蓄热式加热炉炉压特性的实验研究

来源期刊：钢铁2009年第7期

论文作者：谢国威 蔡九菊 孙文强 李中军

文章页码：85 - 89

关键词：蓄热式加热炉； 炉内压力； 结构参数； 操作参数； 辅助烟道

Key words：regenerative heating furnace； furnace pressure； structure parameter； operating parameter； auxiliary flue

摘    要：构建了带有辅助烟道的蓄热式加热炉冷态实验装置,用其研究蓄热式加热炉的结构参数、操作参数和辅助烟道等对炉内压力的影响。实验结果表明:炉气流量、炉气入(出)口的压力和换向方式等操作参数是影响炉内压力及压力分布的重要因素,当减少炉气流量或采用分散换向方式时,整个炉内的压力水平降低且沿炉气流动方向前后压差变小,改变炉气入(出)口的压力将影响整个炉内的压力水平,而不影响炉内的压力分布;炉气入(出)口断面积、炉气横掠炉膛截面积等结构参数是影响炉内压力及压力分布的关键因素,当增大炉气入口断面积与炉气横掠炉膛截面的面积之比时,炉内压力下降且沿炉气流动方向炉压变化减弱;辅助烟道及其大小对炉内压力及压力分布的影响最为明显,增大辅助烟道的通道面积,可有效解决某些大型蓄热式加热炉由炉压偏高所引发的炉门冒火和作业率低等问题。

Abstract: A cold state experimental device concerned with a regenerative reheating furnace is built to study the influences of the operating parameters,the structure parameters and the area of auxiliary flue on the pressure in the furnace.Some conclusions are therefore drawn that the operating parameters such as the gas flux,the pressure at the gas inlet or outlet,and the switch mode are the main influencing factors of the pressure characteristic.Decreasing the gas flux or decentralizing the switches tends to decrease the whole pressure and the pressure difference along the furnace width.The pressure fluctuation at the gas inlet or outlet can only influence the whole pressure along furnace width,but will not make the pressure distribution different in the furnace.However,the structural parameters such as the area of the gas inlet(outlet),the area of the gas inlet,the area of the furnace hearth section,and the area of the auxiliary flue are the key influencing factors of the pressure characteristic.As the area ratio of the gas inlet to the furnace hearth section increases,the furnace pressure is inclined to be lower,and the pressure difference tends to be smaller along the furnace width.It is the auxiliary flue that affects the pressure in the furnace and its distribution remarkably.So the problems caused by high pressure or pressure fluctuation could be resolved for some regenerative heating furnaces by adjusting area of auxiliary flue.