Intelligent Adjustable Swirl Burner System and Control Method

Abstract

This invention provides an intelligent adjustable swirl burner system and its control method. It includes: a burner assembly comprising a central air duct, an adjustable primary air duct, an inner secondary air duct, an outer secondary air duct, and an expander cone; the adjustable primary air duct includes an inner primary air duct, a rotating tube, and an outer primary air duct, the rotating tube driving the outer primary air duct closer to or further away from the inner primary air duct, the outer primary air duct having a blunt body; an air supply assembly supplying air to the combustion stabilization chamber within the expander cone; a fuel supply assembly supplying fuel to the combustion stabilization chamber within the expander cone; a detection assembly including a combustion state detection unit, a flame shape detection unit, a flame temperature distribution detection unit, a flue gas temperature detection unit, and a combustion product detection unit; and a control unit for comprehensively analyzing parameters input from the detection assembly, generating control commands, and regulating the air supply assembly, the fuel supply assembly, and the adjustable primary air duct.

Description

Technical Field

[0001] This invention relates to the field of combustion equipment technology, and in particular to an intelligent adjustable swirl burner system and its control method. Background Technology

[0002] Rapid and deep peak shaving of boilers requires achieving rapid load changes and stable combustion at low loads while ensuring safe operation. The need for rapid and deep peak shaving in coal-fired power plants is urgent. To overcome the dilemma of renewable energy consumption and meet the needs of rapid and deep peak shaving in boilers, a multi-pronged approach is needed from the power supply side, the grid side, and the load side to improve the flexibility of the entire power system. Among these, the power supply side has the greatest potential for flexibility improvement and the strongest peak shaving capacity. Domestic and international scholars have conducted extensive research on improving power supply side flexibility based on fundamental combustion theories, mainly focusing on fuel performance improvement, furnace parameter adjustment, unit system optimization, and new burner design, among which new burners have shown the most significant effects. Therefore, the burner, as the core component of the boiler combustion system, plays a crucial role in current rapid and deep peak shaving in boilers.

[0003] Currently, based on fundamental combustion theories, domestic and international scholars have proposed numerous technical measures and modification schemes to improve boiler combustion stability under low loads. These mainly include increasing primary air supply temperature, increasing pulverizer outlet temperature, increasing pulverized coal fineness, increasing pulverized coal concentration, and reducing primary air rate to facilitate stable combustion of pulverized coal. However, the design of burners with real-time adjustable and variable structures has not been widely researched and applied. Intelligent adjustable swirl burners and their adjustment methods have significant advantages in flexible peak shaving for thermal power units, enabling efficient, safe, and stable combustion control to meet the grid's demand for flexible peak shaving. Intelligent adjustable swirl burners can adjust combustion parameters in real time according to demand to quickly regulate the load output of thermal power units, meeting grid requirements and improving flexibility and adjustability. By precisely controlling the ratio of fuel supply to air supply, combustion efficiency can be optimized while ensuring stable combustion, improving power generation efficiency, and reducing energy consumption and emissions. Therefore, it is necessary to design an intelligent adjustable swirl burner and its adjustment method to achieve the above objectives. Summary of the Invention

[0004] This invention provides an intelligent adjustable swirl burner system and its control method, which can reduce pollutant emissions.

[0005] On the one hand, an intelligent adjustable swirl burner system is provided, including:

[0006] A burner assembly includes a central duct, an adjustable primary air duct, an inner secondary air duct, an outer secondary air duct, and an expansion cone; the adjustable primary air duct is nested outside the central duct, the inner secondary air duct is nested outside the adjustable primary air duct, and the outer secondary air duct is nested outside the inner secondary air duct; the adjustable primary air duct includes an inner primary air duct, a rotating tube, and an outer primary air duct, the rotating tube being used to drive the outer primary air duct closer to or further away from the inner primary air duct, and a blunt body is provided on the outer primary air duct;

[0007] The air supply assembly provides air to the combustion stabilization chamber inside the expansion cone through a central air duct, an adjustable primary air duct, an inner secondary air duct, and an outer secondary air duct.

