某电厂温排水和余氯排放的数值模拟研究  

Numerical Simulation of Thermal and Residual Chlorine Emissions from A Power Plant

作　　者：秦晓[1] 袁珏[1] QIN Xiao;YUAN Jue(China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]中国水利水电科学研究院,北京100038

出　　处：《水利科技与经济》2020年第10期1-9,共9页Water Conservancy Science and Technology and Economy

摘　　要：滨海电厂通常以海水为冷却水源。海水含有的海生物易黏附在冷凝器铜管内壁,造成铜管壁热阻迅速增大,严重影响冷却效果,甚至阻塞铜管,迫使凝汽器停运,危及电厂的安全运行。因此,冷却水进入管道前,一般采用加氯进行处理,防止海生物黏附于管壁,同时会导致一定量的余氯随冷却水排出,影响受纳水域的水质。采用MIKE21模型,对电厂温排水和余氯排放进行数值模拟。结果表明,装机容量为5×600 MW+2×1000 MW时,大小潮条件下,0.02 mg/L等值线包络面积不大于0.8 km^2。4℃全潮最大温升包络面积等值线约3.28 km^2,1℃全潮最大温升包络面积等值线约38.5 km^2。Coastal power plants usually use seawater as cooling water source.Seawater containing marine organisms can easily adhere to the inner wall of the copper tube of the condenser,resulting in the rapid increase of heat transfer resistance of the copper tube wall,which seriously affects the cooling effect and even blocks the copper tube,forcing the condenser to stop operation and endangering the safe operation of the power plant.Therefore,before the cooling water enters the pipeline,it is generally treated by adding chlorine to prevent the adhesion of marine organisms to the pipe wall,and at the same time,a certain amount of residual chlorine will be discharged with the cooling water,which will affect the water quality of the receiving waters.In this paper,MIKE21 model is used to simulate the cooling water and residual chlorine emission of the power plant.The results show that under the condition of large and small tides when the installed capacity is 5×600 MW+2×1000 MW,the maximal envelope areas of 0.02 mg/L is not larger than 0.8 km^2,the maximal envelope areas of 4℃ increment is about 3.28 km^2,the maximal envelope areas of 1℃ increment is about 38.5 km^2.

关 键 词：余氯 温排水 数学模型 潮流 衰减系数 

分 类 号：TM62[电气工程—电力系统及自动化]