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对以环氧乙烷和正丁醇为原料,通过催化精馏法合成乙二醇单丁醚的催化精馏塔开车过程的动态行为进行了模拟研究。提出了1项适用于本工艺体系特点的开车策略。建立了催化精馏塔开车过程的动态数学模型,通过模拟计算得到了从开车至达到系统稳定需要的时间,研究和分析了开车过程中塔内温度、组分浓度、热负荷、反应速率及汽液相流量等的动态分布特征,并同试验结果进行了比较。研究揭示了催化精馏塔开车过程的基本规律,为工艺优化和控制策略的建立奠定了重要基础。
The dynamic behavior of catalytic distillation column with ethylene glycol monobutyl ether catalyzed by ethylene oxide and n-butanol as raw materials was studied. A driving strategy suitable for the characteristics of the process system is proposed. The dynamic mathematical model of catalytic distillation column driving process was established. The time needed to reach system stability was obtained through simulation calculation. The temperature, component concentration, heat load, reaction rate and vapor in the process of driving were studied and analyzed. Liquid flow and other dynamic distribution characteristics, and with the test results were compared. The research revealed the basic rules of catalytic distillation tower driving process, laid an important foundation for the process optimization and control strategy establishment.