Turbulent burner and temperature monitoring and adjusting method for turbulent burner

Abstract

The invention discloses a turbulent burner and a temperature monitoring and adjusting method for the turbulent burner, the turbulent burner comprises an air duct system which extends along a first direction, a burner nozzle is formed at one end of the air duct system, and temperature measuring points are arranged on a central air duct, a primary air duct, an inner secondary air duct and an outer secondary air duct of the air duct system; the plurality of temperature measuring points are arranged at intervals along a first direction, and the burner nozzle is provided with an outlet temperature measuring point; the first temperature sensor is arranged at the temperature measuring point to measure the wall temperature of the air duct system at the temperature measuring point; the control cabinet system is configured to obtain the wall temperature of the outlet temperature measuring point according to the wall temperatures of the plurality of temperature measuring points so as to obtain the outlet temperature of the burner nozzle; the distributed control system is electrically connected with the control cabinet system so as to give an alarm according to the outlet temperature. According to the turbulent burner, the turbulent burner can stably and reliably monitor the outlet temperature of the burner nozzle, and the turbulent burner can be more stable and reliable in the long-term operation process.

Description

Technical Field

[0001] The invention relates to the technical field of burner equipment, and in particular to a swirl burner and a temperature monitoring and adjustment method thereof. Background Art

[0002] With the complexity and volatility of the coal market, especially after imported coal entered the domestic market, the actual coal types used by coal-fired power units have deviated far from the boiler design coal types. For example, high-volatile, high-moisture coal types such as Indonesian coal have a low ignition temperature, small ignition heat required for combustion, and are extremely easy to burn. The pulverized coal airflow at the outlet of the pulverizer is sent into the boiler burner through the primary air duct, and the radiant heat in the boiler furnace will heat the pulverized coal airflow. During the operation of the burner, when the type of pulverized coal sent in changes, the burner fails to adjust the operating parameters in time, and the pulverized coal airflow will burn before it leaves the burner nozzle, thereby causing burner damage.

[0003] In the related art, a temperature sensor is arranged at the burner nozzle to detect the temperature in order to monitor the operating state of the burner. When it is detected that the temperature at the burner nozzle is greater than the ignition temperature of the coal powder, it indicates that the coal powder is burning in the gas burner, and the burner can adjust the operating parameters in time to avoid burner burnout. However, due to the high temperature at the burner nozzle, the temperature sensor arranged at the burner nozzle is prone to measurement failure, which makes the stability and reliability of the temperature at the burner nozzle poor during the long-term operation of the burner, and then makes the burner operation stability and reliability poor, making it difficult to ensure the reliability of the operation of the power equipment. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a swirl burner, which can stably and reliably obtain the temperature at the burner nozzle, so that the swirl burner can stably and reliably adjust the operating parameters in time according to the temperature at the burner nozzle, so that the burner can operate more stably and reliably during long-term operation, so that the operating reliability of the power equipment is well guaranteed.

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

[0006] According to a first aspect of the present invention, a swirl burner comprises: an air duct system, the air duct system extends along a first direction and has a burner nozzle formed at one end, the air duct system comprises a central air duct, a primary air duct, an inner secondary air duct and an outer secondary air duct arranged in sequence from the inside to the outside, the central air duct, the primary air duct, the inner secondary air duct and the outer secondary air duct are all provided with temperature measuring points, a plurality of the temperature measuring points are arranged at intervals along the first direction, and the burner nozzle is provided with an outlet temperature measuring point; a first temperature sensor, a plurality of the first temperature sensors are provided, a plurality of the first temperature sensors are arranged in a one-to-one correspondence with a plurality of the temperature measuring points, the first temperature sensors are arranged at the temperature measuring points to measure the wall temperature of the air duct system at the temperature measuring points; a control cabinet system, a plurality of the first temperature sensors are electrically connected to the control cabinet system, and the control cabinet system is configured to obtain the wall temperature of the outlet temperature measuring point according to the wall temperature of the plurality of the temperature measuring points to obtain the outlet temperature of the burner nozzle; a distributed control system, the distributed control system is electrically connected to the control cabinet system to issue an alarm according to the outlet temperature.

[0007] According to the swirl burner of the present invention, temperature measuring points are set on the central air duct, the primary air duct, the inner secondary air duct and the outer secondary air duct, and the multiple temperature measuring points are arranged at intervals along the first direction. Temperature sensors are set at the temperature measuring points, and the control cabinet system is electrically connected to the multiple first temperature sensors, and the distributed control system is electrically connected to the control cabinet system, so that the control cabinet system can stably and reliably obtain the outlet temperature at the burner nozzle through temperature fitting according to the wall temperature obtained at each temperature measuring point, so that the swirl burner can stably and reliably monitor the outlet temperature of the burner nozzle during long-term operation, and the distributed control system can promptly issue an alarm when the outlet temperature of the burner nozzle is abnormal, so that the operating personnel can adjust the operating parameters of the swirl burner in time, thereby greatly reducing the probability of burning of the burner nozzle, so that the swirl burner can be more stable and reliable during long-term operation, and thus the operating reliability of the power equipment is well guaranteed.

[0008] In some embodiments of the present invention, the temperature measuring points are respectively arranged on the outer walls of the central air duct, the primary air duct, the inner secondary air duct and the outer secondary air duct, and the air duct system also includes a sleeve, and the number of the sleeves is multiple, and the multiple sleeves 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, and the multiple sleeves are arranged one-to-one with the multiple first temperature sensors, and the first temperature sensor is arranged in the sleeve.

[0009] In one embodiment of the present invention, the swirl burner also includes an air supply system, which includes a fan. One end of the sleeve is fixedly connected to the outer wall, and the other end of the sleeve is connected to the air outlet of the fan. The fan is 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. The number of the first temperature measuring points is multiple, and the multiple first temperature measuring points are arranged at intervals along the circumference of the central air duct. The number of the second temperature measuring points is multiple, and the multiple second temperature measuring points are arranged at intervals along the circumference of the primary air duct. The number of the third temperature measuring points is multiple, and the multiple third temperature measuring points are arranged at intervals along the circumference of the inner secondary air duct. The number of the fourth temperature measuring points is multiple, and the multiple fourth temperature measuring points are 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, and the second temperature sensor is disposed at the outlet temperature measuring point.

[0013] According to the second aspect of the present invention, the temperature monitoring and adjustment method is used for the swirl burner according to the first aspect of the present invention, and the temperature monitoring and adjustment method includes: obtaining the wall temperature values ​​of the air duct system at multiple temperature measurement points to form a wall temperature fitting curve; obtaining the outlet temperature of the burner nozzle according to the wall temperature fitting curve; when the outlet temperature is greater than the theoretical ignition temperature of the coal powder, the distributed control system alarms; adjusts the operating parameters of the swirl burner; when the outlet temperature is less than the theoretical ignition temperature of the coal powder, and the difference between the outlet temperature and the theoretical ignition temperature of the coal powder is a first preset value, the distributed control system stops the alarm.

[0014] According to the temperature monitoring and adjustment method of the present invention, through the swirl burner used in the above-mentioned first aspect, the wall temperature values ​​of multiple temperature measuring points are obtained to form a wall temperature fitting curve, thereby obtaining the outlet temperature of the burner nozzle, so that the swirl burner can stably and reliably monitor the outlet temperature of the burner nozzle during long-term operation, and the distributed control system can promptly issue an alarm when the outlet temperature of the burner nozzle is abnormal, so that the operating personnel can adjust the operating parameters of the swirl burner in time, thereby greatly reducing the probability of burnout of the burner nozzle, making the swirl burner more stable and reliable during long-term operation, thereby ensuring the operating reliability of the power equipment.

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

[0016] In some embodiments of the present invention, before obtaining the wall temperature values ​​of the air duct system at multiple temperature measurement points to form a wall temperature fitting curve, the temperature monitoring and adjustment method also includes: the control cabinet system enters the coal quality parameters of the coal powder, and the coal quality parameters include: dry ash-free basis volatile matter, air-dried basis ash and air-dried basis moisture; and calculates the theoretical ignition temperature of the coal powder according to the ignition temperature calculation formula.

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

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0022] Reference numerals:

[0023] 10. Air duct system; 101. Burner nozzle; 102. Temperature measuring point; 103. Outlet temperature measuring point; 104. Casing;

[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. A first temperature sensor;

[0027] 100. Swirl burner. DETAILED DESCRIPTION

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

[0029] Reference below Figure 1-Figure 3 A swirl burner 100 according to an embodiment of the first aspect of the present invention will be described.

[0030] like Figure 1-Figure 3 As shown, the swirl burner 100 according to the first 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 arranged along a first direction (eg Figure 1 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 are arranged in sequence from the inside to the outside. The central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14 are all provided with temperature measuring points 102. The 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. The first temperature sensor 40 is provided with a plurality of first temperature sensors. The sensors 40 are arranged in one-to-one correspondence with the multiple temperature measuring points 102, and 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, and the control cabinet system 20 is configured to obtain the wall temperature of the outlet temperature measuring point 103 according to the wall temperatures of the multiple temperature measuring points 102 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 according to 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 as a channel for ignition gas. The air introduced into the central air duct 11 can play a role in adjusting the air volume and changing the position of the reflow area in the furnace chamber, so that the coal powder can be better burned in the furnace chamber. The primary air duct 12 can be used to transmit the coal powder airflow, so that the coal powder airflow can be smoothly ejected from the burner nozzle 101 along the primary air duct 12 to the furnace chamber for combustion, and provide part of the oxygen for the coal powder combustion. The inner secondary air duct 13 and the outer secondary air duct 14 can be used to transport the oxygen required for the combustion of coal powder. The inner secondary air duct 13 and the outer secondary air duct 14 can cooperate to supply air to the furnace chamber in stages, thereby reducing the emission of nitrogen oxides to a certain extent. In this embodiment, the central air duct 11 , the primary air duct 12 , the inner secondary air duct 13 and the outer secondary air duct 14 of the air duct system 10 are arranged in sequence from the inside to the outside, which can well meet the operation and use requirements of the swirl burner 100 .

[0033] In this embodiment, temperature measuring points 102 are provided in the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14. The multiple temperature measuring points 102 are arranged at intervals along the first direction. The air duct system 10 extends along the first direction and forms a burner nozzle 101 at one end. Then, the multiple temperature measuring points 102 are arranged at intervals along the coal powder airflow and the conveying direction of the air in the air duct system 10. The 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, so as to obtain the wall temperature of the air duct system 10 at each temperature measuring point 102 in the first direction, so as to determine the temperature conditions of the air duct system 10 at different positions along the first direction when the swirl burner 100 is running.

[0034] It can be understood that the burner nozzle 101 of the air duct system 10 is connected to the furnace cavity, and the radiant heat when the coal powder in the furnace cavity is burned will be transferred to the air and the coal powder airflow along each air duct in the air duct system 10, so that the temperature in the air duct system 10 closer to the burner nozzle 101 along the first direction is higher. In this embodiment, multiple temperature measuring points 102 are set along the first direction, and the first temperature sensor 40 is arranged to obtain the temperature of the 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 according to the wall temperature of the multiple temperature measuring points 102. Since the temperature measuring points 102 arranged in the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14 are far away from the burner nozzle 101, the first temperature sensor 40 is not prone to temperature measurement failure due to high temperature, so that the control cabinet system 20 can stably and reliably obtain the wall temperature at each temperature measuring point 102, and then the temperature at the outlet temperature measuring point 103 at the burner nozzle 101 can be stably and reliably deduced through temperature fitting, and the outlet temperature of the burner nozzle 101 can be obtained, thereby enabling the swirl burner 100 to stably and reliably monitor the outlet temperature of the swirl burner 100 during operation.

[0035] In the present embodiment, a distributed control system 30 is electrically connected to the control cabinet system 20, and the distributed control system 30 issues an alarm according to the outlet temperature. For example, when the control cabinet system 20 monitors that the outlet temperature of the burner nozzle 101 is greater than the ignition temperature of the pulverized coal airflow, it can be learned that the pulverized coal airflow is in premature combustion, the pulverized coal airflow is ignited and burned before it leaves the burner nozzle 101, and the pulverized coal airflow burns in the primary air duct 12 of the air duct system 10, and there is a risk of burning the burner nozzle 101. At this time, the distributed control system 30 can issue an alarm so that the operating personnel can adjust the operating parameters of the swirl burner 100 in time, so that the combustion position of the pulverized coal airflow can be adjusted to the furnace cavity, so that the swirl burner 100 can continue to operate stably and reliably. When the control cabinet system 20 monitors that the outlet temperature of the burner nozzle 101 is lower than the ignition temperature of the pulverized coal airflow, the distributed control system 30 does not issue an alarm. As a result, the swirl burner 100 can operate stably and reliably during long-term operation, thereby ensuring the operating reliability of the power equipment.

[0036] In this embodiment, a plurality of temperature measuring points 102 are arranged in the air duct system 10 along the first direction. When the pulverized coal airflow is burned in advance, the control cabinet system 20 can also make a more accurate judgment on the position of the pulverized coal airflow burning in the air duct system 10 according to the temperature obtained by the temperature measuring point 102, so that the operating personnel can better adjust the operating parameters of the swirl burner 100 more accurately and meticulously, which can improve the operating personnel's adjustment efficiency of the operating parameters of the swirl burner 100 to a certain extent, so that the swirl burner 100 can be restored to a normal operating state more quickly, so that the operating stability and reliability of the swirl burner 100 are better, thereby well ensuring the operating reliability of the power equipment.

[0037] According to the swirl burner 100 of the embodiment of the present invention, temperature measuring points 102 are set on the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14, and the plurality of temperature measuring points 102 are arranged at intervals along the first direction, and temperature sensors are set at the temperature measuring points 102. The control cabinet system 20 is electrically connected to the plurality of first temperature sensors 40, and the distributed control system 30 is electrically connected to the control cabinet system 20, so that the control cabinet system 20 can stably and reliably obtain the wall temperature of the burner through temperature fitting according to the wall temperature obtained at each temperature measuring point 102. The outlet temperature at the burner nozzle 101 can be monitored stably and reliably by the swirl burner 100 during long-term operation, so that the distributed control system 30 can promptly issue an alarm when the outlet temperature of the burner nozzle 101 is abnormal, so that the operating personnel can promptly adjust the operating parameters of the swirl burner 100, thereby greatly reducing the probability of burning of the burner nozzle 101, making the swirl burner 100 more stable and reliable during long-term operation, thereby ensuring the operating reliability of the power equipment.

[0038] In some embodiments of the present invention, reference Figure 1 and Figure 2 As shown, the temperature measuring points 102 can be respectively arranged 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 a sleeve 104. The number of the sleeves 104 is multiple. The 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. The multiple sleeves 104 are arranged one-to-one with the multiple first temperature sensors 40, and the first temperature sensor 40 is arranged in the sleeve 104.

[0039] In the present embodiment, the 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, so as to facilitate the arrangement of the first temperature sensor 40 at the temperature measuring points 102, so that it is more convenient 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, and the first temperature sensor 40 can be in a good operating environment, so that the first temperature sensor 40 can stably perform temperature measurement.

