Prediction of unburned carbon in bottom ash in terms of moisture content and sieve analysis of coal

Pulverized fuel combustion should be efficient in terms of power generation, resulting in less unburned carbon (UBC) in ash. In this study, three types of samples from stockyard, coalfeeders to mills, and bottom ash (BA) were taken from a local thermal power plant for 12 days. Proximate analysis of stockyard coal (sub-bituminous) resulted as 9.57% ash, 37.14% volatile matter, 52.91% fixed carbon, and a gross calorific value of 6640 kcal/kg. Petrographic analysis of coal showed that more than 80% consisted of reactive macerals. Coal from coalfeeders was also analyzed in terms of moisture content and sieve analysis. BA samples were analyzed and UBC content of BA over a 12 day period changes between 0.49 and 0.71% for Unit 1 and 0.26 to 0.69% for Unit 2. A relationship was seen between the moisture content and size distribution of coal from the mill inlet with UBC in the BA. A modified population model was used to estimate UBC as a function of size distribution, moisture content, mill environment constant, boiler environment constant, and residence time. A population model was used because the grinding and combustion operations are similar in terms of formation of new particles. It is seen that the model proposed is in agreement with the experimental results. In conclusion, in order to lower the amount of UBC in ash, the size distribution and moisture content of feed coal to mills should be stabilized. © 2015 Elsevier B.V. All rights reserved.

Yazar Bilen M.
Kizgut S.
Akkaya B.
Yayın Türü Article
Tek Biçim Adres https://hdl.handle.net/20.500.12628/7118
Tek Biçim Adres 10.1016/j.fuproc.2015.06.010
Konu Başlıkları Bottom ash
Population model
Size reduction
UBC
Koleksiyonlar Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu
Dergi Adı Fuel Processing Technology
Dergi Cilt Bilgisi 138
Sayfalar 236 - 242
Yayın Yılı 2015
Eser Adı
[dc.title]
Prediction of unburned carbon in bottom ash in terms of moisture content and sieve analysis of coal
Yazar
[dc.contributor.author]
Bilen M.
Yazar
[dc.contributor.author]
Kizgut S.
Yazar
[dc.contributor.author]
Akkaya B.
Yayın Yılı
[dc.date.issued]
2015
Yayıncı
[dc.publisher]
Elsevier
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Pulverized fuel combustion should be efficient in terms of power generation, resulting in less unburned carbon (UBC) in ash. In this study, three types of samples from stockyard, coalfeeders to mills, and bottom ash (BA) were taken from a local thermal power plant for 12 days. Proximate analysis of stockyard coal (sub-bituminous) resulted as 9.57% ash, 37.14% volatile matter, 52.91% fixed carbon, and a gross calorific value of 6640 kcal/kg. Petrographic analysis of coal showed that more than 80% consisted of reactive macerals. Coal from coalfeeders was also analyzed in terms of moisture content and sieve analysis. BA samples were analyzed and UBC content of BA over a 12 day period changes between 0.49 and 0.71% for Unit 1 and 0.26 to 0.69% for Unit 2. A relationship was seen between the moisture content and size distribution of coal from the mill inlet with UBC in the BA. A modified population model was used to estimate UBC as a function of size distribution, moisture content, mill environment constant, boiler environment constant, and residence time. A population model was used because the grinding and combustion operations are similar in terms of formation of new particles. It is seen that the model proposed is in agreement with the experimental results. In conclusion, in order to lower the amount of UBC in ash, the size distribution and moisture content of feed coal to mills should be stabilized. © 2015 Elsevier B.V. All rights reserved.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Bottom ash
Konu Başlıkları
[dc.subject]
Population model
Konu Başlıkları
[dc.subject]
Size reduction
Konu Başlıkları
[dc.subject]
UBC
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
0378-3820
İlk Sayfa Sayısı
[dc.identifier.startpage]
236
Son Sayfa Sayısı
[dc.identifier.endpage]
242
Dergi Adı
[dc.relation.journal]
Fuel Processing Technology
Dergi Cilt Bilgisi
[dc.identifier.volume]
138
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1016/j.fuproc.2015.06.010
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/7118
Görüntülenme Sayısı ( Şehir )
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Görüntülenme Sayısı ( Zaman Dağılımı )
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7
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
08 Şubat 2024 06:42
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content moisture distribution analysis population environment analyzed carbon combustion should between constant samples stockyard coalfeeders relationship modified estimate function boiler Pulverized residence reserved rights Elsevier stabilized amount conclusion results experimental agreement proposed particles formation similar
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