کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6636090 461130 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigations into the air heater ash deposit formation in large scale pulverised coal fired boiler
ترجمه فارسی عنوان
تحقیقات در شکل گیری سپرده خاکستر بخاری هوا در دیگ بخار زغال سنگ پالایش شده در مقیاس بزرگ
کلمات کلیدی
خاکستر، گواهی، گرم کننده ی هوا، بویلر، سولفات،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Chemical and mineralogical analysis showed that the deposits are unusual in containing high amounts of sulphate, particularly of aluminium and, to a lesser extent, iron. From the analyses it appears that the formation of the deposits is due to the high sulphate content which is acting as a cementing agent. There is an indication that temperature could be another factor in formation of the deposits, with a decrease in temperature leading to the formation of sulphurous acid which then reacts with the reactive glassy amorphous fly ash phase to form the aluminium and iron sulphates. Dew point calculations indicated that this is a possible deposit formation mechanism based upon the air heater temperature data obtained from the utility. There was no evidence that unburnt carbon has played a significant role in deposit formation. Large temperature fluctuations resulting from the inherent nature of the operation of the air heater are a significant factor in deposit formation and a practical solution to consider would be the use of an SO2 absorbent placed prior to the air heater.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 140, 15 January 2015, Pages 27-33
نویسندگان
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