[0040] In this embodiment, the air duct system 10 is further provided with a sleeve 104, and the 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. The first temperature sensor 40 is arranged in the sleeve 104. The structure is simple. The sleeve 104 can play a good protective role for the first temperature sensor 40 to prevent 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, so that the swirl burner 100 can more stably and reliably obtain the outlet temperature at the burner nozzle 101.

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

[0042] In this embodiment, a fan is provided to introduce cooling air into the sleeve 104, which has a simple structure. The cooling air can play a good role in cooling the space in the sleeve 104, so that the first temperature sensor 40 can be in a better operating environment, reducing the probability of damage or failure of the first temperature sensor 40 due to the high temperature environment, so that the first temperature sensor 40 can operate more stably and reliably, so that the swirl burner 100 can more stably and reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, so that the swirl burner 100 can operate more stably and reliably. Optionally, one end of the plurality of sleeves 104 can be respectively welded to the outer wall of the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14, so that the installation and fixation of the sleeve 104 on the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14 are more secure.

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

[0044] In this embodiment, the temperature measuring point 102 on the central air duct 11 is formed as a first temperature measuring point and a plurality of the first temperature measuring points are arranged at intervals along the circumference of the central air duct 11. The temperature data obtained by the plurality of first temperature measuring points can be used as a reference to each other, thereby reducing the measurement error and making the wall temperature obtained by the temperature measuring point 102 on the central air duct 11 more accurate, so that the control cabinet system 20 obtains the outlet temperature of the burner nozzle 101 when using the temperature of the first temperature measuring point to deduce the outlet temperature of the burner nozzle 101. The outlet temperature value obtained is closer to the actual temperature, so that the swirl burner 100 can more accurately monitor the condition of the burner nozzle 101. At the same time, the plurality of first temperature measuring points can play a certain redundant role in the temperature measurement of the central air duct 11, so that when one of the plurality of first temperature measuring points fails, the remaining first temperature measuring points can still stably measure the wall temperature, thereby greatly improving the stability of the temperature measurement during the operation of the swirl burner 100, so that the swirl burner 100 can more stably and reliably monitor the outlet temperature of the burner nozzle 101, so that the swirl burner 100 can operate more stably and reliably.

[0045] In the present embodiment, a plurality of second temperature measuring points are arranged on the primary air duct 12, and the plurality of second temperature measuring points are arranged at intervals along the circumference of the primary air duct 12, with a simple structure, which can well 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, and a plurality of third temperature measuring points are arranged on the inner secondary air duct 13, and the plurality of third temperature measuring points are arranged at intervals along the circumference of the inner secondary air duct 13, with a simple structure, which can well 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 the present embodiment, a plurality of fourth temperature measuring points are arranged on the outer secondary air duct 14, and the plurality of fourth temperature measuring points are arranged at intervals along the circumference of the outer secondary air duct 14, with a simple structure, and can well 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 first direction of the outer secondary air duct 14. The control cabinet system 20 can stably and reliably form a more accurate wall temperature fitting curve based on the wall temperatures obtained by the plurality of first temperature measuring points, the plurality of second temperature measuring points, the plurality of third temperature measuring points and the plurality of fourth temperature measuring points, so that the obtained outlet temperature of the burner nozzle 101 is more accurate, and the control cabinet system 20 can monitor the outlet temperature of the burner nozzle 101 more stably and reliably, thereby improving the accuracy of the distributed control system 30 when giving an alarm to a certain extent, and making 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 the temperature detection error and enable the first temperature sensor 40 to obtain the wall temperature more accurately at the multiple temperature measuring points 102 arranged along the first direction in the air duct system 10.

[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 can facilitate the position arrangement of the temperature measuring point 102 and the installation arrangement 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 the present embodiment, the first temperature sensor 40 is set as a platinum-rhodium thermocouple. The platinum-rhodium thermocouple has the advantages of high temperature measurement accuracy, high temperature resistance, excellent anti-oxidation ability under high temperature conditions, a wide temperature application range, and a long service life. It 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, so that the swirl burner 100 can 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 Figure 1 As shown, the swirl burner 100 may further include a second temperature sensor, which is disposed at the outlet temperature measuring point 103 .

[0052] In this embodiment, a second temperature sensor is provided at the outlet temperature measuring point 103. When the second temperature sensor is in normal operation, the second temperature sensor can directly measure the outlet wall temperature of the burner nozzle 101, thereby obtaining the outlet temperature of the burner nozzle 101. This makes it easy for the control cabinet system 20 to obtain 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 according to the wall temperature obtained at multiple temperature measuring points 102, so that the control cabinet system 20 can adaptively correct the derivation of the outlet temperature, so that the outlet temperature obtained by the control cabinet system 20 according to multiple temperature measuring points 102 can be more in line with the actual outlet temperature, thereby improving the monitoring accuracy of the outlet temperature of the burner nozzle 101 during the long-term operation of the swirl burner 100, so that the swirl burner 100 can better obtain the accurate outlet temperature, so that the swirl burner 100 can 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 multiple. The multiple outlet temperature measuring points 103 are arranged at circumferential intervals along 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 sensor can also be arranged in the sleeve 104, so that the multiple second temperature sensors can cooperate to detect the outlet temperature of the burner nozzle 101 more stably and reliably.

