Design And Early Warning Methods Of RPB Based On Double Electromagnetic Clutch And Ultrasonic Cleaning

Rotating packed bed(RPB)as an important equipment in China which has the advantage of energy conservation and emissions reduction,has the function of strengthening micromixing and mass transfer.Fluid in RPB centrifugal field can be cutted by the wire mesh packing inside high speed rotating rotor.In this way,high dispersion,strong mixing and high turbulence are realized,and RPB has become a typical representative of process hardening equipment.However,due to the fact that insolubles adhered to the rotor packing are continuously produced,rotor mass unbalance is often caused.What's more,vibration and damage of bearing in the rotating packed bed is often caused.As a result,it's forced to stop for part replacement and rotor cleaning,thus failing to realize long-term stable operation of RPB.In order to clean the adherent insolubles in RPB and realize the long-term stable operation of the rotating-packed bed,the following research methods are proposed in this paper:Firstly,by studying the structure and working principle of RPB,the design method of RPB is proposed,and the software platform of RPB design system is constructed;Secondly,by simulating the RPM,the parameter sensitivity of rotor adherent insolubles is studied,and an early warning model of rotor running state based on reaction parameters is concluded;Furthermore,the structure and control strategy of double electromagnetic clutch RPB based on ultrasonic cleaning are designed.The main research contents are as follows:(1)The structure and working principle of RPB are studied,and the design method of RPB is proposed,including:Gas-liquid inlet and outlet pipe design method,spray pipe design method,packing design method,packing selection method,rotor design method,motor selection method,rotating shaft design and check method,shell design and check method,seal selection method and overall design method.Then,based on the above design methods,the software platform of RPB design system is constructed.In addition,based on the technological process of preparing nanometer magnesium carbonate,combined with the design method and software platform of RPB design system proposed in this paper,the structure of RPB is designed and the assembly drawing of the structure is drawn.(2)A fluid physical model is built to describe the structure of RPB in the process of preparing nanometer magnesium carbonate.Then,numerical simulation is carried out to analyze the characteristic parameters that can represent the running state of rotors in RPB.Next,with porosity as a single factor variable,the parameter sensitivity of characteristic parameters to rotor adherent insolubles is simulated.In addition,based on the simulation results of parameter sensitivity,the coupling relationship between characteristic parameters and porosity is established,and an early warning model of rotor running state based on reaction parameters is concluded.(3)Based on the mechanical system,process control system,ultrasonic cleaning system,RPB design structure and early warning model of rotor running state based on reaction parameters,the structure and control strategy of double electromagnetic clutch RPB based on ultrasonic cleaning are designed.From the perspective of design,the design method of RPB and constructs software platform of RPB design system is proposed;Through the analysis of the numerical simulation results,an early warning model of rotor running state based on reaction parameters is proposed;And Based on the above research methods,the structure and control strategy of double electromagnetic clutch RPB based on ultrasonic cleaning is proposed.Through the above methods,the adherent insolubles problem of RPB is solved from the source,which ensures the long-term stable operation of RPB.