[0008] The feeding assembly provides fuel to the combustion stabilization chamber inside the expansion cone;

[0009] The detection components include a combustion state detection unit, a flame shape detection unit, a flame temperature distribution detection unit, a flue gas temperature detection unit, and a combustion product detection unit;

[0010] The control unit is used to perform comprehensive analysis based on the parameters input by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit, and combustion product detection unit, generate control commands, and regulate the air supply assembly, feeding assembly, and adjustable primary air duct.

[0011] Optionally, the air inlets of the central air duct, primary air duct, inner secondary air duct, and outer secondary air duct are located on the same side, and the air outlets of the central air duct, primary air duct, inner secondary air duct, and outer secondary air duct are located on the same side. The oil gun is inserted from the end near the air inlet of the central air duct and extends to the end near the air outlet of the central air duct.

[0012] Optionally, the central air duct is connected to the pulverized coal concentrator at the center of the burner, and the central air is directly drawn out from the large air box of the air supply assembly. An electric regulating door is installed on the central air duct to regulate the central air volume.

[0013] Optionally, the primary air-coal mixture first enters the air inlet of the adjustable primary air duct, and then passes through the adjustable primary air duct and the coal powder concentrator arranged in the adjustable primary air duct to achieve radial separation and ignition combustion of the coal powder airflow.

[0014] Optionally, internal and external secondary air are injected into the furnace at different stages of combustion through concentric internal and external secondary air ducts within the burner, achieving staged air supply and reducing NOx generation.

[0015] Optionally, the inner and outer secondary air ducts are equipped with electrically adjustable doors to regulate the inner and outer secondary air volumes.

[0016] Optionally, an axial vortex generator is provided inside the internal secondary air duct to cause the internal secondary air to rotate.

[0017] On the other hand, a control method for an intelligent adjustable swirl burner system is provided, wherein the control method for the intelligent adjustable swirl burner system is applied to the intelligent adjustable swirl burner system as described in any of the preceding claims, comprising:

[0018] The combustion parameter information detected by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit and combustion product detection unit is acquired. The combustion parameter information includes combustion state, flame shape, flame temperature distribution, flue gas temperature and combustion products.

[0019] The control unit analyzes the combustion parameter information and generates control commands;

[0020] The control unit controls the air supply assembly, the feeding assembly, and the adjustable primary air duct according to control commands.

[0021] Optionally, the control unit analyzes the parameter information and generates control commands, including:

[0022] A weighted formula is constructed to describe the relationship between combustion parameter information and adjustable parameters, including the air volume of the air supply component, the position of the bluff body, the position and size of the rich coal zone and the lean coal zone, the rotation direction and speed of the adjustable primary air duct, and the coal powder concentration.

[0023] Identify combustion parameters that do not meet the requirements from the combustion parameter information and designate them as combustion parameters to be adjusted.

[0024] Based on the influence of the adjustable parameters on the combustion parameters to be adjusted in the weighting formula, determine the adjustable parameters among the adjustable parameters;

[0025] The specific adjustment value of the parameter to be adjusted is determined based on the weighting formula, and then used as a control command.

[0026] Optionally, a weighting formula is constructed to describe the relationship between parameter information and adjustable parameters, including:

[0027] Determine the first-level weights, which are used to describe the influence of a single input combustion parameter on the output parameter to be adjusted;

[0028] The second-level weight is determined based on the first level. The second-level weight is used to determine the degree of influence of the parameter to be adjusted after the interaction between multiple input combustion parameter information.

[0029] A weighting formula is constructed based on the first-level and second-level weights to describe the relationship between combustion parameter information and adjustable parameters.

