A boiler burner and a method for regulating a boiler burner

Abstract

The present application relates to chemical industry furnace burner technical field, disclose a kind of boiler burner and adjusting method for boiler burner.It is adapted to the communication state between the open inner ring pipe and the middle ring pipe, or adapted to the communication state between the open middle ring pipe and the outer ring pipe, or adapted to the communication state outside the open outer ring pipe according to the input air rate of fan, to be physically divided into multiple independent blocks, only the central region works at low load;When load increases, other regions are sequentially adapted to start according to the output power of fan, thereby avoiding the problem that air flow speed is too slow at low load, effectively expanding the overall regulation ratio, preventing backfire or flameout due to excessively low air flow speed at very low load, and preventing damage due to uneven mixing or excessively high surface temperature at superhigh load, thereby improving the applicability of the burner.

Description

Technical Field

[0001] This invention relates to the field of chemical furnace burner technology, specifically to a boiler burner and a method for adjusting the boiler burner. Background Technology

[0002] A pyrolysis furnace is a device used to perform pyrolysis reactions on hydrocarbons. The fully premixed burner in a pyrolysis furnace consists of a mixing unit and a head. The fully premixed burner thoroughly mixes the fuel gas and air before ignition, and then the resulting mixture is discharged and ignited. The fully premixed burner is an extremely important component of a pyrolysis furnace.

[0003] In existing burners, such as Chinese patent application CN120008037A, burner bricks are located inside the furnace of a pyrolysis furnace. The burner bricks consist of two opposing first bricks and two opposing second bricks, which together form an airflow channel. The first bricks are flat, and the second bricks are arc-shaped. The axes of both second bricks are located within the airflow channel. One of the two first bricks is an adjacent brick, and the other is a fixed brick. The side of the adjacent brick facing away from the airflow channel is positioned at a distance from the furnace tubes inside the furnace, and the side of the fixed brick facing away from the airflow channel is also positioned at a distance from the airflow channel. One side is used to fit against the inner wall of the furnace. The special shape design of the first and second bricks makes the burner brick and air channel roughly form a racetrack-shaped structure. Compared with the circular structure of burner brick and air channel, when the position of the inner wall of the furnace, the position of the furnace tube, and the cross-sectional area of ​​the air channel are the same, the distance between the center line of the racetrack-shaped air channel and the furnace tube is larger. Therefore, the racetrack-shaped air channel can increase the distance between the flame and the furnace tube, thereby reducing the probability of the flame impacting the furnace tube and reducing the probability of the furnace tube experiencing local high temperature problems. This plays a role in extending the operating cycle of the furnace tube and the pyrolysis furnace.

[0004] However, the following problems still exist: fully premixed burners are often used in chemical furnaces. Although fully premixed burners are superior to some traditional burners, the stable operating range (maximum / minimum load ratio) of fully premixed burners is still limited. Under extremely low loads, backfire or flameout is likely to occur due to excessively low airflow velocity. Under extremely high loads, damage may occur due to uneven mixing or excessively high surface temperature. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a boiler burner and a method for regulating it. This invention avoids the problem of excessively slow airflow velocity at low loads, effectively expands the overall regulation ratio, prevents backfire or flameout due to excessively low airflow velocity at extremely low loads, and avoids damage due to uneven mixing or excessively high surface temperatures at extremely high loads. It also improves the applicability of the burner. Furthermore, this invention solves the problems often encountered in chemical furnaces where fully premixed burners are used. While fully premixed burners are superior to some traditional burners, their stable operating range (maximum / minimum load ratio) is still limited. At extremely low loads, they are prone to backfire or flameout due to excessively low airflow velocity, and at extremely high loads, they may be damaged due to uneven mixing or excessively high surface temperatures.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a boiler burner, comprising a solenoid valve, a working mechanism disposed next to the solenoid valve, and an auxiliary mechanism disposed next to the working mechanism, wherein the working mechanism uses a flow regulating valve to regulate the input gas flow rate and a fan to regulate the input air flow rate, and the input gas and input air are mixed in a premixer; The auxiliary mechanism includes an inner ring tube, a middle ring tube, and an outer ring tube. It works in conjunction with the output power of the fan to adjust the opening state of the inner ring tube, the middle ring tube, and the outer ring tube, so that the output volume of the mixed gas is adapted to the output diameter of the inner ring tube, the middle ring tube, or the outer ring tube after opening.

[0007] Preferably, the working mechanism includes a gas pressure switch, the gas pressure switch is fixedly mounted on the solenoid valve, the detection end of the gas pressure switch is connected to the solenoid valve, the gas pressure switch is signal-connected to the solenoid valve, one end of the solenoid valve is connected to the gas supply system, and the other end of the solenoid valve is fixedly connected to a first pair of threaded connectors, the first pair of threaded connectors is connected to the solenoid valve, a gas valve is fixedly connected to the first pair of threaded connectors, and the gas valve is connected to the first pair of threaded connectors.

[0008] Preferably, a second pair of threaded connectors is fixedly connected to the gas valve, the second pair of threaded connectors are connected to the gas valve, a flange is fixedly connected to the second pair of threaded connectors, the flange is connected to the second pair of threaded connectors, and a flow regulating valve is fixedly connected to the flange, the flow regulating valve is connected to the flange.

[0009] Preferably, the premixer is fixedly connected to the flow regulating valve, the premixer is connected to the flow regulating valve, the fan is fixedly connected to the premixer, and the air outlet of the fan is connected to the inlet of the premixer.

[0010] Preferably, a zero-pressure actuator is fixedly installed on the gas valve, and a gas pressure feedback pipe is fixedly connected to the zero-pressure actuator. One end of the gas pressure feedback pipe is connected to the zero-pressure actuator, and the other end of the gas pressure feedback pipe is connected to the gas valve. An air pressure feedback pipe is fixedly connected to the zero-pressure actuator, and one end of the air pressure feedback pipe is connected to the zero-pressure actuator, and the other end of the air pressure feedback pipe is connected to the premixer.

[0011] Preferably, the auxiliary mechanism further includes a sleeve, the outlet end of the premixer is fixedly connected to the sleeve, the sleeve is connected to the outlet end of the premixer, a first external toothed collar is rotatably fitted on the sleeve, the first external toothed collar is connected to the sleeve, a second external toothed collar is rotatably fitted on the first external toothed collar, the second external toothed collar is connected to the first external toothed collar, and a third external toothed collar is rotatably fitted on the second external toothed collar, the third external toothed collar is connected to the second external toothed collar.

[0012] Preferably, a first gear is disposed beside the first external gear sleeve, the first gear meshes with the first external gear sleeve, a first motor is disposed beside the first gear, and the first motor is poweredly connected to the first gear; a second gear is disposed beside the second external gear sleeve, the second gear meshes with the second external gear sleeve, a second motor is disposed beside the second gear, and the second motor is poweredly connected to the second gear; a third gear is disposed beside the third external gear sleeve, the third gear meshes with the third external gear sleeve, a third motor is disposed beside the third gear, and the third motor is poweredly connected to the third gear.

[0013] Preferably, the inner ring tube is provided inside the first outer toothed sleeve, and the inner ring tube is fixedly connected to the first outer toothed sleeve using a semi-ring structure. The middle ring tube is provided inside the second outer toothed sleeve, and the middle ring tube is fixedly connected to the second outer toothed sleeve using a semi-ring structure. The middle ring tube is sleeved outside the inner ring tube, and the rotation trajectory of the upper half ring structure of the inner ring tube is close to the rotation trajectory of the upper half ring structure of the middle ring tube. The outer ring tube is provided inside the third outer toothed sleeve, and the outer ring tube is fixedly connected to the third outer toothed sleeve using a semi-ring structure. The outer ring tube is sleeved outside the middle ring tube, and the rotation trajectory of the upper half ring structure of the middle ring tube is close to the rotation trajectory of the upper half ring structure of the outer ring tube.

[0014] Preferably, a collar is rotatably fitted on the third outer toothed collar, the collar being connected to the third outer toothed collar, a sleeve is provided on the collar, the sleeve being connected to the collar, the sleeve being fitted outside the outer ring tube, and a combustion nozzle is fixedly connected to the sleeve, the combustion nozzle being connected to the sleeve.

[0015] A method for regulating a boiler burner, using the aforementioned boiler burner, includes the following steps: The flow regulating valve controls the amount of gas supplied, and the fan synchronously supplies air after adapting to the gas supply speed. The incoming gas and air are mixed in the premixer, and the connection between the inner and middle ring pipes, or between the middle and outer ring pipes, or the connection to the outside of the outer ring pipe is opened according to the air input rate of the fan.

