مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بهینه‌سازی مشعل سیستم احتراق کارخانه‌های آجرپزی هافمن

نوع مقاله : پژوهشی اصیل

نویسندگان
1 گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه گلستان، گرگان، ایران
2 گروه مهندسی شیمی، دانشکده مهندسی شیمی و مواد، دانشگاه صنعتی شاهرود، شاهرود، ایران
چکیده
سیستم احتراقی که در کوره‌های هافمن کارخانه‌های آجرپزی استفاده می‌شود، بازدهی بسیار پایینی دارد. در این مقاله، با انجام شبیه‌سازی دینامیک سیالات مولکولی با ایجاد تغییرات در مشعل کوره هافمن کارخانه آجر کلت شامل همگراکردن سرمشعل، قراردادن فنر در لوله برای ایجاد جریان چرخشی، کوتاه‌کردن طول نازل سوخت مشعل برای اختلاط بهتر سوخت و هوا و موارد دیگر، عملکرد سیستم احتراقی مشعل کارخانه‌های آجرپزی هافمن بهبود داده شده است. تغییرات در هر مرحله با نرم‌افزار FLUENT شبیه‌سازی شد. براساس نتایج تئوری و شبیه‌سازی، مشعل بهینه‌شده ساخته شد و در یک کارخانه آجر روی آن آزمون میدانی انجام گرفت و گازهای حاصل از احتراق آنها تحلیل شد. در نتیجه این اصلاحات، راندمان احتراق مشعل کوره هافمن از ۲۷ به ۴۷% افزایش پیدا کرده و مصرف سوخت تا یک‌سوم کاهش یافته است. همچنین مقدار CO از ppm۱۶۸۵۴ در مشعل قدیمی به ppm۲۹۸ در مشعل بهینه‌شده و مقدار NO از ۴۹ به ppm۱۸ در نتیجه بهینه‌سازی‌ها کاهش یافته است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Optimization of Combustion Burner at Hoffman Brick Factories

نویسندگان English

N. Hajilary 1
M. Rezakazemi 2
1 Chemical Engineering Department, Engineering Faculty, Golestan University, Gorgan, Iran
2 Department of Chemical Engineering, Faculty of Chemical & Materials Engineering, Shahrood University of Technology, Shahrood, Iran
چکیده English

The combustion system used by the Hoffman furnaces for brick factories has a very low efficiency. In the current paper, the performance of the combustion system of Hoffman furnaces of Kolet Pottery Brick Co has improved, using computational fluid dynamics (CFD) by making changes to the Hoffman furnace torch, including the converging the torch head, inserting the spring in the pipe to create the swirl flow, shortening the nozzle length for the better mixing of the fuel and air, and more. The changes were simulated in each step with the FLUENT simulation software. Based on the theoretical results and simulation, optimized torch was made and a field test was carried out on it in a brick factory and the gases from their combustion were analyzed. As a result of these reforms, the combustion efficiency of the Hoffman furnaces has increased from 27% to 47 %, and consumption of fuel oil has decreased by a third. Also, the CO value of 16854 ppm in the old torch was reduced to 298 ppm in the optimized torch and the NO value ranged from 49 to 18 ppm as a result of optimizations.

کلیدواژه‌ها English

Brick Factory
Hoffman Furnace
Burner
energy consumption
Swirl Flow
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