| In recent decades, advanced process control has been applied in the petroleum and chemical industry. Advanced control and optimization technology make chemical process with a complex control system more stable and precise, which bring about significant economic benefits for enterprises. Advanced control technology on the basis of Honeywell’s robust multivariable predictive control technology (RMPCT) is utilized to optimize the control system of a300,000tons gas separation plants. The corresponding advanced control systems for depropanizer, propylene tower and de-isobutylene tower are designed and put into use.In this work, normal operation scheme of each tower, the circuit state of control systems and the entire process target were analyzed respectively, which provided support for the control strategy of advanced process control. Moreover, based on robust multivariable predictive control technology and the status quo of300,000tons of gas separation unit, the overall advanced control system program was designed. Furthermore, the hardware and software platform of advanced control systems for the gas separation plant were introduced. Design method of advanced controller was illustrated by the one of the propylene tower. Finally, results of the implementation of the advanced control system were studied.After implementation of the advanced control system, the operation of the device becomes more stable and automatic. In addition, the advanced control system improves product quality and yield and reduces energy consumption. Overall, advanced control will bring considerable economic benefits for the enterprise. |
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