Research On Development And Application Of Advanced Control System For Catalytic

The main raw material for catalytic reforming is naphtha.The main products are high-octane gasoline,benzene,toluene,xylene and other basic organic chemical-raw materials.As an important secondary processing device,the catalytic reformer has certain requirements for the hydrogen environment and the oxygen environment.In actual industrial control,the safety and stability of the device have always been the primary goals of control,followed by improving the product Yield.The emergence of modern control theory has promoted the development of industry,but it also brings problems,as follows:1.The internal structure of some controlled objects is relatively complicated,and it is difficult to describe their status using existing theoretical knowledge.Even if it can be described,it is not accurate,and some performance indicators and control effects are difficult to meet the expected requirements.2.There may be many unexpected conditions during the actual operation of the system,which causes a certain parameter to change during the production process,thereby reducing the control quality.Under the premise of ensuring the smooth operation of production equipment,improving product yield and reducing energy consumption are also the primary tasks of advanced control.According to the actual industrial process and on-site process requirements,the advanced control and optimization system of the continuous reformer is studied.First,this paper uses a mechanism modeling approach to model the reforming reactor.Then,design and build the catalytic reforming controller according to the established control strategy.Secondly,in view of the constraint optimization problem that occurs in the actual application process,this paper proposes a control method that introduces input and output constraints into the design of a single-valued predictive controller and uses LMI to solve.Using linear matrix inequality(LMI)can be a complex process The constraints are converted into the form of linear matrix inequalities and solved using optimization algorithms,and finally the feasibility of the proposed method is confirmed.Finally,for the reforming aromatics project of a petrochemical company,using PACROS,Matlab and Excel and other software,a complete set of advanced control system for catalytic reformer was designed,data communication,data extraction,controller modeling,soft measurement,trend interface,report Interface development,a system based on the implementation of a single-valued estimation control algorithm solved by LMI and the setting of user rights,and actually put into operation,reducing the workload of the operator and the loss of raw materials.