[0030] The beneficial effects of the technical solutions provided in this disclosure are:

[0031] This disclosure provides an intelligent adjustable swirl burner system. The system includes an adjustable primary air duct, comprising an inner primary air duct, a rotating tube, and an outer primary air duct, with a blunt body mounted on the outer primary air duct. The rotating tube enables spatial orientation adjustment of the adjustable primary air duct, while the spatial position of the blunt body influences the size and intensity of the vortex, adjusting the position and size of the rich and lean coal zones. This, in turn, more effectively controls the flame shape and temperature distribution, improving combustion efficiency and stability. The system employs a staged air supply system and utilizes a control unit to automatically adjust the airflow and duct structure of each duct, significantly improving the burner's coal adaptability, optimizing combustion stability under low load conditions, reducing NOx generation, and decreasing pollutant emissions. Furthermore, a closed-loop control system optimizes adjustments based on real-time feedback, ensuring the burner always operates at its optimal state, greatly improving combustion efficiency and stability. This represents a significant technological advancement and substantial socio-economic benefit for the burner industry. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of an intelligent adjustable swirl burner system provided in an embodiment of the present disclosure;

[0034] Figure 2 A flowchart illustrating a control method for an intelligent adjustable swirl burner system provided in this embodiment of the disclosure;

[0035] Figure 3 This is a schematic diagram of a control relationship provided in an embodiment of the present disclosure.

[0036] The attached figures are labeled as follows:

[0037] 1: Burner assembly; 11: Central duct; 111: First blunt body; 12: Adjustable primary air duct; 121: Inner primary air duct; 122: Rotary tube; 123: Outer primary air duct; 1231: Second blunt body; 13: Inner secondary air duct; 131: Axial vortex diffuser; 14: Outer secondary air duct; 15: Diverter cone; 16: Flame stabilizer;

[0038] 2: Air supply components;

[0039] 3: Feeding assembly;

[0040] 4: Detection components;

[0041] 5: Control unit. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] Figure 1 This is a schematic diagram of an intelligent adjustable swirl burner system provided as an embodiment of this disclosure. See also... Figure 1 ,include:

[0044] The burner assembly 1 includes a central air duct 11, an adjustable primary air duct 12, an inner secondary air duct 13, an outer secondary air duct 14, and an expansion cone 15. The adjustable primary air duct 12 is nested outside the central air duct 11, the inner secondary air duct 13 is nested outside the adjustable primary air duct 12, and the outer secondary air duct 14 is nested outside the inner secondary air duct 13. The adjustable primary air duct 12 includes an inner primary air duct 121, a rotating pipe 122, and an outer primary air duct 123. The rotating pipe 122 is used to drive the outer primary air duct 123 to move closer to or away from the inner primary air duct 121. A second blunt body 1231 is provided on the outer primary air duct 123.

[0045] The air supply assembly 2 supplies air to the combustion stabilization chamber 151 inside the expansion cone 15 through the central air duct 11, the adjustable primary air duct 12, the inner secondary air duct 13, and the outer secondary air duct 14.

[0046] Feeding assembly 3 provides fuel to the combustion chamber 151 inside the expanding cone 15;

[0047] The detection component 4 includes a combustion state detection unit, a flame shape detection unit, a flame temperature distribution detection unit, a flue gas temperature detection unit, and a combustion product detection unit.

[0048] The control unit 5 is used to perform comprehensive analysis based on the parameters input by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit and combustion product detection unit, generate control commands, and regulate the air supply assembly 2, the feeding assembly 3 and the adjustable primary air duct 12.

[0049] This disclosure provides an intelligent adjustable swirl burner system. The system includes an adjustable primary air duct, comprising an inner primary air duct, a rotating tube, and an outer primary air duct, with a blunt body mounted on the outer primary air duct. The rotating tube enables spatial orientation adjustment of the adjustable primary air duct, while the spatial position of the blunt body influences the size and intensity of the vortex, adjusting the position and size of the rich and lean coal zones. This, in turn, more effectively controls the flame shape and temperature distribution, improving combustion efficiency and stability. The system employs a staged air supply system and utilizes a control unit to automatically adjust the airflow and duct structure of each duct, significantly improving the burner's coal adaptability, optimizing combustion stability under low load conditions, reducing NOx generation, and decreasing pollutant emissions. Furthermore, a closed-loop control system optimizes adjustments based on real-time feedback, ensuring the burner always operates at its optimal state, greatly improving combustion efficiency and stability. This represents a significant technological advancement and substantial socio-economic benefit for the burner industry.

