Swirl burner and temperature monitoring and adjustment methods for it

Abstract

This invention discloses a swirl burner and a method for temperature monitoring and adjustment therefor. The swirl burner includes: a duct system extending along a first direction and having a burner nozzle at one end; temperature measuring points are provided on the central duct, primary duct, inner secondary duct, and outer secondary duct of the duct system; multiple temperature measuring points are arranged at intervals along the first direction; and an outlet temperature measuring point is provided at the burner nozzle; a first temperature sensor is arranged at the temperature measuring point to measure the wall temperature of the duct system at the temperature measuring point; a control cabinet system is configured to obtain the wall temperature of the outlet temperature measuring point based on the wall temperatures of the multiple temperature measuring points to obtain the outlet temperature of the burner nozzle; and a distributed control system is electrically connected to the control cabinet system to issue an alarm based on the outlet temperature. According to the swirl burner of this invention, the swirl burner can reliably and stably monitor the outlet temperature of the burner nozzle, making the swirl burner more stable and reliable during long-term operation.

Description

Technical Field

[0001] This invention relates to the field of burner equipment technology, and in particular to a swirl burner and a method for temperature monitoring and adjustment therefor. Background Technology

[0002] With the increasing complexity and volatility of the coal market, especially after purchased coal entered the domestic market, the actual coal types used by coal-fired power units have deviated significantly from the boiler's design coal types. For example, Indonesian coal and other high-volatile, high-moisture coal types have low ignition temperatures and require little ignition heat for combustion, making them extremely easy to burn. The pulverized coal gas flow from the pulverizer outlet is sent to the boiler burner through the primary air duct, and the radiant heat inside the boiler heats the pulverized coal gas flow. If the type of pulverized coal supplied changes during burner operation and the burner fails to adjust its operating parameters in time, the pulverized coal gas flow may start burning before it even leaves the burner nozzle, leading to burner burnout.

[0003] In related technologies, temperature sensors are installed at the burner nozzle to detect temperature and monitor the burner's operating status. When the temperature at the burner nozzle is detected to be higher than the ignition temperature of pulverized coal, it indicates that pulverized coal is burning within the burner, allowing the burner to adjust its operating parameters in a timely manner to prevent burner burnout. However, due to the high temperature at the burner nozzle, the temperature sensors located there are prone to measurement failure. This results in poor stability and reliability of the temperature readings obtained at the burner nozzle during long-term operation, leading to poor burner operational stability and reliability, and making it difficult to ensure the reliable operation of the power equipment. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a swirl burner that can reliably obtain the temperature at the burner nozzle, enabling the swirl burner to reliably adjust its operating parameters in a timely manner based on the temperature at the burner nozzle. This allows the burner to operate more stably and reliably during long-term operation, thus ensuring the operational reliability of power equipment.

[0005] The present invention also proposes a method for temperature monitoring and adjustment of the above-mentioned swirl burner.

[0006] According to a first aspect of the present invention, a swirl burner includes: a duct system extending along a first direction and having a burner nozzle formed at one end; the duct system including a central duct, a primary duct, an inner secondary duct, and an outer secondary duct arranged sequentially from the inside out; temperature measuring points being provided on the central duct, the primary duct, the inner secondary duct, and the outer secondary duct; a plurality of temperature measuring points being arranged at intervals along the first direction; and an outlet temperature measuring point being provided at the burner nozzle; a first temperature sensor having a plurality of first temperature sensors arranged corresponding one-to-one with the plurality of temperature measuring points; the first temperature sensor being located at the temperature measuring point to measure the wall temperature of the duct system at the temperature measuring point; a control cabinet system electrically connected to the plurality of first temperature sensors; the control cabinet system being configured to obtain the wall temperature of the outlet temperature measuring point based on the wall temperatures of the plurality of temperature measuring points to obtain the outlet temperature of the burner nozzle; and a distributed control system electrically connected to the control cabinet system to issue an alarm based on the outlet temperature.

[0007] According to the swirl burner of the present invention, temperature measuring points are set on the central air duct, primary air duct, inner secondary air duct, and outer secondary air duct. Multiple temperature measuring points are arranged at intervals along a first direction. Temperature sensors are installed at the temperature measuring points. The control cabinet system is electrically connected to multiple first temperature sensors, and the distributed control system is electrically connected to the control cabinet system. This allows the control cabinet system to reliably and stably obtain the outlet temperature at the burner nozzle based on the wall temperature obtained from each temperature measuring point through temperature fitting. This enables the swirl burner to reliably monitor the outlet temperature of the burner nozzle during long-term operation. The distributed control system can issue an alarm in a timely manner when the outlet temperature of the burner nozzle is abnormal, so that the operators can adjust the operating parameters of the swirl burner in a timely manner. This effectively reduces the probability of burner nozzle burnout, making the swirl burner more stable and reliable during long-term operation, and thus ensuring the reliability of power equipment operation.

[0008] In some embodiments of the present invention, the temperature measuring points are respectively disposed on the outer walls of the central air duct, the primary air duct, the inner secondary air duct, and the outer secondary air duct. The air duct system further includes a plurality of sleeves, which are respectively connected to the outer walls of the central air duct, the primary air duct, the inner secondary air duct, and the outer secondary air duct. The plurality of sleeves are arranged in a one-to-one correspondence with a plurality of first temperature sensors, which are disposed inside the sleeves.

[0009] In one embodiment of the present invention, the swirl burner further includes an air supply system, the air supply system including a fan, one end of the sleeve being fixedly connected to the outer wall, the other end of the sleeve being connected to the air outlet of the fan, and the fan being configured to introduce cooling air into the sleeve.

[0010] In some embodiments of the present invention, the temperature measuring point on the central air duct is formed as a first temperature measuring point, the temperature measuring point on the primary air duct is formed as a second temperature measuring point, the temperature measuring point on the inner secondary air duct is formed as a third temperature measuring point, and the temperature measuring point on the outer secondary air duct is formed as a fourth temperature measuring point. There are multiple first temperature measuring points, arranged at intervals along the circumference of the central air duct. There are also multiple second temperature measuring points, arranged at intervals along the circumference of the primary air duct. There are also multiple third temperature measuring points, arranged at intervals along the circumference of the inner secondary air duct. Finally, there are multiple fourth temperature measuring points, arranged at intervals along the circumference of the outer secondary air duct.

[0011] In some embodiments of the present invention, the first temperature sensor is a platinum-rhodium thermocouple.

[0012] In some embodiments of the present invention, the swirl burner further includes a second temperature sensor located at the outlet temperature measurement point.