[0016] Compared with the prior art, the present invention provides a boiler burner with the following advantages: 1. This boiler burner controls the amount of gas supplied through a flow regulating valve. The fan, after adapting to the gas supply speed, synchronously supplies air. The supplied gas and air are mixed in a premixer. Simultaneously, based on the fan's air input rate, the burner adjusts the connection between the inner and middle coils, or between the middle and outer coils, or the connection to the outside of the outer coil, physically dividing the boiler into multiple independent zones. At low loads, only the central zone operates. As the load increases, other zones are activated sequentially based on the fan's output power, i.e., opening the connection between the inner and middle coils, or between the middle and outer coils, or the connection to the outside of the outer coil. This avoids the problem of excessively slow airflow velocity at low loads, effectively expanding the overall regulation ratio and preventing backfire or flameout due to excessively low airflow velocity at extremely low loads. It also prevents damage due to uneven mixing or excessively high surface temperatures at extremely high loads, thus improving the burner's applicability.

[0017] 2. This boiler burner, through the arrangement of the first, second, and third outer toothed sleeves, allows the inner, middle, and outer ring tubes to be arbitrarily adjusted as the first, second, and third outer toothed sleeves rotate. Furthermore, the use of a semi-obstruction plate allows the semi-ring structures of the inner, middle, and outer ring tubes to be arbitrarily combined with the position of the semi-obstruction plate, thereby adjusting the diameter of the mixed gas flow path and improving the burner's applicability.

[0018] 3. The boiler burner, through the setting of gas pressure switch and zero pressure actuator, ensures the normal operation of the burner system, avoids deviation between gas delivery and air delivery in the burner, and improves the stability of burner operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structural distribution at the solenoid valve of the present invention; Figure 2 This is a schematic diagram of the working mechanism structure of the present invention; Figure 3 This is a schematic diagram of the structural distribution at the gas valve of the present invention; Figure 4 This is a schematic diagram of the structural distribution at the zero-pressure actuator of the present invention; Figure 5 This is a schematic diagram of the internal structure distribution of the premixer of the present invention; Figure 6 This is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 7 This is a schematic diagram of the structural distribution at the first external toothed collar of the present invention; Figure 8 This is a schematic diagram of the internal structure distribution of the sleeve of the present invention; Figure 9 This is a schematic diagram of the structural distribution at the semi-shielding plate of the present invention; Figure 10 This is an exploded view of the structure at the coiled tube in this invention.

[0020] In the diagram: 1. Solenoid valve; 2. Working mechanism; 21. Gas pressure switch; 22. First threaded connector; 23. Gas valve; 24. Second threaded connector; 25. Flange; 26. Flow regulating valve; 27. Premixer; 28. Fan; 29. ​​Zero-pressure actuator; 210. Gas pressure feedback pipe; 211. Air pressure feedback pipe; 3. Auxiliary mechanism; 31. Sleeve; 32. First external gear collar; 33. Second external gear collar; 34. Third external gear collar; 35. First gear; 36. First motor; 37. Second gear; 38. Second motor; 39. Third gear; 310. Third motor; 311. Inner ring tube; 312. Middle ring tube; 313. Outer ring tube; 314. Semi-baffle plate; 315. Shaft collar; 316. Sleeve; 317. Combustion nozzle. Detailed Implementation

[0021] 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.

[0022] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a boiler burner and a method for regulating the boiler burner.

[0023] Example 1, a typical implementation of this application, such as Figure 1As shown, a boiler burner includes a solenoid valve 1, a working mechanism 2 disposed next to the solenoid valve 1, and an auxiliary mechanism 3 disposed next to the working mechanism 2. The working mechanism 2 uses a flow regulating valve 26 to regulate the input gas flow rate and a blower 28 to regulate the input air flow rate. The input gas and the input air are mixed in a premixer 27. The auxiliary mechanism 3 includes an inner ring pipe 311, a middle ring pipe 312, and an outer ring pipe 313. It works in conjunction with the output power of the fan 28 to adjust the opening state of the inner ring pipe 311, the middle ring pipe 312, and the outer ring pipe 313, so that the output volume of the mixed gas is adapted to the output diameter of the inner ring pipe 311, the middle ring pipe 312, or the outer ring pipe 313 after opening.

