (10). Inner ring gun (6): a plurality of the inner ring guns (6) are provided, and are located inside the housing. The inner ring guns (6) are distributed around a circle with the central gun (5) as the center. The inner ring guns (6) are connected to the air intake pipe (10); Outer ring gun (3): There are multiple outer ring guns (3), and the outer ring guns (3) are arranged on the burner brick (2). The outer ring guns (3) are distributed in a circle with the central gun (5) as the center. The outer ring guns (3) are connected to the air inlet pipe (10).

2. A natural gas preheating furnace burner according to claim 1, characterized in that: It also comprises a fire viewing hole (12), wherein the fire viewing hole (12) is used to view the internal flame condition, and the fire viewing hole (12) is connected to the shell.

3. A natural gas preheating furnace burner according to claim 1, characterized in that: It also includes a controller and an adjustment mechanism, wherein the controller is electrically connected to the fire detector (11), and the adjustment mechanism is used to adjust the air intake volume of the damper (7), and the adjustment mechanism is electrically connected to the controller.

4. A natural gas preheating furnace burner according to claim 3, characterized in that: The adjustment mechanism comprises a rotating shaft (16), a motor and a wind plate (19); the motor is fixedly connected to the damper (7); the rotating shaft (16) is fixedly connected to the shaft of the motor; the motor is electrically connected to a controller; the wind plate (19) is fixedly connected to the rotating shaft (16); and the wind plate (19) cooperates with the damper (7).

5. A natural gas preheating furnace burner according to claim 4, characterized in that: It also comprises a filter plate (18), wherein the filter plate (18) cooperates with the damper (7).

6. A natural gas preheating furnace burner according to claim 5, characterized in that: The invention also comprises an anti-blocking mechanism, which comprises a spring (17), a magnet (14), a connecting rod (13) and a guide rail (15); one end of the spring (17) is fixedly connected to the damper (7), and the other end is fixedly connected to the filter plate (18); one end of the connecting rod (13) is fixedly connected to the filter plate (18), and the other end cooperates with the magnet (14); the connecting rod (13) and the wind plate (19) are ferromagnetic materials; the guide rail (15) is fixedly connected to the damper (7); the magnet (14) is slidably connected to the guide rail (15); and the magnet (14) cooperates with the wind plate (19).

7. The natural gas preheating furnace burner according to claim 1, characterized in that: The burner brick (2) is provided with a plurality of air holes (4).

8. The natural gas preheating furnace burner according to claim 4, characterized in that: The damper (7) is provided with a rotating rod (8), the rotating rod (8) is used to rotate the damper (7), and the rotating rod (8) is fixedly connected to the rotating shaft (16).

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