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《城镇供水》2012,(5):50
为提高城市供水管网抗外界干扰能力,消除供水管网安全隐患,北京市自来水集团2011年上半年启动了城市供水管网大规模改造工程。截至2011年底,完成了东南二环、西罗园小区等300多公里供水管线的消隐改造,更换老旧闸门、消火栓等供水管线附属设备3384座。进一步提高了供水管网安全运行的稳定性,优化了运行布局,确保了水质安全。2011年,北京市自来水集团改造管线300多公里。一是对东南二环等隐患管线进行改造,改造管线10.82公里,提高供水管网运行安全性。二是对西罗园小区、慧忠里小区等小区管线进行内喷涂防腐处理,改造管线323公里,提高自来水在管网输送中的水质安全。三是更换老旧闸门、消火栓等供水管线附属设备3384座。 相似文献
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雨污分流制改造工程设计方案改进的探讨 总被引:5,自引:0,他引:5
雨污分流制改造应充分利用原有的合流管网。从分析小区内排水管网的特点出发,介绍了小区内原有排水管网;比较了传统的雨污分流方案和改进方案的优缺点;提出了在中小型小区内的雨污分流制改造中,宜采用改进方案作为原有排水管网的改造方案。 相似文献
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由于历史原因,三明市沙县区老旧小区存在雨污合流、污水直排河流的情况,影响河道水质;雨水、污水合流管径小,容易出现淤堵、污水溢流等现象,影响小区居民的居住环境。由于雨水、污水混合排入污水处理厂,增加了污水处理厂负荷率,污水管网改造成为老旧小区改造内容中的重点。本文结合三明市沙县区翠绿小区的提升改造工程,针对当前污水管网问题,总结老旧小区污水管网提升改造质量管理,以期为同类项目提供一定参考。 相似文献
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输配水系统供水安全保障是城市饮用水安全保障的重要内容,而配水系统是水质恶化最严重的区域。本文系统分析了管网二次污染状况、成因和水质变化机制,探讨了配水管网的可能安全隐患和风险控制策略。在此基础上,针对老旧小区管网改造这一重要工程难题,重点介绍了管道内涂膜防锈技术原理和施工工艺,为配水管网二次污染控制和水质保障提供参考。 相似文献
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随着城市化的发展,作为民生工程,各级政府对老旧小区室外管网提升改造项目的投入越来越大。老旧小区室外给排水管网已越来越无法满足人们舒适性的生活需求,室外给水管网存在着管线老化、管径偏小、管线错乱接等问题,室外排水管网存在管线及检查井老化破损、雨污合流排放、管道淤堵、下雨局部积水严重等问题。本文根据这些存在的问题,分析老旧小区室外给排水管网提升改造的设计思路、方案及需注意的问题,为此类项目提供借鉴。 相似文献
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管网分质供水系统分析 总被引:2,自引:0,他引:2
论述了管网分质供水的必要性及分类 ,并通过系统分析当前主要的饮用水深度处理技术 ,结合某实际工程事例 ,分析了管网分质供水的饮用水成本 ,从技术、经济方面指出了管网分质供水的可行性 相似文献
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供水管网水质安全性评价对于提高供水调度与管理水平十分重要。提出了利用模糊数学解决复杂的水质安全性评价问题的方法。详细分析了余氯指标的评价标准,并以某城市供水管网为例研究了余氯的模糊评价方法。评价结果与实际水质状况相符,说明该模糊评判方法可用于管网水质的评价。 相似文献
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Even in industrialized countries like Germany, drinking water quality is a sensitive issue. Despite a generally high level of drinking water safety, contamination events do occur. We address the question whether demographic change may cause a spatial mismatch between installed capacities at the supply side and actual demand by water users, thereby increasing risks of microbiological contamination. Our investigation is based on a quantitative analysis using the largest publically available data-set on drinking water quality in Germany. We found that the number of reported contamination events in areas affected by population decrease was about twice as high as in areas with a stable or growing population. The relative frequency of microbiological contamination was found to be significantly correlated with rapidly depopulating areas. We conclude that in regions with negative population development, a statistically higher risk of microbiological drinking water contamination may coincide with a greater risk of recontamination during a longer passage in the distribution network. 相似文献
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Impact of particles on sediment accumulation in a drinking water distribution system 总被引:2,自引:0,他引:2
Discolouration of drinking water is one of the main reasons customers complain to their water company. Though corrosion of cast iron is often seen as the main source for this problem, the particles originating from the treatment plant play an important and potentially dominant role in the generation of a discolouration risk in drinking water distribution systems. To investigate this thesis a study was performed in a drinking water distribution system. In two similar isolated network areas the effect of particles on discolouration risk was studied with particle counting, the Resuspension Potential Method (RPM) and assessment of the total accumulated sediment. In the ‘Control Area’, supplied with normal drinking water, the discolouration risk was regenerated within 1.5 year. In the ‘Research Area’, supplied with particle-free water, this will take 10-15 years. An obvious remedy for controlling the discolouration risk is to improve the treatment with respect to the short peaks that are caused by particle breakthrough. 相似文献