WO2021207953A1 - Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method - Google Patents

Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method Download PDF

Info

Publication number
WO2021207953A1
WO2021207953A1 PCT/CN2020/084816 CN2020084816W WO2021207953A1 WO 2021207953 A1 WO2021207953 A1 WO 2021207953A1 CN 2020084816 W CN2020084816 W CN 2020084816W WO 2021207953 A1 WO2021207953 A1 WO 2021207953A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbonization furnace
temperature carbonization
low
workbench
temperature
Prior art date
Application number
PCT/CN2020/084816
Other languages
French (fr)
Chinese (zh)
Inventor
张毅鹏
孙中心
张潇引
Original Assignee
天华化工机械及自动化研究设计院有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天华化工机械及自动化研究设计院有限公司 filed Critical 天华化工机械及自动化研究设计院有限公司
Priority to PCT/CN2020/084816 priority Critical patent/WO2021207953A1/en
Publication of WO2021207953A1 publication Critical patent/WO2021207953A1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/08—Thermal analysis or thermal optimisation

Definitions

  • the invention relates to the technical field of oxygen content distribution testing at the design stage of a low-temperature carbonization furnace.
  • the low-temperature carbonization furnace is one of its key equipment.
  • the low-temperature carbonization furnace is relative to the high-temperature carbonization furnace.
  • the low-temperature range generally refers to 300°C to 1000°C.
  • insulation materials stainless steel muffle, muffle counterweight device, heating element, sensing element, inlet nitrogen seal, outlet cooling water tank, outlet nitrogen seal, muffle gas detection device, high-purity nitrogen pipeline system, electrical temperature control And other system composition.
  • the stainless steel muffle is a key component of the low-temperature carbonization furnace. It has long-term operation in a high-temperature environment of 300°C to 1000°C. It will be deformed when heated. Due to the temperature difference, there are temperature differences and deformations.
  • the current production of enterprises is based on imitation, and importing key equipment is the main method to solve the equipment problem, especially for production lines with larger production capacity, such as oxidation furnaces and carbonization furnaces for thousand-ton carbon fiber production lines.
  • the United States prohibits exports to China. equipment. If the current passive situation is to be changed and industrial safety threats are eliminated, the independent development of localization and industrialization of carbon fiber production line equipment needs to be solved urgently, and continuous improvement and research by carbon fiber-related professional researchers are also needed. Therefore, it is necessary to choose a reasonable design method, which can make the furnace wall reach a surface temperature that meets the specifications, and reduce the unit energy consumption is a technical problem facing the current.
  • the purpose of the present invention is to solve the technical problems existing in the design stage of the low-temperature carbonization furnace in the prior art, and to propose a method for simulating the oxygen content distribution of the low-temperature carbonization furnace based on WORKBENCH.
  • the method includes the following steps:
  • step S2 Transfer the 3D simulation model of the muffle cavity of the carbonization furnace and the sealed cavity of the inlet and outlet established in step S1 to the Mesh module, and use the Sweep method to mesh the 3D simulation model in the Mesh module;
  • step S3 Transfer the three-dimensional simulation model completed in step S2 to the CFX calculation module of the WORKBENCH software, and set the parameters in the CFX calculation module;
  • the geometric parameters set in step S1 at least include: muffle cavity geometric shape, geometric size, inlet and outlet sealing geometric shape, geometric size, inlet and outlet sealed nitrogen pipe inlet size, and nitrogen pipe outlet size.
  • step (3) the process of parameter setting in the CFX calculation module is as follows:
  • step S4 the center point of the three-dimensional simulation model in the muffle furnace is selected as the detection point, and the detection surface is an X-direction plane passing the center point.
  • step S4 the simulation result includes: the temperature change curve of the detection point, the velocity cloud image of the detection surface, and the temperature cloud image of the detection surface.
  • the previous methods usually use a single sensor test, while the present invention uses the temperature change curve of the monitoring point and the temperature cloud map and the speed cloud map of the detection surface to determine the heat storage in the furnace Ability to better measure structural design.
  • the method of the present invention can obtain the heat storage capacity in the muffle furnace at different time periods, the temperature and velocity distribution rules in the furnace under different flow speeds and different oxygen contents, so as to provide a reference for the design of low-temperature carbonization furnaces.
  • Fig. 1 is a schematic diagram of a three-dimensional model established in the simulation method of the present invention.
  • Figure 2 is a schematic diagram of the temperature cloud diagram of the monitoring surface of the present invention with different oxygen content.
  • Fig. 3 is a schematic diagram of the oxygen content cloud diagram of the detection surface of the present invention when the oxygen content is different.
  • the oxygen content distribution simulation method based on WORKBENCH low-temperature carbonization furnace disclosed in the present invention includes the following steps:
  • step S2 Transfer the 3D simulation model of the muffle cavity of the carbonization furnace and the sealed cavity of the inlet and outlet established in step S1 to the Mesh module, and use the Sweep method to mesh the 3D simulation model in the Mesh module.
  • step S3 Transfer the three-dimensional simulation model completed in step S2 to the CFX calculation module of the WORKBENCH software, and set the parameters in the CFX calculation module; the process of setting the parameters in the CFX calculation module is as follows:
  • the simulation result includes: a temperature change curve of a detection point, a velocity cloud image of the detection surface, and a temperature cloud image of the detection surface.
  • the present invention defines the ventilation time period through Expression, in Fluid Modify the oxygen content in the Boundary Conditions in the Values option, and modify the airflow pressure in the static pressure of the inlet boundary to obtain the change law of the pressure in the sealed chamber and the heat storage capacity in the muffle furnace under different oxygen contents. Comparing the three kinds of oxygen content, the trend of the temperature change curve is the same, but the heat storage capacity of different air flow speeds is different. In summary, the airflow velocity has a delay effect on the temperature change. It can be seen that the gas on the furnace wall has a good heat preservation effect, and its heat storage performance is superior; from the temperature cloud diagram of the detection surface of different oxygen content, as shown in Figure 2, it shows the furnace cavity The internal temperature distribution is uniform.
  • the schematic diagram of the oxygen content cloud diagram of the detection surface from different time periods shows that the oxygen content in the muffle chamber is uneven, and the oxygen content concentration starts to increase along the furnace chamber entrance, indicating the existence of airflow organization in the furnace chamber Unreasonable place.
  • WORKBENCH simulation results should be performed, and the experimental results should be compared and analyzed, and the best solution for the gas distribution and heat storage performance of the muffle furnace cavity should be obtained.
  • the present invention simulates the heat flow field in the design process of the low-temperature carbonization furnace, optimizes the structure design, reduces the manufacturing cost of the low-temperature carbonization furnace without reducing the existing thermal insulation effect, can reduce the experimental cost, and optimize the design. It provides theoretical support for reducing the energy consumption of carbon fiber production, and also provides a basis for related numerical simulation research, and overcomes the shortcomings of the existing technology in the low-temperature carbonization furnace design stage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Evolutionary Computation (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

A WORKBENCH-based low-temperature carbonization furnace oxygen content distribution simulation method, relating to the technical field of oxygen content distribution testing in a low-temperature carbonization furnace design stage. The technical problems existing in the low-temperature carbonization furnace design stage in the prior art are solved. The method comprises the steps of: S1, establishing a three-dimensional simulation model of a muffle cavity and an inlet and outlet sealing cavity of a low-temperature carbonization furnace by adopting a CAD software Design Modeler module in WORKBENCH software; S2, delineating a grid in the three-dimensional simulation model; S3, transmitting to a CFX calculation module of the WORKBENCH software, and setting parameters in the CFX calculation module; S4, setting a detection point and a detection surface, carrying out a simulation operation to obtain a simulation result, and taking the simulation result as an index for designing a muffle cavity structure and an inlet and outlet sealing structure of the low-temperature carbonization furnace; and S5, setting different parameters and repeating the steps S1 to S4 so as to determine the optimal hearth heat storage capacity and airflow distribution design. According to the method, the structural design can be better evaluated, the design costs are reduced, and reference is provided for design in a low-temperature carbonization furnace.

Description

基于WORKBENCH低温碳化炉氧含量分布模拟方法Based on WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method 技术领域Technical field
本发明涉及到低温碳化炉设计阶段氧含量分布测试技术领域。The invention relates to the technical field of oxygen content distribution testing at the design stage of a low-temperature carbonization furnace.
背景技术Background technique
生产碳纤维生产过程中，低温碳化炉是其关键设备之一，低温碳化炉是相对于高温碳化炉而言，低温范围一般指的是300℃到1000℃，低温碳化炉主要由架体（炉壳）、保温材料、不锈钢马弗、马弗配重装置、加热元件、传感元件、入口氮封、出口冷却水箱、出口氮封、马弗内气体检测装置、高纯氮气管道***、电器控温等***组成。其中，不锈钢马弗是低温碳化炉的关键部件，长期工作在300℃到1000℃的高温环境下，受热有较大的变形，由于各处温度不同存在着温差应力和变形，其气密性、寿命、变形、局部应力等极大的影响着低温碳化炉的性能和使用寿命。并且，不锈钢马弗内的温度均匀性，温差的大小，对最终碳纤维的质量和稳定性有着巨大的影响。经讨论和分析，判断造成以上不足的主要原因可能是低温碳化炉的不锈钢马弗的结构、变形、排气口位置和截面积不够及内部的温度均匀性。经过近四十年的发展和研制，虽然我国的碳纤维已经制备出与国外T300水平相近的产品，但是碳纤维的年产量与产品性能还远不能满足国内市场对其的需求。与国际先进的碳纤维产品技术水平对比，国产碳纤维的主要问题，突出体现在碳纤维均匀性能和碳纤维稳定性较差，究其主要原因，除了碳纤维工艺受到国外的限制，另一重要影响因素就是碳纤维生产过程中的主要生产设备落后于国外。当前局势是以美国和日本作为代表的国外的发达国家，垄断着高性能碳纤维的设备生产技术，并且高度重视防范技术外流，相对比中国在碳纤维研发领域的发展相对落后，产业化脚步行进缓慢，目前的企业生产以模仿为主，进口关键设备是解决设备问题的主要方法，尤其是产能较大的生产线如千吨级碳纤维生产线用氧化炉、碳化炉等碳化关键设备，美国是禁止向中国出口设备的。如果要改变当前的被动局面，破除产业安全威胁，碳纤维生产线设备实现国产化和产业化的自主发展亟待解决，并也需要碳纤维相关专业研究人员不断的进行改进和研究。因此需要选择合理的设计方法，可以使炉壁能达到符合规范的表面温度，降低单位能耗是现有面临的技术难题。In the production process of carbon fiber production, the low-temperature carbonization furnace is one of its key equipment. The low-temperature carbonization furnace is relative to the high-temperature carbonization furnace. The low-temperature range generally refers to 300°C to 1000°C. ), insulation materials, stainless steel muffle, muffle counterweight device, heating element, sensing element, inlet nitrogen seal, outlet cooling water tank, outlet nitrogen seal, muffle gas detection device, high-purity nitrogen pipeline system, electrical temperature control And other system composition. Among them, the stainless steel muffle is a key component of the low-temperature carbonization furnace. It has long-term operation in a high-temperature environment of 300°C to 1000°C. It will be deformed when heated. Due to the temperature difference, there are temperature differences and deformations. Its air tightness, Life, deformation, local stress, etc. greatly affect the performance and service life of the low-temperature carbonization furnace. In addition, the temperature uniformity and temperature difference of the stainless steel muffle have a huge impact on the quality and stability of the final carbon fiber. After discussion and analysis, it is judged that the main reason for the above shortcomings may be the structure, deformation, insufficient position and cross-sectional area of the stainless steel muffle of the low-temperature carbonization furnace, and the internal temperature uniformity. After nearly 40 years of development and research, although China's carbon fiber has produced products that are close to the foreign T300 level, the annual output and product performance of carbon fiber are far from meeting the needs of the domestic market. Compared with the international advanced technology level of carbon fiber products, the main problems of