[0024] When using this invention: The flow regulating valve 26 controls the amount of gas supplied. The fan 28, after adapting to the gas supply speed, synchronously supplies air. The supplied gas and air are mixed in the premixer 27. Simultaneously, based on the air input rate of the fan 28, the connection between the inner coil pipe 311 and the middle coil pipe 312 is adjusted, or the connection between the middle coil pipe 312 and the outer coil pipe 313 is adjusted, or the connection to the outside of the outer coil pipe 313 is adjusted, thus physically dividing the system into multiple independent blocks. At low loads, only the central area operates; at higher loads... During the extended period, other areas are started sequentially according to the output power of the fan 28, that is, the connection between the inner ring tube 311 and the middle ring tube 312 is opened, or the connection between the middle ring tube 312 and the outer ring tube 313 is opened, or the connection outside the outer ring tube 313 is opened. This avoids the problem of excessively slow airflow speed at low loads, effectively expands the overall regulation ratio, and prevents backfire or flameout caused by excessively low airflow speed at extremely low loads. At ultra-high loads, it may be damaged due to uneven mixing or excessively high surface temperature, thus improving the applicability of the burner.

[0025] Example 2, as Figures 2-5 As shown, the difference from the above embodiment is that the working mechanism 2 includes a gas pressure switch 21. The gas pressure switch 21 is fixedly installed on the solenoid valve 1. The detection end of the gas pressure switch 21 is connected to the solenoid valve 1. The gas pressure switch 21 is signal connected to the solenoid valve 1. One end of the solenoid valve 1 is connected to the gas supply system. The other end of the solenoid valve 1 is fixedly connected to a first pair of threaded connectors 22. The first pair of threaded connectors 22 is connected to the solenoid valve 1. A gas valve 23 is fixedly connected to the first pair of threaded connectors 22. The gas valve 23 is connected to the first pair of threaded connectors 22.

[0026] Specifically, the gas pressure switch 21 is a safety protection and control element used to monitor the gas pressure and ensure that it is within a safe and stable design range to protect the entire combustion system. The gas pressure switch 21 is existing technology and will not be described in detail here.

[0027] Furthermore, a second pair of threaded connectors 24 are fixedly connected to the gas valve 23, and the second pair of threaded connectors 24 are connected to the gas valve 23. A flange 25 is fixedly connected to the second pair of threaded connectors 24, and the flange 25 is connected to the second pair of threaded connectors 24. A flow regulating valve 26 is fixedly connected to the flange 25, and the flow regulating valve 26 is connected to the flange 25.

[0028] Furthermore, the flow regulating valve 26 is existing technology, which uses manual rotation of the adjusting screw to close or open the upper and lower blades to regulate the amount of gas passing through the middle.

[0029] Furthermore, a premixer 27 is fixedly connected to the flow regulating valve 26, and the premixer 27 is connected to the flow regulating valve 26. A fan 28 is fixedly connected to the premixer 27, and the air outlet of the fan 28 is connected to the inlet of the premixer 27.

[0030] Furthermore, the premixer 27 is existing technology. It uses the negative pressure (Venturi effect) generated by air flow to automatically draw in the gas and achieve uniform mixing of gas and air. Therefore, the specific structure of the premixer 27 will not be described in detail here.

[0031] Furthermore, a zero-pressure actuator 29 is fixedly installed on the gas valve 23, and a gas pressure feedback pipe 210 is fixedly connected to the zero-pressure actuator 29. One end of the gas pressure feedback pipe 210 is connected to the zero-pressure actuator 29, and the other end of the gas pressure feedback pipe 210 is connected to the gas valve 23. An air pressure feedback pipe 211 is fixedly connected to the zero-pressure actuator 29, and one end of the air pressure feedback pipe 211 is connected to the zero-pressure actuator 29, and the other end of the air pressure feedback pipe 211 is connected to the premixer 27.

[0032] Furthermore, the zero-pressure actuator 29 is existing technology used to automatically maintain a dynamic balance between the pressure before the gas valve 23 and the air pressure required for combustion, ensuring a precise air-fuel ratio under any operating condition.

