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一、高温内燃式热风炉的发展当前国内90%以上的高炉系采用传统的内燃式热风炉,风温900—1050℃。当超过1100℃时产生严重破损,其原因主要是燃烧室结构不合理,在燃烧室与蓄热室之间的隔墙两侧产生自上而下逐渐增大的温度差,并由此产生温差应力,使用风温愈高,其值愈大;加之金属燃烧器高温火焰分布不均,导致燃烧室周向温度分布很不均匀,燃烧室上部温度隔墙侧远远大于大墙侧;燃烧不良容易产生脉动现象。温差应力与砌体自身压应
First, the development of high temperature internal combustion hot stove At present, more than 90% of the domestic blast furnace system uses a traditional internal combustion hot stove, air temperature 900-1050 ℃. When it exceeds 1100 ℃, it will cause serious damage. The main reason is that the structure of the combustion chamber is unreasonable, a temperature difference increases from top to bottom on both sides of the partition wall between the combustion chamber and the regenerator, and the temperature difference Stress, the higher the use of air temperature, the greater its value; combined with metal burner uneven distribution of high temperature flame, resulting in uneven distribution of temperature in the combustion chamber circumference, the upper part of the temperature chamber wall is much larger than the wall temperature; poor combustion Easy to produce pulsation. Thermal Stress and Masonry Pressure