Device for monitoring and controlling the high-temperature corrosion of water-cooled walls of a wall-like cut-circle boiler

Abstract

Device for monitoring and controlling the high-temperature corrosion of water-cooled walls of a wall-like cut-circle boiler, characterized in that it comprises the following: a creation module for a meshed model, which serves to obtain a structure of the water-cooled wall of the wall-like circular boiler and to create a meshed model based on the structure of the water-cooled wall of the wall-like circular boiler; a creation module for a correlation model, which serves to obtain real-time parameters of the water-cooled wall of the wall-like circular vessel and to create a correlation model corresponding to the real-time parameters in combination with the networked model; a creation module for a three-dimensional model, which serves to simulate with the CFD data and the corresponding model in order to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; a detection module for opening angles, which serves to obtain the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the flap openings at different air volumes within the CO field on the basis of the three-dimensional models of the temperature field and the CO field of the combustion chamber; an adjustment module for deflection angles, which serves to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and the real-time air volume at the appearance of the flame wall brushing in the boiler; an adjustment module for damper openings, which serves to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and the real-time air volume in the boiler.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of monitoring high-temperature corrosion of water-cooled walls, in particular to a device for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional boiler. STATE OF THE ART

[0002] The flame filling in the boiler is good, the flame temperature is high, but the diameter of the hypothetical tangent circle of the flame in the boiler is larger, which affects the heat distribution in the boiler and the tail between the heat surfaces, resulting in the heat distribution in the water-cooled wall and the tail between the heat surfaces being uneven, and ultimately affecting the boiler outlet temperature, which in turn affects the efficiency of the boiler; At the same time, the large diameter of the tangent circle of flame combustion causes the flame combustion to occur close to the wall surface, which triggers excessive coking, high-temperature corrosion and overtemperature of the water-cooled wall in the local heat load area, and other impacts on the safe and stable operation of the equipment.

[0003] Patent document CN105605563A, which relates to an apparatus and method for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional-circle boiler, discloses that a multi-layer primary air burner is arranged up and down the four water-cooled walls of the boiler. A secondary air outlet provided with the burner is provided with two nozzles, one for the fixed nozzle and the other for the deflectable nozzle driven by the drive device. At the same time, a flue gas measurement and sampling point is provided on the water-cooled wall.A control device receives the test result signal at the sampling point and controls the drive device of the deflectable air nozzle and the opening angle of the flapper to form an air shield layer in the downstream area of ​​the water-cooled wall, preventing the pulverized coal flow from directly flowing toward the water-cooled wall and destroying the reducing atmosphere required by the water-cooled wall to generate high-temperature corrosion. The above patent has the following disadvantages: 1. The control device and method can only detect the atmosphere composition at some points near the wall and cannot monitor the CO distribution of the entire flow field in the boiler in real time, so the deflection angle of the movable secondary air nozzle provided by the automatic control center is not accurate enough;2. The adjustment of the movable secondary air nozzle and the fixed secondary air nozzle in the boiler is difficult, so as to prevent the diameter of the hypothetical tangent circle of the flame in the wall-type sectional circle boiler from being too large, resulting in the flame wall brushing being directly affected by high-temperature corrosion. 3. Because the movable and fixed secondary air nozzles are installed in the same location in the boiler, the cost is high, and the movable secondary air nozzles and the fixed secondary air nozzles interfere with each other, causing the nozzle to be displaced or even fall off.

[0004] Patent CN113464917A presents a system for monitoring and adjusting the atmosphere in the water-cooled walls of a wall-type, sectional-circuit boiler. The patent document arranges measurement and sampling points in the four water-cooled walls of the boiler. The atmospheric composition of the wall surface is determined using a sampling device, and the reducing atmosphere of the wall surface is controlled using a number of near-wall air nozzle tubes, a number of air volume control valves, a number of three-way valves, a near-wall air main tube, and a variable-frequency fan arranged near the height of the water-cooled wall burner. The above patent has the following disadvantages: 1.The control device and method can only detect the atmospheric composition at some points near the wall, and cannot monitor the CO distribution of the entire flow field in the boiler in real time, so the air flow control by the variable-frequency fan is not accurate enough; 2. Because the air volume is only controlled by the variable-frequency fan, it is difficult to prevent the diameter of the hypothetical tangent circle of the flame in the wall-type sectional circle boiler from being large, resulting in the flame brush wall being directly affected by high-temperature corrosion. CONTENT OF THE PRESENT INVENTION

