660 MW超临界墙式切圆煤粉锅炉烟温偏差优化控制

摘要

Aiming at the phenomenon of large gas temperature deviation between the left and right side at furnace outlet of a 660 MW supercritical tangentially-fired boiler,numerical simulation was conducted,and subsequently the results were compared with that of experiment.Results show that the simulation data agree well with experimental values,and the gas temperature deviation is found to be caused by residual rotating air flow,which can be reduced by counterclockwise adjusting the SOFA horizontal swing angle,reducing the opening of secondary air damper and increasing the opening of SOFA damper,etc.After taking above measures,the economy and safety of the boiler are improved.%对某电厂660 MW超临界墙式切圆煤粉锅炉炉膛出口烟温偏差过大现象进行了数值模拟,并将模拟结果与试验结果进行了比较.结果表明:模拟结果与试验结果吻合较好;残余旋转气流造成了烟温偏差;将SOFA水平摆角反切、减小二次风挡板开度和增大SOFA挡板开度,均有利于降低炉膛出口烟温偏差;通过采取上述措施,提高了锅炉的经济性与安全性.