The invention discloses a measuring method of corrosion degree of desulfuration flue gas to a chimney. The method is characterized by detecting the corrosion degree of the chimney through a thermal infrared imager, and comprises the following steps that （1） an internal temperature ti of the chimney is confirmed according to a chimney temperature control device; （2） an external air temperature t0 of the chimney is measured actually by a thermometer; an external surface temperature tw0 of the chimney is measured actually by the thermal infrared imager; （3） entire thermal resistance R0 of walls of the chimney is confirmed according to material composition and thickness of the chimney; （4） a uniform temperature part is found out from a thermogram of a certain section of the walls of the chimney to serve as a reference area; external surface thermal exchange resistance Rw of the walls of the chimney is computed by a formula; and （5） thermal resistance R01 of an individual abnormal temperature point is computed; and the corrosion thickness of the internal wall of the chimney is computed according to variation of the thermal resistance. The method detects the chimney by utilizing the thermal infrared imager, and can infer whether defects exist in a detected object, and the magnitude of a defect range after temperature variation is tested.

 

　　

　　本发明公开了一种脱硫烟气对烟囱腐蚀程度的测定方法，其特征在于该方法使用红外热像仪对烟囱腐蚀程度进行检测，该方法由以下步骤组成：（1）根据烟囱温控装置确定烟囱的内部温度ti;（2）通过温度计实测烟囱的外部空气温度t0和通过红外热像仪实测烟囱的外表面温度two;（3）根据烟囱的材料组成及厚度确定烟囱壁的总热阻R0;（4）在烟囱壁的某个区段的热像图中，找出温度均匀的部分作为参考区，通过公式计算出烟囱壁的外表面换热阻Rw;（5）对个别温度异常点计算其热阻R01,根据热阻的变化推算烟囱内壁的腐蚀厚度。本发明使用红外热像仪检测烟囱，在其测试出这种温度变化后，可以推断出被测物体内部是否存在缺陷以及缺陷范围的大小。