Optimal Design, Proportional-Integral and Model Predictive Control of Intensified Process for Formic Acid Production I: Reactive Distillation and Reactive Dividing Wall Column
Optimal Design, Proportional-Integral and Model Predictive Control of Intensified Process for Formic Acid Production I: Reactive Distillation and Reactive Dividing Wall Column
复制标题
甲酸生产强化工艺的优化设计、比例积分和模型预测控制Ⅰ：反应精馏和反应隔壁塔
DOI：
10.1021/acs.iecr.0c04705
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发表时间：
2020
影响因子：
4.2
通讯作者：
Botong Liu
中科院分区：
文献类型：
--
作者：
Xiaolong Ge;Xinchuang Yang;Yicheng Yang;Yu Pan;Botan Liu;Botong Liu
通过甲酸甲酯水解生产甲酸已被证明是能源和资本成本密集型的，并且其性能可以通过过程强化来显著提高。然而，反应和分离的集成表现出复杂的非线性行为，这需要在进一步的工业实施之前有效地解决相应的优化和控制。本文首次采用遗传算法和严格模拟相结合的方法对常规反应精馏过程和反应分隔壁塔进行了优化，并引入了用户自定义的动力学模型。虽然结果表明RDWC在经济性标准方面不如RD，但它为在本系列的后续第2部分中提出新的易于操作的配置提供了基础。然后，分别针对常规RD过程和RDWC过程设计了多回路比例积分（PI）控制结构和线性模型预测控制（MPC）方案。采用振荡、稳定时间、超调量和误差平方积分（伊势）等定量指标，比较了两种控制结构在反馈扰动下的性能。动态响应验证了MPC优于经典的多回路控制方案，并且可以解决常规RD过程和RDWC PI控制中的过度超调缺陷。
Formic acid production through methyl formate hydrolysis has been shown to be energy and capital cost intensive, and its performance could be significantly promoted by process intensification. However, integration of reaction and separation.exhibits a complex nonlinear behavior, which requires corresponding optimization and control to be effectively addressed before.further industrial implementation. In the present work, optimization was first performed for a conventional reactive distillation (RD).process and reactive dividing wall column (RDWC) by coupling genetic algorithm and rigorous simulations, in which a user-defined.model was incorporated to take kinetics into account. Although the results demonstrate that RDWC is inferior to RD in terms of.economic criteria, it provides the basis for proposing new easy-to-operate configurations in the subsequent part 2 of this series. Then.multiloop proportional−integral (PI) control structures and linear model predictive control (MPC) schemes were designed for the.conventional RD process and RDWC, respectively. The performances of two control structures were compared subject to feed.disturbance, by using quantitative indexes such as oscillation, settling time, overshoot, and integral of the squared error (ISE). The.dynamic response validates that MPC outperforms classical multiloop control schemes and could tackle the excessive overshoot.deficiency in PI control for both the conventional RD process and RDWC.