C9+重芳烃中高附加值产品分离流程模拟与热集成优化OA

Objective Flexible regulation of high-value product yields and reduction of energy consumption are targeted to be achieved in the separation process of reformed C9+heavy aromatic hydrocarbons through process optimization.Method Based on the comparative analysis of conventional four-tower separation and three-tower separation processes,the optimal process was determined,followed by optimization of key operational parameters and thermal integration design.Result The four-tower separation multiple component process was completed based on adding solvent separation tower in three-tower separation single component process.And the aromatic solvents SA-1000 and SA-1500 was producted simultaneously with all prodcution qaulity indexes meeting the requirements and achieving the flexible adjustment recovery of SA-1000 in the range of 17.8%−47.8%.The best operation conditions of solvent separation based on flexibility analysis were as follows:tower top pressure of 50 kPa;total tower tray number of 41;feed position was the 19th tray;and minimum reflux ratio of 3.62.Through thermal integration optimization between the heavy component removal tower and the solvent separation tower,the total heat consumption was reduced by 11.79%.Conclusion The optimized four-tower multi-component separation process was verified to enable high-efficiency,low-energy consumption separation of C9+heavy aromatics,providing a practical reference for industrial applications aimed at producing high-value-added products.