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.

 

　　

　　本發(fā)明公開(kāi)了一種脫硫煙氣對(duì)煙囪腐蝕程度的測(cè)定方法，其特征在于該方法使用紅外熱像儀對(duì)煙囪腐蝕程度進(jìn)行檢測(cè)，該方法由以下步驟組成：（1）根據(jù)煙囪溫控裝置確定煙囪的內(nèi)部溫度ti;（2）通過(guò)溫度計(jì)實(shí)測(cè)煙囪的外部空氣溫度t0和通過(guò)紅外熱像儀實(shí)測(cè)煙囪的外表面溫度two;（3）根據(jù)煙囪的材料組成及厚度確定煙囪壁的總熱阻R0;（4）在煙囪壁的某個(gè)區(qū)段的熱像圖中，找出溫度均勻的部分作為參考區(qū)，通過(guò)公式計(jì)算出煙囪壁的外表面換熱阻Rw;（5）對(duì)個(gè)別溫度異常點(diǎn)計(jì)算其熱阻R01,根據(jù)熱阻的變化推算煙囪內(nèi)壁的腐蝕厚度。本發(fā)明使用紅外熱像儀檢測(cè)煙囪，在其測(cè)試出這種溫度變化后，可以推斷出被測(cè)物體內(nèi)部是否存在缺陷以及缺陷范圍的大小。