domestic carbon fiber are mainly reflected in the uniformity of carbon fiber and the poor stability of carbon fiber. The main reason is that in addition to the limitation of carbon fiber technology by foreign countries, another important factor is carbon fiber production. The main production equipment in the process lags behind foreign countries. The current situation is that foreign developed countries represented by the United States and Japan monopolize the production technology of high-performance carbon fiber equipment and attach great importance to preventing technology outflow. Compared with China’s development in the field of carbon fiber research and development, the pace of industrialization is slow. The current production of enterprises is based on imitation, and importing key equipment is the main method to solve the equipment problem, especially for production lines with larger production capacity, such as oxidation furnaces and carbonization furnaces for thousand-ton carbon fiber production lines. The United States prohibits exports to China. equipment. If the current passive situation is to be changed and industrial safety threats are eliminated, the independent development of localization and industrialization of carbon fiber production line equipment needs to be solved urgently, and continuous improvement and research by carbon fiber-related professional researchers are also needed. Therefore, it is necessary to choose a reasonable design method, which can make the furnace wall reach a surface temperature that meets the specifications, and reduce the unit energy consumption is a technical problem facing the current.
技术问题technical problem
综上所述，本发明的目的在于解决现有技术在低温碳化炉设计阶段存在的技术难题，而提出一种基于WORKBENCH低温碳化炉氧含量分布模拟方法。To sum up, the purpose of the present invention is to solve the technical problems existing in the design stage of the low-temperature carbonization furnace in the prior art, and to propose a method for simulating the oxygen content distribution of the low-temperature carbonization furnace based on WORKBENCH.
技术解决方案Technical solutions
为解决本发明所提出的技术问题，采用的技术方案为：In order to solve the technical problems proposed by the present invention, the technical solutions adopted are:
基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于所述方法包括有如下步骤：Based on the WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method, it is characterized in that the method includes the following steps:
S1、采用WORKBENCH软件中CAD软件Design Modeler模块建立低温碳化炉马弗腔体和进出口密封腔体的三维仿真模型，并对三维仿真模型的几何参数进行设定；S1. Use the CAD software Design Modeler module in the WORKBENCH software to establish a three-dimensional simulation model of the muffle cavity of the low-temperature carbonization furnace and the sealing cavity of the inlet and outlet, and set the geometric parameters of the three-dimensional simulation model;
S2、将步骤S1中建立的碳化炉马弗腔体和进出口密封腔体的三维仿真模型传递到网格划分Mesh模块中，在Mesh模块中采用Sweep方式对三维仿真模型进行网格划分；S2. Transfer the 3D simulation model of the muffle cavity of the carbonization furnace and the sealed cavity of the inlet and outlet established in step S1 to the Mesh module, and use the Sweep method to mesh the 3D simulation model in the Mesh module;
S3、将步骤S2中网格划分完成的三维仿真模型传递到WORKBENCH软件的CFX计算模块，并在CFX计算模块进行参数设置；S3. Transfer the three-dimensional simulation model completed in step S2 to the CFX calculation module of the WORKBENCH software, and set the parameters in the CFX calculation module;
S4、在WORKBENCH软件中的CFX计算模块里设置检测点和检测面，并进行仿真运算得到仿真结果，以此作为设计低温碳化炉马弗腔体结构和进出口密封结构的指标；S4. Set the detection points and detection surfaces in the CFX calculation module of the WORKBENCH software, and perform simulation calculations to obtain the simulation results, which are used as indicators for designing the muffle cavity structure and the import and export sealing structure of the low-temperature carbonization furnace;
S5、在相同的几何参数设置条件下，通过将三维仿真模型设置不同参数并重复步骤S1至步骤S4，以进行多次模拟计算，由室内检测点的温度变化曲线、检测面的温度云图、检测面的气流速度云图作为评价炉膛加热效果以及气流分布特性的指标，以此确定最优化的炉膛蓄热能力与气流分布设计。S5. Under the same geometric parameter setting conditions, by setting different parameters of the three-dimensional simulation model and repeating steps S1 to S4 to perform multiple simulation calculations, the temperature change curve of the indoor detection point, the temperature cloud map of the detection surface, and the detection The airflow velocity cloud diagram on the surface is used as an index to evaluate the furnace heating effect and airflow distribution characteristics, so as to determine the optimal furnace heat storage capacity and airflow distribution design.