[0005] The purpose of the present invention is to overcome the above problem of high-temperature corrosion in the combustion chamber caused by the slight wall brushing of large cut-circle flames and to provide an apparatus and method for monitoring and controlling the high-temperature corrosion of water-cooled walls of a wall-type cut-circle boiler.

[0006] To achieve the above purpose, the present invention uses the following technical solutions: In a first aspect, the present invention provides a method for monitoring and Control of high-temperature corrosion of water-cooled walls of a wall-type sectional boiler, comprising the following steps: Detecting a structure of the water-cooled wall of the wall-like circular boiler, and Creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler; Obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and constructing a relevant model corresponding to the real-time parameters in combination with the networked model; Simulate with the corresponding model through CFD data and obtain the three-dimensional model of the temperature field and the CO field of the combustion chamber; Obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and of the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; Obtaining the optimal deflection angles of the primary air nozzles and secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume when the flame brush wall appears in the boiler; Obtain the real-time air volume and optimal damper opening of the current CO field based on the CO concentration and real-time air volume in the boiler. A further improvement of the present invention is that a specific method for detecting a structure of the water-cooled wall of the wall-type sectional circular boiler and for creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler is as follows: Maintaining the structure of the water-cooled wall of the wall-like circular boiler and Dividing into a number of areas according to the structure of the water-cooled wall of the wall-type sectional circular boiler; Performing the networked subdivision of a number of subdivided regions and forming a networked primary model; Establish boundary conditions and real-time monitoring data for the networked primary model based on the physical distribution conditions of the water-cooled wall of the wall-type sectional boiler; Adjusting the mesh density of the meshed primary model according to the structural properties in the various regions, and finally forming the meshed model. A further improvement of the present invention is that a specific method for obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and creating a relevant model corresponding to the real-time parameters in combination with the meshed model is as follows: Acquiring the real-time parameters of the water-cooled wall of the wall-type cross-sectional boiler, pre-processing the real-time parameters, and obtaining real-time operating parameter data that meets requirements; Correlating the different areas of the water-cooled wall of the boiler with the corresponding parameter data using the real-time operating parameter data and the networked model and establishing a preliminary correlation model; Comparing the historical data and the real-time parameters, optimizing and correcting the preliminary correlation model based on the comparison results, and generating a final correlation model.

[0007] A further improvement of the present invention is that a specific method for simulating with the corresponding model by CFD data and obtaining the three-dimensional model of the temperature field and the CO field of the combustion chamber is as follows: Specify the boundary conditions and initial conditions for the CFD simulation according to the structure and corresponding model of the water-cooled wall of the wall-type sectional circular boiler; Creating the model for the three-dimensional temperature field and the CO concentration field in the combustion chamber according to the boundary conditions and initial conditions for the CFD simulation and performing the CFD simulation; Obtaining a preliminary three-dimensional model of the temperature field and CO field in the furnace chamber based on the CFD simulation results; Correct and optimize the preliminary three-dimensional model of the temperature field and CO field in the combustion chamber according to the real-time monitoring data and obtain the final three-dimensional model of the temperature field and CO field in the combustion chamber.

[0008] A further improvement of the present invention is that the specific method for obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber is as follows: Analyzing the temperature distribution and CO concentration using the three-dimensional model of the temperature field and CO field in the combustion chamber and obtaining the area where the flame is in contact with the water-cooled wall and the area with high CO concentration due to incomplete combustion; Establish the correlation model between the deflection angle of the nozzle and the damper opening and the temperature and CO concentration corresponding to the area where the flame comes into contact with the water-cooled wall and the area with high CO concentration due to incomplete combustion.

[0009] A further improvement of the present invention is that the specific method for obtaining the optimal deflection angles of the primary air nozzles and secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume when the flame brush wall appears in the boiler is as follows: Collecting information about the surface temperature of the water-cooled wall in the combustion chamber in real time and recording the information of the real-time air volume of the boiler, pre-processing the temperature information and the air volume information, and eliminating abnormal values; Simulating the influence of different deflection angles of the primary and secondary air nozzles on the flame position using a three-dimensional model of the temperature field in the combustion chamber and obtaining a series of effective sets of the deflection angle under the current air volume conditions; Performing a series of effective sets of deflection angle and monitoring the boiler changes in real time and, if the desired effect is not achieved, continuing to adjust the deflection angles until the desired effect is achieved and maintaining the optimal deflection angles of the primary and secondary air nozzles for the current temperature field in the combustion chamber.

[0010] A further improvement of the present invention is that the specific method for obtaining the real-time air volume and the optimal damper opening of the current CO field based on the CO concentration and the real-time air volume in the boiler is as follows: Obtaining the information on the CO concentration and the real-time air volume in the combustion chamber, pre-processing the information on the CO concentration and the real-time air volume and eliminating abnormal values; Simulating the influence of different flap openings on the CO concentration in the combustion clamp using a CFD model and obtaining a CO distribution relationship for different combinations of flap openings, and obtaining the combination of flap openings with the lowest CO concentration based on the CO distribution relationship for different combinations of flap openings; Perform the combination of damper opening with the lowest CO concentration and monitor the boiler changes in real time, and if the desired effect is not achieved, continue to adjust the damper opening until the desired effect is achieved and obtain the optimal damper opening for the current CO field.

[0011] In a second aspect, the present invention provides an apparatus for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional boiler, comprising: a meshed model creation module for obtaining a structure of the water-cooled wall of the wall-type sectional circular boiler and creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler; a correlation model creation module for obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and creating a correlation model corresponding to the real-time parameters in combination with the networked model; a three-dimensional model creation module used to simulate with the CFD data and the corresponding model to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; an opening angle acquisition module for obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; a deflection angle adjustment module designed to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume at the appearance of the flame wall brush in the boiler; a damper opening adjustment module designed to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and real-time air volume in the boiler.

[0012] In a third aspect, the present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor executes the computer program to implement the steps of a method for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional-circuit boiler.

[0013] In a fourth aspect, the present invention provides a storage medium having stored thereon a computer program, the computer program, when executed by the processor, implementing the steps of a method for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional-circuit boiler.

[0014] Compared to the prior art, the present invention has the following advantageous effects: The present invention controls the position and distribution of the flame in the combustion chamber by precisely adjusting the deflection angle of the primary and secondary air nozzles, preventing the flame from directly brushing the wall and thus reducing the accumulation of high-temperature areas on the water-cooled wall. This reduces the risk of high-temperature corrosion and extends the service life of the boiler's water-cooled wall. By optimizing the damper opening, the present invention promotes complete mixing of fuel and air, reduces the phenomenon of incomplete combustion, lowers CO concentration, and improves combustion efficiency. This not only improves the boiler's combustion conditions but also reduces the emission of harmful gases and helps reduce chemical corrosion on the water-cooled wall.The present invention is capable of monitoring data in real time and can dynamically adjust the air nozzle angle and damper opening to adapt to the boiler's operating status under different operating conditions. Even with load changes or fuel fluctuations, the adjustment can be automatically optimized to ensure that the temperature and CO concentration in the combustion chamber are maintained within a reasonable range. The adaptive control method improves the stability of the boiler system and reduces maintenance costs by effectively preventing high-temperature corrosion. The method reduces equipment wear and failure rates, extends the service life of the water-cooled wall, and reduces the frequency of maintenance and downtime, significantly reducing operation and maintenance costs. SHORT DESCRIPTION OF THE DRAWING Fig. 1 shows a flowchart of the present invention; Fig. 2 shows a system diagram of the present invention; Fig. 3 shows a system diagram of Embodiment 9. DETAILED DESCRIPTION

[0015] For a better understanding of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are intended to illustrate the present invention only and are not intended to limit it. Embodiment 1

[0016] In Fig. 1 shows a method for monitoring and controlling high-temperature corrosion of the water-cooled wall of a wall-type cross-sectional boiler, comprising the following steps: S1: Acquiring a structure of the water-cooled wall of the wall-type sectional circular boiler, and creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler; S2: Obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and establishing a relevant model corresponding to the real-time parameters in combination with the networked model; S3: Simulate with the corresponding model through CFD data and obtain the three-dimensional model of the temperature field and CO field of the combustion chamber; S4: Obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and of the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; S5: Obtaining the optimal deflection angles of the primary air nozzles and secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume when the flame brush wall appears in the boiler; S6: Obtain the real-time air volume and optimal damper opening of the current CO field based on the CO concentration and real-time air volume in the boiler. Embodiment 2

[0017] In Fig. 2 shows an apparatus for monitoring and controlling high-temperature corrosion of the water-cooled wall of a wall-type sectional boiler, comprising: a networked model creation module for obtaining a structure of the water-cooled wall of the wall-type sectional boiler and creating a networked model based on the structure of the water-cooled wall of the wall-type sectional boiler; a correlation model creation module for obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and creating a correlation model corresponding to the real-time parameters in combination with the networked model; a three-dimensional model creation module used to simulate with the CFD data and the corresponding model to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; an opening angle acquisition module for obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; a deflection angle adjustment module designed to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume at the appearance of the flame wall brush in the boiler; a damper opening adjustment module designed to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and real-time air volume in the boiler. Embodiment 3

[0018] The specific method for capturing the structure of the water-cooled wall of a wall-type sectional boiler and constructing a meshed model based on the structure of the water-cooled wall of the wall-type sectional boiler is as follows: Obtain detailed information about the structure of the water-cooled wall of the wall-type sectional boiler. This includes the size, thickness, shape, material of the water-cooled wall, and its installation position in the boiler. At the same time, different areas of the water-cooled wall are subdivided according to the actual structure of the boiler, such as high-temperature areas, low-temperature areas, corners, and other critical locations, to enable more refined modeling.The process of domain subdivision not only helps with subsequent data acquisition but also ensures that the model has higher resolution and adaptability, thus laying the foundation for subsequent networked subdivision.

[0019] After the region subdivision is completed, mesh subdivision is performed to create a basic meshed model of the water-cooled wall. Mesh subdivision is usually performed using the finite element or finite volume method, and the mesh density is adjusted according to the complexity and structural characteristics of different regions. For example, for high-temperature regions or corners with complex shapes, finer meshes can be used to ensure the accuracy of calculations in these regions. During this process, the data on the material properties, heat transfer characteristics, and corrosion tendency of the water-cooled wall must be combined into a basic mesh node. This meshed model forms the framework for subsequent parameter import and simulation of the 3D field.

[0020] Based on the basic networked model, boundary conditions and real-time monitoring data from actual operation are introduced, such as the temperature distribution, air flow fluctuations, and pressure distribution in the boiler. This data is used to calibrate and optimize the networked model to ensure it better matches actual operating conditions. This step also includes setting boundary conditions, such as heat transfer coefficients on the inside and outside of the water-cooled walls, flow conditions, etc., to improve the dynamic response of the model. By introducing real-time monitoring data, the networked model not only becomes a static structural simulation but also reflects the actual dynamic thermal corrosion environment, providing a reliable basis for subsequent simulation and optimization. Embodiment 4

[0021] The specific procedure for obtaining real-time parameters of the water-cooled wall of the wall-type sectional boiler and building a relevant model corresponding to the real-time parameters in combination with the networked model is as follows: Collect the real-time operating parameters of the water-cooled wall of the wall-type sectional boiler, including temperature, pressure, flow rate, CO concentration, and other information. To ensure the accuracy and stability of the data, the collected raw data must be preprocessed. This includes operations such as noise filtering, missing value completion, and anomalous data elimination. The focus of this step is to ensure that all input data are credible and representative and can be used for subsequent analyses.For example, real-time temperature fluctuation data can be smoothed using the moving average method, resulting in more stable parameter inputs that provide a reliable data basis for subsequent modeling.

