某电厂膜法用于循环水系统的方案优化  

Optimization of Membrane Method Used for Circulating Water System in Thermal Power Plant

作　　者：姜琪[1] 李瑞瑞[1] 雷方俣 苏艳[1] 

机构地区：[1]西安热工研究院有限公司,西安710032 [2]浙江浙能嘉兴发电厂,浙江嘉兴314000

出　　处：《工业安全与环保》2014年第11期93-95,共3页Industrial Safety and Environmental Protection

摘　　要：以某水源为中水的废水"零排放"型火电厂,设置了循环水排污水回用系统,设计处理工艺为混凝澄清预处理-超滤-反渗透,反渗透淡水作为循环水及锅炉补给水系统水源。由于采用膜技术回收利用循环水排污水的工程实例中均存在膜系统运行不稳定,甚至无法正常运行的情况,并影响锅炉供水安全。对循环水处理工艺进行了试验研究。结果表明,超滤-反渗透装置水源采用石灰处理后的中水,循环水排污水采用碱性软化旁流处理工艺,可以减缓膜污堵,确保循环水系统稳定运行及锅炉给水安全,并满足全厂废水"零排放"的要求。Reclaimed water is used as water source in a wastewater zero discharge thermal power plant .The original designed treatment process is coagulation and clarification pretreatment- ultrafiltration - reverse osmosis for blowdown water and the reverse osmosis freshwater is used as make-up water source of circulating water and the boiler .In existed projects of blowdown water recycling system using membrane technology ,membrane systems run not stably or even can’t run normally and affect the security of boiler water supply .The circulating water treatment process is experimentally studied in this article .The results indicate that the reclaimed water treated by lime cad be used as make-up water source of ultrafiltration and reverse system and blowdown water can be treated with alkali bypass flow treatment ,which can slow membrane fouling ,ensure stable operation of the circulating water system and security of boiler feed water and meet the demand of wastewater zero discharge .

关 键 词：循环水处理 工艺优化 节水 膜技术 

分 类 号：X773[环境科学与工程—环境工程]