Sagger motion sintering process temperature field dynamic simulation analysis method and system

Abstract

The invention relates to the technical field of thermal simulation, in particular to a dynamic simulation analysis method and system for a temperature field in a sagger movement sintering process, and the method comprises the steps: constructing a mathematical model of the movement of a sagger in a roller kiln, the mathematical model comprising airflow flowing in the kiln, roller movement and a heat exchange process; performing numerical discretization processing on the mathematical model through a finite element method, and simulating a heat exchange coupling effect with airflow in the kiln in a sagger motion project; through numerical solution, temperature field distribution of the sagger at different time points in the moving process is calculated, the dynamic change rule of the temperature of the sagger along with the movement is analyzed, and the influence of the temperature field change on the local thermal expansion of the sagger is evaluated; based on a temperature field distribution result, constructing a thermal stress analysis model, and calculating thermal stress and deformation of the saggar in a high-temperature environment in combination with basic parameters of a saggar material; coupling simulation is carried out on the air flow and the temperature field, and the design parameters of the saggar and the operation conditions of the roller kiln are optimized by analyzing the simulation result. By means of the method, the problem that a traditional method is difficult to deal with dynamic motion and complex heat exchange is effectively solved, efficient prediction and optimization of temperature field distribution are achieved, and the efficiency and precision of the sintering process are improved.

Description

Technical Field

[0001] The invention relates to the field of thermal simulation technology, and in particular to a method and system for dynamic simulation analysis of temperature field in a sagger motion sintering process. Background Art

[0002] Roller kiln is a common heat treatment equipment in modern ceramic, refractory, metal smelting and other industries. In the roller kiln, raw materials or products are usually transported through the roller system for heating, sintering and other treatments. The sagger, as a supporting container, protects the product from overheating, contamination, etc., and ensures that it can stably transfer heat in a high temperature environment.

[0003] However, due to the material, shape and complex movement state of the sagger in the kiln, the distribution and changes of the temperature field are highly time-varying and complex. Traditional temperature field analysis methods rely on experimental measurements or simplified theoretical models. However, in the roller kiln, due to the high temperature environment and the constantly changing movement trajectory of the sagger, experimental measurements are difficult and cannot meet the needs of precise control and optimization. Although numerical simulation has advantages in temperature field analysis, traditional static thermal analysis models are difficult to cope with the dynamic movement of the sagger and cannot accurately predict the temperature changes in the actual process. The sagger in the kiln is not only affected by the roller transmission, but may also be disturbed by factors such as hot air flow, roller speed fluctuations, and inclination changes, which makes its movement state complex and further affects the dynamic changes of the temperature field. Summary of the invention

[0004] The present invention provides a method and system for dynamic simulation analysis of temperature field in a sagger motion sintering process, thereby effectively solving the problems pointed out in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A method for dynamic simulation analysis of temperature field in sagger motion sintering process, comprising: Constructing a mathematical model of the movement of saggers in a roller kiln, the mathematical model includes the flow of air in the kiln, the movement of rollers and the heat exchange process; The mathematical model is numerically discretized by the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; Through numerical solution, the temperature field distribution of the sagger at different time points during the movement is calculated, the dynamic change of the sagger temperature with the movement is analyzed, and the impact of the temperature field change on the local thermal expansion of the sagger is evaluated; Based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated; The air flow and temperature field are coupled simulated, and the design parameters of the sagger and the operating conditions of the roller kiln are optimized by analyzing the simulation results.

[0006] Furthermore, based on the real-time monitoring data of the sagger temperature field and airflow parameters, combined with the dynamic feedback control mechanism, the dynamic operating parameters of the sagger and the heating power distribution in the kiln are adjusted.

[0007] Furthermore, a mathematical model of the movement of the sagger in the roller kiln is constructed, and the mathematical model includes the air flow in the kiln, the movement of the roller and the heat exchange process, including: Based on the basic conservation equations of fluid mechanics and turbulence models, the flow state of the gas in the kiln is described to simulate the dynamic changes of the airflow; A mathematical model of the movement of the sagger along the roller is established to simulate the movement trajectory and position change of the sagger on the roller, and to analyze the heat transfer and contact thermal resistance between the sagger and the roller. A convective heat transfer model between the sagger and the airflow in the kiln was constructed, and the heat exchange process between the sagger and the surrounding environment was simulated in combination with the thermal radiation model.