[0050] In this embodiment, the adjustable spatial orientation of the primary air duct is achieved through the cooperation of the rotating tube and the inner primary air duct. This design can change the ignition distance and time according to different combustion requirements, adjust the shape of the central recirculation zone, thereby improving the adaptability to different coal types and achieving stable combustion under low load conditions.

[0051] In this embodiment, the air inlets of the central air duct 11, adjustable primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14 are located on the same side, and the air outlets of the central air duct 11, adjustable primary air duct 12, inner secondary air duct 13, and outer secondary air duct 14 are located on the same side. The fuel gun enters from the end near the air inlet of the central air duct 11 and extends to the end near the air outlet of the central air duct 11. By setting the air inlets and outlets in the above manner, staged air supply during the combustion process is ensured.

[0052] In this embodiment, the central air duct is connected to the pulverized coal concentrator at the center of the burner. The central air is directly drawn from the large air box of the air supply assembly, and an electrically adjustable damper is installed on the central air duct to regulate the central air volume. By setting the electrically adjustable damper, the adjustability of the central air volume is ensured.

[0053] In this embodiment of the disclosure, the primary air-coal mixture first enters the air inlet of the adjustable primary air duct 12, and then passes through the adjustable primary air duct 12 and the coal powder concentrator arranged in the adjustable primary air duct 12 to achieve radial separation and ignition combustion of the coal powder airflow.

[0054] In this embodiment, the internal secondary air and the external secondary air are injected into the furnace at different stages of combustion through the concentric internal secondary air duct 13 and external secondary air duct 14 inside the burner, so as to achieve staged air supply and reduce the amount of NOx generated.

[0055] In this embodiment, the internal and external secondary air are injected into the furnace at different stages of combustion through concentric annular channels within the burner. This improvement helps to more effectively reduce NOx generation, decrease pollutant emissions, and simultaneously improve combustion efficiency.

[0056] In this embodiment, the inner secondary air duct 13 and the outer secondary air duct 14 are equipped with electrically adjustable dampers for regulating the inner and outer secondary air volumes. By providing electrically adjustable dampers, the adjustability of the inner and outer secondary air volumes is ensured.

[0057] In this embodiment, an axial vortex 131 is provided inside the inner secondary air duct 13 to rotate the inner secondary air. The rotation of the secondary air by the axial vortex generates negative pressure, causing the high-temperature flue gas to flow back and providing energy for the ignition of the pulverized coal gas flow.

[0058] In this embodiment of the invention, the burner further includes a flame stabilizing ring, which enhances the turbulence of the pulverized coal airflow and flue gas recirculation.

[0059] Figure 2 A control method for an intelligent adjustable swirl burner system is provided as an embodiment of this disclosure. See also: Figure 2 ,include:

[0060] S101. Obtain combustion parameter information detected by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit and combustion product detection unit. The combustion parameter information includes combustion state, flame shape, flame temperature distribution, flue gas temperature and combustion products.

[0061] S102. The control unit analyzes the combustion parameter information and generates control commands.

[0062] In one example, step S102 includes:

[0063] Step 1: Construct a weighted formula to describe the relationship between combustion parameter information and adjustable parameters. The adjustable parameters include the air volume of the air supply component, the position of the bluff body, the position and size of the rich coal zone and the lean coal zone, the rotation direction and speed of the adjustable primary air duct, and the coal powder concentration.

[0064] In one example, step 1 includes:

[0065] The first step is to determine the first-level weights, which are used to describe the influence of a single input combustion parameter on the output parameter to be adjusted.

