Liquid Distribution in a Semi-Industrial Packed Column - Experimental and Theory

Dzhonova-Atanasova, Daniela; Semkov, Krum; Petrova, Tatyana; Darakchiev, Simeon; Stefanova, K. V.; Nakov, Svetoslav; Popov, Roman

doi:10.30721/fsab2018.v1.i1.15

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Based on these studies, our efforts are directed towards development of a CFD model of a counter-current two-phase flow, proper for structured packings (as well as random packings). The experimental data obtained in this work and in [12,13,23] are currently used for the development and verification of the proposed model.…”

Section: Resultsmentioning

confidence: 99%

Studying the process of freons mixture separation on a structured packing Sultzer 500X

et al. 2021

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Structured packings are widely used in distillation columns to separate various types of mixtures. These packings have an ordered structure, which ensures more uniform conditions for interaction of counter-current flows of liquid and vapor than in the random packings and have a small hydraulic resistance. Nevertheless, in columns with a diameter of more than 0.5 m, formation of large-scale non-uniformity in distribution of liquid and vapor flow parameters over the packing cross-section is observed. In this work, experimental data on formation of large-scale non-uniformity in the temperature field over the cross-section of the Sulzer 500X packing, as well as on the efficiency of mixture separation and the pressure drop across the packing were obtained. The experiments were carried out with separation of R114/R21 freon mixture on a 10-layer structured packing Sulzer 500X with a diameter of 0.6 m and a height of 2.2 m. Experimental data were compared with the results obtained earlier for a structured packing Mellapack 350.Y with a diameter of 0.9 m and a height of 2.1 m. The presented experimental data will be used to construct and verify a new model of mass transfer and efficiency of mixture separation in the large-scale distillation packed columns.

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Section: Resultsmentioning

confidence: 99%

Studying the process of freons mixture separation on a structured packing Sultzer 500X

et al. 2021

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“…Um die Phasenverteilung in Packungskolonnen beurteilen zu können, existieren zahlreiche experimentelle Methoden. Zur Charakterisierung der Fluiddynamik werden unter anderem Tracer , Tomographen , , Gittersensoren , , Thermoelemente oder Flüssigkeitssammler eingesetzt. Abhängig von der Messmethode können Rückschlüsse auf die Verteilung der Flüssig‐ und Gasphase gezogen oder zudem Erkenntnisse zum Stoffübergang erhalten werden.…”

Section: Introductionunclassified

Vergleich von Berechnungsmethoden des TUM‐WelChem‐Zellenmodells für die Querverteilung in Füllkörperschüttungen

Winkler

Wasensteiner

Kender

et al. 2020

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Die Flüssigkeitsmaldistribution für eine Ø1,2 m-Füllkörperkolonne wird mit dem TUM-WelChem-Zellenmodell simuliert und mit Experimentaldaten verglichen. Untersucht werden die Füllkörper Raflux Ring 50-5 Metall, Hiflow Ring 50-6 Kunststoff und RVT Metall Sattel Ring 50-4. Es werden zwei Berechnungsmethoden für die Modellierung der Querverteilung auf einer Zellebene angewandt: eine sequenzielle und eine simultane Methode. Eine Paritätsanalyse und die Auswertung der relativen Abweichung der Berechnungen zu den Versuchsergebnissen liefern Erkenntnisse über Annahmen und Gültigkeiten des Modells.

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Inverse Boundary Conditions Interface Problems for the Heat Equation with Cylindrical Symmetry

Koleva,

Vulkov

2024

Symmetry

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In this paper, we study inverse interface problems with unknown boundary conditions, using point observations for parabolic equations with cylindrical symmetry. In the one-dimensional, two-layer interface problem, the left interval 0<r<l1, i.e., the zero degeneracy, causes serious solution difficulty. For this, we investigate the well-posedness of the direct (forward) problem. Next, we formulate and solve five inverse boundary condition problems for the interface heat equation with cylindrical symmetry from internal measurements. The finite volume difference method is developed to construct second-order schemes for direct and inverse problems. The correctness of the proposed numerical solution decomposition algorithms for the inverse problems is discussed. Several numerical examples are presented to illustrate the efficiency of the approach.

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Liquid Distribution in a Semi-Industrial Packed Column - Experimental and Theory

Cited by 3 publications

References 4 publications

Studying the process of freons mixture separation on a structured packing Sultzer 500X

Studying the process of freons mixture separation on a structured packing Sultzer 500X

Vergleich von Berechnungsmethoden des TUM‐WelChem‐Zellenmodells für die Querverteilung in Füllkörperschüttungen

Inverse Boundary Conditions Interface Problems for the Heat Equation with Cylindrical Symmetry

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