The methods of modeLLing a distiLLation column by mechanism and statistics are discussed in this paper. First, the Wang-Henke Method (Tridia9onat matrix algorithm ) is applied to caLcuLate the temprature and hydrogensuLphide density distribu- tion of the CoupLed DistiLLation CoLumns in Aroma- tic CompLex of Nanjin9 Yangzi Petrochemical Compa- ny, and muLtivariabte nonlinear re9ression models for some key variables are deduced from the steady -state process data. Then, several methods of optimization are studied. Taking minimizin9 ener9y consumption as the objective function,the optimizing caLcuLation and its simulation for steady- state models are made out. The simulation results of the opration optimizing show that the energy consumption can be reduced at Least by 5.0% ,if the columns are opra- ted with the optimal parameters. In addition, the inferential control theory is briefly introduced and its algorithm is developed and applied to the coupled distiLLation columns. The simulation of this application is aLso studied in this paper. FinaLLy, one convenient and fLexibLe software package is programmed, which contains modeLLing, optimizin9 and advanced control algorithm of the CoupLed DistiLLation CoLumns.
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