作为对本发明作进一步限定的技术方案包括有：The technical solutions that further limit the present invention include:
步骤S1中设定的几何参数至少包括：马弗腔体几何形状、几何尺寸、进出口密封几何形状、几何尺寸、进出口密封氮气管进口尺寸、氮气管出口尺寸。The geometric parameters set in step S1 at least include: muffle cavity geometric shape, geometric size, inlet and outlet sealing geometric shape, geometric size, inlet and outlet sealed nitrogen pipe inlet size, and nitrogen pipe outlet size.
步骤（3）中，对在CFX计算模块进行参数设置的过程如下：In step (3), the process of parameter setting in the CFX calculation module is as follows:
（3.1）、在Expression选项导入根据工艺参数编制的自定义温度参数；(3.1) Import the custom temperature parameters compiled according to the process parameters in the Expression option;
（3.2）、在Buoyancy选项中，将y方向Gravity Y Dirn 根据要求设定为预设值，Analysis Type选项设置为Transient瞬态计算；(3.2) In the Buoyancy option, set the y direction Gravity Y Dirn to the default value according to the requirements, and set the Analysis Type option to Transient transient calculation;
（3.3）、将Fluid Models选项中的Heat Transfer设置为Thermal Energy，Turbulence选项中选取k-epsilon模型；(3.3), set Heat Transfer in the Fluid Models option to Thermal Select k-epsilon model in Energy and Turbulence options;
（3.4）、在Material Library选项部分选择空气和氮气；(3.4), select air and nitrogen in the Material Library option section;
（3.5）、在Fluid and particle Definitions选项中将Fluid1部分设为氮气，Fluid2部分设为氧气；(3.5), in Fluid and In the particle Definitions option, set the Fluid1 part to nitrogen and the Fluid2 part to oxygen;
（3.6）、在Boundary选项中设置入口边界条件为Static Pressure，并将Heat Transfer选项根据实际要求设置为预设值，设置出口边界条件为Average Static Pressure，将每个计算域设置为Interface进行数据交换，墙壁设置为对流换热面，使用Expression定义每小时内炉壁空气综合温度值，对流换热系数根据实际要求设置为预设值，其他壁面设置为绝热光滑壁面；(3.6). Set the inlet boundary condition as Static Pressure in the Boundary option, and set the Heat The Transfer option is set to a preset value according to actual requirements, and the exit boundary condition is set to Average Static Pressure, each calculation domain is set to Interface for data exchange, the wall is set as the convective heat transfer surface, the expression is used to define the hourly temperature of the air in the furnace wall, the convective heat transfer coefficient is set to the preset value according to actual requirements, and the other wall surfaces Set as adiabatic smooth wall;
（3.7）、选择Define Run后进行计算。(3.7). Calculate after selecting Define Run.
步骤S4中，选择马弗炉内三维仿真模型的中心点作为检测点，检测面为过中心点的X方向平面。In step S4, the center point of the three-dimensional simulation model in the muffle furnace is selected as the detection point, and the detection surface is an X-direction plane passing the center point.
步骤S4中，所述仿真结果包括：检测点的温度变化曲线，检测面的速度云图，检测面的温度云图。In step S4, the simulation result includes: the temperature change curve of the detection point, the velocity cloud image of the detection surface, and the temperature cloud image of the detection surface.
有益效果Beneficial effect
（1）关于低温碳化炉氧含量分布的问题，以往的方法通常都是单一的进行传感器测试，而本发明利用监测点的温度变化曲线以及检测面的温度云图、速度云图来判定炉膛的蓄热能力，可以更好的衡量结构设计。(1) Regarding the distribution of oxygen content in the low-temperature carbonization furnace, the previous methods usually use a single sensor test, while the present invention uses the temperature change curve of the monitoring point and the temperature cloud map and the speed cloud map of the detection surface to determine the heat storage in the furnace Ability to better measure structural design.
（2）通过数值模拟的方法，建立马弗炉模型、流体参数、不同氧气含量等因素与宏观性能的关系模型，从理论上预测氧含量、不同加热温区、不同流动速度对马弗炉内热环境的影响，从而可以降低设计成本。(2) Through the method of numerical simulation, establish the relationship model between the muffle furnace model, fluid parameters, different oxygen content and other factors and the macroscopic performance, and theoretically predict the influence of oxygen content, different heating temperature zones, and different flow speeds on the internal heat of the muffle furnace. Environmental impact, which can reduce design costs.
（3）本发明法能够得到不同时间段马弗炉内蓄热能力、不同流动速度与不同氧含量下的炉膛内温度、速度分布规律，从而为低温碳化炉中在设计时提供参考。(3) The method of the present invention can obtain the heat storage capacity in the muffle furnace at different time periods, the temperature and velocity distribution rules in the furnace under different flow speeds and different oxygen contents, so as to provide a reference for the design of low-temperature carbonization furnaces.
附图说明Description of the drawings
图1为本发明模拟方法中建立的三维模型示意图。Fig. 1 is a schematic diagram of a three-dimensional model established in the simulation method of the present invention.
