基于水冷壁壁温的炉膛火焰中心位置预测方法

Forecasting of Flame Center Position in the Furnace Based on Water Wall Temperature of the Boiler

根据炉内辐射传热原理,提出一种基于锅炉水冷壁壁温的炉膛火焰中心位置预测方法。以某600 MW超临界墙式切圆锅炉为例,建立火焰中心预测模型,进行75%BMCR工况下火焰中心位置的预测,并与现场实际数据进行了比较。结果表明:下部水冷壁出口壁温与炉膛火焰中心位置的偏移量可建立关联模型;根据水冷壁壁温的变化可完成火焰中心位置的预测;该预测方法仅需利用锅炉已有测点,投资低、预测过程简单可靠,工程实用性强。

According to the principle of radiation heat transmission in the furnace,a method was proposed for the prediction of flame center position based on water wall temperature of the boiler.Taking a 600 MW supercritical tangentially fired boiler as an example,the position of flame center was predicted under 75% BMCR condition, and the prediction data were subsequently compared with actual measurements.Results show that a correlation model can be built between the outlet temperature of lower water wall and the offset of flame center position.According to the change rule of water wall temperature,the position of flame centre can be predicted.Featured by low investment,high prediction accuracy and simple prediction process,the method proposed has wide application prospects in engineering projects,since it only requires the measuring points already existing in the boiler.