[0066] In this embodiment of the disclosure, the input combustion state parameters include: combustion state parameters ( Flame shape and spatial position ( Flame temperature distribution ), flue gas temperature ( Combustion products ( ).

[0067] In this embodiment of the disclosure, This indicates the furnace temperature, expressed in Kelvin (K). A3 indicates the spatial location of the flame center in mm, and A4 indicates the flame temperature gradient in K / m. This indicates the flue gas temperature, expressed in Kelvin (K). Indicates the combustion products CO and NO X The concentration is expressed in mol / L.

[0068] The corresponding first-level weights are as follows: , , , , .

[0069] First-level weights are based on ~ The degree of influence on the output when these five inputs change individually. ~ They are independent of each other and are not considered. ~ The interaction between them.

[0070] The second step is to determine the second-level weights, which are used to determine the degree of influence of the parameters to be adjusted after the interaction between multiple input combustion parameter information.

[0071] In this embodiment of the disclosure, the second-level weight determination ~ When these five inputs change simultaneously, some of them will affect each other, causing the output to change. (For example, When a change occurs independently, the output control command is: , When a change occurs independently, the output control command is: ,like and They can influence each other, then and When both change, the output control command is not + At this point, a second-level weight description is needed. and (The relationship between them)

[0072] In this embodiment of the disclosure, It acts directly on the output and does not affect other inputs. Therefore, There is no second-level weight, or rather The second-level weights are equal to the first-level weights (i.e.) ),Will Place in the first parameter set middle, Represents the first parameter set The degree of impact on the output.

[0073] In this embodiment of the disclosure, and There is a second level of weight. ,

[0074] in, and It was obtained through experiments. , ,but .Will and Named the second parameter set ,but For the first parameter set The weights, that is, the combustion parameters that can influence each other, are merged into the parameter set. The second-level weights (that is, the weights of the parameter set) describe the influence of the interaction of combustion parameters on the output.

[0075] By designing a controllable combustion chamber experiment, data on flame center position and temperature gradient under different fuel flow rates, oxygen concentrations, and mixing velocities were collected. A model was then established using a multiple linear regression method to determine the weighting coefficients describing the relationship between combustion parameters and flame characteristics. and .

[0076] In this embodiment of the disclosure, and There is a second level of weight. ,in, and It was obtained through experiments. , ,but .Will and Named the third parameter set ,but For the third parameter set The weight.

[0077] A series of combustion experiments were designed to measure the flue gas temperature (A4) and the concentrations of combustion products CO and NOx (A5) under different operating conditions. A correlation model between these parameters and combustion efficiency was established using multiple linear regression analysis. The experimental data were fitted using the least squares method, and the weighting coefficients in the model were finally determined. and To quantify the impact of each parameter on the combustion results.

[0078] The third step is to construct a weighting formula based on the first-level and second-level weights to describe the relationship between combustion parameter information and adjustable parameters.

[0079] In this embodiment of the disclosure, the weighting formula is:

[0080] , The range of values ​​is , The range of values ​​is .

[0081] in, It is the first One output signal, It indicates the air volume (that is, the air volume of primary air and secondary air). Size by , , , Decide. Indicates the spatial position of a blunt body. Size by and Decide. The location and size of the rich and poor areas for fans. Size by , , Decide. This indicates the direction and speed of rotation of the primary air duct. Size by and Decide, Indicates the concentration of pulverized coal. Size by , , Decide.

[0082] It is the first The control logic function corresponding to each output signal. It is the set of all input signals. . It is the first A set of input signals Weighting factors. It is the first A set of input signals The corresponding sub-model function. Corresponding to different output signals ( to The sub-model functions are respectively , , , , . This represents the summation of the product of the weights and sub-model functions over all sets of input signals.