[0008] Furthermore, the mathematical model is numerically discretized by the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the airflow in the kiln, including: Based on the finite element method, the airflow, sagger movement and heat exchange process in the mathematical model are discretized, and the continuous space domain is divided into a finite number of units. A heat exchange coupling model between the sagger and the airflow in the kiln is established, and the temperature field of the airflow and the change of the surface temperature of the sagger are solved simultaneously through the coupling equation. In the discretization process, SIMPLE algorithm is used to couple the pressure and velocity fields. The dynamic boundary conditions during the movement of the sagger were set to simulate the heat exchange coupling between the sagger and the airflow in the kiln at different time points.

[0009] Furthermore, the dynamic mesh method is used to model the airflow and sagger movement areas in the kiln.

[0010] Furthermore, through numerical solution, the temperature field distribution of the sagger at different time points during the movement is calculated, the dynamic change of the sagger temperature with the movement is analyzed, and the impact of the temperature field change on the local thermal expansion of the sagger is evaluated, including: The time-stepping method is used to discretize the temperature field of the sagger at different time points during its movement, and the transient temperature distribution at each position on the surface and inside of the sagger is obtained. Based on the calculated temperature field distribution, the temperature variation of the sagger over time is analyzed, and the temperature variation curve of key parts is extracted; According to the thermal expansion coefficient and temperature change of the sagger material, the non-uniformity of the local thermal expansion of the sagger is evaluated, and the influence of the non-uniformity on the stability of the sagger structure is analyzed; Combined with the temperature field distribution results, the areas where thermal stress concentration may occur during the movement of the sagger are identified and stress assessment is performed.

[0011] Furthermore, based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated, including: Based on the temperature field distribution, the thermal expansion theory is used to establish a thermal stress analysis model for the sagger, and the temperature gradient is converted into thermal stress in the sagger. Introduce the basic parameters of sagger materials and analyze the influence of material properties on thermal stress distribution; The thermal stress of the sagger in a high temperature environment is calculated by the finite element method to identify the stress concentration area; Based on the results of thermal stress analysis, the deformation of the sagger under high temperature conditions was calculated, and the influence of the deformation on the structural integrity of the sagger was evaluated.

[0012] Furthermore, the airflow and temperature field are coupled simulated, and the design parameters of the sagger and the operating conditions of the roller kiln are optimized by analyzing the simulation results, including: Based on the airflow and temperature field coupling simulation technology, the heat exchange and temperature distribution between the sagger and the airflow in the kiln during its movement are simulated; Through the simulation results, the dynamic change law of the temperature field inside and on the surface of the sagger is analyzed, and the uneven areas in the temperature field distribution are identified; Based on simulation analysis, the design parameters of the sagger are optimized, and the operating conditions of the roller kiln are adjusted according to the results of the coupled analysis of airflow and temperature field.

[0013] A temperature field dynamic simulation analysis system for sagger motion sintering process, comprising: A mathematical model building module is used to build a mathematical model of the movement of the sagger in the roller kiln, wherein the mathematical model includes the flow of air in the kiln, the movement of the roller and the heat exchange process; A numerical discretization processing module is used to perform numerical discretization processing on the mathematical model by using the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; The temperature field analysis module calculates the temperature field distribution of the sagger at different time points during its movement through numerical solution, analyzes the dynamic change of the sagger temperature with movement, and evaluates the impact of the temperature field change on the local thermal expansion of the sagger; Thermal stress analysis module: Based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated; The coupled simulation optimization module performs coupled simulation on the airflow and temperature field, and optimizes the design parameters of the sagger and the operating conditions of the roller kiln by analyzing the simulation results.

[0014] Furthermore, the mathematical model building module includes: Gas dynamic simulation unit, based on the basic conservation equations of fluid mechanics and turbulence models, describes the flow state of gas in the kiln and simulates the dynamic changes of airflow; Sagger motion modeling unit, which establishes a mathematical model of the sagger moving along the roller, simulates the motion trajectory and position change of the sagger on the roller, and analyzes the heat transfer and contact thermal resistance between the sagger and the roller; The heat exchange modeling unit constructs a convective heat transfer model between the sagger and the airflow in the kiln, and combines the thermal radiation model to simulate the heat exchange process between the sagger and the surrounding environment.

