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Chrome vacuum tannage : An eco-friendly process / Wen Huaixing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 5 (09-10/2007)
[article]
Titre : Chrome vacuum tannage : An eco-friendly process Type de document : texte imprimé Auteurs : Wen Huaixing, Auteur ; Zhang Chuanbo, Auteur ; Ren Hunjun, Auteur ; Zhu Huaijie, Auteur Année de publication : 2007 Article en page(s) : p. 196-200 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Déchets -- Réduction
Tambours (tannage)
Tannage au chrome
Tannage sous videIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to ameliorate technological problems such as the pollution due to leather tannage and the long process time, a vacuum mechanism has been developed and is proposed as a tanning method. This article describes the mechanism and characteristics of vacuum tannage and analyzes the major factors affecting the course of vacuum tannage. The results show that, on the premise of increasing the overall quality of leather tannage, the working time is greatly shortened and the discharge of waste liquid is decreased by more than 50 %. Note de contenu : - VACUUM TANNING MECHANISM : Leather de-gasification - Adsorption and de-adsorption on the leather surface and internal fibre surface - Combination between leather/hide and chemicals
- VACUUM CHROME TANNING EXPERIMENTS : Comparison of permeability - Chrome tanning experiment - Repeated use of waste tan liquor
- ANALYSIS OF MAIN FACTORS AFFECTING VACUUM TANNAGE : Vacuum - Temperature - Mechanical function - Tanning agent offer
- STRUCTURE OF THE VACUUM TANNING DRUM
- Table 1 : Chrome tanning technological experiment and resultsEn ligne : https://drive.google.com/file/d/1D6gw0VeNYGg6QEVhUF6GC4xEht8RDY2S/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39012
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 5 (09-10/2007) . - p. 196-200[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Drum geometry and design / E. Longstaff in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 58 (Année 1974)
[article]
Titre : Drum geometry and design Type de document : texte imprimé Auteurs : E. Longstaff, Auteur Année de publication : 1974 Article en page(s) : p. 41-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Mélange
Tambours (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tanning drums fitted with horizontal shelves and or stub pegs are now known to be poor mixers. Scaled experiments with Perspex model drums show that the mixing efficiency can be improved by replacing the traditional fittings with extra long flat-faced pegs (EL-pegs) angled preferably at 45° to the forward movement of the drum. For optimum effect the length of the EL-pegs requires to be at least 0.33 of the drum diameter. Data obtained from the experi¬ments has been used to modify at low colt, large wooden drums in regular tannery use. Note de contenu : - INTRODUCTION : Angled shelves versus pegs
- DESCRIPTION OF OTTO SPECHT DRUM
- EXPERIMENTS WITH ANGLED PEGS OF NORMAL LENGTH : The effect on small leather loads - The effect on large leather loads
- EXPERIMENTS WITH LONG ANGLED PEGS OR SWEEPS : The effect on loads with low or medium floats - The effect on long floats
- EXPERIMENTS WITH EXTRA-LONG ANGLED PEGS : The effect of six extra-long pegs - The effect of four extra-long pegs and two standard pegs
- PRINCIPLE OF ANGLED EXTRA-LONG PEGS : Optimum peg lengths - Optimum number of pegs - Optimum number of rows of pegs
- SECOND SERIES OF EXPERIMENTS WITH WIDE PERSPEX LABORATORY DRUM : Description of wide Perspex laboratory drum
- EXPERIMENTS WITH WIDE PERSPEX DRUM : The effect on leather movement - The effect on the float
- APPLICATION TO TANNERY DRUMS
- Table 1 : The effect of peg shape on transverse movement of skins in a tanning drumEn ligne : https://drive.google.com/file/d/1XgHWkFrh76XtjTYnNNv59biGk5zjy62f/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35482
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 58 (Année 1974) . - p. 41-47[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008594 - Périodique Archives Documentaires Exclu du prêt Experimental and computational fluid dynamics investigation on tanning process in a rotating drum / Yirui Lin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 11 (11/2023)
[article]
Titre : Experimental and computational fluid dynamics investigation on tanning process in a rotating drum Type de document : texte imprimé Auteurs : Yirui Lin, Auteur ; Zhoucheng Jiang, Auteur ; Ya-Nan Wang, Auteur ; Yunhang Zeng, Auteur ; Guo Xie, Auteur ; Bi Shi, Auteur Année de publication : 2023 Article en page(s) : p. 485-495 Note générale : Bibliogr Langues : Américain (ame) Catégories : Adsorption
Cuirs et peaux
Fluides, Dynamique des
Mécanique des fluides numériquesLa mécanique des fluides numérique (MFN), plus souvent désignée par le terme anglais computational fluid dynamics (CFD), consiste à étudier les mouvements d'un fluide, ou leurs effets, par la résolution numérique des équations régissant le fluide. En fonction des approximations choisies, qui sont en général le résultat d'un compromis en termes de besoins de représentation physique par rapport aux ressources de calcul ou de modélisation disponibles, les équations résolues peuvent être les équations d'Euler, les équations de Navier-Stokes, etc.
La CFD a grandi d'une curiosité mathématique pour devenir un outil essentiel dans pratiquement toutes les branches de la dynamique des fluides, de la propulsion aérospatiale aux prédictions météorologiques en passant par le dessin des coques de bateaux. Dans le domaine de la recherche, cette approche est l'objet d'un effort important, car elle permet l'accès à toutes les informations instantanées (vitesse, pression, concentration) pour chaque point du domaine de calcul, pour un coût global généralement modique par rapport aux expériences correspondantes.
Domaines d'application : La CFD est particulièrement employée dans les domaines des transports, pour étudier notamment le comportement aérodynamique des véhicules (automobile, aéronautique, etc) conçus.
