中水回用于火电厂循环冷却水时的药剂优选与应用研究  

Optimization and Applicability of Chemical Agents for Reclaimed Water,as Circulating Cooling Water of Thermal Power Plant

作　　者：毛春奎 朱志平[1] 李涛[1] 周上明 阳霍 MAO Chunkui;ZHU Zhiping;LI Tao;ZHOU Shangming;YANG Huo(School of Chemistry and Chemical Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学化学化工学院,长沙410114

出　　处：《中国腐蚀与防护学报》2025年第3期675-686,共12页Journal of Chinese Society For Corrosion and Protection

基　　金：湖南省教育厅科学研究重点项目(23A0269)。

摘　　要：基于静态阻垢法、杀生剂能效评价法、电化学与响应面分析法,筛选、评估了中水用作火电厂循环冷却水时复合药剂的阻垢、杀菌、缓蚀性能,采用SEM、金相显微镜、EDS对腐蚀后的Q235钢试片进行了形貌、成分分析。结果表明,通过优化获得的中水回用循环冷却水复合配方为:阻垢剂17 mg/L+杀菌剂40 mg/L+葡萄糖酸钠90 mg/L+硫酸锌11 mg/L,阻垢率为95.7%、杀菌有效时间为15 d、缓蚀率为91.27%;药剂之间存在较好的协同效应,该复合合药剂可同时抑制阴极和阳极反应,是一种混合型、多功能的冷却循环水水处理环保药剂。The reuse of reclaimed water as a source of circulating cooling water for thermal power plants is an increasingly common way to save water.However,it has led to troubles such as microbial growth,corrosion and scaling.Herein,the performance of composite agents in scaling inhibition,bactericidal and corrosion inhibition was assessed for commercial Q235 carbon steel in reclaimed water was assessed used as circulating cooling water of thermal power plant via static scale inhibition method,biocide energy efficiency evaluation method,electrochemical and response surface analysis method etc.The test specimens were analyzed in terms of morphology and composition by using SEM,metallography and EDS.The results showed that the optimal formulation of composite chemical agents for the candidate reclaimed water as the recycling circulating cooling water is as follows:scale inhibitor 17 mg/L+biocide 40 mg/L+sodium gluconate 90 mg/L+zinc sulfate 11 mg/L,which presents a scale inhibition rate of 95.7%,a bactericidal effective time of 15 d,and a corrosion inhibition rate of 91.27%.Furthermore,there is a better synergistic effect between the various agents,and the composite agents can inhibit the cathodic and anodic reactions simultaneously.The composite agents can inhibit cathodic and anodic reaction at the same time,which is a kind of hybrid,multi-functional,environmentally friendly agent for cooling circulating water treatment.

关 键 词：中水 响应面优化 杀菌 阻垢 缓蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]