[0015] The technical solution of the present invention can achieve the following technical effects: It effectively solves the problem that traditional methods are difficult to cope with dynamic motion and complex heat exchange, realizes efficient prediction and optimization of temperature field distribution, and improves the efficiency and accuracy of the sintering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a flow chart of a dynamic simulation analysis method of temperature field in sagger motion sintering process; Figure 2 A schematic diagram of the process for constructing a mathematical model of the sagger movement in a roller kiln; Figure 3 It is a schematic diagram of the process of numerical discretization of mathematical models by finite element method; Figure 4 A schematic diagram of the process for calculating the temperature field distribution of the sagger at different time points during its movement and evaluating the influence of local thermal expansion; Figure 5 Schematic diagram of the process for building a thermal stress analysis model and calculating the thermal stress and deformation of the sagger; Figure 6 A schematic diagram of the process for optimizing the design parameters of the sagger and the operating conditions of the roller kiln. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] Embodiment 1 like Figure 1 As shown, the present invention provides a method for dynamic simulation analysis of temperature field in a sagger motion sintering process, the method comprising: S1: Construct a mathematical model of the movement of the sagger in the roller kiln, which includes the air flow in the kiln, the movement of the rollers and the heat exchange process; Specifically, this model can systematically reflect the dynamic behavior of the sagger in a high-temperature environment, especially the effects of airflow, heat transfer and motion trajectory on the temperature field distribution, providing a theoretical basis and data support for subsequent numerical simulation, temperature field dynamic change analysis and system optimization.

[0021] S2: numerically discretizing the mathematical model by finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; Specifically, the complex continuous mathematical model is discretized in space and time, so as to transform the interaction between airflow, sagger movement and heat exchange into a discrete form that can be numerically calculated. In this process, by dividing the airflow area in the kiln and the heating area of ​​the sagger into a finite number of discrete units, the local details and dynamic changes of the heat exchange between the airflow and the sagger can be captured more accurately. The introduction of the finite element method can also cope with engineering problems with complex geometric structures, nonlinear physical properties and diverse boundary conditions, ensuring that the simulation results of the heat exchange process during the movement of the sagger have high accuracy and stability. Through numerical discretization processing, it provides a reliable calculation basis for subsequent numerical solutions and temperature field distribution analysis, and can also support dynamic simulation and optimization under different working conditions.

[0022] S3: Calculate the temperature field distribution of the sagger at different time points during the movement through numerical solution, analyze the dynamic change of the sagger temperature with movement, and evaluate the impact of the temperature field change on the local thermal expansion of the sagger; Specifically, the temperature field distribution of the sagger at different time points during the movement is calculated by numerical solution, the transient temperature field change law of the sagger under complex movement conditions is accurately simulated, and the heat transfer characteristics and dynamic thermal behavior of the sagger in a high-temperature environment are comprehensively analyzed. Through this step, the change of temperature along the movement trajectory of the sagger can be quantified, and the uneven effect of temperature gradient on the thermal expansion of the local area of ​​the sagger can be revealed. Based on these results, the stress distribution and deformation caused by the thermal expansion of the sagger can be evaluated, providing a scientific basis for optimizing the material selection, geometric design and production process parameters of the sagger, and ultimately ensuring that the sagger has high stability and durability during high-temperature sintering.

[0023] S4: Based on the temperature field distribution results, a thermal stress analysis model is constructed, and the thermal stress and deformation of the sagger in a high temperature environment are calculated by combining the basic parameters of the sagger material; Specifically, the transient temperature field distribution data of the sagger is used in combination with its material properties, such as elastic modulus, Poisson's ratio and thermal expansion coefficient, to accurately calculate the thermal stress and deformation behavior of the sagger in a high temperature environment. Through this step, areas inside and on the surface of the sagger where thermal stress concentration may occur can be identified, the impact of thermal stress on structural integrity and service life can be analyzed, and the deformation characteristics and failure risk of the sagger in a complex thermal environment can be further predicted.

