diplomsko delo
Benjamin Cerkvenik (Author), Matjaž Hriberšek (Mentor), Zoran Ren (Co-mentor)

Abstract

Pri sušilniku z lebdečim slojem vpihujemo sušilni zrak skozi mrežo in skozi vlažen zrnat material, ki se nahaja v sušilniku. Hitrost zraka, s katerim sušimo, mora biti dovolj velika, da se material, ki ga želimo osušiti, dvigne in začne obnašati kot tekočina. Padec tlaka v sušilnem zraku pri prehodu skozi lebdeči sloj je enak približni teži materiala na enoto površine. Za razumevanje in optimiziranje sušenja moramo poznati tokovno polje zraka v sušilniku, saj je od tega odvisen prenos toplote in snovi med delci. Razmere v lebdečem sloju so izotermne zaradi visoke stopnje mešanja delcev, torej ni velikih temperaturnih nihanj. Od tod sledi, da se lebdeča snov suši enakomerno. Snov je v obliki prašnih delcev. Komora, v kateri se nahaja vlažni material, je pod majhnim kotom in lahko vsebuje vibrirajoče ploščice, ki nam pomagajo pri lepljivih materialih. Po končanem sušenju vodimo material iz sušilnika na vibracijsko sito, kjer odstranimo nezaželene grobe delce, ki jih pozneje vodimo v fazo recikliranja. Preostali delci, ki so primerni za uporabo, pa napolnijo vreče, ki jih pripravimo za transport do končnih uporabnikov.

Keywords

sušenje;sušilniki;lebdeči sloj;sušenje prašnih delcev;pretok zraka;sušilni zrak;merjenje pretoka;optimizacija procesa sušenja;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [B. Cerkvenik]
UDC: 621.762:669.3.047(043.2)
COBISS: 17073174 Link will open in a new window
Views: 1269
Downloads: 86
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Other data

Secondary language: English
Secondary title: Drying of blue vitriol
Secondary abstract: In a dryer with a fluid bed air is blown through the net and through the moist granular material, which is located in the dryer. Air velocity must be high enough, in order to the material that you want to dry rises and begins to behave like a fluid. Pressure drops when the drying air in passing through the floating layer equals approximately the weight of the material per unit area. To understand and optimize the drying process, we should be familiar with the air flow field in the dryer, because it influences the heat and mass transfer between particles. Conditions are isothermal, because of high rates of mixing particles, so there are no large temperature fluctuations. From here it follows that the suspended matter dries evenly. Substance is in the form of dust particles. The chamber in which there is a wet material is at a low angle, and may contain vibrant tiles that help us with sticky materials. After the drying the material is collected from the oven on a vibrating sieve. That removes unwanted coarse particles, because they are not suitable for use. The remaining particles, which are suitable for use, fill the bags and are prepared for transport to customers.
Secondary keywords: drying;dryers;fluid bed dryer;drying air flow;flow measurement;optimization;
URN: URN:SI:UM:
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo
Pages: X, 28 f.
ID: 8724823