CN112097944A - Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism - Google Patents
Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism Download PDFInfo
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- CN112097944A CN112097944A CN202011080145.9A CN202011080145A CN112097944A CN 112097944 A CN112097944 A CN 112097944A CN 202011080145 A CN202011080145 A CN 202011080145A CN 112097944 A CN112097944 A CN 112097944A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/146—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations arrangements for moving thermometers to or from a measuring position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
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Abstract
The device for measuring the ignition distance of the pulverized coal of the cyclone burner based on the crank-slider mechanism comprises a centering type crank-slider mechanism and a sleeve, wherein the sleeve is arranged in a central air duct of the cyclone burner and can move along the central air duct; the centering type crank sliding block mechanism comprises a crank, a connecting rod and a pull rod, wherein one end of the crank is connected with the connecting rod, the connecting rod is connected with the pull rod, and a displacement sensor is arranged on the pull rod. According to the invention, the crank slider mechanism is arranged, the crank rotates to drive the sleeve provided with the thermocouple to do the circular reciprocating motion, the temperature of the nozzle of the combustor can be flexibly tested on line, the ignition distance of the pulverized coal airflow at the outlet of the combustor is measured through the displacement sensor, so that the operation personnel can carry out air distribution optimization and adjustment work in real time, and the combustion stability of the combustor is ensured.
Description
Technical Field
The invention belongs to the field of boiler burners of coal-fired power stations, and particularly relates to a device for measuring the ignition distance of pulverized coal of a cyclone burner based on a slider-crank mechanism.
Background
The main functions of the boiler burner of the coal-fired power plant are to organize the full mixing of fuel and air, timely ignition and stable combustion. The flow properties of the outlet gas stream can be divided into straight-flow burners and swirl burners. The outlet jet flow of the direct-current combustor is non-rotary direct-current jet flow and is generally arranged in a four-corner tangential combustion mode; the outlet jet flow of the cyclone burner rotates and moves forwards in a spiral way at the same time, and is generally arranged in a wall type opposed firing mode. The cyclone burner is composed of a central air nozzle, a pulverized coal nozzle, an inner secondary air channel, an outer secondary air channel and the like, wherein the inner secondary air is set to be direct current or cyclone, the cyclone is arranged in the outer secondary air channel, and the entrainment quantity of high-temperature flue gas at the outlet of the cyclone burner is adjusted by changing the cyclone strength of the inner secondary air and the outer secondary air, so that the ignition distance of the pulverized coal of the cyclone burner can be changed.
In actual operation, the swirl burner easily causes the burning loss problem of a burner nozzle due to the close ignition distance, influences the organization of a burning flow field and has potential safety hazards in burning. Parts such as a cone expander, a stable combustion ring and the like of a part of boiler cyclone combustors fall off seriously, and water wall pipes are crushed or a slag discharge system is in failure after the parts fall off; when a part of boiler cyclone burners are designed, air quantity is not properly distributed, and the burners after operation have the problems of nozzle slagging, burner burning loss and the like; the upper layer combustor of part of the boiler has longer standby time and does not have effective cooling air, so that the nozzle of the combustor is burnt and deformed. The main reasons for burning loss of the nozzle of the cyclone burner are as follows: (1) coal quality of coal is changed during operation, and the air distribution mode (air quantity and rotational flow strength) of secondary air is not adjusted in time according to the change of the coal quality, so that the ignition distance is short, and a nozzle of a combustor is burnt; (2) with the application of the low NOx combustion technology and the SOFA technology, the air inlets of secondary air of a boiler hearth are increased, the differential pressure of the hearth/air box is very small or difficult to maintain, the distribution deviation of the secondary air quantity entering the boiler is increased, and the nozzle of a combustor is easy to burn; (3) the upper layer combustor is positioned in a region with higher combustion heat load of the boiler, and the combustor is burnt and damaged due to insufficient cooling air when the upper layer combustor is standby. The combustion optimization adjustment test is carried out when the solution of the burner nozzle burning loss is adopted, the high-temperature smoke entrainment of the burner is reduced by improving the furnace chamber/air box differential pressure, increasing the central air quantity, changing the secondary air distribution of the cyclone burner and the like, and the ignition distance of the pulverized coal is properly increased; for the upper layer burner, when the upper layer burner is in standby operation, the direct-current cooling air volume of the off-stream burner is increased, and the sufficient central air volume is ensured.
Receive coal market influence at present, most power plant's coal-fired coal quality changes comparatively frequently, if can provide quantitative reference data for the distance of catching fire of on-line test cyclone burner to in time develop center wind, overgrate air distribution adjustment according to the coal quality, keep suitable buggy distance of catching fire, prevent that the combustor from taking place to burn and decrease the problem.