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

[0055] In this embodiment, a swirl blade 131 is provided in the inner secondary air duct 13. The swirl blade 131 is arranged at one end away from the burner nozzle 101, that is, at the air inlet end of the inner secondary air duct 13. After the airflow enters the inner secondary air duct 13, it forms a swirl flow through the swirl blade 131 and flows into the furnace cavity of the combustion chamber, so that the air and the coal powder can be fully mixed, so that the coal powder airflow can be efficiently burned in the furnace cavity, which well meets the operation and use needs of the swirl combustion chamber.

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

[0057] Reference below Figure 1-Figure 3 A temperature monitoring and adjustment method according to an embodiment of the 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 for the swirl burner 100 according to the first aspect of the embodiment of the present invention, and the temperature monitoring and adjustment method includes: obtaining the wall temperature values ​​of the air duct system 10 at multiple temperature measurement 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 coal powder, the distributed control system 30 alarms; adjusts the operating parameters of the swirl burner 100; when the outlet temperature is less than the theoretical ignition temperature of the coal powder, and the difference between the outlet temperature and the theoretical ignition temperature of the coal powder is a first preset value, the distributed control system 30 stops the alarm.

[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, so that the wall temperature at the outlet temperature measuring point 103 located at the burner nozzle 101 can be derived 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 the coal powder, it means that the coal powder airflow has ignited and burned before flowing out of the burner nozzle 101. At this time, there is a risk of burning of the burner nozzle 101, and the primary air duct 12 may be blocked by coke blocks due to the combustion of coal powder. The distributed control system 30 alarms. For example, the distributed control system 30 can use sound and light alarms to alert the operating personnel, so that the operating personnel can be informed in time if there is a problem with the operating status of the swirl burner 100, so that the operating personnel can deal with it in time.

[0061] After the distributed control system 30 alarms, the operating personnel can adjust the operating parameters of the swirl burner 100 and change the ignition and combustion position of the coal powder airflow, so as to avoid problems such as burning of the burner nozzle 101 when the swirl burner 100 continues to operate abnormally, so that the swirl burner 100 can maintain a stable and reliable operating state and continue to operate, so 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 coal powder, and the difference between the outlet temperature and the theoretical ignition temperature of the coal powder is a first preset value, it means that the coal powder airflow burns after flowing out of the burner nozzle 101, and the swirl burner 100 is in a normal operating state. At this time, the distributed control system 30 stops the alarm, and the swirl burner 100 can operate normally.

[0063] It can be understood that in this embodiment, the wall temperature obtained by multiple temperature measuring points 102 forms a wall temperature fitting curve, thereby deducing the outlet temperature of the burner nozzle 101. There is a certain deviation between the obtained outlet temperature and the actual outlet temperature at the burner nozzle 101, and there is a certain deviation between the theoretical ignition temperature of coal powder and the actual ignition temperature of the coal powder airflow. 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 coal powder is a first preset value, which can well ensure that after the operating parameters of the swirl burner 100 are adjusted, the ignition position of the coal powder airflow is outside the burner nozzle 101, thereby stably and reliably preventing the burner nozzle 101 from burning and the like, so that the swirl burner 100 can be stably and reliably restored to a normal operating state after the operating parameters are adjusted.

[0064] The temperature monitoring and adjustment method of this embodiment is used for the swirl burner 100 according to the first aspect of the embodiment of the present invention. By acquiring the wall temperature values ​​of multiple temperature measuring points 102, a wall temperature fitting curve is formed to obtain the outlet temperature of the burner nozzle 101, so that the swirl burner 100 can stably and reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, and the distributed control system 30 can promptly issue an alarm when the outlet temperature of the burner nozzle 101 is abnormal, so that the operating personnel can promptly adjust the operating parameters of the swirl burner 100, thereby greatly reducing the probability of burning of the burner nozzle 101, so that the swirl burner 100 can be more stable and reliable during long-term operation, thereby ensuring the operating reliability of the power equipment.

[0065] In some embodiments of the present invention, the first preset value may be 10° C. In this embodiment, the first preset value is set to 10° C., and when the outlet temperature drops to a difference of less than 10° C. from the theoretical ignition temperature of the pulverized coal, the distributed control system 30 may stop the alarm, and the swirl burner 100 is in a normal operating state at this time, which can well ensure the smooth operation of the swirl burner 100, and enable the operator to stably meet the adjustment needs by adjusting the operating parameters.

[0066] In some embodiments of the present invention, the operating parameters may include: the air flow 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 air flow velocity in the primary air duct 12, the damper opening of the central air duct 11 and the outlet air temperature of the pulverizer. When the coal powder ignites and burns prematurely in the swirl burner 100, the operator can increase the air flow velocity in the primary air duct 12 so that the coal powder airflow can flow out of the primary air duct 12 to the burner nozzle 101 more quickly, thereby moving the position where the coal powder ignites and burns toward the burner nozzle 101. The operator can also increase the damper opening of the central air duct 11 to increase the air flow rate in the central air duct 11.

