1000MW煤燃电厂开式海水冷却系统中突发性藻类污染治理研究  

Study on the management of sudden algal pollution in open sea water cooling system of 1000MW coal-fired power plant

作　　者：蒋宏朝 JIANG Hongchao(National Energy Group Zhejiang Ninghai Power Generation Co.,Ltd.,Ningbo 315612,China)

机构地区：[1]国能浙江宁海发电有限公司,浙江宁波315612

出　　处：《能源工程》2024年第5期59-64,共6页Energy Engineering

摘　　要：针对南方某滨海电厂海水冷却塔塔池出现海藻爆发式生长现象,对海水循环水和补充水的水质进行分析检测,以探讨海藻爆发式生长的突发原因。同时,在循环水不停机工况下,采用氧化性杀生剂和非氧化性杀生剂联合使用的化学法对塔池海藻附着物进行了剥离和杀灭处理,以期快速高效地消除可能因海藻爆发式生长引起的循环水运行隐患。结果显示,当富含营养盐的海水补充水进入循环水后,循环水中有利于海藻生长的如无机氮、活性磷酸盐和溶解固形物等无机盐含量大幅增加,最终导致海藻出现爆发式生长,且主要是附着生活的绿色发丝藻、小羽毛藻和扁绿丝藻。投加次氯酸钠和SW303后,循环水浊度和叶绿素a浓度的增长趋势完全一致,变化幅度近似,同时塔池和基座边壁上的藻附着物明显有剥离现象,表明所采用的化学法对藻附着物具有显著剥离和杀灭效果,且循环水在处理期间仍处于安全运行状态。Regarding the phenomenon of seaweed outbreak in the seawater cooling tower of a coastal power plant in the south,recirculating water and make-up water were analyzed to explore the reasons for the explosive growth of seaweed.Meanwhile,in order to quickly and efficiently eliminate potential hazards in recirculating water operation caused by seaweed outbreak,under the condition of continuous operation of recirculating water,the chemical method of using a combination of oxidizing and non�oxidizing biocides was used to strip and kill the seaweed attachments in the tower pond.The results showed that after the make-up seawater mixed with Nutrient-rich water entered the recirculating water,the nutrient content(such as inorganic nitrogen,active phosphate,and dissolved solids)in the recirculating water beneficial for the growth of seaweed increased significantly and led to explosive growth of seaweed finally.And it is mainly attached to the life of Derbesia,Bryopsis and Enteromorpba.After the addition of sodium hypochlorite and SW303,the growth trend of turbidity and chlorophyll a concentration in the circulating water was completely consistent,and the change range was similar,and the algal attachment on the base wall of the tower pond was obviously peeling,indicating that the chemical method adopted had a significant peeling and killing effect on the algae attachment,and the circulating water was still in a safe operating state during the treatment period.

关 键 词：海水冷却塔 藻污染 化学法 爆发式生长 

分 类 号：X55[环境科学与工程—环境工程] TQ085.4[化学工程]