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传统的甲苯二胺分离工艺存在一些缺点,如甲苯二胺产品的纯度不高、过程的能耗大等。在通用化工模拟软件中对多塔连续精馏流程进行模拟分析,并结合生产实际提出过程的约束条件,以能耗最小为目标对分离过程进行优化,得到各塔的最优操作条件。在此基础上,对过程中的换热网络进行综合,得到热集成流程。该热集成流程在最优条件下操作时,产品的纯度满足生产要求,而且能耗比原流程减少约30％。
The traditional toluene diamine separation process has some shortcomings, such as toluenediamine product purity is not high, the process of energy consumption and so on. In the general chemical simulation software, the multi-tower continuous distillation process is simulated and analyzed, and the actual production process constraints are combined to optimize the separation process with minimum energy consumption, and the optimal operating conditions of each tower are obtained. On this basis, the heat exchange network in the process of synthesis, thermal integration process. The thermal integration process operates under optimal conditions, product purity to meet production requirements, and energy consumption than the original process to reduce about 30%.