[0013] According to a second aspect of the present invention, a temperature monitoring and adjustment method is used in a swirl burner according to a first aspect of the present invention. The temperature monitoring and adjustment method includes: acquiring wall temperature values ​​of the duct system at multiple temperature measuring points to form a wall temperature fitting curve; acquiring the outlet temperature of the burner nozzle based on the wall temperature fitting curve; when the outlet temperature is greater than the theoretical ignition temperature of pulverized coal, the distributed control system alarms; adjusting the operating parameters of the swirl burner; when the outlet temperature is less than the theoretical ignition temperature of pulverized coal, and the difference between the outlet temperature and the theoretical ignition temperature of pulverized coal is a first preset value, the distributed control system stops alarming.

[0014] According to the temperature monitoring and adjustment method of the present invention, by using a swirl burner for the first aspect described above, a wall temperature fitting curve is formed by acquiring wall temperature values ​​from multiple temperature measuring points, thereby obtaining the outlet temperature of the burner nozzle. This allows the swirl burner to reliably monitor the outlet temperature of the burner nozzle during long-term operation, enabling the distributed control system to issue an alarm in a timely manner when the outlet temperature of the burner nozzle is abnormal. This allows operators to adjust the operating parameters of the swirl burner promptly, thereby significantly reducing the probability of burner nozzle burnout and making the swirl burner more stable and reliable during long-term operation, thus ensuring the reliability of power equipment operation.

[0015] In some embodiments of the present invention, the first preset value is 10°C, and / or the operating parameters include: the airflow velocity in the primary air duct, the damper opening of the central air duct, and the coal mill outlet air temperature.

[0016] In some embodiments of the present invention, before obtaining the wall temperature values ​​of the duct system at multiple temperature measuring points and forming a wall temperature fitting curve, the temperature monitoring and adjustment method further includes: the control cabinet system inputting the coal quality parameters of the pulverized coal, the coal quality parameters including: dry ash-free volatile matter, air-dried ash content and air-dried moisture content; and calculating the theoretical ignition temperature of the pulverized coal according to the ignition temperature calculation formula.

[0017] In some embodiments of the present invention, after obtaining the outlet temperature of the burner nozzle based on the wall temperature fitting curve, the temperature monitoring and adjustment method further includes: when the outlet temperature is less than the theoretical ignition temperature of pulverized coal, the distributed control system does not alarm.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a swirl burner according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the sleeve and the first temperature sensor at the temperature measuring point in a swirl burner according to an embodiment of the present invention;

[0021] Figure 3 This is a flowchart of a temperature monitoring and adjustment method according to an embodiment of the present invention.

[0022] Figure label:

[0023] 10. Duct system; 101. Burner nozzle; 102. Temperature measuring point; 103. Outlet temperature measuring point; 104. Sheath;

[0024] 11. Central air duct; 12. Primary air duct; 13. Inner secondary air duct; 131. Swirl blades; 14. Outer secondary air duct;

[0025] 20. Control cabinet system; 30. Distributed control system;

[0026] 40. First temperature sensor;

[0027] 100. Swirl burner. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following is for reference. Figures 1-3 A swirl burner 100 according to an embodiment of the first aspect of the present invention is described.

[0030] like Figures 1-3 As shown, the swirl burner 100 according to a first aspect embodiment of the present invention includes: an air duct system 10, a first temperature sensor 40, a control cabinet system 20, and a distributed control system 30.

[0031] Specifically, the air duct system 10 is along the first direction (e.g., Figure 1 Extending in the front-to-back direction (as shown), and with a burner nozzle 101 formed at one end, the air duct system 10 includes a central air duct 11, a primary air duct 12, an inner secondary air duct 13, and an outer secondary air duct 14 arranged sequentially from the inside out. Temperature measuring points 102 are provided on the central air duct 11, primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14. Multiple temperature measuring points 102 are arranged at intervals along the first direction. The burner nozzle 101 is provided with an outlet temperature measuring point 103. Multiple first temperature sensors 40 are provided. The sensors 40 are arranged one-to-one with multiple temperature measuring points 102. The first temperature sensor 40 is arranged at the temperature measuring point 102 to measure the wall temperature of the air duct system 10 at the temperature measuring point 102. The multiple first temperature sensors 40 are electrically connected to the control cabinet system 20. The control cabinet system 20 is configured to obtain the wall temperature of the outlet temperature measuring point 103 based on the wall temperature of the multiple temperature measuring points 102 in order to obtain the outlet temperature of the burner nozzle 101. The distributed control system 30 is electrically connected to the control cabinet system 20 to issue an alarm based on the outlet temperature.

[0032] In this embodiment, the swirl burner 100 includes an air duct system 10, which includes a central air duct 11, a primary air duct 12, an inner secondary air duct 13, and an outer secondary air duct 14. The central air duct 11 can be used to transport air or serve as a channel for ignition gas. The air introduced into the central air duct 11 can regulate the air volume and change the position of the recirculation area in the furnace cavity, allowing the pulverized coal to burn better in the furnace cavity. The primary air duct 12 can be used to transport the pulverized coal airflow, allowing the pulverized coal airflow to be smoothly ejected from the burner nozzle 101 into the furnace cavity for combustion, and providing some oxygen for pulverized coal combustion. The inner secondary air duct 13 and the outer secondary air duct 14 can be used to transport the oxygen required for pulverized coal combustion. The inner secondary air duct 13 and the outer secondary air duct 14 can cooperate to supply air to the furnace cavity in stages, thereby reducing nitrogen oxide emissions to a certain extent. In this embodiment, the central air duct 11, primary air duct 12, inner secondary air duct 13 and outer secondary air duct 14 of the air duct system 10 are arranged sequentially from the inside to the outside, which can well meet the operation and use needs of the swirl burner 100.

[0033] In this embodiment, temperature measuring points 102 are provided in the central air duct 11, primary air duct 12, inner secondary air duct 13 and outer secondary air duct 14. Multiple temperature measuring points 102 are arranged at intervals along the first direction. The air duct system 10 extends along the first direction and one end forms a burner nozzle 101. Multiple temperature measuring points 102 are arranged at intervals along the coal powder airflow and the air conveying direction in the air duct system 10. A first temperature sensor 40 is arranged at the temperature measuring point 102. The structure is simple. The first temperature sensor 40 can detect the temperature of the air duct system 10 at the temperature measuring point 102, thereby obtaining the wall temperature of the air duct system 10 at each temperature measuring point 102 in the first direction. This allows the temperature of the air duct system 10 at different positions along the first direction when the swirl burner 100 is running.

[0034] It is understood that the burner nozzle 101 of the air duct system 10 is connected to the furnace cavity. The radiant heat from the combustion of pulverized coal in the furnace cavity will be transferred to the air and the pulverized coal airflow along the various air ducts in the air duct system 10, thereby making the temperature in the air duct system 10 higher along the first direction closer to the burner nozzle 101. In this embodiment, multiple temperature measuring points 102 are set along the first direction, and first temperature sensors 40 are arranged to obtain the temperature of multiple temperature measuring points 102. The multiple first temperature sensors 40 are connected to the control cabinet system 20, so that the control cabinet system 20 can deduce the outlet temperature measuring point 103 at the burner nozzle 101 based on the wall temperature of multiple temperature measuring points 102. Since the temperature measuring points 102 arranged in the central air duct 11, primary air duct 12, inner secondary air duct 13 and outer secondary air duct 14 are far away from the burner nozzle 101, the first temperature sensor 40 is less likely to fail due to high temperature. This allows the control cabinet system 20 to reliably obtain the wall temperature at each temperature measuring point 102. Then, the temperature at the outlet temperature measuring point 103 at the burner nozzle 101 can be reliably derived through temperature fitting, thus obtaining the outlet temperature of the burner nozzle 101. Therefore, the outlet temperature of the swirl burner 100 can be reliably monitored during operation.

[0035] In this embodiment, a distributed control system 30 is electrically connected to a control cabinet system 20. The distributed control system 30 issues an alarm based on the outlet temperature. For example, when the control cabinet system 20 detects that the outlet temperature of the burner nozzle 101 is greater than the ignition temperature of the pulverized coal gas flow, it indicates that the pulverized coal gas flow is prematurely combusting. The pulverized coal gas flow ignites before leaving the burner nozzle 101, and combustion occurs in the primary air duct 12 of the air duct system 10, posing a risk of burner nozzle 101 burnout. At this time, the distributed control system 30 can issue an alarm, allowing operators to adjust the operating parameters of the swirl burner 100 in a timely manner, adjusting the combustion position of the pulverized coal gas flow to the furnace cavity, thereby enabling the swirl burner 100 to continue to operate stably and reliably. When the control cabinet system 20 detects that the outlet temperature of the burner nozzle 101 is less than the ignition temperature of the pulverized coal gas flow, the distributed control system 30 does not issue an alarm. Thus, the swirl burner 100 can operate stably and reliably during long-term operation, thereby ensuring the operational reliability of the power equipment.

[0036] In this embodiment, multiple temperature measuring points 102 are arranged in the air duct system 10 along the first direction. When the pulverized coal gas flow is pre-combusted, the control cabinet system 20 can also make a more accurate judgment on the combustion position of the pulverized coal gas flow in the air duct system 10 based on the temperature obtained from the temperature measuring points 102. This allows the operators to make more accurate and detailed adjustments to the operating parameters of the swirl burner 100, which can improve the efficiency of the operators in adjusting the operating parameters of the swirl burner 100 to a certain extent. This allows the swirl burner 100 to return to normal operation more quickly, thereby improving the operational stability and reliability of the swirl burner 100 and thus ensuring the operational reliability of the power equipment.

[0037] According to an embodiment of the present invention, the swirl burner 100 has temperature measuring points 102 set on the central air duct 11, primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14. Multiple temperature measuring points 102 are arranged at intervals along a first direction. Temperature sensors are installed at each temperature measuring point 102. The control cabinet system 20 is electrically connected to multiple first temperature sensors 40, and the distributed control system 30 is electrically connected to the control cabinet system 20. This allows the control cabinet system 20 to reliably and stably obtain the burner spray temperature based on the wall temperature obtained from each temperature measuring point 102 through temperature fitting. The outlet temperature at nozzle 101 is monitored, allowing the swirl burner 100 to reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation. This enables the distributed control system 30 to issue an alarm promptly when the outlet temperature of the burner nozzle 101 is abnormal, allowing operators to adjust the operating parameters of the swirl burner 100 in a timely manner. This effectively reduces the probability of burner nozzle 101 burnout, making the swirl burner 100 more stable and reliable during long-term operation, and thus ensuring the reliability of power equipment operation.

[0038] In some embodiments of the present invention, reference is made to Figure 1 and Figure 2 As shown, temperature measuring points 102 can be respectively set on the outer walls of the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14. The air duct system 10 can also include sleeves 104. There are multiple sleeves 104. Multiple sleeves 104 are respectively connected to the outer walls of the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14. Multiple sleeves 104 are arranged in a one-to-one correspondence with multiple first temperature sensors 40. The first temperature sensors 40 are set inside the sleeves 104.

[0039] In this embodiment, temperature measuring points 102 are arranged on the outer wall of the central air duct 11, the outer wall of the primary air duct 12, the outer wall of the inner secondary air duct 13, and the outer wall of the outer secondary air duct 14. This facilitates the arrangement of the first temperature sensor 40 at the temperature measuring points 102, making it easier to arrange the first temperature sensor 40 at the temperature measuring points 102 of the central air duct 11, the primary air duct 12, the inner secondary air duct 13, and the outer secondary air duct 14. It also ensures that the first temperature sensor 40 is in a good operating environment and can stably perform temperature measurements.

[0040] In this embodiment, the duct system 10 is also provided with a sleeve 104. Multiple sleeves 104 are respectively connected to the outer walls of the central duct 11, the primary duct 12, the inner secondary duct 13, and the outer secondary duct 14. The first temperature sensor 40 is set inside the sleeve 104. The structure is simple. The sleeve 104 can play a good protective role for the first temperature sensor 40, avoiding the dust in the flue gas from causing erosion and wear to the first temperature sensor 40, so that the first temperature sensor 40 can operate more stably and reliably, thereby enabling the swirl burner 100 to obtain the outlet temperature at the burner nozzle 101 more stably and reliably.

[0041] In one embodiment of the present invention, the swirl burner 100 may further include an air supply system, the air supply system including a fan, one end of the sleeve 104 being fixedly connected to the outer wall, the other end of the sleeve 104 being connected to the air outlet of the fan, and the fan being configured to introduce cooling air into the sleeve 104.

[0042] In this embodiment, a fan is used to introduce cooling air into the sleeve 104. The structure is simple, and the cooling air effectively lowers the temperature of the space inside the sleeve 104, thus providing a better operating environment for the first temperature sensor 40. This reduces the probability of damage or malfunction due to high temperatures, allowing the first temperature sensor 40 to operate more stably and reliably. Consequently, the swirl burner 100 can more stably and reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, ensuring more stable and reliable operation of the swirl burner 100. Optionally, one end of each sleeve 104 can be welded to the outer wall of the central air duct 11, primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14, respectively, making the installation and fixation of the sleeves 104 on these ducts more secure.

