An Intelligent Tray Efficiency Estimation Method for the Fractionation System of Industrial Hydrocracking Processes

Abstract

An engineering-oriented tray efficiency estimation method for the hydrocracking fractionation system is proposed. As key parameter of the fractionation system, estimation of the tray efficiency is important and challenging due to the large computational burden given by the complexity of the fractionation system. Here, the high-dimensional tray efficiencies are screened first and divided into groups according to the spatial position. Then, an improved artificial bee colony algorithm is proposed to estimate the tray efficiencies of each group, in which two taboo lists are introduced to avoid repetitive search. The proposed method is validated using real industry data. The results demonstrate that the proposed approach is efficient in terms of estimation accuracy.

Optimization of Runner Balance for a Family Product of Injection Molding Process

“…M Zhai et al, [5] analyzed a balanced flow through modification of size, runner volume, and part quality in terms of warpage, the results show runner volume and injection pressure can reduce production costs of plastic products. Wang and Sun [6] analyzed the runner imbalance in the top cover cavity and brought the product box with the Moldflow Insight 5.0 analysis, the results showed that through optimization, the imbalance of plastic fluid flow in the cavity decreased from 28.6% to 0.7%, the pressure imbalance rate injection can be decreased from 42.0% to 4.2%, and the pressure distribution in the cavity is more uniform throughout the injection-process. Raz et al, [7] modified the runner angle and balanced the injection of plastic material in the three products, the results showed that the 90º angle configuration for the runner was proven to be able to uniform the filling time of the plastic material to the three products.…”