排水管渠内壁腐蚀评判方法
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摘要
排水管渠在多年使用过程中,由于受到污水水质、管道材料老化等作用,内壁出现腐蚀现象,影响排水系统的安全运行。内壁腐蚀状况评判是进行排水管渠防护的基础。首先根据相关理论和规范要求,提出三种内壁腐蚀评判方法(数值评判法、水位评判法和p H评判法)。然后根据某干线水质数据、水量数据和管网拓扑数据,运用三种方法进行相关评判,并与检测点的监测结果进行对比。结果表明,三种方法相互配合,对评判排水管渠内壁腐蚀情况具有合理可行性。
Due to the effects of sewage quality and pipe material aging in the course of years of usage,the inner wall of drainage pipesis corroded,which affects the safe operation of the drainage system.The inner wall corrosion degree assessment is the basis of the protection of drainage pipes. Firstly,three kinds of inner wall corrosion evaluation methods are proposed according to the relevant theories and specification requirements: numerical evaluation method,water level evaluation method and p H evaluation method. And then,according to water quality data,water quantity data and pipe network topology data,three methods are used for evaluation. The evaluation results of check points are compared with monitoring results. The results showed it was reasonable and feasible to cooperate the three methods with each other for evaluating the inner wall corrosion of the drainage pipes.
Due to the effects of sewage quality and pipe material aging in the course of years of usage,the inner wall of drainage pipesis corroded,which affects the safe operation of the drainage system.The inner wall corrosion degree assessment is the basis of the protection of drainage pipes. Firstly,three kinds of inner wall corrosion evaluation methods are proposed according to the relevant theories and specification requirements: numerical evaluation method,water level evaluation method and p H evaluation method. And then,according to water quality data,water quantity data and pipe network topology data,three methods are used for evaluation. The evaluation results of check points are compared with monitoring results. The results showed it was reasonable and feasible to cooperate the three methods with each other for evaluating the inner wall corrosion of the drainage pipes.
引文
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[2]闻宝联.城市污水环境下混凝土腐蚀及耐久性研究[D].天津:天津大学,2005.
[3]Vincke E,Boon N,Verstraete W.Analysis of the microbial communities on corroded concrete sewer pipes-a case study[J].Appl Microbiol Biotechnol,2001,57(5/6):776-785.
[4]Nielsen A H,Vollertsen J,Jensen H S,et al.Influence of pipe material and surfaces on sulfide related odor and corrosion in sewers[J].Water Res,2008,42(15):4206-4214.
[5]Miller T M.Corrosion Protection in Concrete Sanitary Sewers[P].USA:US5834075A,1998-11-10.