[0068] In this way, the airflow at the burner nozzle 101 can be improved to a certain extent, so that the coal powder airflow can more easily flow toward the furnace cavity of the burner nozzle 101, so that the ignition and combustion position of the coal powder airflow can move toward the burner nozzle 101, and the operating personnel can also reduce the outlet air temperature of the coal mill to reduce the temperature of the coal powder airflow entering the primary air duct 12, thereby changing the delay of the coal powder airflow flowing along the air duct system 10 to increase the temperature to the ignition temperature of the coal powder, and then the ignition and combustion position of the coal powder airflow moves toward the burner nozzle 101. The operating personnel can make timely adjustments to various operating parameters as needed, so that the ignition and combustion position of the coal powder airflow is in the furnace cavity outside the burner nozzle 101 to perform the combustion operation normally, so that the swirl burner 100 can be in a normal operating state. Of course, the operating parameters can also include other parameters, such as the damper opening of the inner secondary air duct 13, the air flow velocity, the change of coal type, etc., which are not listed here one by one.

[0069] In some embodiments of the present invention, the first preset value is 10° C., and the operating parameters include: the air flow 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°C, and the operating parameters include the air flow 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, so that the distributed control system 30 can cooperate with the control cabinet system 20 to stably and reliably monitor and alarm the outlet temperature of the burner nozzle 101, so that the operating personnel can adjust the operating parameters of the swirl burner 100 well to efficiently adjust the swirl burner 100 to a normal operating state, thereby making the swirl burner 100 more stable and reliable during long-term operation.

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

[0072] It is understandable that during the operation of the swirl burner 100, the abnormality of the coal powder airflow igniting and burning before the burner nozzle 101 usually occurs after the swirl burner 100 changes the type of coal to be burned, for example, after the type of blended coal is changed. Since the ignition temperature of the replaced coal type changes, the operating parameters of the swirl burner 100 cannot match the combustion requirements of the new coal type well. For example, when the ignition temperature of the replaced coal type is relatively low, the introduced coal powder airflow is likely to ignite and burn before the burner nozzle 101.

[0073] In this embodiment, before obtaining the wall temperature values ​​of multiple temperature measurement points 102 of the air duct system 10 to form a wall temperature fitting curve, the control cabinet system 20 enters the coal quality parameters of the coal powder and obtains the theoretical ignition temperature of the coal powder according to the ignition temperature calculation formula, so that the control cabinet system 20 can compare the obtained outlet temperature of the burner nozzle 101 with the theoretical ignition temperature corresponding to the coal powder introduced at this time, so that the outlet temperature of the burner nozzle 101 can be stably and correctly judged, and then it can be ensured that the size of the obtained outlet temperature and the theoretical ignition temperature can reliably reflect the location of the ignition and combustion of the coal powder airflow, thereby reducing the probability of false alarms in the distributed control system 30, so that the control cabinet system 20 and the distributed control system 30 can cooperate to stably and reliably monitor and alarm the outlet temperature of the burner nozzle 101, so that the swirl burner 100 can operate more stably and reliably.

[0074] The ignition temperature calculation formula in this embodiment is Td=654-1.9Vdaf+0.43Aad-4, wherein Td represents the theoretical ignition temperature of the coal type, that is, the theoretical ignition temperature of the coal powder, 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 blended into the swirl burner 100 changes, the operator can input the coal quality parameters of the blended coal into the control cabinet system 20, so that the control cabinet system 20 can obtain the theoretical ignition temperature of the blended coal, and then provide accurate reference data for subsequent burner nozzle 101 temperature monitoring and distributed control system 30 alarm. For example, the control cabinet system 20 can save the coal quality parameters entered each time, so that during the long-term operation of the swirl burner 100, the operator only needs to switch the corresponding coal quality parameters on the dial of the distributed control system 30, thereby simplifying the entry operation and improving the entry efficiency. To a certain extent, the operation efficiency of the control cabinet system 20 and the distributed control system 30 can be improved.

[0076] In some embodiments of the present invention, Figure 3 As shown, after obtaining the outlet temperature of the burner nozzle 101 according to 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 the coal powder, the distributed control system 30 does not alarm.

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

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

[0079] like Figure 1-Figure 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 extending in a first direction and arranged in sequence from the inside to the outside. One end of the air duct system 10 is formed as a burner nozzle 101. Temperature measuring points 102 are arranged 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, and there are multiple temperature measuring points 102 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 side. A sleeve 104 is arranged at the temperature measuring point 102, 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 arranged in the sleeve 104 to detect the wall temperature of each air duct at the temperature measuring point 102, and the first temperature sensor 40 is electrically connected to the control cabinet system 20. The inner secondary air duct 13 is provided with swirl blades 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 pass cooling air into the sleeve 104, and the cooling air can flow out of the sleeve 104, so that the cooling air can be continuously passed 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 that are connected. 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 in the sleeve 104 can be bent and extended in the extension direction of the sleeve 104, thereby further reducing the probability of smoke and dust entering the sleeve 104, so that the first temperature sensor 40 can perform temperature detection more stably.

