Dinh San, Lima Fernando V
Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, West Virginia26506, United States.
Ind Eng Chem Res. 2023 Jan 17;62(5):2052-2066. doi: 10.1021/acs.iecr.2c03543. eCollection 2023 Feb 8.
Process modularization is an alternative process design and construction framework, in which modular units are independent and replaceable blocks of a process system. While modular plants have higher efficiency and are safer to construct than conventional stick-built plants (Roy, S. . , , 28-31), they are significantly more challenging to operate because of the loss in the control degrees of freedom that comes with process integration and intensification (Bishop, B. A.; Lima, F. V. , , 2165). To address this challenge, in this work, operability analyses are performed to consider the design and operation of modular units. Initially, a steady-state operability analysis is employed to find a set of feasible modular designs that are able to operate considering different modular plant conditions. A dynamic operability analysis is then applied to the feasible designs to identify the operable designs that are capable of rejecting the operational disturbances. Lastly, a closed-loop control measure is introduced to compare the performances of the different operable designs. The proposed approach is implemented in a modular membrane reactor to find a set of operable designs considering different natural gas wells, and the respective closed-loop nonlinear model predictive control performance of these units is evaluated.
过程模块化是一种可供选择的过程设计与构建框架，其中模块化单元是过程系统中独立且可替换的模块。尽管模块化工厂比传统的装配式工厂具有更高的效率且建造起来更安全（罗伊，S.……，第28 - 31页），但由于过程集成与强化导致控制自由度的损失，其运行难度显著增大（毕晓普，B. A.；利马，F. V.……，第2165页）。为应对这一挑战，在本研究中，开展了可操作性分析以考量模块化单元的设计与运行。首先，进行稳态可操作性分析以找到一组可行的模块化设计方案，这些方案在考虑不同模块化工厂条件的情况下能够运行。接着，对可行设计方案进行动态可操作性分析，以识别能够抵御运行干扰的可操作设计。最后，引入闭环控制措施来比较不同可操作设计的性能。所提出的方法在模块化膜反应器中得以实施，以找到一组考虑不同天然气井的可操作设计方案，并对这些单元各自的闭环非线性模型预测控制性能进行评估。
