摘要
提出了湿冷火电厂冷却塔建立热力塔发电系统以利用废热和回收水的建议,对此进行了全面的热力学分析与计算。计算表明,热力塔不仅能够利用湿冷电厂的余热进行发电,而且通过在热力塔内安装汽水分离装置和在塔顶安装水回收装置能够起到水回收的作用。在一定的高度和环境温度范围内,热力塔的效率随着塔高的增加而增加,但随着涡轮入口温度的增高有一最大值。当塔高2000m、环境温度为15℃、涡轮进口温度为25℃时,热力塔系统能够增加2×600和2×1000MW机组电厂的发电容量分别达到25.11和37.28MW,同时能够回收电厂蒸发水量的37.21%,合年回收凝结水分别为648万t和962万t。
It was suggested to erection the chimney power in the water cooling tower of the thermal power plant to recover the waste heat and water. And this chimney power system was analyzed thermodynamically. The predictions show that chimney power not only could generate eclectic power with the waste heat, but also could retrieve water through steam-water separator and recovery equipment at the top of the tower. It is found that within a limited range of height and turbine inlet temperature at the bottom, the tower thermal efficiency increases with the increasing of tower height, reaching a peak. For the 2×600 MW and 2×1 000 MW power plant units, the chimney power could provide 25.11MWe and 37.28 MW electric power respectively, for the tower height of 2 000 m, environmental temperature of 15℃ and turbine inlet temperature of 25 ℃ . In the same time, 37.21% water evaporated at the bottom of the tower is recovered, about 6.48×106 t per year and 9.62×106 t per year respectively.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第23期24-33,共10页
Proceedings of the CSEE
关键词
热力塔
湿冷机组火电厂
余热利用
热效率
水回收
chimney power
water-cooling power plant
waste heat utilization
thermal efficiency
water recovery
