<p>Izmenama u konstrukciji vertikalne mešalice zamenom originalne obloge pužnice sa oblogama koje su imale 13,5%, 27% i 40% perforacija je poboljšan proces mešanja. Ova poboljšanja se ogledaju u skraćenju vremena mešanja 15%, 30% i 50% u odnosu na originalnu konstrukciju, smanjenju utroška rada i energije i otvaranja mogućnosti vraćanja ove vrste mešalica u masovniju upotrebu, jer su troškovi kupovine i održavanja ove vrste mešalica daleko niži u odnosu na druge. Izrađen je model sistem za cilindričnu mešalicu, na bazi primene teorije Markovljevog niza, kao pogodan način za predviđanje procesa mešanja u ovoj vrsti mešalica, čak i u industrijskim uslovima. Dobijeni rezultati<br />su pokazali slaganje sa eksperimentalno dobijenim rezultatima, pri čemu je utvrđeno vreme neophodno za postizanje homogenosti u cilindričnoj mešalici iznosilo 5 minuta za odnos mešanja 1:10.000, dok za odnos mešanja 1:100.000 i vreme od 5 minuta, homogenost nije postignuta Poređenjem rezultata programa za analizu slike, koji je prethodno razvijen u okviru metode Microtracer-a, sa ručno dobijenim rezultatima, utvrđen je visok stepen korelacije (R=0.995, 0.979 i 0.987) i ovaj program je ocenjen kao značajno poboljšanje i skraćenje vremena potrebnog za dobijanje rezultata.</p> / <p>Changes in the construction of vertical mixers by replacement of the original screw barrel with barrel which had 13.5%, 27% and 40% perforation generally have improved process of mixing. These improvements are reflected in shortening the mixing time of 15%, 30% and 50% comparing to the original construction, reduction of labor and energy and create the possibility of returning these types of mixers in the more common, as the cost of purchasing and maintaining these types of mixers is far lower compared to others. A model system for the cylindrical mixer, based on the theory of Markov chain, as a convenient way to predict the mixing process in this type of mixer, even in industrial conditions. The results show agreement with experimental results, with a determined time necessary to achieve homogeneity in a cylindrical mixer was 5 minutes for mixing ratio 1:10,000, and more than 5 minutes for the mixing ratio 1:100,000. Comparing the results of program for image analysis, which was previously developed under a Microtracers methods with manually obtained results revealed a high degree of correlation (R = 0995, 0979 and 0987) and this program was rated as significantly improving and shortening the time needed to obtain results</p>
| Identifer | oai:union.ndltd.org:uns.ac.rs/oai:CRISUNS:(BISIS)77075 |
| Date | 30 September 2011 |
| Creators | Đuragić Olivera |
| Contributors | Lević Ljubinko, Džinić Natalija, Stanaćev Vidica, Lević Jovanka |
| Publisher | Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, University of Novi Sad, Faculty of Technology at Novi Sad |
| Source Sets | University of Novi Sad |
| Language | Serbian |
| Detected Language | English |
| Type | PhD thesis |
| Format | application/pdf |
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