Optimal operation of Kaibel distillation columns

Ghadrdan, Maryam; Halvorsen, Ivar J.; Skogestad, Sigurd

doi:10.1016/j.cherd.2011.02.007

Cited by 50 publications

(30 citation statements)

References 7 publications

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“…It is not working at its preferred split which is AD, but at a sharp BC split. Hence, the columns are no longer working in the most energy efficient way, resulting in a higher energy consumption of the Kaibel configuration compared to the Petlyuk configuration in any case [18]. The Vmin diagram of the original feed is still valid, but only in the prefractionator, and at the BC instead of the AD split.…”

Section: Kaibel Configurationmentioning

confidence: 99%

“…As explained before, this results in the same vapor amount at the AB as well as BC peak for the simulation, which is indicated as a dashed line in the diagram. Internal streams were read out according to Figure 6 and Equation (18), and a detailed description can be found in [12]. All internal streams determined with Figure 9 are shown in Figure 10a.…”

Section: Initialization Of Rigorous Simulationmentioning

confidence: 99%

“…Internal liquid streams are determined by a molar balance at the head of the column, resulting in Equation (18).…”

Section: Petlyuk Cofigurationmentioning

confidence: 99%

“…Therefore, the internal vapor stream at the bottom of the column V B,C 21 is the difference between the performed split (AC) and the prior split (AD) V B,C 21 = V min,AC − V min,AD . Internal liquid streams are determined by a molar balance at the head of the column, resulting in Equation (18).…”

Section: Kaibel Configurationmentioning

confidence: 99%

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Robust Initialization of Rigorous Process Simulations of Multiple Dividing Wall Columns via Vmin Diagrams

2018

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Dividing Wall Columns (DWCs) allow the separation of a ternary mixture in one column shell by applying a vertical partition wall, yielding a reduction of operational and capital costs of up to 30%. Multiple DWC (mDWC), the consequent advancement of standard DWC, makes use of more than one partitioning wall, allowing the separation of quaternary or even higher mixtures in one column shell accompanied by a further reduction of energy consumption. Since no dedicated models for these columns are available in commercial process simulators, thermodynamic consistent flowsheets have to be designed and implemented. The thermally fully coupled Petlyuk arrangement is one important example. However, the initial convergence of these substituting flowsheets is demanding, since a large number of meaningful initial guesses have to be provided. A promising method for generating these first estimates are minimum vapor (V min ) diagrams. All internal flows can be extracted from these diagrams and used for robust initialization of the simulation. The goal of this work is to present the V min method in a comprehensive way in order to initialize mDWC simulations to predict the separation of four component mixtures. Additionally, the adaptation of the diagram to configurations different than Petlyuk arrangements for mDWC is evaluated and a systematic procedure to obtain them is presented. In the end, an example of a converging simulation is given, which was obtained with the values from the V min diagram.

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Section: Kaibel Configurationmentioning

confidence: 99%

Section: Initialization Of Rigorous Simulationmentioning

confidence: 99%

“…Internal liquid streams are determined by a molar balance at the head of the column, resulting in Equation (18).…”

Section: Petlyuk Cofigurationmentioning

confidence: 99%

Section: Kaibel Configurationmentioning

confidence: 99%

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