[0022] Correlating the various areas of the boiler's water-cooled wall with the corresponding parameter data and creating a preliminary correlation model based on the preprocessed data and the previously created networked model. This requires entering the actual values ​​of parameters such as temperature, pressure, air volume, etc. at each network node of the networked model to ensure that the model accurately represents the specific operating conditions of the water-cooled wall in each area. To achieve model accuracy, statistical methods (e.g., multiple linear regression or neural networks) can be used to fit and calibrate the relationships between the parameters, resulting in a preliminary model framework based on real-time data.

[0023] Optimization and calibration of the model based on the preliminary model is performed by dynamically comparing historical data with real-time data. Machine learning algorithms (e.g., support vector machines or random forests) can be used to identify potential patterns and trends in the data and iteratively optimize the model. By implementing a data-driven approach, relevant models can more accurately predict areas at risk for high-temperature corrosion. For example, the risk of increased corrosion can be analyzed by training the model to predict changes in CO concentration over the next few hours. The optimized correlation model not only reflects current operating conditions but also has predictive capabilities, providing a reliable basis for real-time control. Embodiment 5

[0024] The specific procedure for simulating with the corresponding model through CFD data and obtaining the three-dimensional model of the temperature field and CO field of the combustion chamber is as follows: Specify the boundary conditions and initial conditions for the CFD simulation based on the structure of the boiler's water-cooled wall and the previously created meshed model. These conditions include the temperature distribution, air flow rate, fuel type, combustion rate, etc. inside and outside the combustion chamber. When specifying the boundary conditions, special attention must be paid to the temperature and flow field in critical areas, e.g., at the flame wall brush location, near the nozzle, and in other high-temperature corrosion-prone areas. The accuracy of the initial conditions directly affects the stability and convergence of the simulation. Therefore, they should be compared with historical data and On-site measurement data is combined to ensure the appropriateness of the input conditions. This step forms the basis for the subsequent 3D simulation, which provides the required initial environment for the CFD calculation.

[0025] After the boundary conditions and initial conditions are defined, a preliminary 3D model of the temperature field and the CO field in the combustion chamber is created, and the CFD solution is initiated. Using numerical methods (e.g., finite volume methods), iterative calculations of the temperature and CO concentration are performed for each mesh unit in the boiler to gradually simulate the heat flow and chemical reaction processes in the combustion chamber. The temperature field simulation focuses on the temperature distribution in the flame region, particularly in the heat-affected zone near the boiler wall, while the CO field simulation focuses on the CO concentration distribution in the combustion region and at the combustion chamber outlet.This step requires greater computational resources but allows to obtain detailed heat flow and chemical reaction properties in the combustion chamber to form complete three-dimensional temperature and CO fields.

[0026] After a preliminary 3D model of the temperature and CO fields in the combustion chamber has been created, the model is calibrated and optimized using real-time monitoring data. The accuracy of the simulation is assessed by comparing the simulation results with the actual monitored temperature, CO concentration, and other data, and the model is adjusted accordingly. If necessary, the model can be further optimized by increasing the mesh density and adjusting the boundary conditions to ensure that it better matches the actual operating conditions of the boiler. Ultimately, the optimized control data, such asThe deflection angles of the primary and secondary air nozzles and the damper opening under different air volume conditions were extracted from the calibrated model to obtain an accurate reference for subsequent monitoring of high-temperature corrosion and control of the boiler air flow rate. Embodiment 6

[0027] The specific method for obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber is as follows: After establishing a three-dimensional model of the temperature field and CO concentration field in the combustion chamber, the temperature distribution and CO concentration were first analyzed in detail to identify critical areas and high-temperature corrosion-prone areas. Through temperature field analysis, the areas where the flame contacts or is close to the water-cooled wall—that is, the locations where the flame brushes the wall—were identified and marked as high-temperature corrosion-prone areas. Then, based on the concentration distribution of the CO field, areas with high CO concentration due to incomplete combustion were identified, where CO accumulation may exacerbate corrosion of the water-cooled wall.By identifying the overlapping areas of high temperature and high CO concentration, it is clarified which boiler areas need to be focused on adjusting the air nozzle angle and damper opening. This step lays the foundation for subsequent parameter adjustments and ensures that optimizations and adjustments are targeted.

