热力发电Issue(10)：77-81,5.DOI:10.3969/j.issn.1002-3364.2015.10.077
板式蒸发式凝汽器在300 MW直接空冷机组中的应用
Application of plate evaporative condenser on a 300 MW direct air-cooling unit
摘要
Abstract
In summer,the direct air cooling units will suffer high back pressure and its output power will be insufficient.Against this problem,the plate evaporative condensing system was proposed to diverge part of the turbine exhaust steam and reduce the heat load of air cooling island,thus the unit operating back pres-sure can be decreased.Taking a 300 MW direct air cooling unit as the example,the retrofitting was carried out.The operation results show that,under condition with rated load and ambient temperature of 30 ℃,af-ter the plate evaporative condensing system was put into service,the unit back pressure decreased from 33. 47 kPa to 29.05 kPa,satisfying the requirements under rated condition (30 kPa).Under the TRL condition and at ambient temperature of 30 ℃ (the wet bulb temperature of 17.68 ℃),the condensing ability of the plate evaporative condensing system was 50.11 t/h,and the unit back pressure decreased by 4.1 kPa.The water consumption rate of the plate evaporative condensing system was 0.7 to 0.8.The operation effect of the plate evaporative condensing system got better with an increase in the ambient temperature.As the hu-midity of the ambient air increased,both the steam flow and supplement circulating water flow decreased and with the similar trend.When the air humidity climbed to a certain value,the steam flow and supple-ment circulating water flow approached to a definite value.The results show the retrofit meets the design requirements and the system runs stably.关键词
直接空冷机组/机组背压/板式蒸发式凝汽器/环境温度/空气湿度/冷凝量/水耗率Key words
direct air-cooling unit/unit back pressure/plate evaporative condenser/environmental tempera-ture/ambient temperature/air humidity/condensation amount/water consumption rate分类
能源科技引用本文复制引用
吕凯,彭兆春,刘文华,李高潮,叶军,陈胜利..板式蒸发式凝汽器在300 MW直接空冷机组中的应用[J].热力发电,2015,(10):77-81,5.基金项目
国家科技支撑计划项目(2011BAA04B02) （2011BAA04B02）
