中国300 MW等级循环流化床锅炉机组与煤粉锅炉机组可靠性对比与分析

为了定量分析中国已经投运的300 MW等级的循环流化床锅炉机组与煤粉锅炉机组在可靠性方面的差异，对中国大部分现役的300 MW等级循环流化床锅炉机组和煤粉锅炉机组可靠性数据进行了统计，分析并比较了两种锅炉机组的综合可靠性指标及停运指标。分析结果表明，尽管循环流化床锅炉机组的可靠性指标有了很大的提高，非计划停运次数由2011年2.48次/（台?年）迅速降低至2014年的不到0.75次/（台?年），强迫停运次数及等效强迫停运率也分别从最高的2011年1.97次/（台?年）及3.7%降至2014年的0.62次/（台?年）及1.18%，但与煤粉锅炉机组相比，非计划停运次数台年均值、强迫停运次数台年均值及等效强迫停运率分别高0.30次、0.20次及0.87%；平均非计划停运间隔小时低6 158.90 h。因此循环流化床锅炉机组的可靠性还需要进一步提高。

Analysis and Comparison on Reliabilities of 300-MW Circulating Fluidized Bed Boiler Units and Pulverized Coal Boiler Units

In order to quantitatively analyze the differences between the reliabilities of the 300-MW class circulating fluidized bed (CFB) boiler units and the pulverized coal(PC) boiler units in China, the statistics on the reliability data of major 300-MW class CFB boiler units and pulverized coal boiler units are conducted, in which the reliability and the outage comprehensive indices are compared. The results show that though the reliability indices of the CFB units have been greatly improved and the number of unplanned outages has been reduced greatly from 2.48 times/(unit?year) in 2011 to less than 0.75 times/(unit?year) in 2014, the forced outage times and the equivalent forced outage rate have been reduced from 1.97 times/(unit?year) and 3.7% in 2011 to 0.62 times/(unit?year) and 1.18% in 2014 respectively, they are still 0.30 times/(unit?year), 0.20 times/(unit?year) and 0.87% higher than the indices of the pulverized coal boiler units in 2014 respectively and the average unplanned outage interval hours are 6 158.90 h less than the pulverized coal boiler units. Therefore, the reliabilities of CFB boiler units need to be further improved.