[0024] S5: Coupled simulation of air flow and temperature field is performed, and by analyzing the simulation results, the design parameters of the sagger and the operating conditions of the roller kiln are optimized.

[0025] Specifically, the purpose of coupling simulation of airflow and temperature field is to fully understand the heat transfer and heating law of sagger in high temperature environment by simulating the dynamic interaction between airflow distribution and temperature field during the movement of sagger. Through the analysis of simulation results, the key factors affecting the uniformity of temperature distribution and heat transfer efficiency of sagger can be identified, so as to optimize the design parameters of sagger (such as material, geometry, structural size) and the operating conditions of roller kiln (such as airflow velocity, heating power distribution, roller speed, etc.).

[0026] As a preferred embodiment of the above, based on the real-time monitoring data of the sagger temperature field and airflow parameters, combined with a dynamic feedback control mechanism, the dynamic operating parameters of the sagger and the heating power distribution in the kiln are adjusted.

[0027] Specifically, temperature sensors and airflow measuring devices are arranged on the surface of the sagger and at key positions in the kiln to obtain in real time the temperature field distribution and airflow parameters during the operation of the sagger. According to the real-time monitoring data, the established temperature field and airflow characteristic models are used for analysis to determine the movement speed and trajectory of the sagger and the power distribution adjustment strategy for each heating zone in the kiln. By adjusting the dynamic operating parameters of the sagger, the temperature changes in different temperature zones meet the expected goals. At the same time, the distribution of heating power in the kiln is optimized to ensure the uniformity of the temperature field and the stability of heat transfer, thereby improving the efficiency of the sintering process and the quality of the product. The entire adjustment process is completed by relying on real-time monitoring and feedback mechanisms to ensure that the sagger is always in the optimal state during the dynamic operation.

[0028] As a preferred embodiment of the above, Figure 2 As shown, step S1, constructing a mathematical model of the movement of the sagger in the roller kiln, the mathematical model includes the air flow in the kiln, the roller movement and the heat exchange process, including: S11: Based on the basic conservation equations of fluid mechanics and turbulence models, the flow state of the gas in the kiln is described, and the dynamic changes of the airflow are simulated; S12: Establish a mathematical model of the movement of the sagger along the roller, simulate the movement trajectory and position change of the sagger on the roller, and analyze the heat transfer and contact thermal resistance between the sagger and the roller; S13: Construct a convection heat transfer model between the sagger and the airflow in the kiln, and combine it with the thermal radiation model to simulate the heat exchange process between the sagger and the surrounding environment.

[0029] Specifically, firstly, based on the basic conservation equations and turbulence models of fluid mechanics, a mathematical model of gas flow in the kiln is established. By describing the dynamic characteristics of airflow such as velocity distribution, pressure change and vortex generation, the dynamic change of airflow in the kiln is simulated, and the motion law of airflow is accurately described in combination with the geometric structure and boundary conditions of the roller kiln; secondly, combined with the actual operation of the sagger driven by the roller, a mathematical model of sagger movement is established to describe the motion trajectory, velocity change and position distribution of the sagger on the roller. At the same time, the heat transfer process between the sagger and the roller is analyzed to quantify the influence of contact thermal resistance on the heat transfer of the sagger; finally, for the heat exchange behavior between the sagger and the airflow in the kiln and the surrounding environment, a convection heat transfer model and a thermal radiation model are constructed to accurately simulate the heat exchange coefficient between the sagger surface and the airflow, and the radiation heat transfer between the sagger and the high temperature environment is quantified through the radiation model. The entire mathematical model systematically describes the coupling relationship between the airflow, sagger movement and heat exchange process in the kiln, providing a theoretical basis for subsequent numerical simulation and optimization design.

[0030] As a preferred embodiment of the above, Figure 3As shown, step S2 is to perform numerical discretization processing on the mathematical model by using the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln, including: S21: Based on the finite element method, the airflow, sagger movement and heat exchange process in the mathematical model are discretized, and the continuous space domain is divided into a finite number of units; S22: Establish a heat exchange coupling model between the sagger and the airflow in the kiln, and solve the temperature field of the airflow and the change of the surface temperature of the sagger through the coupling equation; S23: In the discretization process, SIMPLE algorithm is used to couple the pressure and velocity fields; S24: Set dynamic boundary conditions during the movement of the sagger to simulate the heat exchange coupling between the sagger and the airflow in the kiln at different time points.

