循环冷却水水质控制新思路与中试验证  

An Extremely High Concentration Ratio in Recirculating Cooling Water System Achieved by Selective Ion Removal:A Pilot Test

作　　者：王芷铉 蒋金凤 郑项楠 郑少奎[1] WANG Zhixuan;JIANG Jinfeng;ZHENG Xiangnan;ZHENG Shaokui(MOE Key Laboratory of Water and Sediment Sciences/State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学环境学院,水沙科学教育部重点实验室/水环境模拟国家重点实验室,北京100875

出　　处：《水处理技术》2025年第2期105-109,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(22176015)。

摘　　要：系统调研了中央空调循环冷却水系统加药法水质控制技术现状,设计了选择性去除有害离子(Ca^(2+)、Mg^(2+)、Cl^(-))、保留碱度等有益含氧阴离子为特征的循环冷却水水质控制新思路,通过生产性试验验证了水质控制效果、技术可行性和工艺稳定性。结果表明,新思路指导下循环冷却水浓缩倍数(以电导率计最高值为30)远高于加药法,“钙硬度加总碱度”最高值达到《工业循环冷却水处理设计规范GB/T 50050-2017》限值的5倍,但Ca^(2+)、Mg^(2+)、Cl^(-)浓度仅为加药法的≤1/6、≤1/6、≤3/5,浊度仅为加药法的1/10,腐蚀、结垢风险均稳定可控,抑菌效果明显,节水潜力巨大。A pilot test was conducted in this study to demonstrate the feasibility of an extremely high concentration ratio(~30)in the recirculating cooling water system by selective ion removal,following an overall in-site investigation on the recirculating cooling water system for central air conditioner operated by the prevailing chemical addition.The pilot-scale equipment selectively removed harmful ions(i.e.,Ca^(2+),Mg^(2+)and Cl^(-))from recirculating cooling water when beneficial oxygenated anions(e.g.,bicarbonate,sulfate,and etc.)were retained.Under the conditions,the concentrations of Ca^(2+),Mg^(2+),and Cl^(-)were controlled at≤1/6,≤1/6,≤3/5 of those achieved by the chemical addition.The highest level of"Hardness and Total Alkalinity"due to selective ion removal was as high as five times the limit recommended in the"Code for design of industrial recirculating cooling water treatment(GB/T 50050-2017)".However,the turbidity by selective ion removal is solely 1/10 of that by the chemical addition.Furthermore,no corrosion and scaling risks were observed during the long-term operational periods,when algal growth was effectively inhibited in the absence of exogenous nutrient input.

关 键 词：循环冷却水 超高浓缩倍数 选择性去除 中试 

分 类 号：X703[环境科学与工程—环境工程]