[0028] After identifying the critical areas to be optimized, the correlation model between the nozzle angle and damper opening, as well as the temperature and CO concentration, is created based on the 3D model. Through multiple simulations, the effects of different combinations of deflection angles of the primary and secondary air nozzles and damper openings on the temperature and CO fields are analyzed. For example, increasing the deflection angle of the primary air nozzle can deflect the flame away from the water-cooled wall and reduce the effect of flame wall brushing; increasing the secondary air volume can reduce the local CO concentration and thus the risk of corrosion.Based on these simulation results, a correlation model is created, which allows for a preliminary optimization solution for the nozzle deflection angle and flap opening for a specific air volume and temperature. This step ensures that the parameter adjustments are functional and provides a basis for subsequent real-time control.

[0029] Based on the constructed correlation model, the nozzle deflection angle and damper opening are dynamically adjusted according to real-time data on the boiler's temperature, CO concentration, and air volume. The real-time monitoring system continuously tracks changes in temperature and CO concentration, verifies the control effect, and provides feedback to the correlation model. When the system detects areas of high temperature or high CO concentration, the model specifies the optimal combination of air nozzle deflection angle and damper opening and adjusts these parameters in real time. After a validation and feedback phase, the correlation model is continuously optimized and calibrated, allowing the model to be better adapted to the actual operating conditions of the boiler.This dynamic optimization allows the boiler's air volume and air direction to be adjusted more precisely, ultimately resulting in a reduction in high-temperature corrosion and energy savings. Embodiment 7

[0030] The specific method for obtaining the optimal deflection angles of the primary air nozzles and secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume when the flame brush wall appears in the boiler is as follows: The surface temperatures of the water-cooled walls in the combustion chamber are recorded in real time by temperature sensors, with particular attention being paid to the temperature conditions in the flame wall brushing area. At the same time, information about the boiler's air volume is recorded in real time, including the velocity and quantity of primary and secondary air. This real-time data helps identify areas of high temperatures where the flame touches or passes close to the water-cooled wall, which usually manifests as higher than normal operating temperatures. The data is first processed to filter out noise and outliers to ensure accuracy and, based on this, to determine whether the flame wall brushing has reached a temperature threshold that could cause high-temperature corrosion.This step provides a clear target area for the next step of air nozzle adjustment by identifying the high temperature area with flame wall brushing.

[0031] After identifying the flame wall brushing area, the 3D temperature field model was used to simulate the effects of different deflection angles of the primary and secondary air nozzles on the flame position. During the simulation process, the deflection angles of the primary and secondary air nozzles are gradually increased or decreased to observe the flame deflection in the combustion chamber, with particular attention to the effects of flame movement in the high-temperature region. For example, by gradually increasing the deflection angle of the primary air nozzle, an attempt is made to push the flame away from the water-cooled wall and thus reduce the temperature in the flame wall brushing area. The deflection angle of the secondary air nozzle can further assist flame orientation and optimize flame flow.The effect of each combination of deflection angles on the temperature field is recorded, and the combination of deflection angles that results in the greatest temperature drop and the least wall brushing is selected as the candidate for the optimization solution. In this step, several simulations were performed to determine effective combinations of deflection angles for reducing flame wall brushing under the current air volume conditions.

[0032] The selected deflection angle combinations are applied to actual boiler operation, and the temperature change in the flame wall brushing area is tracked by a real-time monitoring system. When the temperature drops and the flame leaves the water-cooled wall, the current deflection angle is effective; if the desired effect is not achieved, the angle is further adjusted to validate other candidates. During this process, the model will fine-tune the combination of nozzle angles based on real-time feedback on temperature and airflow to better match actual operating conditions. At the same time, when the flame is stable and the flame no longer brushes the wall, the current deflection angle is set as the new optimal deflection angle.When the air volume or boiler load changes, the model dynamically calculates the nozzle angle and adjusts it to the new operating conditions to ensure that the risk of high-temperature corrosion is effectively controlled. Embodiment 8

[0033] The specific procedure for obtaining the real-time air volume and optimal damper opening of the current CO field based on the CO concentration and real-time air volume in the boiler is as follows: The CO concentration distribution in the combustion chamber is recorded in real time using CO sensors installed in various areas of the boiler, with particular emphasis on the CO concentration in the combustion zone and in the flue gas flow area. High CO concentrations usually indicate incomplete combustion, which can lead to increased local corrosion. At the same time, real-time air volume data for both the primary and secondary air in the boiler are recorded to understand the relationship between air volume and CO concentration under the current combustion conditions. To ensure data accuracy, the CO concentration data must be filtered for noise and outliers processed to obtain a clear CO distribution.The data is analyzed to identify areas of high CO concentration and to clarify the most important target areas for adjusting the damper opening. This step provides the current CO distribution in the combustion chamber and forms the basis for subsequent adjustment of the damper opening.

[0034] After analyzing the CO concentration distribution, the effects of different damper openings on the CO concentration field in the combustion chamber are simulated using a CFD (Computational Fluid Dynamics) model. During the simulation, the primary and secondary air damper openings were gradually increased or decreased to observe the changes in CO concentration, with particular emphasis on improvements in the high-concentration region. For example, increasing the primary air damper opening can reduce the local CO concentration by more thoroughly mixing the fuel with the air, while adjusting the secondary air damper opening can contribute to improving the CO concentration in the flue gas after combustion.The CO distribution for each damper opening combination is recorded to determine the damper opening combination that minimizes CO concentration, resulting in several optimization scenarios. In this step, simulation is used to determine the effective damper opening combinations that improve CO distribution under the current air volume conditions. The selected damper opening combinations are applied to actual boiler operation, and the effectiveness of the current damper opening combinations is verified by real-time monitoring of CO concentration changes. If the CO concentration is significantly reduced and the expected target is reached, the current opening combination is effective; if the expected effect is not achieved, other proposed solutions are gradually tried and the damper opening is adjusted.The model further optimizes the damper opening settings based on feedback from real-time monitoring data, better reflecting actual operating conditions. As the boiler load or combustion conditions change, the system can dynamically calculate and adjust the damper opening to ensure the CO concentration always remains within an appropriate range, reducing the risk of corrosion and achieving a stable, low-corrosion combustion environment. Embodiment 9

[0035] As in the Fig.3, the present invention also provides an electronic device 100 for a method for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type sectional-circle boiler, wherein the electronic device 100 comprises a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104.

[0036] The memory 101 can be used to store the computer program 103, and the processor 102 carries out the steps of a method for monitoring and controlling high-temperature corrosion of the water-cooled wall of a wall-type sectional-circle boiler, as described in Embodiment 1, by executing the computer program stored in the memory 101 and retrieving the data stored in the memory 101. The memory 101 can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, an application program required for at least one function (e.g., a sound reproduction function, an image reproduction function, etc.), and the like; the storage data area can store data (e.g., audio data), etc., generated during the use of the electronic device 100. In addition, the memory 101 can comprise a non-volatile memory, such asa hard disk, RAM, a pluggable hard disk, a smart media card (SMC), a secured digital card (SD), a flash card, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0037] The at least one processor 102 may be a central processing unit (CPU), but also other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or the processor 102 may also be any conventional processor, etc., where the processor 102 is the control center of the electronic device 100 and uses various interfaces and lines to connect various parts of the overall electronic device 100.