[0043] In some embodiments of the present invention, reference is made to Figure 1As shown, the temperature measuring point 102 on the central air duct 11 can be formed as the first temperature measuring point, the temperature measuring point 102 on the primary air duct 12 can be formed as the second temperature measuring point, the temperature measuring point 102 on the inner secondary air duct 13 can be formed as the third temperature measuring point, and the temperature measuring point 102 on the outer secondary air duct 14 can be formed as the fourth temperature measuring point. There are multiple first temperature measuring points, which are arranged at intervals along the circumference of the central air duct 11. There are multiple second temperature measuring points, which are arranged at intervals along the circumference of the primary air duct 12. There are multiple third temperature measuring points, which are arranged at intervals along the circumference of the inner secondary air duct 13. There are multiple fourth temperature measuring points, which are arranged at intervals along the circumference of the outer secondary air duct 14.

[0044] In this embodiment, multiple temperature measuring points 102 on the central air duct 11 are designated as first temperature measuring points. These multiple first temperature measuring points are arranged circumferentially along the central air duct 11. The temperature data obtained from these multiple first temperature measuring points can be used as a reference for each other, reducing measurement errors and making the wall temperature obtained by the temperature measuring points 102 on the central air duct 11 more accurate. This allows the control cabinet system 20 to obtain an outlet temperature value closer to the actual temperature when using the temperature of the first temperature measuring points to deduce the outlet temperature of the burner nozzle 101. This enables the swirl burner 100 to monitor the condition of the burner nozzle 101 more accurately. At the same time, the multiple first temperature measuring points provide redundancy for the temperature measurement of the central air duct 11. If one of the multiple first temperature measuring points fails, the remaining first temperature measuring points can still stably measure the wall temperature. This significantly improves the stability of temperature measurement during the operation of the swirl burner 100, allowing the swirl burner 100 to monitor the outlet temperature of the burner nozzle 101 more stably and reliably, thus enabling the swirl burner 100 to operate more stably and reliably.

[0045] In this embodiment, multiple second temperature measuring points are set on the primary air duct 12. The multiple second temperature measuring points are arranged at intervals along the circumference of the primary air duct 12. The structure is simple and can effectively improve the stability and accuracy of the wall temperature measurement of the air duct system 10 at the temperature measuring point 102 located in the primary air duct 12 in the first direction. Multiple third temperature measuring points are set on the inner secondary air duct 13. The multiple third temperature measuring points are arranged at intervals along the circumference of the inner secondary air duct 13. The structure is simple and can effectively improve the stability and accuracy of the wall temperature measurement of the air duct system 10 at the temperature measuring point 102 located in the inner secondary air duct 13 in the first direction.

[0046] In this embodiment, multiple fourth temperature measuring points are set on the external secondary air duct 14. These multiple fourth temperature measuring points are arranged at intervals along the circumference of the external secondary air duct 14. The structure is simple and can greatly improve the stability and accuracy of the wall temperature measurement at the temperature measuring point 102 located in the first direction of the air duct system 10 in the external secondary air duct 14. The control cabinet system 20 can reliably form a more accurate wall temperature fitting curve based on the wall temperature obtained from multiple first temperature measuring points, multiple second temperature measuring points, multiple third temperature measuring points, and multiple fourth temperature measuring points. This makes the obtained outlet temperature of the burner nozzle 101 more accurate, and allows the control cabinet system 20 to monitor the outlet temperature of the burner nozzle 101 more stably and reliably. In turn, it can improve the accuracy of the alarm of the distributed control system 30 to a certain extent, and make the operation of the swirl burner 100 more stable and reliable.

[0047] Optionally, multiple first temperature measuring points can be evenly spaced along the circumference of the central air duct 11, multiple second temperature measuring points can be evenly spaced along the circumference of the primary air duct 12, multiple third temperature measuring points can be evenly spaced along the circumference of the inner secondary air duct 13, and multiple fourth temperature measuring points can be evenly spaced along the circumference of the outer secondary air duct 14. This can reduce temperature detection errors and make the wall temperature obtained by the first temperature sensor 40 at the multiple temperature measuring points 102 arranged along the first direction in the air duct system 10 more accurate.

[0048] Optionally, the first temperature measuring point can be arranged at one end of the central air duct 11 away from the burner nozzle 101 along the first direction, the second temperature measuring point can be arranged at one end of the primary air duct 12 away from the burner nozzle 101 along the first direction, the third temperature measuring point can be arranged at one end of the inner secondary air duct 13 away from the burner nozzle 101 along the first direction, and the fourth temperature measuring point can be arranged at one end of the outer secondary air duct 14 away from the burner nozzle 101 along the first direction. This facilitates the arrangement of the temperature measuring point 102 and the installation of the first temperature sensor 40 in the air duct system 10.

[0049] In some embodiments of the present invention, the first temperature sensor 40 may be a platinum-rhodium thermocouple.

[0050] In this embodiment, the first temperature sensor 40 is set as a platinum-rhodium thermocouple. Platinum-rhodium thermocouples have the advantages of high temperature measurement accuracy, high temperature resistance, excellent oxidation resistance under high temperature conditions, wide temperature range, and long service life. They can well meet the temperature measurement needs in the air duct system 10, so that the first temperature sensor 40 can operate more stably and reliably during the long-term operation of the swirl burner 100. This allows the swirl burner 100 to obtain the outlet temperature of the burner nozzle 101 more stably and reliably, so that the swirl burner 100 can operate more stably and reliably.

[0051] In some embodiments of the present invention, reference is made to Figure 1 As shown, the swirl burner 100 may also include a second temperature sensor, which is located at the outlet temperature measurement point 103.

[0052] In this embodiment, a second temperature sensor is provided at the outlet temperature measurement point 103. When the second temperature sensor is operating normally, it can directly measure the outlet wall temperature of the burner nozzle 101 to obtain the outlet temperature of the burner nozzle 101. This facilitates the control cabinet system 20 in obtaining the outlet temperature of the burner nozzle 101. At the same time, the outlet temperature obtained by the second temperature sensor can be compared with the outlet temperature derived by the control cabinet system 20 based on the wall temperatures obtained from multiple temperature measurement points 102. This allows the control cabinet system 20 to adaptively correct the derivation of the outlet temperature, making the outlet temperature obtained by the control cabinet system 20 based on multiple temperature measurement points 102 more consistent with the actual outlet temperature. This improves the accuracy of monitoring the outlet temperature of the burner nozzle 101 during the long-term operation of the swirl burner 100, enabling the swirl burner 100 to obtain a more accurate outlet temperature and thus allowing the swirl burner 100 to operate more stably and reliably.