[0083] In order to determine the sub-model function corresponding to different output signals ( , , , , First, a large amount of experimental data was collected, including all input signals and their corresponding output signals. Next, based on the characteristics of the problem and the distribution of the data, a suitable mathematical model was selected, and the model parameters were estimated using regression analysis or machine learning algorithms. During model training, feature engineering techniques were used to optimize the input signals, and methods such as cross-validation were employed to ensure the model's generalization ability. Optimization algorithms such as least squares and gradient descent were used to determine the specific form of each sub-model function and its weight factor W. In the model validation phase, independent test datasets were used to evaluate the model's accuracy, and the model was adjusted and optimized based on the validation results, ultimately obtaining sub-model functions that accurately describe the relationship between the input and output signals.

[0084] In this embodiment of the disclosure, the interaction between multiple combustion parameter information and multiple adjustable parameters can be described in detail through the first-level weight and the second-level weight, thereby realizing many-to-many control.

[0085] In this embodiment of the disclosure, for The control method is as follows:

[0086] .

[0087] Determine the sub-model function This can achieve the effect of input signal right The control, and the sub-function model It can be constructed based on experiments.

[0088] For example, the shape and spatial position of the flame Regarding air volume The greatest impact (weight 0.5) comes from combustion products, followed by other factors. (Weighted at 0.3), and finally the combustion state parameters. (Weighted at 0.2). When If changes occur beyond the expected range (irregular flame shape, flame center shift), first increasing the primary and secondary airflow can help. Within the rapid return range. Increase airflow: ,in, It increases the airflow. , Change It is aimed at Sub-model functions.

[0089] Monitoring the adjustment effect: After adjusting the airflow, monitor whether the flame shape and spatial position return to the predetermined range. Record the adjusted airflow ( ) and other input signals ( to ).

[0090] Data Analysis: Analysis before and after the adjustment The changes in Z1 and its impact on A2 were investigated. The adjusted primary and secondary air volumes (Z1) were found to effectively improve the flame shape and spatial position, validating the effectiveness of the control logic.

[0091] In this embodiment of the disclosure, for The control method is as follows:

[0092] = .

[0093] In this embodiment of the disclosure, for The control method is as follows:

[0094] .

[0095] In this embodiment of the disclosure, for The control method is as follows:

[0096] .

[0097] In this embodiment of the disclosure, for The control method is as follows:

[0098] .

[0099] Figure 3 This is a schematic diagram of a control relationship provided in an embodiment of the present disclosure. Figure 3 The input signal is shown in the figure. With output signal The relationship of action.

[0100] Step 2: Identify the combustion parameters in the combustion parameter information that do not meet the requirements, and designate them as the combustion parameters to be adjusted.

[0101] Step 3: Determine the adjustable parameters among the adjustable parameters based on the influence of the adjustable parameters on the combustion parameters to be adjusted in the weighting formula.

[0102] Based on the control formula in step 2, determine to The specific data for regulation serves as control instructions.

[0103] S103. The control unit controls the air supply assembly, the feeding assembly, and the adjustable primary air duct according to the control instructions.

[0104] In this embodiment of the disclosure, a control method for an intelligent adjustable swirl burner system is provided, which can realize the automatic control of the intelligent adjustable swirl burner system, ensure that the intelligent adjustable swirl burner system maintains a better combustion state, and help reduce pollutant emissions.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent adjustable swirl burner system, characterized in that, include: A burner assembly includes a central duct, an adjustable primary air duct, an inner secondary air duct, an outer secondary air duct, and an expansion cone; the adjustable primary air duct is nested outside the central duct, the inner secondary air duct is nested outside the adjustable primary air duct, and the outer secondary air duct is nested outside the inner secondary air duct; the adjustable primary air duct includes an inner primary air duct, a rotating tube, and an outer primary air duct, the rotating tube being used to drive the outer primary air duct closer to or further away from the inner primary air duct, and a blunt body is provided on the outer primary air duct; The air supply assembly provides air to the combustion stabilization chamber inside the expansion cone through a central air duct, an adjustable primary air duct, an inner secondary air duct, and an outer secondary air duct. The feeding assembly provides fuel to the combustion stabilization chamber inside the expansion cone; The detection components include a combustion state detection unit, a flame shape detection unit, a flame temperature distribution detection unit, a flue gas temperature detection unit, and a combustion product detection unit; The control unit is used to perform comprehensive analysis based on the parameters input by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit, and combustion product detection unit, generate control commands, and regulate the air supply assembly, feeding assembly, and adjustable primary air duct.

