王超;彭柱;郭浩;陈灏琳;田一梅;

• 1:天津生态城水务投资建设有限公司
• 2:天津大学环境科学与工程学院
• 3:自然资源部天津海水淡化与综合利用研究所
• 4:天津大学国际教育学院

摘要(Abstract)：

为明晰消毒剂对市政再生水管网中典型管件的腐蚀机理，针对流场易发生较大突变的90°弯头，引入计算流体力学(CFD)模拟了实验室管网中不同入口流速下不同点位的流速及剪力分布，并结合模拟结果，采用电化学测试及SEM微观分析方法研究了动态管网中消毒剂ClO_2对弯头的腐蚀规律。结果表明：90°弯头处流速和剪力随管道入口流速的增大而增大，易腐蚀点分布在90°弯头的内侧中心及外侧下游；投加ClO_2,在腐蚀前期可通过促进腐蚀产物生成而抑制腐蚀，而在腐蚀稳定期，ClO_2与剪切力协同作用破坏腐蚀垢层，易导致90°弯头处腐蚀产物脱落，加剧腐蚀。与直管段相比，90°弯头难以形成致密的腐蚀垢层而更易腐蚀，其主要原因在于消毒剂与水流剪切力的共同作用。

关键词(KeyWords)： 环境工程学;再生水;90°弯头;ClO_2;腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51478307)

作者(Authors): 王超;彭柱;郭浩;陈灏琳;田一梅;

DOI: 10.13637/j.issn.1009-6094.2022.0086

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