[0053] Optionally, the second temperature sensor can be a platinum-rhodium thermocouple, and the number of outlet temperature measuring points 103 can also be set to multiple. The multiple outlet temperature measuring points 103 are arranged at intervals along the circumference of the burner nozzle 101, and the multiple second temperature sensors are arranged one-to-one with the multiple outlet temperature measuring points 103. The second temperature sensors can also be arranged inside the sleeve 104, so that the multiple second temperature sensors can work together to detect the outlet temperature of the burner nozzle 101 more stably and reliably.

[0054] In some embodiments of the present invention, such as Figure 1 As shown, a swirl vane 131 may be provided in the inner secondary air duct 13. The swirl vane 131 is located at the end of the inner secondary air duct 13 away from the burner nozzle 101 along the first direction.

[0055] In this embodiment, a swirl vane 131 is provided in the inner secondary air duct 13. The swirl vane 131 is arranged at the end away from the burner nozzle 101, that is, at the air inlet end of the inner secondary air duct 13. This allows the airflow to enter the inner secondary air duct 13 and then form a swirl flow through the swirl vane 131 into the furnace cavity of the combustion chamber, so that the air and pulverized coal can be fully mixed. This allows the pulverized coal airflow to be efficiently combusted in the furnace cavity, which well meets the operation and use requirements of the swirl combustion chamber.

[0056] Other configurations and operations of the swirl burner 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0057] The following is for reference. Figures 1-3 A method for temperature monitoring and adjustment according to a second aspect of the present invention is described.

[0058] like Figure 3 As shown, the temperature monitoring and adjustment method according to an embodiment of the present invention is used in a swirl burner 100 according to a first aspect embodiment of the present invention. The temperature monitoring and adjustment method includes: acquiring the wall temperature values ​​of the air duct system 10 at multiple temperature measuring points 102 to form a wall temperature fitting curve; acquiring the outlet temperature of the burner nozzle 101 according to the wall temperature fitting curve; when the outlet temperature is greater than the theoretical ignition temperature of pulverized coal, the distributed control system 30 alarms; adjusting the operating parameters of the swirl burner 100; when the outlet temperature is less than the theoretical ignition temperature of pulverized coal, and the difference between the outlet temperature and the theoretical ignition temperature of pulverized coal is a first preset value, the distributed control system 30 stops alarming.

[0059] In this embodiment, the wall temperature values ​​of the air duct system 10 at multiple temperature measuring points 102 are obtained to form a wall temperature fitting curve. Specifically, at multiple temperature measuring points 102 arranged at intervals along the first direction in the air duct system 10, the first temperature sensor 40 detects the wall temperature of the air duct system 10 at the corresponding temperature measuring point 102, thereby obtaining multiple wall temperature parameters distributed along the first direction. The control cabinet system 20 can construct a wall temperature fitting curve of the air duct system 10 along the first direction based on the obtained multiple wall temperature parameters, thereby deriving the wall temperature at the outlet temperature measuring point 103 at the burner nozzle 101 from the wall temperature fitting curve, thereby obtaining the outlet temperature at the burner nozzle 101.

[0060] When the outlet temperature is greater than the theoretical ignition temperature of pulverized coal, it indicates that the pulverized coal gas flow has already ignited and burned before flowing out of the burner nozzle 101. At this time, there is a risk of burner nozzle 101 burning out, and there is also a possibility that coke blocks may appear in the primary air duct 12 due to pulverized coal combustion. The distributed control system 30 will then issue an alarm. For example, the distributed control system 30 can use an audible and visual alarm to alert the operators, so that the operators can be informed in time that there is a problem with the operating status of the swirl burner 100, and thus the operators can deal with it in a timely manner.

[0061] After the distributed control system 30 alarms, the operator can adjust the operating parameters of the swirl burner 100 and change the ignition and combustion position of the pulverized coal airflow. This will prevent problems such as burner nozzle 101 burning when the swirl burner 100 continues to operate abnormally, and allow the swirl burner 100 to continue to operate stably and reliably. This will ensure that the swirl burner 100 can operate stably and reliably during long-term operation.

[0062] When adjusting the operating parameters of the swirl burner 100, the swirl burner 100 continues to operate. When the outlet temperature is lower than the theoretical ignition temperature of the pulverized coal, and the difference between the outlet temperature and the theoretical ignition temperature of the pulverized coal is the first preset value, it indicates that the pulverized coal gas flow burns after flowing out of the burner nozzle 101, and the swirl burner 100 is in normal operating condition. At this time, the distributed control system 30 stops alarming, and the swirl burner 100 can operate normally.

[0063] It is understandable that in this embodiment, the wall temperature obtained from multiple temperature measuring points 102 forms a wall temperature fitting curve, thereby deriving the outlet temperature of the burner nozzle 101. The obtained outlet temperature has a certain deviation from the actual outlet temperature at the burner nozzle 101, and there is also a certain deviation between the theoretical ignition temperature of pulverized coal and the actual ignition temperature of the pulverized coal gas flow. In this embodiment, the distributed control system 30 is set to stop the alarm when the difference between the outlet temperature and the theoretical ignition temperature of pulverized coal is a first preset value. This can effectively ensure that after the operating parameters of the swirl burner 100 are adjusted, the ignition position of the pulverized coal gas flow is outside the burner nozzle 101, thereby reliably preventing the burner nozzle 101 from burning out and other situations. This allows the swirl burner 100 to stably and reliably return to normal operation after the operating parameters are adjusted.

[0064] The temperature monitoring and adjustment method of this embodiment uses a swirl burner 100 according to the first aspect of the present invention to obtain the wall temperature values ​​of multiple temperature measuring points 102 to form a wall temperature fitting curve, thereby obtaining the outlet temperature of the burner nozzle 101. This allows the swirl burner 100 to reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, and enables the distributed control system 30 to issue an alarm in a timely manner when the outlet temperature of the burner nozzle 101 is abnormal. This allows operators to adjust the operating parameters of the swirl burner 100 in a timely manner, thereby effectively reducing the probability of burner nozzle 101 burnout and making the swirl burner 100 more stable and reliable during long-term operation, thus ensuring the reliability of power equipment operation.

[0065] In some embodiments of the present invention, the first preset value can be 10°C. In this embodiment, the first preset value is set to 10°C. When the outlet temperature drops to less than 10°C from the theoretical ignition temperature of the pulverized coal, the distributed control system 30 can stop the alarm. At this time, the swirl burner 100 is in normal operation. This can ensure the stable operation of the swirl burner 100 and allow the operator to reliably meet the adjustment needs of the operating parameters.