[0038] The memory 101 in the electronic device 100 stores a plurality of instructions to implement a method for monitoring and controlling high-temperature corrosion of the water-cooled walls of a wall-type sectional boiler, and the processor 102 can execute the plurality of instructions: Detecting a structure of the water-cooled wall of the wall-like circular boiler, and Creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler; Obtaining real-time parameters of the water-cooled wall of the wall-type sectional circular boiler and constructing a relevant model corresponding to the real-time parameters in combination with the networked model; Simulate with the corresponding model through CFD data and obtain the three-dimensional model of the temperature field and the CO field of the combustion chamber; Obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and of the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; Obtaining the optimal deflection angles of the primary air nozzles and secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume when the flame brush wall appears in the boiler; Obtain the real-time air volume and optimal damper opening of the current CO field based on the CO concentration and real-time air volume in the boiler. Embodiment 10

[0039] The module / unit integrated into the electronic device 100 may be stored in a computer-readable storage medium if implemented as a software functional unit and sold or used as a standalone product. Based on this understanding, all or part of the process of the present invention for implementing all or part of the process in the method of the above embodiment may also be performed by means of a computer program for controlling the corresponding hardware. The computer program may be stored in a computer-readable storage medium that, when executed by a processor, implements the steps of each of the above embodiments of the method.If the computer program comprises computer program code, the computer program code may be in source code form, object code form, executable file form, or an intermediate form or the like. The computer-readable medium may include any device or apparatus capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk drive, a magnetic disk, a compact disk, computer memory, and read-only memory (ROM).

[0040] Those skilled in the art should appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining aspects of software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) containing computer-usable program code.

[0041] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each of the processes and / or boxes in the flowchart and / or block diagram, and the combination of processes and / or boxes in the flowchart and / or block diagram, may be implemented by computer program instructions.These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce an apparatus for performing the functions specified in the one or more processes of the flowchart and / or the one or more boxes of the block diagram.

[0042] These computer program instructions may also be stored in a computer-readable memory capable of instructing the computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in this computer-readable memory produce an article of manufacture comprising an instruction device that implements a function specified in one or more processes of the flowchart and / or one or more boxes of the block diagram.

[0043] These computer program instructions may also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on the computer or other programmable device to produce computer-implemented processing, such that the instructions executing on the computer or other programmable device provide steps for implementing the functionality specified in the flowchart, process or plurality of processes and / or the block diagram, box or plurality of boxes.

[0044] Finally, it should be noted that the above embodiments are only illustrative of the technical solutions of the present invention and are not intended to be limiting thereof; Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the present invention may still be modified or equivalently substituted, and any modification or equivalent substitution that does not deviate from the spirit and scope of the present invention is covered by the scope of the claims of the present invention. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 105605563A

[0003] CN 113464917A

[0004]

Claims

[1] Device for monitoring and controlling high-temperature corrosion of water-cooled walls of a wall-type cross-sectional boiler, characterized by that it includes: a meshed model creation module for obtaining a structure of the water-cooled wall of the wall-type sectional circular boiler and creating a meshed model based on the structure of the water-cooled wall of the wall-type sectional circular boiler; a correlation model creation module for obtaining real-time parameters of the water-cooled wall of the wall-type sectional-circle boiler and creating a correlation model corresponding to the real-time parameters in combination with the networked model; a three-dimensional model creation module used to simulate with the CFD data and the corresponding model to obtain the three-dimensional model of the temperature field and the CO field in the combustion chamber; an opening angle acquisition module for obtaining the deflection angles of various primary air nozzles and secondary air nozzles at different air volumes within the temperature field in the combustion chamber and the damper openings at different air volumes within the CO field based on the three-dimensional models of the temperature field and the CO field of the combustion chamber; a deflection angle adjustment module designed to obtain the optimal deflection angles of the primary air nozzles and the secondary air nozzles for the real-time air volume and the current temperature field in the combustion chamber based on the temperature and real-time air volume at the appearance of the flame wall brush in the boiler; a damper opening adjustment module designed to obtain an optimal damper opening for the real-time air volume and the current CO field based on the CO concentration and real-time air volume in the boiler.

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