2001, vol. 26, iss. 1-4, pp. 11-24
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An estimate of coal blend ashes tendency to the fouling and slogging of boilers heating surfaces
Ocena sklonosti pepela mešavine ugljeva na prljanje i zašljakivanje kotlovskih grejnih površina
University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča
Ključne reči: mešavine uglja; zaprljanje; zašljakivanje; temperature topljenja pepela
Abstract
Results of investigation of coal blends, originated from different fields of Kolubaras' basin with different coals mass portions in the blends are presented. Laboratorial investigation of three coal samples taken from two fields of Kolubaras' basin, "Tamnava-east field" west part of basin (MA, with higher heating value), "Tamnava-east field" west part of basin (MB, with lower heating value) and "Field D"-east part of basin (MD), were done. Also, an estimate of ash tendency to the slagging by application of base/acid ratio-ash fusion temperature criteria, which is successfully used in characterization of domestic coals, was done. It is also presented that chemical and physical characteristics of coals blend are additive values of coals while tendency of fusibility is not additive value.
Sažetak
U ovom radu su prikazani rezultati ispitivanja fizičkih i kemijskih osobina mešavina ugljeva sa različitih kopova kolubarskog basena, sa različitim masenim udelima ugljeva u mešavinama. Urađena su laboratorijska ispitivanja tri uzorka uglja, sa dva polja kolubarskog basena, i to: „ Tamnava-Istočno Polje" - zapadni deo basena (MA, više toplotne moći), „Tamnava-Istočno Polje" - zapadni deo basena (MB, niže toplotne moći), i „Polje D"- istočni deo basena (MD). Takođe, izvršena je i ocena sklonosti pepela ka zašljakivanju primenom kriterijuma bazni broj - temperatura topivosti koji dobro opisuje domaće ugljeve. Takođe je pokazano da su kemijske i fizičke osobine mešavina aditivne veličine ugljeva koji čine mešavine dok sklonost ka zašljakivanju nije aditivna veličina.
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