Mixing of fine concentrated suspensions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F14%3A00221158" target="_blank" >RIV/68407700:21220/14:00221158 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mixing of fine concentrated suspensions

Popis výsledku v původním jazyce

In the paper, the effect of particle concentration on critical impeller speed necessary for mixing of fine suspensions is presented. A single down pumping folded blade turbine with vessel to impeller diameter ratio D/d = 3 was used for mixing of a chalksuspensions. Measurements were carried out in cylindrical baffled vessel with diameter 300 mm. The mean volumetric diameter of particles was 4.6 ?m and their mean volumetric concentration was changed in the range from 2.5 % to 40 %. The Bingham model wasused for rheological behaviour description of chalk suspensions. A specific dimensionless criterion was used for calculation of critical speed. The criterion is proportional to the ratio of dynamic pressure to yield stress. The value of this criterion obtained for folded blade turbine was compared with corresponding values reported earlier for standard pitched blade turbine and also for three types of impellers produced by TECHMIX. There are also compared the different types of impeller

Název v anglickém jazyce

Mixing of fine concentrated suspensions

Popis výsledku anglicky

In the paper, the effect of particle concentration on critical impeller speed necessary for mixing of fine suspensions is presented. A single down pumping folded blade turbine with vessel to impeller diameter ratio D/d = 3 was used for mixing of a chalksuspensions. Measurements were carried out in cylindrical baffled vessel with diameter 300 mm. The mean volumetric diameter of particles was 4.6 ?m and their mean volumetric concentration was changed in the range from 2.5 % to 40 %. The Bingham model wasused for rheological behaviour description of chalk suspensions. A specific dimensionless criterion was used for calculation of critical speed. The criterion is proportional to the ratio of dynamic pressure to yield stress. The value of this criterion obtained for folded blade turbine was compared with corresponding values reported earlier for standard pitched blade turbine and also for three types of impellers produced by TECHMIX. There are also compared the different types of impeller

Druh

O - Ostatní výsledky

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

<a href="/cs/project/TA02010243" target="_blank" >TA02010243: Míchací zařízení pro zpracování kalových suspenzí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů