红外热成像仪在球团回转窑生产状态监测中的应用

Application of Infrared Thermal Imager in Monitoring the Production Status of Pellet Rotary Kiln

回转窑作为冶金球团生产的主要设备,其内部温度及设备安全状况难以通过直接测量得到。通过在窑外安装红外热成像仪,对回转窑表面温度进行监测,实现了对其点火、升温、正常生产时的温度状态和红窑风险的分析。结果表明:红外热成像仪可精准监测回转窑表面温度,温度采集密度可达2.4 cm,测温精度可达±5℃;回转窑点火升温过程中,由于火焰辐射传热范围有限,窑尾附近的升温具有滞后性;在回转窑稳定生产时,窑中部位窑皮温度在320℃左右,窑尾部位窑皮温度在250℃左右,说明设备耐材状态良好,暂无红窑风险。

As the main equipment for metallurgical pellet production,the internal temperature and equipment safety condition of rotary kilns are difficult to obtain through direct measurement.By installing an infrared thermal imager outside the kiln,the surface temperature of the rotary kiln was monitored,and the analysis of its ignition,temperature rise,normal production temperature status,and red kiln risk was achieved.The results show that the infrared thermal imager can accurately monitor the surface temperature of the rotary kiln,with a temperature acquisition density of up to 2.4 cm and a temperature measurement accuracy of±5℃.During the ignition and heating process of the rotary kiln,due to the limited range of flame radiation heat transfer,the temperature rise near the kiln tail has a lag effect.When the rotary kiln is in stable production,the temperature of the kiln skin in the middle part of the kiln is around 320℃,and the temperature of the kiln skin at the tail part is around 250℃,indicating that the equipment is in good material resistance and there is currently no risk of red kiln.