[0082] An outlet temperature measuring point 103 is provided on the outer wall of the burner nozzle 101 , 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 arranged in the outlet temperature measuring sleeve 104 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 of multiple temperature measuring points 102 and the second temperature sensor of the outlet temperature measuring point 103, so as to comprehensively monitor the temperature change state of each position along the first direction when the air duct system 10 is in operation. This can, to a certain extent, facilitate more accurate adjustment of the operating parameters of the swirl burner 100 according to the temperature conditions, so that the coal powder airflow and the air flow can better meet the needs of coal powder combustion, so that the coal powder combustion can be in a better combustion state.

[0084] In this embodiment, a plurality of temperature measuring points 102 are arranged along a first direction on the air duct system 10. The wall temperature data obtained at the plurality of temperature measuring points 102 can be verified with each other, thereby effectively reducing the influence of the swirl burner 100 in a harsh operating condition on the acquisition of the outlet temperature at the burner nozzle 101, so that the control cabinet system 20 can obtain the outlet temperature of the burner nozzle 101 more stably and reliably, so that 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 by multiple temperature measuring points 102, so that the outlet temperature of the burner nozzle 101 can be stably and reliably monitored. When the outlet temperature is greater than the ignition temperature of the coal powder, the dial alarm system of the distributed control system 30 can force an alarm, so that the operating personnel can promptly understand the abnormal information, so that the operating personnel can promptly adjust the operating parameters of the swirl burner 100, so that the swirl burner 100 can be restored to a normal operating state in time, thereby improving the operating stability and reliability of the swirl burner 100, and thus providing a good guarantee for the stable operation of the power equipment.

[0086] In this embodiment, the outlet temperature of the burner nozzle 101 is obtained and compared with the theoretical ignition temperature of the coal powder to determine the ignition position of the coal powder airflow, so that the ignition position of the coal powder airflow can be more intuitively expressed through the temperature distribution in the air duct system 10, and the distributed control system 30 alarm is used to promptly remind the operating personnel, so that during the operation of the swirl burner 100, especially after a significant change in the type of coal, the operating personnel can adjust the operating parameters of the swirl burner 100 in time, thereby greatly reducing the possibility of burning of the burner nozzle 101, improving the operating safety and stability of the swirl burner 100, and thus ensuring the operating stability and reliability of the power equipment.

[0087] According to the swirl burner 100 of the present invention, by setting temperature measuring points 102 on the central air duct 11, the primary air duct 12, the inner secondary air duct 13 and the outer secondary air duct 14, the multiple temperature measuring points 102 are arranged at intervals along the first direction, and temperature sensors are provided at the temperature measuring points 102. The control cabinet system 20 is electrically connected to the multiple first temperature sensors 40, and the distributed control system 30 is electrically connected to the control cabinet system 20, so that the control cabinet system 20 can stably and reliably obtain the outlet temperature at the burner nozzle 101 through temperature fitting according to the wall temperature obtained by each temperature measuring point 102, so that the swirl burner 100 can stably and reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, and the distributed control system 30 can promptly issue an alarm when the outlet temperature of the burner nozzle 101 is abnormal, so that the operating personnel can promptly adjust the operating parameters of the swirl burner 100, thereby greatly reducing the probability of burning of the burner nozzle 101, so that the swirl burner 100 can be more stable and reliable during long-term operation, and thus the operating reliability of the power equipment is well guaranteed.

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

[0089] like Figure 1-Figure 3 As shown, when the swirl burner 100 is operating, when the coal powder is first introduced into the primary air duct 12 or when the type of the introduced coal powder is changed, the operator enters the coal quality parameters of the coal powder in the control cabinet system 20, and the control cabinet system 20 obtains the theoretical ignition temperature of the coal powder according to the ignition temperature calculation formula. The control cabinet system 20 obtains the wall temperature values ​​of multiple temperature measurement points 102 and forms a wall temperature fitting curve. By way of example, the wall temperature fitting curve can be displayed on the dial 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 according to the wall temperature fitting curve. When the outlet temperature is greater than the theoretical ignition temperature, it means that the operating parameters at this time do not match the current coal powder airflow introduction and combustion needs. The coal powder airflow ignites and burns before it leaves the burner nozzle 101. At this time, the swirl burner 100 has the risk of burnout of the burner nozzle 101. The distributed control system 30 can make an online alarm through the dial screen, and the operating personnel adjust the operating parameters of the swirl burner 100. When the outlet temperature drops and is less than the theoretical ignition temperature and the difference with the theoretical ignition temperature is a first preset value, the distributed control system 30 stops the alarm, indicating that the swirl burner 100 is in a safe and stable normal operating state at this time; when the outlet temperature is less than the theoretical ignition temperature, it means that the coal powder airflow is not burning in the swirl burner 100 at this time, and 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 at this time.

