Measurement techniques for drop size distributions in stirred and fast coalescing liquid-liquid systems

• Autorzy: Maass S. , Horn S. , Kraume M.

Warianty tytułu

PL

Techniki pomiarowe rozkładu wielkości kropel w mieszanych koagulujących systemach ciecz-ciecz

• Języki publikacji: EN

Abstrakty

EN

Complete models in stirred tanks for the drop size distribution as a function of power-input, material and process parameters are rare and relatively inaccurate. Furthermore industrial applications, like e.g. suspension polymerization processes, require a distinct average drop diameter and a small standard deviation of the distribution. An overview is given for already existing measurement technique: sound, laser and photo based techniques. The Lasentec FBRM[zastrzeżony znak towarowy] [22], which gives online, and in-situ information and an in house developed endoscope technique [21] will be discussed in detail. It is clearly shown, that the laser based method gives only qualitatively good but fast results for the tested system toluene/water. The quantitatively accurate experimental results of the endoscope technique gave a good base for testing and developing numerical models for even transient behavior of drop size distributions.

PL

Kompletne modele rozkładu wielkości kropel w mieszalnikach mechanicznych w funkcji zapotrzebowania mocy, składników i parametrów procesu występują rzadko i są stosunkowo niedokładne. Dodatkowo, zastosowania przemysłowe, np. zawiesinowe procesy polimeryzacji wymagają dokładnego określenia średniej wielkości kropli i niskiej wartości odchylenia standardowego w rozkładzie. Przedstawiono przegląd stosowanych technik pomiarowych: akustycznych, laserowych i fotograficznych. Porównano zastosowanie i możliwości pomiarowe układu FBRM Lasentec[registred trademark] [22] z oryginalnym endoskopowym układem pomiarowym [21] dla układu toulen-woda. Widoczne jest, że technika laserowa daje szybkie wyniki, ale tylko jakościowe. Dokładne, ilościowe wyniki uzyskane techniką endoskopową stanowić mogą podstawę dla modeli numerycznych nawet w przejściowym zakresie rozkładu wielkości kropel.

Słowa kluczowe

EN

drop size distribution; endoscope technique; laser technique; measurement technique

PL

rozkład wielkości kropel; technika endoskopowa; technika laserowa; technika pomiarowa

• Wydawca: Wydawnictwo Politechniki Krakowskiej im. Tadeusza Kościuszki
• Czasopismo: Czasopismo Techniczne. Mechanika
• Rocznik: 2008
• Tom: R. 105, z. 5-M
• Strony: 219--230
• Opis fizyczny: Bibliogr. 27 poz.,Rys., il.,

Twórcy

autor

Maass S.

autor

Horn S.

autor

Kraume M.

• Institut fur Prozess- und Verfahrenstechnik, Technische Universitat Berlin

Bibliografia

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