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Title:Multiple-effect evaporation in aluminosilicate technology
Authors:ID Klinar, Dušan (Author)
ID Golob, Janvit (Author)
Files:.pdf Acta_Chimica_Slovenica_2001_Klinar,_Golob_Multiple-effect_evaporation_in_aluminosilicate_technology.pdf (354,14 KB)
MD5: 9ADF3876E1AF16C088801EF4CE53A958
PID: 20.500.12556/dkum/a97e9c31-c817-4681-8b67-e0c3857f5974
 
URL http://acta-arhiv.chem-soc.si/48/48-4-565.pdf
 
Language:English
Work type:Scientific work
Typology:1.04 - Professional Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:The article presents an engineering approach to the development of an alternative production with the existing equipment. Zeolite production is becoming an alternative to the old »Bayer« process for aluminum hydrate production. By applying appropriate know-how old equipment was used for an economically as well as ecologically acceptable production. In this equipment adaptation among other production steps the multistage evaporation battery was the most critical part of the process. We applied semi empirical approach on the basis of Z. Rant ideas to find heat transfer coefficients and to determine which equipment elements are more relevant for efficient performance and need serious maintenance.
Keywords:chemical engineering, evaporation in silicate technology, bauxite alumina production, evaporators, process optimization, heat transfer, heat flow, empirical equations, heat transfer coefficients, zeolites
Publication status:Published
Publication version:Version of Record
Year of publishing:2001
Number of pages:str. 565-573
Numbering:Letn. 48, št. 4
PID:20.500.12556/DKUM-67594 New window
ISSN:1318-0207
UDC:66.048.5:66.021.4:661.183.6
ISSN on article:1318-0207
COBISS.SI-ID:24010757 New window
NUK URN:URN:SI:UM:DK:FY3XAVCB
Publication date in DKUM:24.08.2017
Views:1618
Downloads:112
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Acta Chimica Slovenica
Shortened title:Acta Chim. Slov.
Publisher:Slovensko kemijsko društvo
ISSN:1318-0207
COBISS.SI-ID:14086149 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:24.08.2017

Secondary language

Language:Slovenian
Title:Uparjanje v silikatni tehnologiji
Abstract:Vse večji ekološki interes za širitev uporabe zeolitov je ponudil možnost za prenovo starega Bayerjevega procesa proizvodnje glinice iz boksita. Pri uvajanju novega izdelka se je pokazalo uparevanje odpadnega NaOH kot ključna rešitev, ki je omogočala rešitev ekologije (recikliranje) kakor ekonomike proizvodnje. Poglobljen inženirski pristop je omogočil revitalizacijo in učinkovito obratovanje več kot 50 let starega postrojenja. Uporabili smo polempiričen pristop na osnovi ideje Z. Ranta ter nekatere preizkušene empirične enačbe različnih avtorjev. Ideja je, da najprej izračunamo funkcije ΔT = f (q) za posamezen prehod ali prestop (iz pare na steno cevi, skozi steno cevi, skozi oblogo in v vrelo raztopino) nato pa vsoto vseh funkcij – sumarni graf (SLIKA4.) za vsak uparilnik posebej, takšen graf nam nato omogoča določiti q glede na lahko merljiv ΔT med nasičeno paro in vrelo raztopino. Znan q nam omogoča izračun posamičnih koeficientov prenosa toplote, končno pa tudi celotnega koeficienta prenosa toplote na posameznem uparilniku. Metoda omogoča tudi obraten pristop. Na osnovi merjenih temperaturnih razlik je mogoče simulirati debelino obloge, kajti le ta ima največji vpliv na ΔT. Tako smo določili učinek vpliva oblog na delovanje uparilnikov ter spoznali, da je nujno njihovo redno odstranjevanje. Izdelani model je omogočil optimirati proces in določiti metode za spremljanje obratovanja kakor tudi določiti ukrepe za njihovo izboljšanje. Po skoraj osmih letih proces še vedno uspešno obratuje.
Keywords:kemijsko inženirstvo, uparjanje v silikatni tehnologiji, proizvodnja glinice iz boksita, uparilniki, optimiranje procesov, prenos toplote, toplotni tok, empirične enačbe, koeficienti prenosa toplote, zeoliti


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