[0033] When the burner is working, the gas supply system supplies gas from the solenoid valve 1. The gas flows from the solenoid valve 1 into the first threaded connector 22, then from the first threaded connector 22 into the gas valve 23, then from the gas valve 23 into the second threaded connector 24, then from the second threaded connector 24 into the flange 25, and then from the flange 25 into the flow regulating valve 26. The opening degree of the flow regulating valve 26 can be manually adjusted to regulate the gas flow rate, so that the gas flows from the flow regulating valve 26 into the premixer 27. Then, the blower 28 draws external air and delivers it to the premixer 27, so that the air and gas are mixed in the premixer 27. At the same time, the zero-pressure actuator 29 uses the gas pressure feedback pipe 210 and the air pressure feedback pipe 211 to keep the gas and air delivery consistent.

[0034] Example 3, as Figures 6-10 As shown, the difference from the above embodiment is that the auxiliary mechanism 3 also includes a sleeve 31. The sleeve 31 is fixedly connected to the outlet end of the premixer 27. The sleeve 31 is connected to the outlet end of the premixer 27. A first external toothed collar 32 is rotatably fitted on the sleeve 31. The first external toothed collar 32 is connected to the sleeve 31. A second external toothed collar 33 is rotatably fitted on the first external toothed collar 32. The second external toothed collar 33 is connected to the first external toothed collar 32. A third external toothed collar 34 is rotatably fitted on the second external toothed collar 33. The third external toothed collar 34 is connected to the second external toothed collar 33.

[0035] Furthermore, a first gear 35 is provided next to the first external gear sleeve 32, and the first gear 35 meshes with the first external gear sleeve 32. A first motor 36 is provided next to the first gear 35, and the first motor 36 is poweredly connected to the first gear 35. A second gear 37 is provided next to the second external gear sleeve 33, and the second gear 37 meshes with the second external gear sleeve 33. A second motor 38 is provided next to the second gear 37, and the second motor 38 is poweredly connected to the second gear 37. A third gear 39 is provided next to the third external gear sleeve 34, and the third gear 39 meshes with the third external gear sleeve 34. A third motor 310 is provided next to the third gear 39, and the third motor 310 is poweredly connected to the third gear 39.

[0036] Specifically, the first motor 36, the second motor 38, and the third motor 310 are all servo motors.

[0037] Furthermore, an inner ring tube 311 is provided inside the first outer toothed sleeve 32, and the inner ring tube 311 is fixedly connected to the first outer toothed sleeve 32 by a semi-ring structure. A middle ring tube 312 is provided inside the second outer toothed sleeve 33, and the middle ring tube 312 is fixedly connected to the second outer toothed sleeve 33 by a semi-ring structure. The middle ring tube 312 is sleeved outside the inner ring tube 311, and the rotation trajectory of the upper half ring structure of the inner ring tube 311 is close to the rotation trajectory of the upper half ring structure of the middle ring tube 312. An outer ring tube 313 is provided inside the third outer toothed sleeve 34, and the outer ring tube 313 is fixedly connected to the third outer toothed sleeve 34 by a semi-ring structure. The outer ring tube 313 is sleeved outside the middle ring tube 312, and the rotation trajectory of the upper half ring structure of the middle ring tube 312 is close to the rotation trajectory of the upper half ring structure of the outer ring tube 313.

[0038] Furthermore, a collar 315 is rotatably fitted on the third outer toothed collar 34, and the collar 315 is connected to the third outer toothed collar 34. A sleeve 316 is provided on the collar 315, and the sleeve 316 is connected to the collar 315. The sleeve 316 is fitted outside the outer ring tube 313, and a combustion nozzle 317 is fixedly connected to the sleeve 316, and the combustion nozzle 317 is connected to the sleeve 316.

[0039] When the mixed gas is delivered to the combustion nozzle 317, under low load, the first motor 36 is started. The first motor 36 drives the first gear 35 to rotate, and the first gear 35 drives the first outer toothed sleeve 32 to rotate. The first outer toothed sleeve 32 drives the inner tube 311 to rotate, causing the semi-circular structure of the inner tube 311 to rotate downwards. The semi-circular structure of the inner tube 311 and the semi-baffle 314 complete the passage closure, allowing the mixed gas to flow from the premixer 27 into the sleeve 31. After the mixed gas flows from the sleeve 31 through the first outer toothed sleeve 32, the second outer toothed sleeve 33, and the third outer toothed sleeve 34, it can only pass through the inside of the inner tube 311, while other places are blocked by the semi-circular structure of the inner tube 311. The structure and the semi-obstruction plate 314 completely block the flow. Then, the mixed gas flows from the inner ring pipe 311 into the combustion nozzle 317 and completes injection combustion. As the load increases, the second motor 38 is started. The second motor 38 drives the second gear 37 to rotate, and the second gear 37 drives the second outer gear sleeve 33 to rotate. The second outer gear sleeve 33 drives the middle ring pipe 312 to rotate, causing the semi-ring structure of the middle ring pipe 312 to rotate downwards, while the semi-ring structure of the inner ring pipe 311 rotates upwards. The passage is closed by the semi-ring structure of the inner ring pipe 311 and the semi-ring structure of the middle ring pipe 312, so that the mixed gas can only pass through the inside of the inner ring pipe 311 and the part between the inner ring pipe 311 and the middle ring pipe 312. This means increasing the diameter of the primary mixed gas delivery port to accommodate the increased mixed gas delivery volume. Similarly, as the load continues to increase, the third motor 310 is activated. The third motor 310 drives the third gear 39 to rotate, which in turn drives the third outer gear sleeve 34 to rotate. The third outer gear sleeve 34 then drives the outer ring tube 313 to rotate, causing the semi-ring structure of the outer ring tube 313 to rotate downwards, while the semi-ring structures of the middle ring tube 312 and the inner ring tube 311 both rotate upwards. The semi-ring structures of the middle ring tube 312 and the outer ring tube 313 complete the passage closure, ensuring that the mixed gas can only flow from the inside of the inner ring tube 311 and between the inner ring tube 311 and the middle ring tube 312. Part of the passage between the inner ring pipe 311 and the outer ring pipe 313 increases the diameter of the primary mixed gas delivery port to accommodate the increased mixed gas delivery volume. Similarly, when the load increases to the maximum range, the semi-ring structures of the inner ring pipe 311, the middle ring pipe 312, and the outer ring pipe 313 all turn upwards, allowing the mixed gas to pass through the interior of the inner ring pipe 311, the portion between the inner ring pipe 311 and the middle ring pipe 312, the portion between the middle ring pipe 312 and the outer ring pipe 313, and the portion between the outer ring pipe 313 and the sleeve pipe 316. This opens the maximum value of the mixed gas delivery port to accommodate the maximum mixed gas delivery volume.

[0040] Working principle of the invention: The flow regulating valve 26 controls the amount of gas supplied. The fan 28, after adapting to the gas supply speed, synchronously supplies air. The supplied gas and air are mixed in the premixer 27. Simultaneously, based on the air input rate of the fan 28, the connection between the inner coil pipe 311 and the middle coil pipe 312 is adjusted, or the connection between the middle coil pipe 312 and the outer coil pipe 313 is adjusted, or the connection to the outside of the outer coil pipe 313 is adjusted, thus physically dividing the system into multiple independent blocks. At low loads, only the central area operates; at higher loads... When the time is extended, other areas are started sequentially according to the output power of the fan 28, that is, the connection between the inner ring tube 311 and the middle ring tube 312 is opened, or the connection between the middle ring tube 312 and the outer ring tube 313 is opened, or the connection outside the outer ring tube 313 is opened, thereby avoiding the problem of excessively slow airflow speed at low load, effectively expanding the overall regulation ratio, preventing backfire or flameout due to excessively low airflow speed at extremely low load, and preventing damage due to uneven mixing or excessively high surface temperature at ultra-high load, thus improving the applicability of the burner; When the burner is working, the gas supply system supplies gas from the solenoid valve 1. The gas flows from the solenoid valve 1 into the first threaded connector 22, then from the first threaded connector 22 into the gas valve 23, then from the gas valve 23 into the second threaded connector 24, then from the second threaded connector 24 into the flange 25, and then from the flange 25 into the flow regulating valve 26. The opening degree of the flow regulating valve 26 can be manually adjusted to regulate the gas flow rate, so that the gas flows from the flow regulating valve 26 into the premixer 27. Then, the blower 28 draws external air and delivers it to the premixer 27, so that the air and gas are mixed in the premixer 27. At the same time, the zero-pressure actuator 29 uses the gas pressure feedback pipe 210 and the air pressure feedback pipe 211 to keep the gas and air delivery consistent. When the mixed gas is delivered to the combustion nozzle 317, under low load, the first motor 36 is started. The first motor 36 drives the first gear 35 to rotate, and the first gear 35 drives the first outer toothed collar 32 to rotate. The first outer toothed collar 32 drives the inner ring tube 311 to rotate, causing the semi-ring structure of the inner ring tube 311 to rotate downwards. The semi-ring structure of the inner ring tube 311 and the semi-baffle plate 314 complete the passage closure, allowing the mixed gas to flow from the premixer 27 into the sleeve 31. After the mixed gas flows from the sleeve 31 through the first outer toothed collar 32, the second outer toothed collar 33, and the third outer toothed collar 34, it can only pass through the inside of the inner ring tube 311, while other places are blocked by the semi-ring structure of the inner ring tube 311. The mixture is completely blocked by the semi-blocking plate 314. Then, the mixed gas flows from the inner ring pipe 311 into the combustion nozzle 317 and completes injection combustion. As the load increases, the second motor 38 is activated. The second motor 38 drives the second gear 37 to rotate, which in turn drives the second outer gear ring 33 to rotate. The second outer gear ring 33 drives the middle ring pipe 312 to rotate, causing the semi-ring structure of the middle ring pipe 312 to rotate downwards, while the semi-ring structure of the inner ring pipe 311 rotates upwards. The semi-ring structures of the inner ring pipe 311 and the middle ring pipe 312 close the passage, allowing the mixed gas to pass only through the interior of the inner ring pipe 311 and the portion between the inner ring pipe 311 and the middle ring pipe 312. This increases the diameter of the primary mixed gas delivery port to accommodate the increased mixed gas delivery volume. Similarly, as the load continues to increase, the third motor 310 is activated. The third motor 310 drives the third gear 39 to rotate, which in turn drives the third outer gear sleeve 34 to rotate. The third outer gear sleeve 34 then drives the outer ring tube 313 to rotate, causing the semi-ring structure of the outer ring tube 313 to rotate downwards, while the semi-ring structures of the middle ring tube 312 and the inner ring tube 311 both rotate upwards. The semi-ring structures of the middle ring tube 312 and the outer ring tube 313 complete the passage closure, ensuring that the mixed gas can only flow from the inside of the inner ring tube 311 and between the inner ring tube 311 and the middle ring tube 312. Part of the passage between the inner ring pipe 311 and the outer ring pipe 313 increases the diameter of the primary mixed gas delivery port to accommodate the increased mixed gas delivery volume. Similarly, when the load increases to the maximum range, the semi-ring structures of the inner ring pipe 311, the middle ring pipe 312, and the outer ring pipe 313 all turn upwards, allowing the mixed gas to pass through the interior of the inner ring pipe 311, the portion between the inner ring pipe 311 and the middle ring pipe 312, the portion between the middle ring pipe 312 and the outer ring pipe 313, and the portion between the outer ring pipe 313 and the sleeve pipe 316. This opens the maximum value of the mixed gas delivery port to accommodate the maximum mixed gas delivery volume.

[0041] A method for regulating a boiler burner, using the aforementioned boiler burner, includes the following steps: The flow regulating valve 26 controls the amount of gas supplied, and the fan 28 synchronously supplies air after adapting to the gas supply speed. The incoming gas and air are mixed in the premixer 27. At the same time, depending on the input air rate of the fan 28, the connection between the inner ring pipe 311 and the middle ring pipe 312 is opened, or the connection between the middle ring pipe 312 and the outer ring pipe 313 is opened, or the connection to the outside of the outer ring pipe 313 is opened.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler burner, comprising a solenoid valve, a working mechanism disposed beside the solenoid valve, and an auxiliary mechanism disposed beside the working mechanism, characterized in that: The working mechanism uses a flow regulating valve to regulate the input gas flow rate and a blower to regulate the input air flow rate. The input gas and input air are mixed in a premixer. The auxiliary mechanism includes an inner ring tube, a middle ring tube, and an outer ring tube. It works in conjunction with the output power of the fan to adjust the opening state of the inner ring tube, the middle ring tube, and the outer ring tube, so that the output volume of the mixed gas is adapted to the output diameter of the inner ring tube, the middle ring tube, or the outer ring tube after opening. The auxiliary mechanism further includes a sleeve, the outlet end of the premixer is fixedly connected to the sleeve, the sleeve is connected to the outlet end of the premixer, a first external toothed collar is rotatably fitted on the sleeve, the first external toothed collar is connected to the sleeve, a second external toothed collar is rotatably fitted on the first external toothed collar, the second external toothed collar is connected to the first external toothed collar, and a third external toothed collar is rotatably fitted on the second external toothed collar, the third external toothed collar is connected to the second external toothed collar; The first outer toothed sleeve has an inner ring tube inside, and the inner ring tube is fixedly connected to the first outer toothed sleeve using a semi-ring structure. The second outer toothed sleeve has a middle ring tube inside, and the middle ring tube is fixedly connected to the second outer toothed sleeve using a semi-ring structure. The middle ring tube is sleeved outside the inner ring tube, and the rotation trajectory of the upper half-ring structure of the inner ring tube is close to the rotation trajectory of the upper half-ring structure of the middle ring tube. The third outer toothed sleeve has an outer ring tube inside, and the outer ring tube is fixedly connected to the third outer toothed sleeve using a semi-ring structure. The outer ring tube is sleeved outside the middle ring tube, and the rotation trajectory of the upper half-ring structure of the middle ring tube is close to the rotation trajectory of the upper half-ring structure of the outer ring tube.

