Development Of A Dynamic Simulation System For Isomerization Process Of 80 Ktons/a

With the rapid development of national industrial science and technology and the proposal of "dual-carbon policy",environmental protection standards are becoming stricter and higher requirements are put forward for the production of clean fuels.The National VI standard for motor fuel oil sets new requirements for the content of benzene,olefins and aromatics while keeping the octane number unchanged.Among the three common used blending components of alkylate,isomerized oils and MTBE,isomerized oils stand out because of their superior performance,and the isomerization process has become an important part of gasoline processing in countries and regions with strict environmental protection index requirements.For the simulation of isomerization process,steady-state simulation system is commonly used,but when external disturbances occur,how to overcome the influence of external disturbances on the operating results of isomerization process has been a problem that chemical companies need to solve,and it is also a study of dynamic simulation scope.This article takes the 80 ktons/a isomerization unit in Yumen Oilfield as an object to develop a dynamic simulation system,which plays a positive role in guiding the actual production of the production unit and the assessment and training of operators.Firstly,according to the PID and PFD of the 80 ktons/a isomerization unit in Yumen Oilfield,the paper marks the Mark diagram,determines the position distribution of the start-up line,main process technology,and instruments,and draws up the scope and degree of simulation.Then,on the basis of the real-time production data and instrument information provided by the factory,based on an in-depth understanding of the process flow,material balance and energy balance calculations are performed on different equipment,and a pipe network model is built and solved.Based on this,the dynamic models of equipment units such as distillation towers,multiphase storage tanks,pumps,compressors,heating furnaces,and reactors in the process flow was built;for the overall process built,the imitation DCS screen and field diagram screen were drawn,and the standard screen configuration,trend group and control group screen configuration were also carried out.According to the actual production information,check the PID parameters of the instrument control;for the requirements of simulation training and training assessment,the configuration of the scoring system was completed.Finally,the internal and on-site tests of the dynamic simulation software are carried out;aiming at the process production behavior of the production equipment under different working conditions,the simulation effect of the established dynamic simulation software is analyzed.The dynamic simulation software system for C5/C6 isomerization device was developed with the help of East Simulation PSSP platform.The dynamic simulation results show that the developed software system operates stably,the simulation results are accurate,and the key indicators and the dynamic change trends of the simulated working conditions are consistent with the actual operation information.After testing and acceptance by on-site production operators,the C5/C6 isomerization dynamic simulation system meets the software design requirements and is fully capable of studying the dynamic behavior of process equipment.