When the traditional cyclone burner organizes pulverized coal combustion, because a measuring device for the ignition distance of the pulverized coal is not equipped, the air distribution adjustment of the burner is generally carried out according to an empirical recommended value or the ignition distance of the pulverized coal is visually observed through a fire observation hole, and the basis for the air distribution adjustment of the burner is lacked.
Disclosure of Invention
The invention aims to provide a device for measuring the ignition distance of pulverized coal of a cyclone burner based on a slider-crank mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme:
the device for measuring the ignition distance of the pulverized coal of the cyclone burner based on the crank-slider mechanism comprises a centering type crank-slider mechanism and a sleeve, wherein the sleeve is arranged in a central air duct of the cyclone burner and can move along the central air duct; the centering type crank sliding block mechanism comprises a crank, a connecting rod and a pull rod, wherein one end of the crank is connected with the connecting rod, the connecting rod is connected with the pull rod, and a displacement sensor is arranged on the pull rod.
The invention is further improved in that one end of the sleeve is provided with a pull fork, and the pull rod is connected with the pull fork.
The invention is further improved in that the pull fork and the sleeve are made of stainless steel.
The invention is further improved in that when the crank, the connecting rod and the pull rod are on a horizontal line and the crank and the connecting rod are overlapped, the thermocouple is flush with the end part of the central air duct of the burner.
The invention is further improved in that the pull rod is marked with scales.
The invention is further improved in that the radial clearance between the sleeve and the central wind tube is 1 mm.
A further improvement of the invention is that the crank is 500mm in length and the maximum distance of horizontal movement of the sleeve is twice the length of the crank.
The invention has the further improvement that the crank is connected with a motor; the air source of the central air duct comes from the self-heating secondary air bellows.
The invention is further improved in that the thermocouple is a k-type thermocouple, and the testing temperature range is 0-1300 ℃.
The invention has the further improvement that when the pull rod linearly and circularly operates, the moving displacement of the pull rod is transmitted to the generator set decentralized control system through the distance sensor; and transmitting the smoke temperature value measured by the thermocouple to a generator set distributed control system through a cable.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, by arranging the crank slider mechanism, the crank rotates to drive the sleeve provided with the thermocouple to do the circular reciprocating motion, so that the temperature of the nozzle of the combustor and the temperature of the flue gas in the horizontal direction 1m of the nozzle outlet of the combustor can be flexibly tested on line. After the sleeve extends out of the nozzle of the burner, when the temperature measured by the thermocouple reaches 800 ℃, the distance between the thermocouple and the nozzle of the burner is the ignition distance of the pulverized coal. According to the invention, the ignition distance of the pulverized coal airflow at the outlet of the burner is measured by the displacement sensor, so that the operation personnel can perform air distribution optimization adjustment work in real time, the combustion stability of the burner is ensured, the phenomenon that the burner is misfired due to the large ignition distance and then the boiler extinguishes is prevented, and the burning loss of the nozzle of the burner due to the close ignition distance is also prevented. The thermocouple is fixed at the end part of the sleeve, so that the problem of inaccurate measurement caused by the fact that the thermocouple flutters along with a flue gas flow field is avoided.
Furthermore, when the crank, the connecting rod and the pull rod are on a horizontal line and the crank is overlapped with the connecting rod, the sleeve provided with the thermocouple is flush with the burner nozzle, the temperature value measured by the thermocouple is the burner nozzle temperature, air distribution adjustment can be timely carried out according to the temperature resistance range of the burner nozzle material, and burning loss of the burner nozzle is prevented.
Furthermore, considering that the ignition distance of the pulverized coal of the cyclone burner is generally 300 mm-500 mm, the length of the crank is 500mm, when the crank rotates circularly, the maximum distance of the sleeve moving horizontally rightwards is twice the length of the crank, namely 1000mm, the ignition distance of the pulverized coal of the cyclone burner is covered, and the extension of the ignition distance of the pulverized coal caused by improper air distribution or coal quality change and the like is considered.
Further, the thermocouple disposed at the end of the sleeve measured a maximum temperature within 1300 c, so that the thermocouple 6 was selected as a k-type thermocouple, and the test temperature range was 0 c to 1300 c.
Furthermore, during crank circular motion, draw fork, sleeve will stretch out outside combustor central dryer, and the temperature is higher here, for preventing draw fork, sleeve and take place to warp because of high temperature, draw fork and sleeve material are high temperature resistant stainless steel.
