首台国产210MW循环流化床锅炉运行问题及改进措施

Operating Experience of the First Domestically-made 210MW CFB Boiler

介绍了首台国产210MW循环流化床(CFB)锅炉的设计特点,分析了锅炉调试及试运行过程中遇到的主要技术问题,如:空预器联通罩变形外鼓、中温省煤器后墙设计强度不够、低温再热器出口汽温超温等。通过改进空预器联通罩隔板、加固省煤器后墙、调整再热器受热面、在分离器入口烟道处加装吹灰装置、分离器立管结焦处理后上述问题得到解决。运行实践表明,该台锅炉消缺后各项性能参数均达到设计值,运行性能良好。特别是国内首次采用的紧凑式分流回灰换热器经受了考验,运行稳定、调节方便可靠、运行控制性能优异。

The paper briefed the design features of the First domestic 210 MW circulatmg fluidiTed bed（CFB）boiler, and analyzed the main technical problems met during the commissioning process,such as：deforming - buldging of interconnecting cover of air preheater, insufficient design strength of the rear wall of intermediate temperature economizer, and overtemperature of the outlet steam of low temperature reheater etc.Through improving the interconnecting cover baffle of air preheater,strengthening the rear wall of economizer, adjusting the heating surface of reheater,installing the soot blower at the inlet gas duct of separator and resolving the slagging of vertical pipe of separator etc.,the problems mentioned above; were resolved. Operating results show that, after retrofitting, all the performance parameters of boiler have reached the design values and the boiler has good Operating performance.In particular,the compact ash-flow spliting and heat exchanger（CHE） applied first at home has stood up to all tests,operated stably,regulation is convenient and reliable and operation control performance is excellent.