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Author

Marc Dupoizat

Other affiliations: Areva NC
Bio: Marc Dupoizat is an academic researcher from Areva. The author has contributed to research in topics: Heat exchanger & Kiln. The author has an hindex of 1, co-authored 1 publications receiving 23 citations. Previous affiliations of Marc Dupoizat include Areva NC.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a rotary kiln equipped with an external electrical heating system enables the study of the influence of various parameters such as the solid flow rate, the kiln inclination angle, the rotational speed, or the presence of lifters on heat exchange and in particular on the heat exchange coefficient between the solid and the wall.
Abstract: Rotary kilns are widely used in several branches of the chemical industry. In order to control the temperature of the solid and the gas flowing through the kiln, it is important to understand the heat exchange phenomena that occur. The design and construction of a novel experimental device to study heat exchange in rotary kilns is described. The device, which comprises a rotary kiln equipped with an external electrical heating system, enables the study of the influence of various parameters such as the solid flow rate, the kiln inclination angle, the rotational speed, or the presence of lifters on heat exchange and in particular on the heat exchange coefficient between the solid and the wall. Preliminary experimental results concerning the influence of the solid flow rate and the rotational speed on the solid-to-wall heat exchange coefficient are presented.

24 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the axial dispersion coefficient of the solid particles within a rotary kiln at room temperature and equipped with lifters has been analyzed for the continuous flow of sand and broken rice.

51 citations

Journal ArticleDOI
TL;DR: In this article, the authors modeled conductive heat transfer from rotary drum walls to a particle bed via discrete element method simulations, and three time scales were determined: 1) the characteristic heating time of the bed, τ; 2) the particle thermal time constant, τp; and 3) the contact time between a particle and the wall, τc.

41 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of operational variables and material properties on the mean residence time (MRT), hold up, and axial dispersion was investigated in a pilot plant rotary calciner.
Abstract: Rotary calcination is widely used in catalyst manufacturing and many other industrial processes. In this article, the influence of operational variables and material properties on the mean residence time (MRT), hold up, and axial dispersion was investigated in a pilot plant rotary calciner. Residence time distributions (RTD) of spherical, cylindrical, and quadrilobe catalyst particles were measured and contrasted. The Saeman's model was successfully applied to predict the experimental bed depth and the MRT as particles flowed through the calciner. It was observed that increasing the feed rate did not significantly affect the MRT. Results for the different particles indicated that cylinders and quadrulobes exhibited less axial dispersion than spheres due to the decreased flowability. A reliable method was developed to provide a reasonable RTD prediction in rotary calcination systems. © 2013 American Institute of Chemical Engineers AIChE J, 59: 4068–4076, 2013

34 citations

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TL;DR: In this article, the authors deal with the heat transfer analysis from experimental apparatus installed in a large-scale rotary drum reactor applied to the asphalt materials production and compare the results with major results of the literature.

32 citations

Journal ArticleDOI
TL;DR: In this article, a coupled thermal-granular model is applied to a flights rotary kiln for hot-mix asphalt materials manufacture, where the exchange surfaces estimation governing the heat transfer phenomena is calculated in the kiln cross-section.

31 citations