Further, the radial clearance between the sleeve and the central air duct is 1mm, so that the sleeve can reciprocate in the central air duct.
Drawings
FIG. 1 is a schematic enlarged view of a part of a device for measuring the ignition distance of pulverized coal of a cyclone burner based on a slider-crank mechanism (at a certain angle position in the middle of a crank) according to the present invention;
FIG. 2 is a schematic diagram of a device for measuring the ignition distance of pulverized coal in a cyclone burner based on a slider-crank mechanism (0 degree of initial position of a crank);
FIG. 3 is a schematic diagram of a device for measuring the ignition distance of pulverized coal in a cyclone burner based on a slider-crank mechanism (at an angle position in the middle of a crank) according to the present invention;
FIG. 4 is a schematic diagram of a device for measuring the ignition distance of pulverized coal in a cyclone burner based on a slider-crank mechanism (crank position 180 °) according to the present invention;
FIG. 5 is an elevation view of the swirl burner nozzle of the present invention;
FIG. 6 is a front view of the fork and sleeve of the present invention;
wherein, 1 is a crank, 2 is a connecting rod, 3 is a pull rod, 4 is a pull fork, 5 is a sleeve, 6 is a thermocouple, 7 is a central wind tube, 8 is a cable, 9 is a pulverized coal runner, 10 is an inner secondary wind channel, 11 is an outer secondary wind channel, 12 is a hot secondary wind box, and 13 is a bundle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The ignition process of pulverized coal airflow in the utility boiler is roughly divided into three stages, namely a preparation stage, a combustion stage and a burnout stage before ignition, and the whole process is completed within 2 seconds. The lowest temperature corresponding to the ignition of the coal dust is called the ignition temperature of the coal dust, and the ignition temperature of the coal dust is defined to be more than 800 ℃ in engineering. The general ignition of the pulverized coal stream at the outlet of the cyclone burner is about 300 mm-500 mm away from the burner, and the ignition should not exceed 500mm, but should not be lower than 300 mm.
The crank slider mechanism is composed of the crank, the connecting rod and the pull rod, and the motion state of each part is explained when the crank rotates 360 degrees clockwise.
Referring to fig. 1-6, the swirl burner pulverized coal ignition distance measuring device based on the slider-crank mechanism comprises a slider-crank mechanism and a sleeve 5, wherein the sleeve 5 is arranged in a central air duct 7 and can move along the central air duct 7, one end of the sleeve 5 is connected with the slider-crank mechanism, and the other end of the sleeve 5 is provided with a plurality of thermocouples 6.
Specifically, the slider-crank mechanism includes crank 1, connecting rod 2 and pull rod 3, and 1 one end of crank is fixed, and the other end links to each other with connecting rod 2, and connecting rod 2 links to each other with pull rod 3.
Referring to fig. 6, one end of the sleeve 5 is provided with a pull fork 4, specifically, two ends of the pull fork 4 are fixed on the inner wall of the sleeve 5 by welding, and the pull rod 3 is connected with the pull fork 4.
When the crank 1, the connecting rod 2 and the pull rod 3 are on a horizontal line and the crank 1 is overlapped with the connecting rod 2, the thermocouple 6 is flush with the end part of the central air duct 7 of the burner.
The length of the crank 1 is 500mm and the maximum distance of horizontal movement of the sleeve 5 is twice the length of the crank 1.
Referring to fig. 5, the central wind tunnel 7, the pulverized coal flow passage 9, the inner secondary wind tunnel 10 and the outer secondary wind tunnel 11 form a concentric annular wind tunnel, which is respectively the central wind tunnel 7, the pulverized coal flow passage 9, the inner secondary wind tunnel 10 and the outer secondary wind tunnel 11 from inside to outside. The air source of the central wind cylinder 7 is taken from a hot secondary air wind box 12.
Referring to fig. 1, during initial movement, the crank 1, the connecting rod 2 and the pull rod 3 are on a horizontal line, the crank 1 is located on the leftmost side of the circumference and coincides with the connecting rod 2, the initial position of the crank 1 is marked as 0 °, the sleeve 5 is located in the central air duct 7 of the burner, and the thermocouples 6 arranged at the end of the sleeve 5 are just flush with the end of the central air duct 7 of the burner.
Referring to fig. 2, a 380V motor drives a crank 1 to make circular motion, and a connecting rod 2 swings to realize linear reciprocating motion of a pull rod 3. The pull rod 3 is fixedly connected with the pull fork 4, the pull fork 4 is fixedly connected with the sleeve 5, when the pull rod 3 horizontally moves rightwards under the driving of the crank 1 and the connecting rod 2, the pull rod 3 drives the pull fork 4 and the sleeve 5 to synchronously horizontally move rightwards under the action of thrust, so that the sleeve 5 extends out of a central air duct 7 of the combustor, a plurality of thermocouples 6 arranged at the end part of the sleeve 5 test the temperature changes of different positions of the outlet of the combustor in the horizontal direction in real time in the process, and when the temperature measured by more than 2 thermocouples 6 reaches 800 ℃, the distance between the thermocouples 6 and the nozzle of the combustor is the ignition distance of pulverized coal. Because the pull rod 3, the pull fork 4 and the sleeve 5 are in rigid connection, and the moving directions and the speeds of the pull rod 3, the pull fork 4 and the sleeve 5 are the same, the distance between the thermocouple 6 and the nozzle of the burner is equal to the distance of the pull rod 3 moving horizontally to the right.
Referring to fig. 3 and 4, when the crank 1, the connecting rod 2 and the pull rod 3 are on a horizontal line, the crank 1 is located on the rightmost side of the circumference, the rotation angle of the crank 1 is 180 °, at the moment, the pull rod 3, the pull fork 4 and the sleeve 5 horizontally move rightmost, then along with the continuous rotation of the crank 1, the pull rod 3, the pull fork 4 and the sleeve 5 synchronously horizontally move leftmost, when the crank 2 moves to the leftmost side of the circumference, the crank 1, the connecting rod 2 and the pull rod 3 are on a horizontal line, at the moment, the crank 1 rotates 360 °, the sleeve 5 is completely retracted into the central air duct 7 of the combustor, the thermocouple 6 at the end of the sleeve 5 is flush with the end of the central air duct 7 of the combustor, and at the moment, the temperature tested by the thermocouple 6 is the temperature of.
Furthermore, the crank 1, the connecting rod 2 and the pull rod 3 form a centering type crank slider mechanism, the circle center of the circular motion of the crank 1 and the pull rod 2 are in the same horizontal line, the crank 1 is hinged with the connecting rod 2, the connecting rod 2 is hinged with the pull rod 3, and the pull rod 3 is rigidly connected with the pull fork 4.
Furthermore, considering that the ignition distance of the pulverized coal of the cyclone burner is generally 300 mm-500 mm, the length of the crank 1 is 500mm, and through a crank slider mechanism consisting of the crank 1, the connecting rod 2 and the pull rod 3, when the crank 1 rotates circularly, the maximum distance of the sleeve 5 moving horizontally rightwards is twice of the length of the crank 1, namely 1000mm, the ignition distance of the pulverized coal of the cyclone burner is covered, and the extension of the ignition distance of the pulverized coal caused by improper air distribution or coal quality change and the like is considered.
Further, since the thermocouple 6 disposed at the end of the sleeve 5 measures a maximum temperature within 1300 ℃ when the crank 1 is moved circularly, the thermocouple 6 is selected from a k-type thermocouple, and the measured temperature range is 0 ℃ to 1300 ℃.
Furthermore, when the crank 2 moves circularly, the pull fork 4 and the sleeve 5 extend out of the central air duct 7 of the burner, the temperature is high, and in order to prevent the pull fork 4 and the sleeve 5 from deforming due to high temperature, the pull fork 4 and the sleeve 5 are made of high temperature resistant stainless steel.
Further, the radial clearance between the sleeve 5 and the central air duct 6 is 1mm, so that the sleeve 5 can reciprocate in the central air duct 7.
Furthermore, the pull rod 3 drives the sleeve 5 to do telescopic motion along the axial direction of the central air duct 7 through the pull fork 4, in the process, the thermocouple 6 arranged at the end part of the sleeve 5 measures the temperature of the flue gas, and the measured temperature value of the flue gas is transmitted to the generator set distributed control system through the cable 8 and the clamping piece; the pull rod 3 is provided with scale values, and when the pull rod linearly and circularly operates in a reciprocating mode, the moving displacement of the pull rod is transmitted to a generator set decentralized control system through a distance sensor. Wherein the cable 8 is fixed to the inner wall of the sleeve 5 by means of a binder 13.
Furthermore, the air source of the central air duct 7 is taken from a hot secondary air box 12, and when the sleeve 5 is contracted into the central air duct 7, the hot secondary air provides a cooling air source for the central air duct 7 and the sleeve 5.
