超临界机组采用直接干式冷却系统的可行性及经济性探讨

AN APPROACH TO FEASIBILITY AND ECONOMIC BEHAVIOR OF ADOPTING DIRECT DRY TYPE COOLING SYSTEM FOR SUPERCRITICAL UNITS

超临界机组及直接干式冷却系统在节煤和节水方面各有着十分显著的效果。阐述了我国超临界机组和大容量直接干式冷却系统的发展现状,结合超临界机组和直接干式冷却系统的特点,从锅炉、汽轮机、干式冷却系统及其它相关系统等方面对超临界机组采用直接干式冷却系统的可行性进行了分析,对干式冷却系统与湿式冷却塔系统的节水指标进行了比较,提出了发展超临界直接空冷机组应注意的问题。

Supercritical unit and direct dry type cooling system each has remarkable effect in coal - saving and water-saving aspects, the present situation of developing supercritical units and large - capacity direct dry type cooling system in our country being expouded. Combined with features of supercritical unit and of direct dry type cooling system, the feasibility of adopting the direct dry type cooling system to supercritical units has been analysed from aspects of boiler, steam turbine, dry type cooling system, and other related systems. The water - saving indices of dry type cooling system and of wet type cooling tower system have been compared, and problems needing to pay attention for developing supercritical units with direct dry type air cooling systems being put forward.