General Dynamic Simulation And Research Of Distillation Column

At present,the previous scholars have been studied very mature in the distillation column steady state simulation.The dynamic simulation of the distillation column is often used in the equilibrium level model,the non-equilibrium level model and the mixed pool model.The equilibrium model has the advantages of simple modeling and easy solution,but the basic assumptions of the theoretical level are not consistent with the actual results.Non-equilibrium model and mixed pool model calculation is more accurate,but the calculation is difficult,the parameters are notgood to retrieve.On the other hand,the previous model is the wholedistillation column as a modeling object to consider,occasionally distillation tray model,also studied thoroughly.Based on the equilibrium model,the distillation column model is established,and the distillation column is connected into the whole tower model.In this paper,by studying the equilibrium model in the dynamicmodel of the distillation column,the mechanism of material balance,energy balance and phase equilibrium is realized.For the momentum balance,the mechanism of the rising gas volume and the overflow of the tower is solved.Mode,reducing the amount of object calculation.In the process of component physical calculation and model solving,a general and fast method is used to reduce the computational complexity of the algorithm and meet the requirements of dynamic simulation.The obtained distillation tray model is connected to the distillation column model according to certain rules,and is suitable for the purpose of general purpose,pressure reducing and pressurized distillation column.The results were used to simulate the butyraldehyde isomer towers in the butanolyl alcohol plant,the butanol pre-distillation column,the butanol distillation column,the butanol isomer column,the octanol pre-distillation column and the octanol distillation column The After the simulation,the temperature distribution,pressure distribution and separation effect of the distillation column,the ascending gas volume and the overflow liquid volume of each plate are in good agreement with the actual value.After changing the feed volume and feed composition,it can also respond quickly to form a stable or unstable state to achieve the desired results.