[0066] In some embodiments of the present invention, the operating parameters may include: the airflow velocity in the primary air duct 12, the damper opening of the central air duct 11, and the coal mill outlet air temperature.

[0067] In this embodiment, the operating parameters include the airflow velocity in the primary air duct 12, the damper opening of the central air duct 11, and the outlet air temperature of the coal mill. When the pulverized coal ignites prematurely in the swirl burner 100, the operator can increase the airflow velocity in the primary air duct 12 so that the pulverized coal airflow can flow out of the primary air duct 12 to the burner nozzle 101 more quickly, thereby moving the pulverized coal ignition position toward the burner nozzle 101. The operator can also increase the damper opening of the central air duct 11 to increase the airflow rate in the central air duct 11.

[0068] This can, to some extent, enhance the airflow at the burner nozzle 101, allowing the pulverized coal airflow to more easily flow towards the furnace cavity through the burner nozzle 101. This shifts the ignition point of the pulverized coal airflow towards the burner nozzle 101. Operators can also lower the outlet air temperature of the coal mill, reducing the temperature of the pulverized coal airflow entering the primary air duct 12. This alters the process of slowing the temperature rise of the pulverized coal airflow along the air duct system 10 to the ignition temperature of the pulverized coal, further shifting the ignition point of the pulverized coal airflow towards the burner nozzle 101. Operators can adjust various operating parameters as needed to ensure the ignition point of the pulverized coal airflow is within the furnace cavity outside the burner nozzle 101 for normal combustion, allowing the swirl burner 100 to operate normally. Of course, operating parameters can also include other parameters, such as the damper opening of the inner secondary air duct 13, airflow velocity, and coal type changes, which will not be listed here.

[0069] In some embodiments of the present invention, the first preset value is 10°C, and the operating parameters include: the airflow velocity in the primary air duct 12, the damper opening of the central air duct 11, and the coal mill outlet air temperature.

[0070] In this embodiment, the first preset value is set to 10℃. The operating parameters include the airflow velocity in the primary air duct 12, the damper opening of the central air duct 11, and the outlet air temperature of the coal mill. This allows the distributed control system 30 to work with the control cabinet system 20 to stably and reliably monitor and alarm the outlet temperature of the burner nozzle 101. This enables operators to effectively adjust the operating parameters of the swirl burner 100 to efficiently bring it to normal operating condition, thereby improving the stability and reliability of the swirl burner 100 during long-term operation.

[0071] In some embodiments of the present invention, such as Figure 3As shown, before obtaining the wall temperature values ​​of the air duct system 10 at multiple temperature measuring points 102 and forming a wall temperature fitting curve, the temperature monitoring and adjustment method also includes: the control cabinet system 20 inputting the coal quality parameters of the pulverized coal, which include: dry ash-free volatile matter, air-dried ash content and air-dried moisture content; and calculating the theoretical ignition temperature of the pulverized coal according to the ignition temperature calculation formula.

[0072] Understandably, the abnormality that the pulverized coal gas flow ignites and burns before the burner nozzle 101 during the operation of the swirl burner 100 usually occurs after the swirl burner 100 changes the type of coal it burns, such as after the type of coal blended is changed. Because the ignition temperature of the new coal type changes, the operating parameters of the swirl burner 100 cannot be well matched to the combustion requirements of the new coal type. For example, when the ignition temperature of the new coal type is low, the pulverized coal gas flow is more likely to ignite and burn before the burner nozzle 101.

[0073] In this embodiment, before acquiring the wall temperature values ​​of multiple temperature measuring points 102 of the air duct system 10 to form a wall temperature fitting curve, the control cabinet system 20 inputs the coal quality parameters of the pulverized coal and obtains the theoretical ignition temperature of the pulverized coal according to the ignition temperature calculation formula. This allows the control cabinet system 20 to compare the obtained outlet temperature of the burner nozzle 101 with the theoretical ignition temperature corresponding to the pulverized coal introduced at this time. This enables the control cabinet system 20 to reliably and accurately judge the outlet temperature of the burner nozzle 101, thereby ensuring that the obtained outlet temperature and the theoretical ignition temperature can reliably reflect the ignition and combustion position of the pulverized coal airflow. This reduces the probability of false alarms in the distributed control system 30, allowing the control cabinet system 20 and the distributed control system 30 to cooperate stably and reliably monitor and alarm the outlet temperature of the burner nozzle 101, thus enabling the swirl burner 100 to operate more stably and reliably.

[0074] In this embodiment, the ignition temperature calculation formula is Td=654-1.9Vdaf+0.43Aad-4, where Td represents the theoretical ignition temperature of the coal type, i.e. the theoretical ignition temperature of pulverized coal, Vdaf represents the volatile matter on a dry ash-free basis, Aad represents the ash content on an air-dried basis, and Mad represents the moisture content on an air-dried basis.

[0075] During the operation of the swirl burner 100, if the type of coal to be blended changes, the operator can input the coal quality parameters of the blended coal into the control cabinet system 20. This allows the control cabinet system 20 to obtain the theoretical ignition temperature of the blended coal, thereby providing accurate reference data for subsequent monitoring of the burner nozzle 101 temperature and alarms of the distributed control system 30. For example, the control cabinet system 20 can save the coal quality parameters entered each time. During long-term operation of the swirl burner 100, the operator only needs to switch the corresponding coal quality parameters on the panel of the distributed control system 30, which simplifies the input operation, improves input efficiency, and to a certain extent improves the operating efficiency of the control cabinet system 20 and the distributed control system 30.

[0076] In some embodiments of the present invention, such as Figure 3 As shown, after obtaining the outlet temperature of the burner nozzle 101 based on the wall temperature fitting curve, the temperature monitoring and adjustment method also includes: when the outlet temperature is lower than the theoretical ignition temperature of the pulverized coal, the distributed control system 30 does not alarm.

[0077] In this embodiment, after obtaining the outlet temperature of the burner nozzle 101 based on the wall temperature fitting curve, the distributed control system 30 does not alarm when the outlet temperature is lower than the theoretical ignition temperature of the pulverized coal, thereby avoiding interference with the normal operation of the swirl burner 100 and well meeting the usage needs during the operation of the swirl burner 100.

[0078] The following will refer to Figures 1-3 A swirl burner 100 according to a specific embodiment of the present invention is described.

[0079] like Figures 1-3 As shown, the swirl burner 100 includes an air duct system 10, a control cabinet system 20, a distributed control system 30, a first temperature sensor 40, a second temperature sensor, and an air supply system.

