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Research on the Application of Top Pressure Control Systemin Deethane Distillation Process Distillation Tower
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ZHANG Hao¹,SHENG Ruji²,CAO Yubo¹*
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1.School of Information and Control Engineering,Jilin University of Chemical Technology,Jilin City 132022,China;
2.Engineering Department,China Petroleum Engineering Construction Co.,LTD,Beijing 100010,China
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Abstract
Deethane distillation is an important process in ethylene production,and controlling the top pressureof the tower to maintain stability is a key link in the safe and stable production of deethane.In response to theproblem of difficult convergence of pressure in the de ethane distillation tower of a certain enterprise under loaddisturbance,a tower top pressure flow cascade automatic control system was designed based on S7-300PLC.Inorder to avoid sharp changes in the output of the differential term caused by changes in the set value,controlledvariable differentiation was used instead of deviation differentiation in the differential algorithm of the subcontroller.The system achieved good control effect in the simulation results,This provides a certain referenceand inspiration for the transformation and upgrading of actual production process control systems.
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Published: 25 July 2023
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