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山东省夏津县自来水厂BOT项目可行性研究报告DOC

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随着夏津县经济发展以及县城规模的不断扩大,目前供水现状已经不能满足 县城社会经济发展的需要,为加快夏津县经济建设步伐,保证区域经济可持续发 展,拟定在县城北6km处的夏津水库旁修建净水厂一座,占地面积99.97亩。夏津 水库水源为黄河水,是本工程比较理想的供水水源。 夏津县自来水厂BOT项目主要包括取水工程、净水工程、输水工程、配水工 程四个部分。根据夏津县一二期供水服务范围供水量预测及核算,夏津县拟建净 水厂规模一期为5万m 3 /d,二期为10万m 3 /d。 当地唯一满足工程规模的水源为夏津水库,其水源为黄河水。通过分析水库 水质特性,确定取水工程改造方式,原水尽量取自水库表层以下约1.5m水层。净 水厂在充分论证原水水质的前提下,对投药、混合、絮凝、沉淀、过滤、消毒、 污泥处理工艺进行充分比选,提出水质安全性高、适合当地生产管理水平的工艺, 即管式静态混合器+折板反应+平流沉淀+V型滤池+污泥处理的工艺路线,并通过 化学处理的方法有效地保证出水的水质。 综合考虑工程沿线地质、施工条件等因素以及工程对安全性、经济性的要求, 本工程设计采用玻璃钢夹砂管、球墨铸铁管和PE管。参考输配水管线定线原则, 根据输配水管线方案的比选,选定输配水管线的走向并根据各段管线的流量配置 管径。 本工程建成后,夏津县自来水厂BOT项目的一期供水规模为5万m 3 /d,供水 的水质得到保证,并提高了城市供水的安全性。一期工程总投资12309万元,年 制水量1825万m 3 ,平均单位制水成本0.596元/m 3 。 关键词:需水量;取水;净水工艺选择;输水;配水;净水厂ABSTRACT Along with the economic development and the unceasing expansion scale of Xiajin County, the current status of water supply can’t meet the requirement of the social and economic development. In order to accelerate the economic construction speed of Xiajin County, and ensure the sustainable development of regional economy, we decide to draw up a plan of constructing water purification plant which is located in north Xiajin reservoir, covers an area of 99.97 mu. The source of Xiajin reservoir is the Yellow River water which is the ideal water source. The water supply BOT project in Xiajin County mainly includes four parts: the water intake engineering, the water purification engineering, the water conveyance engineering, the water distribution engineering. According to the water supply prediction and calculation of the first and second phase water plant scale, Xiajin County decide to construct water treatment plant, the first period of the proposed plant scale is 50000m 3 /d, the second period is 100000m 3 /d. The only source meeting the engineering scale is Xiajin reservoir, which source is the Yellow River water. Through analyzing the water characteristics of reservoirs, we can identify the transformation ways of the water intake engineering, and try to get the raw water from the reservoir below the surface to about 1.5m layer. Under the premise of sufficient argumentation of the raw water quality, the treatment processes include dosing, mixing, sedimentation, flocculation, disinfection, sludge treatment are comparsion and selection fully. Then, the water treatment plant proposed the treatment process of higher safety and more suitable for local production management, which includes the tubular static mixer, folding reaction of advection precipitating, V type filter and sludge treatment process, and ensured the effluent quality effectively by chemical treatment method. After considering the engineering geology along the line, construction conditions and project on security and economy, the project design adopt GRP sand pipe, ductile iron pipe and PE pipe. After reference to water conveyance and distribution pipeline alignment principle, according to the water conveyance and distribution pipeline scheme selection, we select the water conveyance and distribution pipeline direction, and distribute pipe diameter according to the section of pipeline flow. After the completion of the project, the first period scale of the water supply BOT project in Xiajin County is 50000m 3 /d, the water quality is ensured, and the city water supply safety is improved. The total investment of the first period of project is123.09 million, manufacturing capacity is 18.25 million m 3 /year, the average unit cost of water production is 0.596 yuan/m 3 . KEY WORDS:water requirement; water intake; water purification process selection; conveyance water; distribution water; water purification plantI 目 录 第一章 前 言........................................................................................................1 1.1 我国目前城市给水处理现状 .....................................1 1.1.1 我国水资源现状 ...........................................1 1.1.2 给水处理工艺技术现状与发展 ...............................1 1.2 本文的研究内容 ...............................................3 第二章 项目背景........................................................................................................4 2.1 编制依据、编制范围和编制原则 .................................4 2.1.1 编制依据及规范标准 .......................................4 2.1.2 编制范围 .................................................5 2.1.3 编制原则 .................................................5 2.2 城市概况及自然条件 ...........................................6 2.2.1 城市概况 .................................................6 2.2.2 自然条件 .................................................7 2.3 城市供水现状 .................................................9 2.3.1 现状供水水源和设施概况 ...................................9 2.3.2 现状供水问题 ............................................11 2.4 工程建设的必要性 ............................................11 第三章 需水量预测及水源水质分析 .....................................................................14 3.1 需水量的预测 ................................................14 3.1.1 供水服务面积 ............................................14 3.1.2 供水量预测方法 ..........................................14 3.2 工程规模的确定 ..............................................18 3.3 出水水质 ....................................................18 3.4 管网末端水压 ................................................19 3.5 厂址选择 ....................................................19 3.6 水源选择和用水可靠性分析 ....................................19 3.6.1 地表水资源 ..............................................20 3.6.2 地下水资源 ..............................................20 3.6.3 客水资源 ................................................20 3.6.4 水源选择 ................................................23 3.7 原水水质及评价 ..............................................23 3.8 需要处理的项目 ..............................................23 第四章 工程方案论证及选择 .................................................................................24 4.1 取水工程 ....................................................24 4.1.1 水库水质特性分析 ........................................24 4.1.2 改造方案拟定 ............................................24 4.2 净水厂工程 ..................................................24 4.2.1 投药工艺 ................................................25 4.2.2 混合工艺 ................................................25 4.2.3 絮凝工艺 ................................................26II 4.2.4 沉淀工艺 ................................................26 4.2.5 过滤工艺 ................................................27 4.2.6 消毒工艺 ................................................29 4.2.7 排泥水处理 ..............................................31 4.2.8 污泥处理 ................................................32 4.2.9 处理工艺 ................................................33 4.3 输水工程 ....................................................34 4.3.1 输水方式选择 ............................................34 4.3.2 输水管道根数选择 ........................................34 4.3.3 输水管线线路选择 ........................................35 4.3.4 输水管材选择 ............................................35 4.4 配水工程 ....................................................38 4.4.1 配水工程设计范围 ........................................38 4.4.2 配水管网布线方案 ........................................38 4.4.3 一期工程实施方案 ........................................38 4.4.4 维持管网水质 ............................................39 4.4.5 配水管网管材选择 ........................................39 第五章 工程设计........................................................................................................41 5.1 取水工程 ....................................................41 5.1.1 设计水量 ................................................41 5.1.2 取水口 ..................................................41 5.2 净水厂设计 ..................................................42 5.2.1 设计流量 ................................................42 5.2.2 一级泵房 ................................................42 5.2.3 絮凝池 ..................................................43 5.2.4 平流沉淀池 ..............................................43 5.2.5 V型滤池 .................................................44 5.2.6 清水池 ..................................................45 5.2.7 二级泵房 ................................................45 5.2.8 加药系统 ................................................46 5.2.9 加氯系统 ................................................46 5.2.10 回用水池 ................................................47 5.2.11 污水污泥处理 ...........................................47 5.2.12 附属用房 ...............................................49 5.2.13 厂区总平面布置 .........................................49 5.2.14 竖向设计 ...............................................50 5.2.15 管线设置 ...............................................50 5.2.17 厂区道路 ...............................................50 5.2.18 厂区绿化 ...............................................50 5.3 输水管线设计 ................................................51 5.3.1 设计参数 ................................................51 5.3.2 输水管材及压力等级 ......................................51 5.3.3 输水管道定线 ............................................51III 5.3.4 输水管线工程设计 ........................................51 5.3.5 管道穿越河道的处理 ......................................52 5.3.6 输水管附属设施 ..........................................53 5.4 配水管网 ....................................................53 5.4.1 配水管网计算 ............................................53 5.4.2 二期配水管网设计 ........................................55 5.4.3 一期配水管网设计 ........................................56 5.4.4 现状供水管网 ............................................59 第六章 工程投资与成本分析 .................................................................................60 6.1 工程投资 ....................................................60 6.2 成本分析 ....................................................61 第七章 结论和建议..................................................................................................63 7.1 结论 ........................................................63 7.2 问题与建议 ..................................................63 7.2.1 原水浊度、污染指数的进一步分析 ..........................63 7.2.2 原水水质的变化对污泥干化场运行效果的影响关系 ............64