论文部分内容阅读
某集团公司自备热电厂5#、6#锅炉在2010年11月的停炉内部检验中,发现尾部垂直烟道内省煤器各级蛇形管均出现变形,其中省煤器高温段蛇形管变形严重。因该类锅炉省煤器蛇形管如此大面积严重变形并不多见,况且省煤器常见失效原因多为管子内部氧腐蚀穿孔、管外侧局部磨损及低温硫腐蚀等,遂就两炉省煤器变形产生的原因加以分析,并提出相关预防对策。1 5#、6#锅炉概况1)5#、6#炉系中温、中压层燃(链条)炉,其型号及参数如下:NGG-35/3.82/450-AⅡ,额定蒸发量35t/h,额定蒸汽压力3.82MPa,额定蒸汽温度450℃,给水温度150℃。2005年3月安装竣工后投入使用,至本次停炉内检时的实际运行小时数为25000h左右,本次内检为第二次,2007年底至2008年底因受供汽富裕影响停用1年,因集团公司供热负荷增加,2008年底又恢复投用。
During the internal shutdown shutdown test of No.5 and No.6 boilers owned by a group company in the thermal power plant, it was found that all the serpentine tubes in the tail vertical flue economizer were deformed, of which the economizer serpentine tube Deformation serious. Because of such boiler economizer serpentine pipe so large area serious deformation and rare, and the economizer common causes of failure are mostly internal corrosion of the pipe perforation, pipe outside the local wear and low temperature sulfur corrosion, etc., then the two furnaces Analysis of the causes of coal deformation and put forward relevant preventive measures. 1 5 #, 6 # boiler 1) 5 #, 6 # furnace temperature, medium pressure layer burning (chain) furnace, the model and parameters are as follows: NGG-35 / 3.82 / 450-A Ⅱ, the rated evaporation of 35t / h , Rated steam pressure 3.82MPa, rated steam temperature 450 ℃, water temperature 150 ℃. March 2005 after the completion of the installation put into use, until the shutdown of the actual operating hours when the shutdown was about 25000h, the second test for the second time by the end of 2007 to the end of 2008 due to the rich affected by the disabled 1 In the year, due to the increase of heating load of the Group Company, it was put into operation by the end of 2008.