The sleeve 2 is horizontally reciprocated by the circular motion of the crank 1, during which the thermocouple 6 disposed at the end of the sleeve 5 measures the change in temperature. When the ignition distance of the pulverized coal is measured to be far, the flame at the outlet of the burner is easy to be misfired and unstable to burn, and at the moment, an operator can properly reduce the opening of the central air door, adjust the opening of the secondary air cyclone, enhance the capacity of absorbing high-temperature flue gas by the secondary air at the outlet of the burner and reduce the ignition distance of the pulverized coal. When the ignition distance of the pulverized coal is relatively short, the nozzle of the burner is easy to deform and burn due to high temperature, and at the moment, the opening degree of a central air door is properly increased by operating personnel, the rotational flow opening degree of secondary air is adjusted, the capacity of absorbing high-temperature smoke by secondary air at the outlet of the burner is weakened, and the ignition distance of the pulverized coal is properly increased.
Claims (10)
1. The device for measuring the ignition distance of the pulverized coal of the cyclone burner based on the crank-slider mechanism is characterized by comprising a centering type crank-slider mechanism and a sleeve (5), wherein the sleeve (5) is arranged in a central air duct (7) of the cyclone burner and can move along the central air duct (7), one end of the sleeve (5) is connected with the crank-slider mechanism, and a plurality of thermocouples (6) are uniformly arranged at the other end of the sleeve (5) in the circumferential direction; the centering type crank sliding block mechanism comprises a crank (1), a connecting rod (2) and a pull rod (3), one end of the crank (1) is connected with the connecting rod (2), the connecting rod (2) is connected with the pull rod (3), and a displacement sensor is arranged on the pull rod (3).
2. The pulverized coal ignition distance measuring device of the cyclone burner based on the slider-crank mechanism as claimed in claim 1, characterized in that one end of the sleeve (5) is provided with a pull fork (4), and the pull rod (3) is connected with the pull fork (4).
3. The device for measuring the pulverized coal ignition distance of the cyclone burner based on the crank-slider mechanism is characterized in that the pull fork (4) and the sleeve (5) are made of stainless steel.
4. The device for measuring the pulverized coal ignition distance of the cyclone burner based on the crank-slider mechanism is characterized in that when the crank (1), the connecting rod (2) and the pull rod (3) are on a horizontal line and the crank (1) is overlapped with the connecting rod (2), the thermocouple (6) is flush with the end part of the central air duct (7) of the burner.
5. The pulverized coal firing distance measuring device of the cyclone burner based on the slider-crank mechanism as claimed in claim 1, wherein the pull rod (3) is marked with a scale.
6. The pulverized coal firing distance measuring device of the cyclone burner based on the crank-slider mechanism as claimed in claim 1, characterized in that the radial clearance between the sleeve (5) and the central wind barrel (7) is 1 mm.
7. A swirl burner pulverized coal ignition distance measuring device based on crank-slider mechanism according to claim 1, characterized in that the length of crank (1) is 500mm and the maximum distance of horizontal movement of sleeve (5) is twice the length of crank (1).
8. The pulverized coal ignition distance measuring device of the cyclone burner based on the crank-slider mechanism is characterized in that a crank (1) is connected with a motor; the air source of the central wind cylinder (7) comes from a self-heating secondary air wind box (12).
9. The pulverized coal ignition distance measuring device of the cyclone burner based on the crank-slider mechanism as claimed in claim 1, characterized in that the thermocouple (6) is a k-type thermocouple, and the test temperature range is 0-1300 ℃.
10. The pulverized coal ignition distance measuring device of the cyclone burner based on the crank-slider mechanism is characterized in that when the pull rod (3) linearly and circularly operates in a reciprocating mode, the moving displacement of the pull rod (3) is transmitted to a generator set decentralized control system through a distance sensor; and transmitting the smoke temperature value measured by the thermocouple (6) to a generator set distributed control system through a cable (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011080145.9A CN112097944A (en) | 2020-10-10 | 2020-10-10 | Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011080145.9A CN112097944A (en) | 2020-10-10 | 2020-10-10 | Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism |
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| CN112097944A true CN112097944A (en) | 2020-12-18 |
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| CN202011080145.9A Pending CN112097944A (en) | 2020-10-10 | 2020-10-10 | Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418206A (en) * | 2021-06-10 | 2021-09-21 | 国网湖南省电力有限公司 | Primary air adjusting method and device based on pulverized coal burner nozzle temperature measurement |
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2020
- 2020-10-10 CN CN202011080145.9A patent/CN112097944A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418206A (en) * | 2021-06-10 | 2021-09-21 | 国网湖南省电力有限公司 | Primary air adjusting method and device based on pulverized coal burner nozzle temperature measurement |
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