图2是本发明不同氧气含量的监测面温度云图示意图。Figure 2 is a schematic diagram of the temperature cloud diagram of the monitoring surface of the present invention with different oxygen content.
图3是本发明不同氧气含量时检测面的氧含量云图示意图。Fig. 3 is a schematic diagram of the oxygen content cloud diagram of the detection surface of the present invention when the oxygen content is different.
本发明的最佳实施方式The best mode of the present invention
以下结合附图和本发明优选具体实施例对本发明的方法作进一步限说明。Hereinafter, the method of the present invention will be further limitedly described with reference to the accompanying drawings and preferred specific embodiments of the present invention.
本发明公开的基于WORKBENCH低温碳化炉氧含量分布模拟方法，包括有如下步骤：The oxygen content distribution simulation method based on WORKBENCH low-temperature carbonization furnace disclosed in the present invention includes the following steps:
S1、采用WORKBENCH软件中CAD软件Design Modeler模块建立低温碳化炉马弗腔体和进出口密封腔体的三维仿真模型，如图1中所示，并对三维仿真模型的几何参数进行设定；设定的几何参数至少包括：马弗腔体几何形状、几何尺寸、进出口密封几何形状、几何尺寸、进出口密封氮气管进口尺寸、氮气管出口尺寸。S1. Use the CAD software Design Modeler module in the WORKBENCH software to establish a three-dimensional simulation model of the muffle cavity of the low-temperature carbonization furnace and the sealed cavity of the inlet and outlet, as shown in Figure 1, and set the geometric parameters of the three-dimensional simulation model; The determined geometric parameters include at least: the geometry of the muffle cavity, the geometry, the geometry of the inlet and outlet seals, the geometry, the inlet size of the inlet and outlet sealed nitrogen pipes, and the outlet size of the nitrogen pipes.
S2、将步骤S1中建立的碳化炉马弗腔体和进出口密封腔体的三维仿真模型传递到网格划分Mesh模块中，在Mesh模块中采用Sweep方式对三维仿真模型进行网格划分。S2. Transfer the 3D simulation model of the muffle cavity of the carbonization furnace and the sealed cavity of the inlet and outlet established in step S1 to the Mesh module, and use the Sweep method to mesh the 3D simulation model in the Mesh module.
S3、将步骤S2中网格划分完成的三维仿真模型传递到WORKBENCH软件的CFX计算模块，并在CFX计算模块进行参数设置；对在CFX计算模块进行参数设置的过程具体如下：S3. Transfer the three-dimensional simulation model completed in step S2 to the CFX calculation module of the WORKBENCH software, and set the parameters in the CFX calculation module; the process of setting the parameters in the CFX calculation module is as follows:
（3.1）、在Expression选项导入根据工艺参数编制的自定义温度参数；(3.1) Import the custom temperature parameters compiled according to the process parameters in the Expression option;
（3.2）、在Buoyancy选项中，将y方向Gravity Y Dirn 根据要求设定为预设值，Analysis Type选项设置为Transient瞬态计算；(3.2) In the Buoyancy option, set the y direction Gravity Y Dirn to the default value according to the requirements, and set the Analysis Type option to Transient transient calculation;
（3.3）、将Fluid Models选项中的Heat Transfer设置为Thermal Energy，Turbulence选项中选取k-epsilon模型；(3.3), set Heat Transfer in the Fluid Models option to Thermal Select k-epsilon model in Energy and Turbulence options;
（3.4）、在Material Library选项部分选择空气和氮气；(3.4), select air and nitrogen in the Material Library option section;
（3.5）、在Fluid and particle Definitions选项中将Fluid1部分设为氮气，Fluid2部分设为氧气；(3.5), in Fluid and In the particle Definitions option, set the Fluid1 part to nitrogen and the Fluid2 part to oxygen;
（3.6）、在Boundary选项中设置入口边界条件为Static Pressure，并将Heat Transfer选项根据实际要求设置为预设值，设置出口边界条件为Average Static Pressure，将每个计算域设置为Interface进行数据交换，墙壁设置为对流换热面，使用Expression定义每小时内炉壁空气综合温度值，对流换热系数根据实际要求设置为预设值，其他壁面设置为绝热光滑壁面；(3.6). Set the inlet boundary condition as Static Pressure in the Boundary option, and set the Heat The Transfer option is set to a preset value according to actual requirements, and the exit boundary condition is set to Average Static Pressure, each calculation domain is set to Interface for data exchange, the wall is set as the convective heat transfer surface, the expression is used to define the hourly temperature of the air in the furnace wall, the convective heat transfer coefficient is set to the preset value according to actual requirements, and the other wall surfaces Set as adiabatic smooth wall;
（3.7）、选择Define Run后进行计算。(3.7). Calculate after selecting Define Run.
