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ORIGINAL PAPER
The impact of new constructional solutions of pelleting devices on properties of the produced pellets
1
Uniwersytet Przyrodniczy w Lublinie, Wydział Inżynierii Produkcji, ul. Głęboka 28; 20-612 Lublin, Katedra Eksploatacji Maszyn i Zarządzania Procesami Produkcyjnymi
2
Uniwersytet Przyrodniczy w Lublinie, Wydział Inżynierii Produkcji, ul. Głęboka 28; 20-612 Lublin, Katedra Maszyn Ogrodniczych i Leśnych
3
Uniwersytet Przyrodniczy w Lublinie, Wydział Inżynierii Produkcji, ul. Głęboka 28; 20-612 Lublin, Katedra Maszynoznawstwa Rolniczego
Journal of Research and Applications in Agricultural Engineering 2016;61(2):35-39
KEYWORDS
ABSTRACT
The paper presents results of study of the pellets made of agricultural biomass. In the tests wheat straw was used and then ground raw materials were concentrated using two types of pelleting machines: with flat matrix and driven by compacting rollers as well as with ring matrix. The research methodology consisted of measurements of physicochemical properties of pellets, i.e. humidity after compaction, bulk density, and mechanical stability factor. Calorific value, ash content, and chemical composition of the raw material were also specified. Average humidity of the raw material ranged from 10.30% for ring press to 10.77% for flat press. The pelleting process changed the water content in a final product causing statistically significant differences between pelleting devices applied. The bulk density of pellets in both machines did not differ considerably and amounted to 541.77 kg·m-3 for ring press and to 544.21 kg·m-3 for flat press. Calorific value of the produced pellet in both cases was above 15 MJ·kg-1. Applying new constructional solutions in a form of two pelleting device types, allowed for obtaining product that was characterized by high mechanical durability greater than 95%.
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