[0080] The air duct system 10 includes a central air duct 11, a primary air duct 12, an inner secondary air duct 13, and an outer secondary air duct 14, which extend along a first direction and are arranged sequentially from the inside to the outside. One end of the air duct system 10 forms a burner nozzle 101. Temperature measuring points 102 are provided on the outer walls of the central air duct 11, primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14, and multiple temperature measuring points 102 are provided on each air duct. The multiple temperature measuring points 102 on each air duct are evenly spaced along the circumferential direction of the air duct. A sleeve 104 is provided at the temperature measuring point 102, and one end of the sleeve 104 is welded to the outer wall. The first temperature sensor 40 is a platinum-rhodium thermocouple. The first temperature sensor 40 is arranged one-to-one with the multiple temperature measuring points 102. The first temperature sensor 40 is installed inside the sleeve 104 to detect the wall temperature of each air duct at the temperature measuring point 102. The first temperature sensor 40 is electrically connected to the control cabinet system 20. The inner secondary air duct 13 is equipped with swirl vanes 131.

[0081] The air supply system includes a fan, and the other end of the sleeve 104 is connected to the air outlet of the fan. The fan can introduce cooling air into the sleeve 104, and the cooling air can flow out of the sleeve 104, so that cooling air can be continuously introduced into the sleeve 104. Specifically, refer to... Figure 2 As shown, the sleeve 104 may include a first pipe segment and a second pipe segment connected together. The first pipe segment is welded to the outer wall, and the second pipe segment is connected to the first pipe segment and arranged at an angle to the first pipe segment, so that the accommodating space inside the sleeve 104 can be bent and extended in the extension direction of the sleeve 104. This can further reduce the probability of dust entering the sleeve 104, and enable the first temperature sensor 40 to perform temperature detection more stably.

[0082] The outer wall of the burner nozzle 101 is provided with an outlet temperature measuring point 103, and a sleeve 104 is also provided at the outlet temperature measuring point 103. The second temperature sensor is a platinum-rhodium thermocouple. The second temperature sensor is installed in the sleeve 104 of the outlet temperature measuring point and is electrically connected to the control cabinet system 20.

[0083] When the swirl burner 100 is operating, the control cabinet system 20 can obtain the temperature distribution of the air duct system 10 along the first direction through the first temperature sensor 40 at multiple temperature measuring points 102 and the second temperature sensor at the outlet temperature measuring point 103. This allows for comprehensive monitoring of the temperature changes at various locations along the first direction during the operation of the air duct system 10. This facilitates more accurate adjustment of the operating parameters of the swirl burner 100 based on the temperature conditions, so that the delivery of pulverized coal airflow and airflow can better meet the needs of pulverized coal combustion and allow the pulverized coal combustion to be in a better state.

[0084] In this embodiment, multiple temperature measuring points 102 are arranged along the first direction on the air duct system 10. The wall temperature data obtained at the multiple temperature measuring points 102 can be mutually verified, thereby effectively reducing the impact on the acquisition of the outlet temperature at the burner nozzle 101 when the swirl burner 100 is under harsh operating conditions. This allows the control cabinet system 20 to acquire the outlet temperature of the burner nozzle 101 more stably and reliably. As a result, during the long-term operation of the swirl burner 100, the control cabinet system 20 and the distributed control system 30 can cooperate to monitor the outlet temperature of the burner nozzle 101 stably and reliably.

[0085] The control cabinet system 20 can obtain the outlet temperature at the burner nozzle 101 based on the wall temperature obtained from multiple temperature measuring points 102, thereby enabling stable and reliable monitoring of the outlet temperature at the burner nozzle 101. When the outlet temperature exceeds the ignition temperature of the pulverized coal, the panel alarm system of the distributed control system 30 can force an alarm, allowing operators to be informed of the abnormal information in a timely manner. This allows operators to adjust the operating parameters of the swirl burner 100 promptly, so that the swirl burner 100 can be restored to normal operation in a timely manner. This improves the stability and reliability of the swirl burner 100, thus providing a good guarantee for the stable operation of the power equipment.

[0086] This embodiment compares the outlet temperature of the burner nozzle 101 with the theoretical ignition temperature of pulverized coal to determine the ignition location of the pulverized coal airflow. The ignition location of the pulverized coal airflow can be more intuitively represented by the temperature distribution in the air duct system 10. Furthermore, the distributed control system 30 promptly alerts the operators, allowing them to adjust the operating parameters of the swirl burner 100 in a timely manner, especially after significant changes in coal type. This effectively reduces the possibility of burner nozzle 101 burnout, improves the operational safety and stability of the swirl burner 100, and thus ensures the operational stability and reliability of the power equipment.

[0087] According to the present invention, the swirl burner 100 has temperature measuring points 102 set on the central air duct 11, primary air duct 12, inner secondary air duct 13 and outer secondary air duct 14. Multiple temperature measuring points 102 are arranged at intervals along a first direction. Temperature sensors are set at the temperature measuring points 102. The control cabinet system 20 is electrically connected to multiple first temperature sensors 40. The distributed control system 30 is electrically connected to the control cabinet system 20. The control cabinet system 20 can reliably obtain the outlet temperature at the burner nozzle 101 by temperature fitting based on the wall temperature obtained from each temperature measuring point 102. This allows the swirl burner 100 to reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation. The distributed control system 30 can issue an alarm in time when the outlet temperature of the burner nozzle 101 is abnormal, so that the operators can adjust the operating parameters of the swirl burner 100 in time. This greatly reduces the probability of burner nozzle 101 burnout and makes the swirl burner 100 more stable and reliable during long-term operation, thereby ensuring the reliability of power equipment operation.

[0088] The following will refer to Figures 1-3 A method for temperature monitoring and adjustment according to a specific embodiment of the present invention is described.

[0089] like Figures 1-3 As shown, when the swirl burner 100 is running, when pulverized coal is first introduced into the primary air duct 12 or when the type of pulverized coal is changed, the operator enters the coal quality parameters of the pulverized coal into the control cabinet system 20. The control cabinet system 20 obtains the theoretical ignition temperature of the pulverized coal according to the ignition temperature calculation formula. The control cabinet system 20 obtains the wall temperature values ​​of multiple temperature measuring points 102 and forms a wall temperature fitting curve. For example, the wall temperature fitting curve can be displayed on the panel of the distributed control system 30 so that the operator can intuitively obtain the temperature status information in the air duct system 10.

[0090] The control cabinet system 20 obtains the outlet temperature of the burner nozzle 101 based on the wall temperature fitting curve. When the outlet temperature is higher than the theoretical ignition temperature, it indicates that the operating parameters do not match the current coal powder gas flow and combustion requirements. The coal powder gas flow ignites and burns before exiting the burner nozzle 101. At this time, the swirl burner 100 is at risk of burnout of the burner nozzle 101. The distributed control system 30 can issue an online alarm through the dial screen. The operator adjusts the operating parameters of the swirl burner 100. When the outlet temperature drops below the theoretical ignition temperature and the difference between the two temperatures is a first preset value, the distributed control system 30 stops alarming, indicating that the swirl burner 100 is in a safe and stable normal operating state. When the outlet temperature is lower than the theoretical ignition temperature, it indicates that the coal powder gas flow is not burning in the swirl burner 100. The swirl burner 100 is in a stable operating state, and the distributed control system 30 does not alarm. Specifically, the dial screen of the distributed control system 30 does not display an alarm, indicating that the swirl burner 100 is in a safe operating state.

[0091] According to the temperature monitoring and adjustment method of the present invention, the swirl burner 100 used in the first aspect above obtains the wall temperature values ​​of multiple temperature measuring points 102 to form a wall temperature fitting curve, thereby obtaining the outlet temperature of the burner nozzle 101. This allows the swirl burner 100 to reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, and enables the distributed control system 30 to issue an alarm in a timely manner when the outlet temperature of the burner nozzle 101 is abnormal. This allows operators to adjust the operating parameters of the swirl burner 100 in a timely manner, thereby effectively reducing the probability of burner nozzle 101 burnout and making the swirl burner 100 more stable and reliable during long-term operation, thus ensuring the reliability of power equipment operation.

[0092] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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. Therefore, they should not be construed as limitations on this invention.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0094] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0096] Although embodiments of the invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A swirl burner, characterized by The application relates to a temperature measuring device for a wind channel system. The application comprises: a wind channel system (10) extending along a first direction and having a burner nozzle (101) at one end, the wind channel system (10) comprising a central wind channel (11), a primary wind channel (12), an inner secondary wind channel (13) and an outer secondary wind channel (14) arranged in sequence from inside to outside, and temperature measuring points (102) arranged on the central wind channel (11), the primary wind channel (12), the inner secondary wind channel (13) and the outer secondary wind channel (14), a plurality of the temperature measuring points (102) being arranged at intervals along the first direction, and the burner nozzle (101) being provided with an outlet temperature measuring point (103); a plurality of first temperature sensors (40) arranged one-to-one with the plurality of temperature measuring points (102), the first temperature sensors (40) being arranged at the temperature measuring points (102) to measure the wall temperature of the wind channel system (10) at the temperature measuring points (102); a control cabinet system (20) electrically connected with the plurality of first temperature sensors (40), the control cabinet system (20) being configured to form a wall temperature fitting curve according to the wall temperature of the plurality of temperature measuring points (102), obtain the wall temperature of the outlet temperature measuring point (103) and obtain the outlet temperature of the burner nozzle (101); 2. The swirl burner of claim 1, wherein a distributed control system (30) electrically connected with the control cabinet system (20) to issue an alarm according to the outlet temperature.

3. The swirl burner of claim 2, wherein The temperature measuring points (102) are respectively arranged on the outer walls of the central wind channel (11), the primary wind channel (12), the inner secondary wind channel (13) and the outer secondary wind channel (14), the wind channel system (10) further comprising a plurality of sleeves (104) respectively connected with the outer walls of the central wind channel (11), the primary wind channel (12), the inner secondary wind channel (13) and the outer secondary wind channel (14), and the first temperature sensors (40) being arranged one-to-one with the plurality of sleeves (104) and arranged in the sleeves (104).

4. The swirl burner according to any one of claims 1-3, characterized in that The application further comprises an air supply system comprising a fan, one end of the sleeve (104) being fixedly connected with the outer wall, the other end of the sleeve (104) being connected with an air outlet of the fan, and the fan being configured to introduce cooling air into the sleeve (104). The temperature measuring point (102) on the central wind channel (11) is formed as a first temperature measuring point, the temperature measuring point (102) on the primary wind channel (12) is formed as a second temperature measuring point, the temperature measuring point (102) on the inner secondary wind channel (13) is formed as a third temperature measuring point, and the temperature measuring point (102) on the outer secondary wind channel (14) is formed as a fourth temperature measuring point. The first temperature measuring points are arranged along the circumferential direction of the central air duct (11), the second temperature measuring points are arranged along the circumferential direction of the primary air duct (12), the third temperature measuring points are arranged along the circumferential direction of the inner secondary air duct (13), and the fourth temperature measuring points are arranged along the circumferential direction of the outer secondary air duct (14).

5. The swirl burner according to any one of claims 1-3, characterized in that The first temperature sensor (40) is a platinum-rhodium thermocouple.

6. The swirl burner of claim 1, wherein The temperature monitoring and adjusting method further comprises:

7. A temperature monitoring and adjustment method, characterized by, obtaining the wall temperature values of the air duct system (10) at the temperature measuring points (102) to form a wall temperature fitting curve; obtaining the outlet temperature of the burner nozzle (101) according to the wall temperature fitting curve; when the outlet temperature is greater than the theoretical ignition temperature of the pulverized coal, the distributed control system (30) alarms; adjusting the operating parameters of the cyclone burner; when the outlet temperature is less than the theoretical ignition temperature of the pulverized coal and the difference between the outlet temperature and the theoretical ignition temperature of the pulverized coal is a first preset value, the distributed control system (30) stops alarming. The first preset value is 10℃, and / or the operating parameters include the air flow velocity in the primary air duct (12), the damper opening degree of the central air duct (11), and the outlet air temperature of the coal mill.

8. The temperature monitoring and adjustment method of claim 7, wherein, Before obtaining the wall temperature values of the air duct system (10) at the temperature measuring points (102) to form a wall temperature fitting curve, the temperature monitoring and adjusting method further comprises:

9. The temperature monitoring and adjustment method of claim 7, wherein, The control cabinet system (20) inputs the coal quality parameters of the pulverized coal, which include dry ash-free volatile matter, air-dry ash, and air-dry moisture; calculating the theoretical ignition temperature of the pulverized coal according to an ignition temperature calculation formula. After obtaining the outlet temperature of the burner nozzle (101) according to the wall temperature fitting curve, the temperature monitoring and adjusting method further comprises: when the outlet temperature is less than the theoretical ignition temperature of the pulverized coal, the distributed control system (30) does not alarm.

10. The temperature monitoring and adjustment method of claim 7, wherein, ​

Images