2. The intelligent adjustable swirl burner system according to claim 1, characterized in that, The air inlets of the central air duct, primary air duct, inner secondary air duct, and outer secondary air duct are located on the same side, and the air outlets of the central air duct, primary air duct, inner secondary air duct, and outer secondary air duct are located on the same side. The oil gun is inserted from the end near the air inlet of the central air duct and extends to the end near the air outlet of the central air duct.

3. The intelligent adjustable swirl burner system according to claim 1, characterized in that, The central air duct is connected to the pulverized coal concentrator at the center of the burner. The central air is directly drawn out from the large air box of the air supply assembly, and an electric regulating door is installed on the central air duct to adjust the central air volume.

4. The intelligent adjustable swirl burner system according to claim 1, characterized in that, The primary air-coal mixture first enters the air inlet of the adjustable primary air duct, and then passes through the adjustable primary air duct and the coal powder concentrator arranged inside the adjustable primary air duct to achieve radial separation and ignition combustion of the coal powder airflow.

5. The intelligent adjustable swirl burner system according to claim 1, characterized in that, Internal and external secondary air are injected into the furnace at different stages of combustion through concentric internal and external secondary air ducts inside the burner, achieving staged air supply and reducing NOx generation.

6. The intelligent adjustable swirl burner system according to claim 1, characterized in that, The inner and outer secondary air ducts are equipped with electric regulating doors to control the inner and outer secondary air volumes.

7. The intelligent adjustable swirl burner system according to claim 1, characterized in that, An axial vortex is installed inside the internal secondary air duct to cause the internal secondary air to rotate.

8. A control method for an intelligent adjustable swirl burner system, characterized in that, The control method for the intelligent adjustable swirl burner system is applied to the intelligent adjustable swirl burner system as described in any one of claims 1 to 7, comprising: The combustion parameter information detected by the combustion state detection unit, flame shape detection unit, flame temperature distribution detection unit, flue gas temperature detection unit and combustion product detection unit is acquired. The combustion parameter information includes combustion state, flame shape, flame temperature distribution, flue gas temperature and combustion products. The control unit analyzes the combustion parameter information and generates control commands; The control unit controls the air supply assembly, the feeding assembly, and the adjustable primary air duct according to control commands.

9. The control method for the intelligent adjustable swirl burner system according to claim 8, characterized in that, The control unit analyzes the parameter information and generates control commands, including: A weighted formula is constructed to describe the relationship between combustion parameter information and adjustable parameters, including the air volume of the air supply component, the position of the bluff body, the position and size of the rich coal zone and the lean coal zone, the rotation direction and speed of the adjustable primary air duct, and the coal powder concentration. Identify combustion parameters that do not meet the requirements from the combustion parameter information and designate them as combustion parameters to be adjusted. Based on the influence of the adjustable parameters on the combustion parameters to be adjusted in the weighting formula, determine the adjustable parameters among the adjustable parameters; The specific adjustment value of the parameter to be adjusted is determined based on the weighting formula, and then used as a control command.

10. The control method for the intelligent adjustable swirl burner system according to claim 9, characterized in that, A weighting formula is constructed to describe the relationship between parameter information and adjustable parameters, including: Determine the first-level weights, which are used to describe the influence of a single input combustion parameter on the output parameter to be adjusted; The second-level weight is determined based on the first level. The second-level weight is used to determine the degree of influence of the parameter to be adjusted after the interaction between multiple input combustion parameter information. A weighting formula is constructed based on the first-level and second-level weights to describe the relationship between combustion parameter information and adjustable parameters.

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