关键词: 顺丁橡胶, 溶剂及丁二烯回收装置, 己烷溶剂, 模拟, 节能

Abstract: The recovery unit for solvent and 1,3-butadiene is an important part of the nickel butadiene rubber production process and the energy consumption accounts for about 40% of that for the entire process. Therefore,it is the key process for improving the energy performance of the butadiene rubber production process. Raffinate oil was used as reaction solvent in a certain petrochemical enterprise with a six- column process as the recycling process before,and then the solvent was replaced by hexane solvent in order to save energy. The process was modified,such as reducing the reflux ratio of de-heavy oil column and collecting some bottom product of the recovered oil dehydration column directly. The solvent oil in the recovery unit of the considered petrochemical enterprise is replaced from raffinate oil to solvent hexane oil,and the corresponding technical retrofits have also been made. On the basis of the actual industrial data,the simulation models for this process before and after the retrofits are established via Aspen Hysys,and the results are compared with the actual data to prove the veracity. In the case of product quality in line with the production targets,comparing the separation performance and energy consumption,the results indicate that the energy consumption of the process is reduced by 15.25% after the retrofits,which shows a very significant energy-saving effect,and the reductions of energy consumption in the recovered oil dehydration column and de-heavy oil column are most obvious.

Key words: butadiene rubber, recovery unit for solvent and 1,3-butadiene, solvent hexane oil, process simulation, energy conservation