S4、在WORKBENCH软件中的CFX计算模块里设置检测点和检测面，并进行仿真运算得到仿真结果，以此作为设计低温碳化炉马弗腔体结构和进出口密封结构的指标；具体可以选择马弗炉内三维仿真模型的中心点作为检测点，检测面1为过中心点的X方向平面。所述仿真结果包括：检测点的温度变化曲线，检测面的速度云图，检测面的温度云图。S4. Set the detection points and detection surfaces in the CFX calculation module of the WORKBENCH software, and perform simulation calculations to obtain the simulation results, which can be used as indicators for designing the muffle cavity structure and the import and export sealing structure of the low-temperature carbonization furnace; The center point of the three-dimensional simulation model in the furnace is used as the detection point, and the detection surface 1 is the X-direction plane passing the center point. The simulation result includes: a temperature change curve of a detection point, a velocity cloud image of the detection surface, and a temperature cloud image of the detection surface.
S5、在相同的几何参数设置条件下，通过将三维仿真模型设置不同参数并重复步骤S1至步骤S4，以进行多次模拟计算，由炉膛内检测点的温度变化曲线、检测面的温度云图、检测面的气流速度云图作为评价炉膛加热效果以及气流分布特性的指标，以此确定最优化的炉膛蓄热能力与气流分布设计。S5. Under the same geometric parameter setting conditions, by setting different parameters of the three-dimensional simulation model and repeating steps S1 to S4 to perform multiple simulation calculations, the temperature change curve of the detection point in the furnace, the temperature cloud map of the detection surface, The air velocity cloud map on the detection surface is used as an index to evaluate the furnace heating effect and air distribution characteristics, so as to determine the optimal furnace heat storage capacity and air distribution design.
本发明通过Expression定义通风时间段，在Fluid Values选项中Boundary Conditions 里修改氧气含量，入口边界Static Pressure中修改气流压力大小可以得出不同氧气含量下密封腔压力与马弗炉内蓄热能力的变化规律。对比三种氧气含量，温度变化曲线趋势相同，但不同气流速度蓄热能力不同。综上，气流速度对温度变化具有延时作用，看出炉膛壁面气体具有良好的保温效果，其蓄热性能优越；从不同氧气含量检测面的温度云图示意图，如图2所示，显示出炉腔内温度分布均匀。从不同时间段检测面的氧含量云图示意图，如图4所示，显示马弗腔内存在氧气含量不均匀，氧含量浓度沿着炉腔进口处开始增加，说明该炉腔内的气流组织存在不合理的地方。为验证WORKBENCH的仿真结果，应多次模拟，比较分析实验结果，得出马弗炉腔气体分布与蓄热性能的最佳方案。The present invention defines the ventilation time period through Expression, in Fluid Modify the oxygen content in the Boundary Conditions in the Values option, and modify the airflow pressure in the static pressure of the inlet boundary to obtain the change law of the pressure in the sealed chamber and the heat storage capacity in the muffle furnace under different oxygen contents. Comparing the three kinds of oxygen content, the trend of the temperature change curve is the same, but the heat storage capacity of different air flow speeds is different. In summary, the airflow velocity has a delay effect on the temperature change. It can be seen that the gas on the furnace wall has a good heat preservation effect, and its heat storage performance is superior; from the temperature cloud diagram of the detection surface of different oxygen content, as shown in Figure 2, it shows the furnace cavity The internal temperature distribution is uniform. The schematic diagram of the oxygen content cloud diagram of the detection surface from different time periods, as shown in Figure 4, shows that the oxygen content in the muffle chamber is uneven, and the oxygen content concentration starts to increase along the furnace chamber entrance, indicating the existence of airflow organization in the furnace chamber Unreasonable place. In order to verify the simulation results of WORKBENCH, several simulations should be performed, and the experimental results should be compared and analyzed, and the best solution for the gas distribution and heat storage performance of the muffle furnace cavity should be obtained.
本发明通过对低温碳化炉设计过程中的热流场进行模拟，结构进行优化设计，在不降低现有隔热效果的前提下降低低温碳化炉的制造成本，可以降低实验成本，优化设计，为降低碳纤维生产能耗提供理论支持，也为相关的数值模拟研究提供依据，克服现有技术在低温碳化炉设计阶段的不足。The present invention simulates the heat flow field in the design process of the low-temperature carbonization furnace, optimizes the structure design, reduces the manufacturing cost of the low-temperature carbonization furnace without reducing the existing thermal insulation effect, can reduce the experimental cost, and optimize the design. It provides theoretical support for reducing the energy consumption of carbon fiber production, and also provides a basis for related numerical simulation research, and overcomes the shortcomings of the existing technology in the low-temperature carbonization furnace design stage.
本发明所述的实施例仅仅是对本发明的优选实施方式进行的描述，并非对本发明构思和范围进行限定，在不脱离本发明设计思想的前提下，本领域中工程技术人员对本发明的技术方案作出的各种变型和改进，均应落入本发明的保护范围，本发明请求保护的技术内容，已经全部记载在权利要求书中。The embodiments of the present invention are only a description of the preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, those skilled in the art have an understanding of the technical solutions of the present invention. Various modifications and improvements made should fall within the scope of protection of the present invention, and the technical content claimed by the present invention has all been recorded in the claims.