La CFD est également utilisée dans le domaine des installations critiques telles que les salles de serveurs. Elle permet de réaliser une représentation 3D de la salle, comprenant toutes les informations relatives aux équipements informatiques, électriques et mécaniques. On obtient une carte graduée des différentes zones de chaleur présentes, ce qui permet de détecter les zones critiques et les points chauds (ou "hot spots").
Mouvement rotatoire
Simulation par ordinateur
Tambours (tannage)
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
Transfert de masse
ZirconiumIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Mass transfer of chemicals greatly affects leather production efficiency and product quality. Leather shows different motions in a rotating drum during processing, which is strongly associated with chemicals’ mass transfer. However, how leather motions affect mass transfer remains unclear, which disfavors highly efficient leather manufacturing process. Here, different leather motion states were obtained by adjusting the drum rotation speed. Experimental results showed that the duration of leather rolling motion greatly increased by 41% when the rotation speed increased from 5 r/min to 20 r/min, and the uptake of the tanning agent was consequently improved, which indicated that the rolling motion is beneficial to mass transfer. Computational fluid dynamics simulation results showed that the mass transfer rate under rolling motion was higher than those under slipping, elevating and hanging motions, because the flow velocity and concentration gradient near the leather surface were higher under rolling motion. Accordingly, increasing the rolling motion enhanced the mass transfer in leather processing. This work identifies the leather motion beneficial for mass transfer and provides guidance on operating condition optimization and drum design for high-efficiency leather production. Note de contenu : - EXPERIMENTAL : Materials - Tanning experiments - Visualization of leather motions - Analysis of mass transfer of zirconium tanning agent in leather - Analysis of leather tanning performance - CFD validation of leather motion states
- RESULTS AND DISCUSSION : Leather motion characteristics under different rotation speeds - Mass transfer of zirconium tanning agent - Effect of leather motion states on mass transfer analyzed by CFD - Velocity distribution - Mass transfer of zirconium
- Table 1 : Zirconium tanning process
- Table 2 : PSO and PFO kinetic parameters for zirconium adsorptionDOI : https://doi.org/10.34314/jalca.v118i11.8242 En ligne : https://drive.google.com/file/d/1VyNSOObv09FyLU4lIOUZPhbuwI4xk2We/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40047
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 11 (11/2023) . - p. 485-495[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24291 - Périodique Bibliothèque principale Documentaires Disponible
[article]
Titre : From wooden vats to fibreglass drums Type de document : texte imprimé Année de publication : 1993 Article en page(s) : p. 64-65 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Cuves
Polyesters
Tambours (tannage)
Tannage -- Appareils et matérielsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé :
If Lime can be taken as a positive sign of company evolution, Canbar Inc, Canada, can be considered as a success at it now celebrates 121 years since being founded by Mr. Charles Mueller in 1872.
In 1920 the company expanded its activities from the manufacture of wooden vats and tanks for the paper, mining and food processing industries through involvement with the leather industry, and this association has continued until the present.
Wooden drums were produced as large as 4.3 x 4.3 metres, but in the 1950s the company became interested in using alternative materials in the construction of tanning equipment. The choice of fibreglass reinforced polyester presented an interesting challenge as the manufacturing techniques were very different from those used with traditional materials. It was felt, however, that the versatility and the corrosion resistance offered by this material could provide distinct advantages to the tanning industry.
Experience was gained through the manufacture and use of fibreglass belt driven drums, and the relatively untried material proved successful in the severe conditions found in tanneries.Note de contenu : - Fig. 1 : Heavy-duty power end assures continuous operation
- Fig. 2 : Front support by inertia ring mounted on heavy duty 16 rollers
- Fig. 3 : Fins have an open pitch broadening into shelves at the back end. Edges are designed to give two different load treatments depending on forward or reverse motion. In either, sliding and tumbling action gives maximum diffusion
- Table : Capacity chartEn ligne : https://drive.google.com/file/d/1gW4YPw-EnvMh7_qt4GKtKwS22_A4TE0H/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35186
in WORLD LEATHER > Vol. 6, N° 7 (12/1993 - 01/1994) . - p. 64-65[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008093 - Périodique Bibliothèque principale Documentaires Disponible Use of Cangilones drums to give water and energy savings in the beamhouse / Josep Maria Morera in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)
[article]
Titre : Use of Cangilones drums to give water and energy savings in the beamhouse Type de document : texte imprimé Auteurs : Josep Maria Morera, Auteur ; Esther Bartoli, Auteur ; Luisa F. Cabeza, Auteur ; Marc Medrano, Auteur Année de publication : 2007 Article en page(s) : p. 1-3 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eau -- Consommation -- Réduction
Tambours (tannage)
Travail de rivière (cuir)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tannery industry uses huge amounts of water and increasingly more energy. Any attempt to reduce this use would result in economic savings in the processing of hides. It can be seen in this paper that the use of new types of drums for processing leather, called Cangilones drums [cangilones = scoops/buckets], can result in important technical advantages for the tanneries as well as water and energy savings. The technical advantages are derived from the design of the drums. This design determines the physical movement of the load inside the drums. In the Cangilones drum, the movement of the hides is caused by gravitational forces and the float moves with the hides.
Consequently, the penetration of chemicals is greater and the wastewater is more highly exhausted. Less float is needed for processing the hides and water savings are thus obtained.Note de contenu : - Experimental details
- Methodology
- Procedure
- Table 1 : Comparison between traditional and Cangilones drums
- Table 2 : Characteristics of the traditional drum
- Table 3 : Comparison of water consumption in the processEn ligne : https://drive.google.com/file/d/18bsFdLQ1qjcAnkrYwb3NGVHMuajGX4_Y/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39038
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 1 (01-02/2007) . - p. 1-3[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire