双预热蓄热式环形加热炉炉压控制及换向对炉内压力波动的影响

来源期刊：钢铁2009年第3期

论文作者：潘良明 季洪春 程淑明 伍成波 雍海泉

文章页码：85 - 89

关键词：空煤气双预热蓄热式； 环形加热炉； 燃烧换向； 压力波动； 炉压控制

Key words：air-gas dual regenerative combusting technology； annular furnace； combustion switchover； pressure fluctuation； furnace pressure control

摘    要：蓄热式燃烧技术中,炉压控制和换向时造成的炉压波动是一个非常重要的问题。根据模化理论,发现在各个流量工况下,各段内的压力均可以通过改变各段的鼓风量和排烟量来调节,控制尾部烟道排烟是最佳的控制方法。当加热段段内集中换向时,各段压力波动幅度平均在3~5 Pa;换向周期中,压力最低点均出现在内环鼓风,外环抽风的工况下,而压力最高点则出现在第2加热段第二次换向的过程中;炉压总体波动不大,对加热炉安全运行影响不大。如采用单个烧嘴时序换向,则其对炉压的影响可以降到最低。

Abstract: For HTAC(Hight Temperature Air Combustion) technology,pressure control and pressure fluctuation during combustion switchover are very important to the furnace reliability and stability.According to modeling theory,it was found that the pressure control could be realized by controlling the ratio of blasting capacity and induced draft capacity,and the best way is to control the induced draft of the tail duct.When the heating zones were switched over simultaneously,the average pressure fluctuation were within 3-5 pascals in the whole period,the lowest pressure was observed while outer ring was at blasting and inner ring was at induced draft stage.The highest pressure was observed in No.2 heating zone at the second switchover.The general pressure fluatuation was not high enough to affect the reliability of the furnace.With sequential switchover of all individual burners,the effect on furnace pressure will be minimized.