Research On High-Efficiency Manufacturing Technology And Equipment For Accurate Control Of Thermal-mechanical Coupling Of Materials

As a common fine chemical product,adhesives have been widely used in various industries,usually using synthetic preparation processes.However,for some special adhesive materials with special functional requirements,it is not easy to control the purity and molecular weight of the reaction product by directly using the synthetic preparation process,and the process is relatively special.In the preparation process,the material needs to be synthesized first.When the molecular weight of the material reaches the specified value,a catalyst is added to carry out a catalytic cracking reaction.After the reaction is completed,a post-processing operation is performed,and the target product is finally obtained.The adhesive preparation process can be divided into two reaction processes:synthesis and cracking.It has the characteristics of multiple operation procedures,multiple feeding times,long reaction time,large changes in material properties,and multiple detection and control parameters and high control accuracy requirements.New requirements are put forward for the optimization of reactor system,integrated equipment design,and process control.Therefore,it is necessary to carry out research on materials and equipment for precise control and thermal coupling of high-efficiency preparation technology.The main research contents include:(1)Research on the suitability of propeller type based on the calculation of thermo-mechanical coupling action flow fieldAiming at the characteristics of the material viscosity changing from"low-high-low" during the synthesis-cracking reaction,the flow field model of the thermodynamic coupling effect of the reactor was constructed to calculate the flow field under the conditions of low viscosity and high viscosity.Analyze the applicability of the calculation model and determine the calculation method.A comprehensive analysis of the applicable effects of paddle,turbine,and anchor frame stirring paddles in the range of viscosity changes involved in the reaction process is carried out.Three types of paddles were used to conduct stirring experiments on low-viscosity and high-viscosity guar gum solutions to analyze the stirring effect.It is found that the anchor frame type stirring blade has better applicability in the reaction process,and the flow field calculation under the thermo-mechanical coupling effect is performed on it,and the optimized design of the blade shape is finally completed.(2)Research on system optimization and integration of synthetic cracking reaction device.According to the process requirements of the reaction device,the integrated reaction system is divided into:reaction kettle,6 reaction units for feeding,discharging,heating,washing,condensation,and buffering,and pipeline subsystems.According to the process input conditions,the influence of structural parameters and process parameters on the material and flow balance of the reaction unit is studied,the material and flow balance relationship of the reaction unit is established,and the structure of each reaction unit is optimized.Analyze the measurement and control parameters of the reaction unit,carry out the integrated optimization design of the reaction device,and realize the installation and commissioning.(3)Reflect the integrated design of each control system.In response to the precise control requirements of the process parameters and material properties in the reaction system,the system equipment measurement and control point distribution is optimized,and the control mode and PLC control logic relationship are designed according to the measurement and control parameter types.The control circuit of the measurement and control system is designed,and the on-site and remote dual-end control mode is adopted.Realize the control of the process parameters of the reaction system.