循环流化床锅炉带负荷能力受限分析及建议

Analysis and Research on Load Limitation of CFB

自2019年6月以来,某电厂2号机组带负荷受限,最大负荷178 MW(满负荷200 MW),7月份最大170 MW,若高于上述最高负荷,吸收塔入口烟气温度会大于170℃,喷淋频繁动作。通过现场测试以及历史曲线数据分析,确定主要原因是排烟温度高和引风机出力调节无余量,同时进行处理并提出建议。

Since June 2019,the load capapcity of the No.2 generating unit of a power plant has been limited.the maximum load of the unit was limited to 178 MW(ralative to 200 MW full load)and to lower 170 MW in July.In condition with load above the limitation,the flue gas temerature at the inlet of the absorption tower will be greater than170℃,result in frequent spraying.Based on field test and historical data analysis,it is found that high exhaust temerature and the lack of induced fan output adjustment space result in the limitation.