给水排水毕业设计摘要

┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊摘要随着工业和城市建设的迅速发展，无锡市的现有供水设施已不能满足用水需要，并且水厂处理设备普遍处于超负荷运行。

为了确保该市2016年城市总体规划的实现，必须扩大现有城市供水设施。

因此省计经委上级同意建设无锡市给水工程。

无锡市中桥水厂给水工程设计包括了全套新的输配水管网设计，以及配套的取水构筑物，二泵站，以及水厂净化处理构筑物的设计。

无锡市地处太湖水网地区，水资源丰富水量充沛。

无锡市已在锡北运河，五里湖，外太湖上建造了取水构筑物,为满足日益增长的供水需求，在外太湖沿岸新建中桥水厂。

太湖为我国五大淡水湖之一，系地表水源。

综合分析太湖沿岸水文地质情况采用岸边合建式取水构筑物。

根据水源能力，中桥水厂设计规模定为30万m3/d。

选择的原则是根据原水水质、水量及当地气候特点，采用技术先进，运转安全可靠，操作管理方便，经济合理的运转工艺，以确保出水水质。

鉴于水库水源水质的不断恶化，饮用水水质标准的不断提高，人们对水质的要求也逐年增强，显然，一般常规处理工艺的局限性所带来的影响，迫使人们不得不寻求如何提高或改善或强化常规处理工艺，以适应人们日益提高对供水水质的要求。

因此根据水源特点，净水厂处理工艺为：管式静态混合器设备简单，维护管理方便，在设计流量范围内混合效果较好，不需外加动力设备。

折板絮凝池絮凝时间较短，絮凝效果较好。

沉淀池采用斜管沉淀池,沉淀效率高，池体小，占地少。

气浮池采用平流式气浮池，池深浅，造价低，管理方便。

滤池采用V型滤池，运行稳妥可靠，采用砂滤池，材料易得，滤床含污量大，周期长，滤速高，水质好，具有气水反洗和水表面扫洗，冲洗效果好。

同时，本设计课题还包括：水厂占地面积，人员配备，厂内建筑物布置和管线定位等。

无锡市为中等城市，对供水安全性要求较高，所以采用环状管网，全市布置15个环，共33个节点，47条管段。

整个工艺流程中主要构筑物的设计参数为设计水量Q’=300000m3/d，水厂自用水量按8%计算，计算水量Q=324000折板反应池分为三组，每组设计水量为Q = 10万m3/d，一组由两个絮凝池组成则单池设计流量为q=0.625m3/s。

絮凝时间T = 13min，絮凝池采用多通道折板絮凝池，里面安装折板箱，采用平行折板,分四档，每档流速分别为V1=0.3m/s，V2=0.25m/s，V3=0.20m/s ，V4=0.15m/s折板反应池为六个，则相应建六个斜管沉淀池。

单个沉淀池设计流量:q=0.625┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊m3/s。

清水区上升流速:2.8mm/s,沉淀池尺寸为mm1121⨯。

为保证进水均匀，进水区沿m21一侧。

池子总高4.87m,沉淀时间4.8min.采用平流式气浮池，分三个系列，每个系列分8格，共24格气浮区载气浮升分离速度：smmu/5.2=,气浮池接触室上升流速：smmv/18=,. 单格气浮池接触室面积9.45m2，气浮分离室平面面积为69.30分离室长度11m 设计滤速 V=10m/h,强制滤速V=12m/h,过滤周期T=48h,为节省占地,选双格V 型滤池,单格宽B =4m,长L =15.14m,单格面积60.502m,共分2 座,左右对称布置,每座面积f=1212m,总面积14522m。