Claims (5)

  1. 基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于所述方法包括有如下步骤：Based on the WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method, it is characterized in that the method includes the following steps:
    S1、采用WORKBENCH软件中CAD软件Design Modeler模块建立低温碳化炉马弗腔体和进出口密封腔体的三维仿真模型，并对三维仿真模型的几何参数进行设定；S1, using CAD software Design in WORKBENCH software The Modeler module establishes a three-dimensional simulation model of the muffle cavity of the low-temperature carbonization furnace and the sealed cavity of the inlet and outlet, and sets the geometric parameters of the three-dimensional simulation model;
    S2、将步骤S1中建立的碳化炉马弗腔体和进出口密封腔体的三维仿真模型传递到网格划分Mesh模块中，在Mesh模块中采用Sweep方式对三维仿真模型进行网格划分；S2. Transfer the 3D simulation model of the muffle cavity of the carbonization furnace and the sealed cavity of the inlet and outlet established in step S1 to the Mesh module, and use the Sweep method to mesh the 3D simulation model in the Mesh module;
    S3、将步骤S2中网格划分完成的三维仿真模型传递到WORKBENCH软件的CFX计算模块，并在CFX计算模块进行参数设置；S3. Transfer the three-dimensional simulation model completed in step S2 to the CFX calculation module of the WORKBENCH software, and set the parameters in the CFX calculation module;
    S4、在WORKBENCH软件中的CFX计算模块里设置检测点和检测面，并进行仿真运算得到仿真结果，以此作为设计低温碳化炉马弗腔体结构和进出口密封结构的指标；S4. Set the detection points and detection surfaces in the CFX calculation module of the WORKBENCH software, and perform simulation calculations to obtain the simulation results, which are used as indicators for designing the muffle cavity structure and the import and export sealing structure of the low-temperature carbonization furnace;
    S5、在相同的几何参数设置条件下，通过将三维仿真模型设置不同参数并重复步骤S1至步骤S4，以进行多次模拟计算，由室内检测点的温度变化曲线、检测面的温度云图、检测面的气流速度云图作为评价炉膛加热效果以及气流分布特性的指标，以此确定最优化的炉膛蓄热能力与气流分布设计。S5. Under the same geometric parameter setting conditions, by setting different parameters of the three-dimensional simulation model and repeating steps S1 to S4 to perform multiple simulation calculations, the temperature change curve of the indoor detection point, the temperature cloud map of the detection surface, and the detection The airflow velocity cloud diagram on the surface is used as an index to evaluate the furnace heating effect and airflow distribution characteristics, so as to determine the optimal furnace heat storage capacity and airflow distribution design.
  2. 根据权利要求1所述的基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于：步骤S1中设定的几何参数至少包括：马弗腔体几何形状、几何尺寸、进出口密封几何形状、几何尺寸、进出口密封氮气管进口尺寸、氮气管出口尺寸。The WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method according to claim 1, characterized in that the geometric parameters set in step S1 at least include: muffle cavity geometry, geometry, inlet and outlet sealing geometry, geometry Dimensions, inlet and outlet sealed nitrogen pipe inlet size, nitrogen pipe outlet size.
  3. 根据权利要求1所述的基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于：步骤（3）中，对在CFX计算模块进行参数设置的过程如下：The WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method according to claim 1, characterized in that: in step (3), the process of parameter setting in the CFX calculation module is as follows:
    （3.1）、在Expression选项导入根据工艺参数编制的自定义温度参数；(3.1) Import the custom temperature parameters compiled according to the process parameters in the Expression option;
    （3.2）、在Buoyancy选项中，将y方向Gravity Y Dirn 根据要求设定为预设值，Analysis Type选项设置为Transient瞬态计算；(3.2) In the Buoyancy option, set the y direction Gravity Y Dirn to the default value according to the requirements, and set the Analysis Type option to Transient transient calculation;
    （3.3）、将Fluid Models选项中的Heat Transfer设置为Thermal Energy，Turbulence选项中选取k-epsilon模型；(3.3). Set Heat Transfer in the Fluid Models option to Thermal Energy, and select the k-epsilon model in the Turbulence option;
    （3.4）、在Material Library选项部分选择空气和氮气；(3.4), select air and nitrogen in the Material Library option section;
    （3.5）、在Fluid and particle Definitions选项中将Fluid1部分设为氮气，Fluid2部分设为氧气；(3.5) In the Fluid and particle Definitions option, set the Fluid1 part to nitrogen and the Fluid2 part to oxygen;
    （3.6）、在Boundary选项中设置入口边界条件为Static Pressure，并将Heat Transfer选项根据实际要求设置为预设值，设置出口边界条件为Average Static Pressure，将每个计算域设置为Interface进行数据交换，墙壁设置为对流换热面，使用Expression定义每小时内炉壁空气综合温度值，对流换热系数根据实际要求设置为预设值，其他壁面设置为绝热光滑壁面；(3.6). Set the inlet boundary condition as Static Pressure in the Boundary option, and set the Heat Transfer option to the preset value according to actual requirements, and set the outlet boundary condition as Average Static Pressure, each calculation domain is set to Interface for data exchange, the wall is set as the convective heat transfer surface, and Expression is used to define the comprehensive temperature value of the inner furnace wall air per hour. The convective heat transfer coefficient is set to the preset value according to actual requirements. Others The wall surface is set as an adiabatic smooth wall surface;
    （3.7）、选择Define Run后进行计算。(3.7). Calculate after selecting Define Run.
  4. 根据权利要求1所述的基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于：步骤S4中，选择马弗炉内三维仿真模型的中心点作为检测点，检测面为过中心点的X方向平面。The oxygen content distribution simulation method based on WORKBENCH low-temperature carbonization furnace according to claim 1, characterized in that: in step S4, the center point of the three-dimensional simulation model in the muffle furnace is selected as the detection point, and the detection surface is the X direction passing the center point flat.
  5. 根据权利要求1所述的基于WORKBENCH低温碳化炉氧含量分布模拟方法，其特征在于：步骤S4中，所述仿真结果包括：检测点的温度变化曲线，检测面的速度云图，检测面的温度云图。The WORKBENCH low-temperature carbonization furnace oxygen content distribution simulation method according to claim 1, characterized in that: in step S4, the simulation result includes: a temperature change curve of a detection point, a velocity cloud image of a detection surface, and a temperature cloud image of the detection surface .
PCT/CN2020/084816 2020-04-15 2020-04-15 Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method WO2021207953A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/084816 WO2021207953A1 (en) 2020-04-15 2020-04-15 Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/084816 WO2021207953A1 (en) 2020-04-15 2020-04-15 Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method

Publications (1)

Publication Number Publication Date
WO2021207953A1 true WO2021207953A1 (en) 2021-10-21

Family

ID=78084468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/084816 WO2021207953A1 (en) 2020-04-15 2020-04-15 Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method

Country Status (1)

Country Link
WO (1) WO2021207953A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114117675A (en) * 2021-11-26 2022-03-01 西安西电高压开关操动机构有限责任公司 Temperature and humidity field numerical simulation method and system for operating mechanism
CN114239171A (en) * 2021-12-15 2022-03-25 西安西热锅炉环保工程有限公司 Nozzle arrangement mode design method for urea direct injection pyrolysis technology of gas turbine transition flue
CN116629028A (en) * 2023-07-19 2023-08-22 东方空间技术(山东)有限公司 Method and device for determining parameters of flow guide groove of petal-shaped launching pad

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103629371A (en) * 2013-12-06 2014-03-12 上海一核阀门制造有限公司 Cavitation-resistant rotary regulating valve
CN104217061A (en) * 2014-07-08 2014-12-17 国家电网公司 Temperature field simulation design method for low-voltage distribution cabinet
CN109783978A (en) * 2019-02-11 2019-05-21 南京航空航天大学 A kind of micro flapping wing air vehicle aerodynamic numerical emulation mode based on ANSYS Workbench
EP3250535B1 (en) * 2015-01-27 2020-01-08 Knauf Insulation Process for the preparation of high alumina cement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103629371A (en) * 2013-12-06 2014-03-12 上海一核阀门制造有限公司 Cavitation-resistant rotary regulating valve
CN104217061A (en) * 2014-07-08 2014-12-17 国家电网公司 Temperature field simulation design method for low-voltage distribution cabinet
EP3250535B1 (en) * 2015-01-27 2020-01-08 Knauf Insulation Process for the preparation of high alumina cement
CN109783978A (en) * 2019-02-11 2019-05-21 南京航空航天大学 A kind of micro flapping wing air vehicle aerodynamic numerical emulation mode based on ANSYS Workbench

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HAN XIAOJUAN: "Study on the Thermodynamic Properties of the Gas Turbine System Basing on Ultra-low Density Gas Combustion as Auxiliary Fuel", MASTER THESIS, TRAINING UNIT SCHOOL OF ELECTRIC POWER ENGINEERING CHINIA, CN, 15 March 2017 (2017-03-15), CN, XP055864037 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114117675A (en) * 2021-11-26 2022-03-01 西安西电高压开关操动机构有限责任公司 Temperature and humidity field numerical simulation method and system for operating mechanism
CN114117675B (en) * 2021-11-26 2023-08-22 西安西电高压开关操动机构有限责任公司 Numerical simulation method and system for temperature and humidity field of operating mechanism
CN114239171A (en) * 2021-12-15 2022-03-25 西安西热锅炉环保工程有限公司 Nozzle arrangement mode design method for urea direct injection pyrolysis technology of gas turbine transition flue
CN116629028A (en) * 2023-07-19 2023-08-22 东方空间技术(山东)有限公司 Method and device for determining parameters of flow guide groove of petal-shaped launching pad
CN116629028B (en) * 2023-07-19 2023-09-22 东方空间技术(山东)有限公司 Method and device for determining parameters of flow guide groove of petal-shaped launching pad

Similar Documents

Publication Publication Date Title
CN111400934B (en) Method for simulating oxygen content distribution of low-temperature carbonization furnace based on WORKBENCH
CN111400958B (en) ANSYS-based simulation method for oxygen content distribution of high-temperature carbonization furnace
WO2021207953A1 (en) Workbench-based low-temperature carbonization furnace oxygen content distribution simulation method
CN111680432B (en) Low-temperature carbonization furnace multi-coupling field stress distribution simulation method based on WORKBENCH
CN111651908B (en) ANSYS-based multi-field coupling stress distribution simulation method for high-temperature carbonization furnace
WO2022099713A1 (en) Three-dimensional simulation method for tow heating process in low temperature carbonization furnace based on overset model
CN109858135B (en) Calculation method for safety check of long blade in low-pressure through-flow area of steam turbine
CN112446177B (en) Simulation method for heat insulation performance of external heat insulation material of high-temperature carbonization furnace
WO2021207952A1 (en) High-temperature carbonization furnace oxygen content distribution simulation method based on ansys
WO2022011723A1 (en) Ansys-based multi-field coupling stress distribution simulation method for high temperature carbonization furnace
CN112528572B (en) Low-temperature carbonization furnace tow heating process three-dimensional simulation method based on OVERSET model
CN110489835B (en) Natural ventilation and wall heat storage coupling simulation method based on Ansys software
CN101319256A (en) Intelligent monitoring method for cooling wall of blast furnace
CN108844589A (en) A kind of boiler air preheater air leakage rate calculation method
CN109829189B (en) Hearth slagging thickness judgment method based on numerical simulation
CN104360984B (en) One kind is based on the lower cooling tower filler performance calculation method of Two point boundary value measurement
CN107023966A (en) A kind of subway station air conditioning cooling water water outlet temperature setting value optimization method
CN112270109B (en) Method for simulating heating performance of graphite rod in high-temperature carbonization furnace
CN104748995B (en) The simulation testing device of system reliability control characteristic is utilized for smoke discharging residual heat
CN108090293A (en) A kind of blast furnace hearth and bottom corrodes enveloping surface and determines method
WO2022099712A1 (en) Simulation method for heating performance of graphite rod in high-temperature carbonization furnace
WO2022011724A1 (en) Workbench-based method for simulating multi-coupling field stress distribution of low-temperature carbonization furnace
WO2022099716A1 (en) Method for simulating thermal insulation property of external thermal insulation material of high-temperature carbonization furnace
CN112435716B (en) Visual simulation method for dynamic distribution characteristics of oxygen concentration in high-temperature carbonization furnace
CN114048697B (en) Airplane test airflow organization design method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20931159

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20931159

Country of ref document: EP

Kind code of ref document: A1