کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
646251 884560 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of ash deposits characteristics of co-combustion of coal and rice hull using a digital image technique
ترجمه فارسی عنوان
بررسی تجربی خصوصیات رسوبات خاکستر از احتراق همزمان ذغال سنگ و برنج با استفاده از تکنیک تصویر دیجیتالی
کلمات کلیدی
سپرده خاکستری، احتراق همگانی، پوست برنج، تکنیک تصویر دیجیتال، پروب رسوب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Digital image technique was used to monitor deposits growth process.
• A type of four stages mode of ash deposit growth was presented.
• The heat flux of ash deposits fit a three-stage mode.
• The addition of rice hull increased the porosity of deposits.

This paper investigated the ash deposit characteristics during the co-firing Da Tong (DA) coal with different proportions of rice hull (0%, 5%, 10%, and 20%, based on weight) in a pilot-scale furnace. The growth of ash deposit with a four-stage mode was presented. The stable thickness values of DA coal, 5% rice hull, 10% rice hull, and 20% rice hull were 0.5, 1.4, 2.9, 5.7 cm, with stable heat flux values of 230, 200, 175, and 125 kW/m2, respectively. According to the results of scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX), the amount of Si in the deposits increased with the increasing proportion of rice hull rich in SiO2. The X-ray diffraction (XRD) analysis results indicated that most elements except Si were in the amorphous state because of the formation of eutectics. The stable thicknesses of deposits increased exponentially with the proportion of rice hull. The deposit was loose, easy removable but it reduced the heat transfer significantly. Consequently, sootblowing timely was necessary when co-firing DA coal with rice hull.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 70, Issue 1, 5 September 2014, Pages 77–89
نویسندگان
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