滤池总高度4m拟建两个清水池，池子有效水深取 h u = 4.5 m，单池面积则为5000m2，采用正方形清水池，清水池的边长为71m。

┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊ABSTRACTAlong with the quick development of the industry and the city construction, the existing water supply facilities t in Wuxi City has already can't satisfy to use the water demand, and the water factory processing equipments is widespread to be placed in the super burden movement. For insuring the realization of the total programming in 2016, we must extend the existing city water supply facilities. So the province according to the reply constructed by upper grade Province agree to the water supply engineering in Wu xi City.The water supply engineering designs of Zhongqiao water factory in Wuxi City include the integrity pipe line net design, the facilities for taking and sending the water, and the facilities for water processing .The Wuxi City is in the water net region of the Tai lake, and the amount of water is abundant. There have been the north canal water factory, wuli lake water factory, and Zhongqiao water factory in Wuxi City. To satisfy the increasing need for water, Zhongqiao water factory will be extended. The tai lake is one of the five greatest fresh waters lakes in our country. According to the geology circumstance of the tai lake we take the the facilities of matching set up for taking water near the bank.According to the headwaters ability, the Zhongqiao water factory design scale is 300,000 m3/d. According to the raw water fluid matter, the water quantity and local weather characteristicses, we adopt the technology craft which is forerunner, safety ,credibility, conven ient, economy reasonable, to insure the water quantity.Owing to the water quantity of the lake is continuously worsen, the drinking water quantity standard continuously raise, the people's request for the water quantity also strengthens year by year, obviously, the general normal processing craft limits force people have to look for the ways that how to raise or improve or enhance the normal regulations processing craft to adapt for the raising request to the water quantity.Therefore according to headwaters characteristics, the clean water factory handle craft is:→→→The tube static state admixture machine is simple, and the management is convenient.respond pond is short and the result is better. The efficiency of the inclined tube precipitates pond is higher and the pond body is small, covering little. The pond depth of the even flow spirit pond is low, and the price is low, manage is convenient. The filter pond adopts the a v the filter pond, the running is credibility, the adopting the sand filter pond,┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊the material the is easy, and the bed of the filter pond have the great capacity for the dirty, the period the is long, the speed of filtering is high, the water quantity is good, and have the water and spirit anti- wash and the sweep to wash the sand, so it is effective.At the same time, other kinds of construction of water purification plant are also designed, such as the total area, staff distribution, the position of the structures, the pipelines in the plant, etc.Wuxi City have higher request towards the safety of supplying water, so we adopt wreath form pipe net, the whole city arranges 15 wreaths, total 33 nodes,47 tubes segment.The design parameters of main purification construction as follows:The design amount of water is 300000 m3/d, and the amount of water of self-uses in the factory the is 8% ,.So the amount of water is 324000 m3/d.The single space spirit of the pond is 9.45 m2, and the spirit floats to separate is 69.30m2.The fold plank reaction pond is divided into three, the each design water quantity is 100,000 m3s/d,and a single pond design water quantity is 0.625 m3s/ s. Respond time is 13 mi. There are many passage in the folds plank reaction pond with the fold plank box inside installs. The fold plank is the parallelism, dividing four files. Each file current velocity is: V1 =0.3 m/s, V2=0.25 m/s, V3=0.20 m/s, V4=0.15 m/sThere are six fold plank reaction ponds, then correspond to set up six precipitate pond with inclined tube . Discharge is 0.625m3/s.The clear water area rises at a velocity of 2.8 mms/s, and the size of the precipitate pond is :21m*11m. For guaranteeing into the water even, the water follow into the area from the side which is longer. The highth of the pond is 4.87 m ,and the precipitate time is 4.8 min.The Design filtering speed is 10 m/h, and the compulsive one is 12 m/ h. The period of the filter is 48h. In order to save to cover, we choose a v-filter pond divided into 2. And the breadth of a single space is 4m,and the length is 15.14m.So the area of single space 60.50m2.we build two v-filter pond and arrange them symmetry. Each one is 121m2, and the total area is 1452m2. The pond is 4m in the high.We will built two water ponds, and depth of the even water is 4.5 m, the area of the single pond is 5000 m2, adopting the exact square water pond, the length of each side of the water pond is 71m.。