| 4.2 MW燃煤热风炉换热器壁温计算方法研究 |
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| 引用本文： | 赵斌,刘景新. 4.2 MW燃煤热风炉换热器壁温计算方法研究[J]. 工业加热, 2007, 36(2): 25-27 |
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| 作者姓名： | 赵斌 刘景新 |
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| 作者单位： | 1. 河北理工大学,河北,唐山,063009
2. 唐山市特种设备检验研究所,河北,唐山,063000 |
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| 摘 要： | 推导了烟气在管内流动、均匀受热管壁的壁温计算公式,分析得出,影响壁温的主要因素是烟气温度和表面传热系数。降低管壁温度的有效方法是降低烟气温度,即在受热面前的高温烟气中混入冷烟气或冷空气,对降低壁温的两种方法进行了比较。研究了热风炉计算中过量空气系数、再循环系数的确定方法及热风炉对风温变化的适应性。
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| 关 键 词： | 热风炉 换热器 壁温 过量空气系数 烟气再循环系数 |
| 文章编号： | 1002-1639(2007)02-0025-03 |
| 修稿时间： | 2006-10-31 |
Research on Wall Temperature Calculation Method for Heat Exchanger of 4.2 MW Coal-fired Hot Blast Furnace |
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| ZHAO Bin,LIU Jing-xin. Research on Wall Temperature Calculation Method for Heat Exchanger of 4.2 MW Coal-fired Hot Blast Furnace[J]. Industrial Heating, 2007, 36(2): 25-27 |
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| Authors: | ZHAO Bin LIU Jing-xin |
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| Affiliation: | 1. Hebei Polytechnic University, Tangshan 063009, China; 2. Tangshan Research Institute of Special Equipment Inspection, Tangshan 063000, China |
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| Abstract: | Wall temperature calculation formula of the tube is derivate, with fume flowing in and heated uniformly. It is founded that the fume temperature and heat liberation coefficient are the main factors that affect tube wall temperature. The viable manner to bring down the tube wall temperature is to reduce fume temperature, that is, putting cold fume or cold air into hot fume in front of heat-exchanger surface. The two methods are compared. The method of confirming excess air coefficient, are recycle coefficient during the hot blast furnace calculation are studied. At the same time, the adaptability of hot blast furnace is studied when air temperature varies. |
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| Keywords: | hot blast furnace heat exchanger wall temperature excess air coefficient fume recycle coefficient |
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