Improvement of Oil Agglomeration of Ilgin Lignite Coal by Ultrasonic Prosess

Year 2024, , 107 - 117, 28.03.2024

Kiraz Eşmeli

https://doi.org/10.21605/cukurovaumfd.1459397

Abstract

In this study, the effect of the ultrasonic system on the oil agglomeration of lignite coal in the presence of waste sunflower oil was investigated. The effect of the power values and application time of the ultrasonic device on the ash content and combustible yield values of the coal suspension was determined. In this context, increasing the power value of the ultrasonic system had a positive effect on the ash values while negatively affecting the combustible yield values. The decrease in ash content was attributed to the cavitation effect of the ultrasonic device, while the decrease in combustible yield was attributed to changes in coal surfaces caused by the ultrasonic device, especially in terms of particle size. Additionally, applying the ultrasonic device for specific durations (1-3 min.) reduced the ash content and increased the combustible yield values. The best results were obtained with 90-Watt power value of ultrasonic process and 3 min. application time. Under optimal conditions, coal with an ash content of 18.39% was obtained with an efficiency of 55.59% in conventional experiments, while coal with an ash content of 10,02% with ultrasound pretreatment was obtained with an efficiency of 64.59%. These results showed that ultrasound pretreatment was an effective method for the enrichment of fine particle coal.

Keywords

Lignite, Ultrasound process, Oil agglomeration

Ilgın Linyit Kömürünün Yağ Aglomerasyonunun Ultrasonik Proses ile İyileştirilmesi

Abstract

Bu çalışmada, ultrasonik sistemin ılgın linyit kömürünün yağ aglomerasyonu üzerine etkisi incelenmiştir. Ultrasonik cihazının uygulanma güç değerleri ve süresinin kömür süspansiyonunun kül içeriği ve yanabilir verim değerleri üzerindeki etkisi belirlenmiştir. Bu bağlamda ultrasonik sistemin güç değerinin artması kül değerleri üzerinde olumlu bir etki yaratırken, yanabilir verim değerlerini ise negatif yönde etkilemiştir. Kül içeriğindeki azalma ultrasonik cihazın kavitasyon etkisine bağlanırken, yanabilir verimdeki azalma ultrasonik cihazın kömür yüzeylerinde yarattığı değişime bağlanmıştır. Ayrıca, ultrasonik cihazın belirli bir sürelerde uygulanması (1-3 dakika) kül içeriğini azaltmış, yanabilir verim değerlerini artırmıştır. En iyi sonuçlar ultrasonik işlemin 90 Watt güç değerinde ve 3 dakika uygulanma süresi ile elde edilmiştir. Optimum koşullar altında, geleneksel deneylerde %55,59 verimlilikle %18,39 kül içeriğine sahip kömür elde edilirken, ultrason ön işlemiyle%10,02 kül içeriğine sahip kömür %64,59 verimlilikle elde edilmiştir. Bu sonuçlar, ultrasonik ön işlemin ince taneli kömürün zenginleştirilmesinde etkili bir yöntem olabileceğini göstermiştir.

Keywords

Linyit, Ultrasonik işlem, Yağ aglomerasyonu

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