窑尾系统联接管道内烟气测温误差的分析

对五种热电偶，特别是双层遮热罩热电偶对窑尾系统联接管道内烟气测温误差的计算方法进行了推导。根据计算的需要，由联接管道外壁温度计算出了其内壁温度。计算了五种类型热电偶在窑尾系统各联接管道位置的烟气测温相对误差δ，并与相关计算和实测结果进行了对比。对热电偶测温误差的主要影响因素进行了简单计算分析。分析结果显示，使用热电偶对窑尾联接管道内烟气进行测温时的读数一般比实际值偏小，各种样式热电偶测温的相对误差范围：普通式为7.20%~16.39%，单层遮热罩式为0.69%~6.34%，单层遮热罩抽气式为0.46%~5.23%，双层遮热罩式为0.07%~2.68%，双层遮热罩抽气式为0.04%~2.01%。相比普通热电偶，遮热罩抽气式热电偶的测温准确性大幅度提高。最后对实际生产中热电偶的选配提出了合理建议。

Error analysis of flue gas temperature measurement in connecting pipe of kiln end system

By means of research method of technology roadmap and based on the former work of investigation and research,the essential factors of technology barriers and research demand in different stages for low carbon technology of cement industry were put in order and analyzed in accordance with their importance.Then the correlations between essential factors of technology barriers and industry objective were studied in order to clear and definite the key point of the general character of technological problems for carbon reduction of cement industry.