三排管直接空冷凝汽器冻结原因

针对山西漳山发电有限责任公司300MW机组发生三排管直接空冷凝汽器冻结问题,分析了三排管直接空冷凝汽器管束冻结的原因,内因是在迎风侧第1排翅片管内蒸汽倒流并有空气聚积,外因是环境温度低。文章阐述了三排管直接空冷凝汽器在设计中所存在的不足及其改进建议,供已投运的三排管直接空冷凝汽器改造和拟建机组设计参考。

Freezing Cause of Three- Row Tube Direct Air Cooling Condenser

In light of the freezing problem occurring in the three-row tube direct air cooling condenser of NO.1 300 MW unit in Shanxi Zhangshan power Generation Corp.Ltd,the paper analyzes the tube bundle freezing canse of three-row tube direct air cooling condenser,the internal canse is:the steam flows backwards and there is air accumulating in the first row finned tubes;the external cause is:the atmosphere temperature is low.The paper expounds the deficiencies existing in the three-row tube direct air cooling condenser and its improvement proposals,providing references for the retrofit and design of such kind condensers.