论文部分内容阅读
针对锅炉水冷壁局部灰污监测这一难点问题,引入了新的清洁因子,将此问题转化为声学测温问题。开发研制了水冷壁局部灰污在线监测系统,并在国内某300 MW锅炉上进行了试验研究,取得了水冷壁贴壁声线上的烟气温度,重建了锅炉炉膛截面温度场。研究表明:新的清洁因子可以用来监测水冷壁局部灰污状况;由于声波弯曲效应,测得的贴壁声线的平均烟气温度比水冷壁向火测温度高130℃左右,贴壁烟温的变化可以用其来代表水冷壁壁温的变化;重建的温度场可以实时准确地观测火焰中心在炉内的移动;为锅炉灰污监测和智能吹灰提供重要的参考。
Aiming at the difficult problem of local monitoring of ash in boiler water wall, a new cleaning factor was introduced to convert this problem into acoustic temperature measurement problem. The local gray line monitoring system for water wall was developed and developed. The experiment was conducted on a 300 MW boiler in China. The flue gas temperature on the attached wall of the water wall was obtained and the temperature field of the boiler section was reconstructed. The results show that the new cleaning factor can be used to monitor the local gray condition of the water wall. Because of the bending effect of the sound wave, the average flue gas temperature of the attached sound ray is about 130 ℃ higher than that of the water wall. The change of temperature can be used to represent the change of wall temperature of water wall. The reconstructed temperature field can observe the movement of flame center in the furnace in real time. It provides an important reference for boiler ash monitoring and intelligent soot blowing.