Die Messung von Tropfengrößen in pulsierten Siebboden-Extraktionskolonnen mit der Absaugsonde / Measurement of drop diameters in pulsed sieve-plate extraction columns

Aufderheide, Eberhard; Niebuhr, David; Vogelpohl, Alfons

doi:10.1524/teme.1983.50.jg.237

Cited by 7 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This distribution indicates the fraction of the drops in each size interval which pass through the column cross-section at the respective site of measurement during the measuring period. A detailed description of the photoelectric measuring system and the procedure for signal trimming and recognition of errors are given in [7].…”

Section: Apparatus and Measurement Techniquesmentioning

confidence: 99%

Fluid dynamics of pulsed sieve plate extraction columns

1990

View full text Add to dashboard Cite

The present contribution reports on comprehensive hydrodynamic investigations in two pulsed sieve-plate extraction columns (PSE) on a pilot scale. The experiments were conducted with three different sieve plate geometries employing test systems recommended by EFCE, under varying pulsation conditions and throughputs. The results of the investigation add to the existing knowledge of relationships between hydrodynamic parameters, drop size, hold-up, flooding throughput and mixing and operating parameters. They also provide useful information for scaleup, selection of sieve-plate geometry, most favourable operating range, and constructive design of equipment. On the basis of measurements, analytical methods are recommended for prediction of PSE hydrodynamics.

show abstract

Section: Apparatus and Measurement Techniquesmentioning

confidence: 99%

Fluid dynamics of pulsed sieve plate extraction columns

1990

View full text Add to dashboard Cite

show abstract

A new method for the prediction of liquid pulsed sieve‐tray extractors

Pietzsch

Blaß

1987

Chem Eng & Technol

View full text Add to dashboard Cite

As a part of a research project on the mass transfer in liquid pulsed sieve-tray extraction columns (PSE), the diameters and hold-ups of the drops were measured: the drop size using a suction technique, with photoelectric detection, which was adapted to the special boundary conditions of the PSE; the integral hold-up by the pressure difference between the lower and upper parts of the column. Since experimental results cannot be described by known calculation formulae for the Sauter mean diameter and the hold-up, a new method of calculation was developed. It is phenomenologically based on high-speed photographs of the drop motion on a sieve tray. The mathematical-physical model allows the prediction of drop size and hold-up within certain limits, while the possible different operating regimes of the PSE, i.e. the mixer-settler and dispersion regimes can also be estimated.

show abstract

Dynamic behaviour and simulation of a liquid‐liquid extraction column

Hufnagl¹,

McIntyre²,

Blaß³

1991

Chem Eng & Technol

View full text Add to dashboard Cite

Dynamic behaviour of a stirred liquid-liquid extraction column was studied experimentally. Various input variables of the column were varied stepwise and the resulting variations in the system and output variables were measured. In addition to experimental work, a computer model was developed on the basis of the dispersion model to simulate the dynamic behaviour of the extractor. This model forms a component program of the dynamic process simulator DIVA, developed at the TU Stuttgart. The experiments showed that the hydrodynamic parameters exhibit no significant dynamic behaviour of their own. Therefore, changes occurring in these parameters closely follow variations in input and system variables. As a result, steady-state relationships for the calculation of flow parameters could be used in the simulation program. The simulator satisfactorily reproduced the experimental results for a number of disturbances. However, this was not always the case. As shown in the following, the model did not take into account the column level controller which, under certain conditions, exerts a very strong influence on the column's dynamic behaviour. As a result, larger differences occurred between experimental and simulated data. This influence on the extractor's dynamic behaviour can, however, be eliminated by a simple modification of the level controller arrangement.

show abstract

Die Messung von Tropfengrößen in pulsierten Siebboden-Extraktionskolonnen mit der Absaugsonde / Measurement of drop diameters in pulsed sieve-plate extraction columns

Cited by 7 publications

References 2 publications

Fluid dynamics of pulsed sieve plate extraction columns

Fluid dynamics of pulsed sieve plate extraction columns

A new method for the prediction of liquid pulsed sieve‐tray extractors

Dynamic behaviour and simulation of a liquid‐liquid extraction column

Contact Info

Product

Resources

About