[0031] Specifically, firstly, based on the finite element method, the airflow, sagger movement and heat exchange process involved in the mathematical model are discretized. By dividing the continuous spatial domain into a finite number of units, the complex mathematical model is converted into a form that can be numerically solved. Then, a heat exchange coupling model between the sagger and the airflow in the kiln is established, and the temperature field change of the airflow and the dynamic response of the sagger surface temperature are combined to ensure that the heat exchange process can accurately reflect the dynamic interaction between the airflow and the sagger. To ensure the simulation accuracy, the SIMPLE algorithm is used in the discretization solution process to couple the pressure field and the velocity field to solve the nonlinear coupling relationship between turbulence and heat flow problems. In addition, the dynamic boundary conditions in the sagger movement process are set to accurately simulate the relative position relationship between the sagger and the airflow at different time points and the changes in heat exchange. Through the above numerical discretization processing, the heat exchange coupling effect between the sagger and the airflow during the movement of the sagger can be accurately simulated, providing support for subsequent temperature field calculations and dynamic analysis.

[0032] As a preferred embodiment of the above embodiment, a dynamic grid method is used to model the airflow in the kiln and the movement area of ​​the sagger.

[0033] Specifically, the kiln fluid area and the moving area where the sagger is located are first divided into dynamic grid units. Through the adaptive update of the grid, the real-time adjustment of the grid during the movement of the sagger is realized to ensure that the interaction between the sagger and the surrounding airflow can be accurately described; then, the movement law of the sagger is defined in the dynamic grid area, including parameters such as movement speed, trajectory and direction, to simulate the dynamic characteristics of the sagger when it moves with the roller; at the same time, the slip condition is set at the boundary where the airflow area contacts the sagger, and the grid movement rules of the boundary interface are defined, so that the airflow grid can be updated in real time with the movement of the sagger, ensuring that the heat exchange model between the airflow and the sagger can maintain the calculation accuracy and stability. The use of the dynamic grid method effectively solves the grid deformation problem of the coupled calculation of the airflow and temperature field during the movement of the sagger, and further improves the accuracy and calculation efficiency of the simulation.

[0034] As a preferred embodiment of the above, Figure 4 As shown, step S3, through numerical solution, calculates the temperature field distribution of the sagger at different time points during the movement, analyzes the dynamic change law of the sagger temperature with the movement, and evaluates the impact of the temperature field change on the local thermal expansion of the sagger, including: S31: using the time stepping method, discretizing the temperature field of the sagger at different time points during the movement process, and obtaining the transient temperature distribution at each position on the surface and inside of the sagger; S32: Based on the calculated temperature field distribution, analyzing the temperature variation of the sagger over time, and extracting the temperature variation curve of key parts; S33: According to the thermal expansion coefficient and temperature change of the sagger material, the non-uniformity of the local thermal expansion of the sagger is evaluated, and the influence of the non-uniformity on the stability of the sagger structure is analyzed; S34: Combined with the temperature field distribution results, identify areas where thermal stress concentration may occur during the movement of the sagger, and perform stress assessment.

[0035] Specifically, firstly, the temperature field of the sagger during movement is discretized and calculated by the time stepping method, and the surface and interior of the sagger are divided into finite elements. The temperature field is updated step by step to obtain the transient temperature distribution of different positions of the sagger. Then, based on the calculated temperature field distribution, the variation law of the sagger temperature with the movement time is analyzed, and the temperature variation curves of the key parts of the sagger are extracted, such as the temperature variation of the surface, internal center and edge of the sagger, to reveal the inhomogeneity of the temperature distribution and its dynamic evolution over time. Then, according to the thermal expansion coefficient and temperature change of the sagger material, the thermal expansion of the local area of ​​the sagger is calculated, and the potential influence of the thermal expansion difference caused by temperature inhomogeneity on the stability of the sagger structure is evaluated, including the possibility of deformation behavior and thermal stress. Finally, combined with the temperature field distribution results, the possible thermal stress concentration areas that may appear during the movement of the sagger are identified, and detailed stress evaluation is performed on these areas to provide a basis for optimizing the selection of sagger materials and design parameters. Through the above steps, the temperature field and thermal expansion characteristics of the sagger under dynamic operating conditions can be comprehensively analyzed to ensure its structural reliability and stability in high temperature environments.

[0036] As a preferred embodiment of the above, Figure 5 As shown, step S4, based on the temperature field distribution results, a thermal stress analysis model is constructed, and the thermal stress and deformation of the sagger in a high temperature environment are calculated in combination with the basic parameters of the sagger material, including: S41: Based on the temperature field distribution, the thermal expansion theory is used to establish a thermal stress analysis model for the sagger, and the temperature gradient is converted into thermal stress in the sagger; S42: Introduce the basic parameters of sagger materials and analyze the influence of material properties on thermal stress distribution; S43: Calculate the thermal stress of the sagger in a high temperature environment by using the finite element method and identify the stress concentration area; S44: Based on the results of thermal stress analysis, calculate the deformation of the sagger under high temperature conditions and evaluate the impact of the deformation on the structural integrity of the sagger.

[0037] Specifically, firstly, based on the calculated temperature field distribution, a thermal stress analysis model of the sagger is established using the thermal expansion theory. By converting the temperature gradient into the thermal stress distribution equation inside the sagger, the stress state of the sagger under different temperature field conditions is accurately described. Then, the basic parameters of the sagger material, including elastic modulus, Poisson's ratio and thermal expansion coefficient, are introduced to analyze the influence of the thermophysical properties of the material on the thermal stress distribution, so as to ensure that the model can reflect the true behavior of the sagger material in a high-temperature environment. Subsequently, the thermal stress of the sagger is numerically solved by the finite element method to obtain the thermal stress distribution at various positions inside and on the surface of the sagger, with a focus on identifying possible stress concentration areas, so as to provide a reference for subsequent structural optimization. Finally, based on the thermal stress analysis results, the deformation of the sagger under high temperature conditions is further calculated, the influence of deformation on the structural integrity of the sagger is quantified, and its stability and reliability during high-temperature sintering are evaluated.

[0038] As a preferred embodiment of the above, Figure 6 As shown, step S5 is to perform coupled simulation on the airflow and temperature field, and optimize the design parameters of the sagger and the operating conditions of the roller kiln by analyzing the simulation results, including: S51: Based on the airflow and temperature field coupling simulation technology, the heat exchange and temperature distribution between the sagger and the airflow in the kiln during its movement are simulated; S52: Through the simulation results, the dynamic change law of the temperature field inside and on the surface of the sagger is analyzed to identify the uneven areas in the temperature field distribution; S53: Based on simulation analysis, the design parameters of the sagger are optimized, and the operating conditions of the roller kiln are adjusted according to the results of the coupled analysis of airflow and temperature field.

[0039] Specifically, firstly, based on the airflow and temperature field coupling simulation technology, a heat exchange model between the airflow in the kiln and the sagger is established. The interaction between the sagger and the airflow in the kiln during movement is simulated, including the airflow velocity, direction, temperature distribution and its influence on the temperature field of the sagger, so as to obtain the temperature change of the surface and inside of the sagger; then, by analyzing the simulation results, the dynamic change law of the internal and surface temperature fields during the movement of the sagger is extracted, and the uneven areas in the temperature field distribution and the positions that may cause thermal stress concentration are identified to reveal the thermal characteristics and possible problems of the sagger under different operating conditions; then, based on the simulation analysis results, the design parameters of the sagger are optimized, including its geometric shape, size and material selection, to ensure that the sagger has better heat transfer performance and structural stability in a high temperature environment; at the same time, according to the specific results of the airflow and temperature field coupling analysis, the operating conditions of the roller kiln are adjusted, including the optimization of airflow velocity, heating power distribution and roller speed parameters, so as to improve the overall thermal efficiency of the system and the heating uniformity of the product. Through the above steps, the operating performance of the sagger and the operating effect of the roller kiln can be effectively improved, and the stability of the production process and the energy utilization efficiency can be improved.

[0040] Embodiment 2 Based on the same inventive concept as the method for dynamic simulation analysis of temperature field in sagger motion sintering process in the aforementioned embodiment, the present invention further provides a system for dynamic simulation analysis of temperature field in sagger motion sintering process, the system comprising: Mathematical model building module, which builds the mathematical model of the movement of the sagger in the roller kiln. The mathematical model includes the air flow in the kiln, the movement of the roller and the heat exchange process; Numerical discretization processing module, which uses the finite element method to perform numerical discretization on the mathematical model and simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; The temperature field analysis module calculates the temperature field distribution of the sagger at different time points during its movement through numerical solution, analyzes the dynamic change of the sagger temperature with movement, and evaluates the impact of the temperature field change on the local thermal expansion of the sagger; Thermal stress analysis module: Based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated; The coupled simulation optimization module performs coupled simulation on the airflow and temperature field, and optimizes the design parameters of the sagger and the operating conditions of the roller kiln by analyzing the simulation results.

[0041] The above-mentioned evaluation system in the present invention can effectively realize the dynamic simulation analysis method of the temperature field of the sagger motion sintering process, and the technical effects that can be achieved are as described in the above-mentioned embodiments and will not be repeated here.

[0042] As a preferred embodiment of the above, the mathematical model building module includes: Gas dynamic simulation unit, based on the basic conservation equations of fluid mechanics and turbulence models, describes the flow state of gas in the kiln and simulates the dynamic changes of airflow; Sagger motion modeling unit, which establishes a mathematical model of the sagger moving along the roller, simulates the motion trajectory and position change of the sagger on the roller, and analyzes the heat transfer and contact thermal resistance between the sagger and the roller; The heat exchange modeling unit constructs a convective heat transfer model between the sagger and the airflow in the kiln, and combines the thermal radiation model to simulate the heat exchange process between the sagger and the surrounding environment.

[0043] Similarly, the above-mentioned optimization schemes for the system can also respectively achieve the optimization effects corresponding to the method in Example 1, which will not be repeated here.

[0044] Although the present application has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the present application as defined herein, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these modifications and variations.

Claims

1. A dynamic simulation analysis method for temperature field in sagger motion sintering process, characterized in that: include: Constructing a mathematical model of the movement of saggers in a roller kiln, the mathematical model includes the flow of air in the kiln, the movement of rollers and the heat exchange process; The mathematical model is numerically discretized by the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; Through numerical solution, the temperature field distribution of the sagger at different time points during the movement is calculated, the dynamic change of the sagger temperature with the movement is analyzed, and the impact of the temperature field change on the local thermal expansion of the sagger is evaluated; Based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated; The air flow and temperature field are coupled simulated, and the design parameters of the sagger and the operating conditions of the roller kiln are optimized by analyzing the simulation results.

2. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: Based on the real-time monitoring data of the sagger temperature field and airflow parameters, combined with the dynamic feedback control mechanism, the dynamic operating parameters of the sagger and the heating power distribution in the kiln are adjusted.

3. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: A mathematical model of the movement of the sagger in the roller kiln is constructed, and the mathematical model includes the air flow in the kiln, the roller movement and the heat exchange process, including: Based on the basic conservation equations of fluid mechanics and turbulence models, the flow state of the gas in the kiln is described to simulate the dynamic changes of the airflow; A mathematical model of the movement of the sagger along the roller is established to simulate the movement trajectory and position change of the sagger on the roller, and to analyze the heat transfer and contact thermal resistance between the sagger and the roller. A convective heat transfer model between the sagger and the airflow in the kiln was constructed, and the heat exchange process between the sagger and the surrounding environment was simulated in combination with the thermal radiation model.

4. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: The mathematical model is numerically discretized by the finite element method to simulate the heat exchange coupling between the sagger movement engineering and the air flow in the kiln, including: Based on the finite element method, the airflow, sagger movement and heat exchange process in the mathematical model are discretized, and the continuous space domain is divided into a finite number of units. A heat exchange coupling model between the sagger and the airflow in the kiln is established, and the temperature field of the airflow and the change of the surface temperature of the sagger are solved simultaneously through the coupling equation. In the discretization process, SIMPLE algorithm is used to couple the pressure and velocity fields. The dynamic boundary conditions during the movement of the sagger were set to simulate the heat exchange coupling between the sagger and the airflow in the kiln at different time points.

5. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 4 is characterized in that: The dynamic mesh method is used to model the airflow and sagger movement areas in the kiln.

6. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: Through numerical solution, the temperature field distribution of the sagger at different time points during the movement is calculated, the dynamic change of the sagger temperature with movement is analyzed, and the impact of the temperature field change on the local thermal expansion of the sagger is evaluated, including: The time-stepping method is used to discretize the temperature field of the sagger at different time points during its movement, and the transient temperature distribution at each position on the surface and inside of the sagger is obtained. Based on the calculated temperature field distribution, the temperature variation of the sagger over time is analyzed, and the temperature variation curve of key parts is extracted; According to the thermal expansion coefficient and temperature change of the sagger material, the non-uniformity of the local thermal expansion of the sagger is evaluated, and the influence of the non-uniformity on the stability of the sagger structure is analyzed; Combined with the temperature field distribution results, the areas where thermal stress concentration may occur during the movement of the sagger are identified and stress assessment is performed.

7. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: Based on the temperature field distribution results, a thermal stress analysis model is constructed. Combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated, including: Based on the temperature field distribution, the thermal expansion theory is used to establish a thermal stress analysis model for the sagger, and the temperature gradient is converted into thermal stress in the sagger. Introduce the basic parameters of sagger materials and analyze the influence of material properties on thermal stress distribution; The thermal stress of the sagger in a high temperature environment is calculated by the finite element method to identify the stress concentration area; Based on the results of thermal stress analysis, the deformation of the sagger under high temperature conditions was calculated, and the influence of the deformation on the structural integrity of the sagger was evaluated.

8. The method for dynamic simulation analysis of temperature field in sagger motion sintering process according to claim 1 is characterized in that: The air flow and temperature field are coupled simulated. By analyzing the simulation results, the design parameters of the sagger and the operating conditions of the roller kiln are optimized, including: Based on the airflow and temperature field coupling simulation technology, the heat exchange and temperature distribution between the sagger and the airflow in the kiln during its movement are simulated; Through the simulation results, the dynamic change law of the temperature field inside and on the surface of the sagger is analyzed, and the uneven areas in the temperature field distribution are identified; Based on simulation analysis, the design parameters of the sagger are optimized, and the operating conditions of the roller kiln are adjusted according to the results of the coupled analysis of airflow and temperature field.

9. A dynamic simulation and analysis system for temperature field of sagger motion sintering process, characterized in that: include: A mathematical model building module is used to build a mathematical model of the movement of the sagger in the roller kiln, wherein the mathematical model includes the flow of air in the kiln, the movement of the roller and the heat exchange process; A numerical discretization processing module is used to perform numerical discretization processing on the mathematical model by using the finite element method to simulate the heat exchange coupling effect between the sagger movement engineering and the air flow in the kiln; The temperature field analysis module calculates the temperature field distribution of the sagger at different time points during its movement through numerical solution, analyzes the dynamic change of the sagger temperature with movement, and evaluates the impact of the temperature field change on the local thermal expansion of the sagger; Thermal stress analysis module: Based on the temperature field distribution results, a thermal stress analysis model is constructed, and combined with the basic parameters of the sagger material, the thermal stress and deformation of the sagger in a high temperature environment are calculated; The coupled simulation optimization module performs coupled simulation on the airflow and temperature field, and optimizes the design parameters of the sagger and the operating conditions of the roller kiln by analyzing the simulation results.

10. The temperature field dynamic simulation analysis system of sagger motion sintering process according to claim 9, characterized in that: The mathematical model building module includes: Gas dynamic simulation unit, based on the basic conservation equations of fluid mechanics and turbulence models, describes the flow state of gas in the kiln and simulates the dynamic changes of airflow; Sagger motion modeling unit, which establishes a mathematical model of the sagger moving along the roller, simulates the motion trajectory and position change of the sagger on the roller, and analyzes the heat transfer and contact thermal resistance between the sagger and the roller; The heat exchange modeling unit constructs a convective heat transfer model between the sagger and the airflow in the kiln, and combines the thermal radiation model to simulate the heat exchange process between the sagger and the surrounding environment.

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