2. A boiler burner according to claim 1, characterized in that: The working mechanism includes a gas pressure switch. The gas pressure switch is fixedly mounted on the solenoid valve. The detection end of the gas pressure switch is connected to the solenoid valve. The gas pressure switch is signal-connected to the solenoid valve. One end of the solenoid valve is connected to the gas supply system. The other end of the solenoid valve is fixedly connected to a first pair of threaded connectors. The first pair of threaded connectors is connected to the solenoid valve. A gas valve is fixedly connected to the first pair of threaded connectors. The gas valve is connected to the first pair of threaded connectors.

3. A boiler burner according to claim 2, characterized in that: A second pair of threaded connectors is fixedly connected to the gas valve. The second pair of threaded connectors is connected to the gas valve. A flange is fixedly connected to the second pair of threaded connectors. The flange is connected to the second pair of threaded connectors. The flow regulating valve is fixedly connected to the flange. The flow regulating valve is connected to the flange.

4. A boiler burner according to claim 3, characterized in that: The premixer is fixedly connected to the flow regulating valve, and the premixer is connected to the flow regulating valve. The fan is fixedly connected to the premixer, and the air outlet of the fan is connected to the inlet of the premixer.

5. A boiler burner according to claim 4, characterized in that: A zero-pressure actuator is fixedly installed on the gas valve. A gas pressure feedback pipe is fixedly connected to the zero-pressure actuator. One end of the gas pressure feedback pipe is connected to the zero-pressure actuator, and the other end is connected to the gas valve. An air pressure feedback pipe is fixedly connected to the zero-pressure actuator. One end of the air pressure feedback pipe is connected to the zero-pressure actuator, and the other end is connected to the premixer.

6. A boiler burner according to claim 5, characterized in that: A first gear is disposed next to the first external gear sleeve, and the first gear meshes with the first external gear sleeve. A first motor is disposed next to the first gear and is poweredly connected to the first gear. A second gear is disposed next to the second external gear sleeve, and the second gear meshes with the second external gear sleeve. A second motor is disposed next to the second gear and is poweredly connected to the second gear. A third gear is disposed next to the third external gear sleeve, and the third gear meshes with the third external gear sleeve. A third motor is disposed next to the third gear and is poweredly connected to the third gear.

7. A boiler burner according to claim 6, characterized in that: A collar is rotatably fitted on the third outer toothed collar, and the collar is connected to the third outer toothed collar. A sleeve is provided on the collar, and the sleeve is connected to the collar. The sleeve is fitted outside the outer ring tube, and a combustion nozzle is fixedly connected to the sleeve, and the combustion nozzle is connected to the sleeve.

8. A method for regulating a boiler burner, using a boiler burner as described in any one of claims 1-7, characterized in that, Includes the following steps: The flow regulating valve controls the amount of gas supplied, and the fan synchronously supplies air after adapting to the gas supply speed. The incoming gas and air are mixed in the premixer, and the connection between the inner and middle ring pipes, or between the middle and outer ring pipes, or the connection to the outside of the outer ring pipe is opened according to the air input rate of the fan.

Images