[0091] According to the temperature monitoring and adjustment method of the embodiment of the present invention, through the swirl burner 100 used in the above-mentioned first aspect, the wall temperature values ​​of multiple temperature measuring points 102 are obtained to form a wall temperature fitting curve, thereby obtaining the outlet temperature of the burner nozzle 101, so that the swirl burner 100 can stably and reliably monitor the outlet temperature of the burner nozzle 101 during long-term operation, and the distributed control system 30 can promptly issue an alarm when the outlet temperature of the burner nozzle 101 is abnormal, so that the operating personnel can promptly adjust the operating parameters of the swirl burner 100, thereby greatly reducing the probability of burning of the burner nozzle 101, so that the swirl burner 100 can be more stable and reliable during long-term operation, and thus the operating reliability of the power equipment is well guaranteed.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0094] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A swirl burner, characterized in that: include: An air duct system (10), the air duct system (10) extending along a first direction and having a burner nozzle (101) formed at one end, the air duct system (10) comprising a central air duct (11), a primary air duct (12), an inner secondary air duct (13) and an outer secondary air duct (14) arranged in sequence from the inside to the outside, the central air duct (11), the primary air duct (12), the inner secondary air duct (13) and the outer secondary air duct (14) are all provided with temperature measuring points (102), a plurality of the temperature measuring points (102) are arranged at intervals along the first direction, and the burner nozzle (101) is provided with an outlet temperature measuring point (103); a first temperature sensor (40), wherein a plurality of the first temperature sensors (40) are provided, and the plurality of the first temperature sensors (40) are arranged in a one-to-one correspondence with the plurality of the temperature measuring points (102), and 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); A control cabinet system (20), wherein a plurality of the first temperature sensors (40) are electrically connected to the control cabinet system (20), and the control cabinet system (20) is configured to obtain the wall temperature of the outlet temperature measuring point (103) according to the wall temperatures of the plurality of temperature measuring points (102), so as to obtain the outlet temperature of the burner nozzle (101); A distributed control system (30) is electrically connected to the control cabinet system (20) to issue an alarm according to the outlet temperature.

2. The swirl burner according to claim 1, characterized in that: The temperature measuring points (102) are respectively arranged 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) further comprises a sleeve (104); the sleeves (104) are in plurality; the plurality of 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); the plurality of sleeves (104) are arranged in one-to-one correspondence with the plurality of first temperature sensors (40); and the first temperature sensor (40) is arranged in the sleeve (104).

3. The swirl burner according to claim 2, characterized in that: It also includes an air supply system, which includes a fan. One end of the sleeve (104) is fixedly connected to the outer wall, and the other end of the sleeve (104) is connected to the air outlet of the fan. The fan is configured to introduce cooling air into the sleeve (104).

4. The swirl burner according to any one of claims 1 to 3, characterized in that: The temperature measuring point (102) on the central air duct (11) is formed as a first temperature measuring point, the temperature measuring point (102) on the primary air duct (12) is formed as a second temperature measuring point, the temperature measuring point (102) on the inner secondary air duct (13) is formed as a third temperature measuring point, and the temperature measuring point (102) on the outer secondary air duct (14) is formed as a fourth temperature measuring point, The number of the first temperature measuring points is multiple, and the multiple first temperature measuring points are arranged at intervals along the circumference of the central air duct (11); the number of the second temperature measuring points is multiple, and the multiple second temperature measuring points are arranged at intervals along the circumference of the primary air duct (12); the number of the third temperature measuring points is multiple, and the multiple third temperature measuring points are arranged at intervals along the circumference of the inner secondary air duct (13); the number of the fourth temperature measuring points is multiple, and the multiple fourth temperature measuring points are arranged at intervals along the circumference of the outer secondary air duct (14).

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

6. The swirl burner according to claim 1, characterized in that: It also includes a second temperature sensor, which is arranged at the outlet temperature measurement point (103).

7. A temperature monitoring and adjustment method, characterized in that: For the swirl burner according to any one of claims 1 to 6, the temperature monitoring and adjustment method comprises: Obtaining wall temperature values ​​of the air duct system (10) at a plurality of temperature measurement 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 coal powder, the distributed control system (30) issues an alarm; adjusting the operating parameters of the swirl burner; When the outlet temperature is lower than the theoretical ignition temperature of the coal powder, and the difference between the outlet temperature and the theoretical ignition temperature of the coal powder is a first preset value, the distributed control system (30) stops alarming.

8. The temperature monitoring and adjustment method according to claim 7, characterized in that: The first preset value is 10° C., and / or the operating parameters include: the air flow velocity in the primary air duct (12), the air door opening of the central air duct (11) and the coal mill outlet air temperature.

9. The temperature monitoring and adjustment method according to claim 7, characterized in that: Before obtaining the wall temperature values ​​of the air duct system (10) at the plurality of temperature measurement points (102) to form a wall temperature fitting curve, the temperature monitoring and adjustment method further comprises: The control cabinet system (20) inputs coal quality parameters of the coal powder, wherein the coal quality parameters include: volatile matter on a dry ash-free basis, ash on an air-dried basis, and moisture on an air-dried basis; The theoretical ignition temperature of pulverized coal is calculated according to the ignition temperature calculation formula.

10. The temperature monitoring and adjustment method according to claim 7, characterized in that: After the outlet temperature of the burner nozzle (101) is obtained according to the wall temperature fitting curve, the temperature monitoring and adjustment method further comprises: when the outlet temperature is less than the theoretical ignition temperature of the coal powder, the distributed control system (30) does not sound an alarm.

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