Electric Power ›› 2012, Vol. 45 ›› Issue (4): 59-63.DOI: 10.11930/j.issn.1004-9649.2012.4.59.4

• Generation Technology • Previous Articles     Next Articles

Blowpipe technology of once through boiler in 660 MW ultra-supercritical unit

XIA Yong-jun, CHEN Lin-guo, ZHU Yun-peng, JIANG Wei-guo   

  1. Jiangxi Electric Power Science Research Institute, Nanchang 330096, China
  • Received:2011-10-26 Revised:2012-02-05 Online:2012-04-18 Published:2016-02-29

Abstract: According to engineering practice, the blowpipe technology and control difficulty of once through boiler in 660 MW ultra-supercritical unit were summarized. Two blowpipe technologies with pressure-stabilizing method and pressure-reducing method were expounded separately. The pressure-reducing methods with boiler water circulation pump and without boiler water circulation pump were analyzed. The practice shows that when auxiliary equipments reach the condition of blowpipe, the pressure-stabilizing method was easier to control than pressure-reducing method, the inspection standard of the two methods was same, and there were no obvious differences of the effect between the two methods. The results have practical guidance significance for the future engineering practices.

Key words: ultra-supercritical, once through boiler, pressure-stabilizing blowpipe, pressure-reducing blowpipe

CLC Number: