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Étude théorique et experimentale du transfert de matière dans les procédés d'ennoblissement des textiles : application au lavage

Abstract : This work deals with the material transfers relative to the textiles enoblishment processes. First, a reminder of the processes used during the pre-treating of textiles allows us to situate the context and the main principles of the textile industry, thus we have focalized on the washing processes. An experimental system was set up to measure the speed of transfer of a marker through the material, dealing with it as a pseudo-homogeneous medium. These results allowed us to identify the most influential parameters in the speed of matter transfer : hydrodynamics and temperature, temperature having a lesser incidence. We then tried to increase the matter transfer speed. By an analogy with the concept of some heat exchangers, the idea occurred of the addition of agitators consisting of intermittent narrowing of the flow section, these narrowing bring about a convective transfer through the rnaterial. The experiments revealed transfer speeds at least 15 lime greater than before. Then, a diagnostic was made on an industrial washer thanks to the Resident Time Distribution (RTD)method. The results revealed three major dysfunctions : 20 % dead areas, dissymmetry of the flow on the width of the material, then an overlong time to get up to speed (around 1 1/2 hours), comparing to the resident lime of the fabric. AlI these results turned towards the concept of a new washing process based on the use of agitators, which has the advantage of taking less space than traditional processes, and having better efficiencies in term of water consumption and thermal losses. This prototype is under construction and this concept is already protected with the INPI, a Soleau envelope having been deposited with them.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/INPL_T_2001_CHARRETTE_H.pdf
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https://hal.univ-lorraine.fr/tel-01750299
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Submitted on : Thursday, March 29, 2018 - 12:42:33 PM
Last modification on : Friday, February 26, 2021 - 3:36:03 PM

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  • HAL Id : tel-01750299, version 1

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Hervé Charrette. Étude théorique et experimentale du transfert de matière dans les procédés d'ennoblissement des textiles : application au lavage. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2001. Français. ⟨NNT : 2001INPL585N⟩. ⟨tel-01750299⟩

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