A certain refinery polymer production intelligent control system case
Category:
Cooperation Case
Typical Case
Zhejiang Bangye Technology Co., Ltd. successfully applied advanced process control technology based on process calculation to Zhenhai refining and chemical polypropylene plant, and achieved very significant results. After the Zhenhai Refining and Chemical Propylene Control Project was put into operation, the control effect is shown in the following figure: Figure 3 is the comparison of the effect of the hydrogen concentration in the ring of Zhenhai Refining and Chemical Plant before and after the application. The standard deviation after the application decreased by 62% and 66 respectively. %.
Figure 3 Comparison of the effect of the hydrogen concentration of the loop before and after the application
Figure 4 shows the comparison between the gas-phase hydrogen-to-ethylene ratio of Zhenhai refining and polypropylene and the gas pressure before and after the application. The standard deviation after the application decreased by 88% and 82%, respectively.
Figure 4 Comparison of gas-phase hydrogen-to-ethylene ratio (top) and gas phase pressure (bottom) before and after application
Figure 5 is a comparison of CPK effects before and after the melt index of three grades of Zhenhai Refining & Chemical. The CPK (Complex Process Capability Index, CPK<1 is required for improvement, 1≦CPK<1.33 is standard, 1.33≦CPK) A large increase in goodness, the increase in CPK represents a decrease in the fluctuation of the melt index, while the average value of the melt index is closer to the target value of the product.
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