两种水处理工艺对再生水管网腐蚀的影响

发布时间：2018-02-06 05:46

本文关键词： 再生水水处理工艺配水管网腐蚀腐蚀产物　出处：《腐蚀与防护》2017年06期 　论文类型：期刊论文

【摘要】：基于某再生水厂现有水处理工艺,对其混凝沉淀和消毒工艺进行优化,通过挂片失重试验、扫描电镜(SEM)观察和X射线衍射(XRD)分析对比研究了两种再生水处理工艺对管网腐蚀的影响。结果表明:优化工艺出水的Larson指数和微生物活性比原工艺出水的显著降低,金属表面腐蚀层呈光滑晶态状,在优化工艺产出的再生水中,对管体起到保护作用的CaCO_3层从腐蚀初期就开始形成并贯穿整个腐蚀过程中,使再生水管网的腐蚀情况得到缓解,因此优化工艺可有效地缓解铸铁管网的腐蚀。
[Abstract]:Based on the existing water treatment process in a reclaimed water plant, the coagulation, sedimentation and disinfection processes were optimized, and the weightlessness test was carried out by hanging tablets. Scanning electron microscopy (SEM) observation and X-ray diffraction (XRD). The effects of two reclaimed water treatment processes on pipe network corrosion were analyzed and compared. The results showed that the Larson index and microbial activity of the optimized effluent were significantly lower than that of the original effluent. The corrosion layer on the metal surface is smooth and crystalline. In the regenerated water produced by the optimized process, the CaCO_3 layer, which plays a protective role on the tube body, has been formed from the initial corrosion stage and runs through the whole corrosion process. The corrosion of regenerative pipe net is alleviated, so the optimized technology can effectively alleviate the corrosion of cast iron pipe net.
【作者单位】：北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室;北京市市政工程设计研究总院有限公司;北京未来科技城置业有限公司;北京市政建设集团有限责任公司;
【基金】：国家自然科学基金(51678026)
【分类号】：TQ085

【相似文献】