Butadiene Extraction Distillation Process Simulation Optimization And Energy Saving

Extractive distillation is the dominating technology to produce1,3-butadiene. Nowadays, with the energy problem being increasingly severe, the parameter optimization of the extractive distillation columns is closely concerned and at the same time the level of energy consumption of the system greatly affect the profits of the whole distillation device. By analyzing the characteristics of the extractive distillation tower and the practical production process of1,3-butadiene,the article established a mathematical model of the process of industrial extractive distillation based on the mechanism of distillation as well as the factual data in practical production. This model can describe the operating features of the butadiene industry device well. On the premise of guaranteeing the quality of products, we can optimize and improve the model parameters then further optimize the operation of butadiene extractive distillation device for the aim of realizing energy conservation and emissions reduction. The main parameters that affect the butadiene extractive distillation process are solvent ratio, reflux ratio, temperature of column kettle and feed from compressor. By adjusting the parameters above and observing the energy change of extractive distillation column under the different operating conditions, we reach the target of3.6%energy saving. Furthermore, considering the change of C4components concentration, we summarize75set of feed composition. By using Aspen Plus, we can calculate best solvent ratio of each feed condition. Based on the75optimal solvent ratio data, we establish a4-input neural network model, which is more accurate than the former3-input neural network model. This model can provide the reference for actual operation in the future.