摘 要

水在人们生活和生产中占有重要地位。在现代化工业企业中，为了生产上的需要以及改善劳动条件，水更是必不可少，缺水将会直接影响工业产值和国民经济发展的速度。连云港东海县第四水厂工程，是为了满足该区近期和远期用水量增长的需要而新建的。其设计规模为5万吨/日，要求根据所给资料进行给水工艺设计和单体构筑物设计计算，包括取水输水构筑物设计、输配水管网设计、净水厂设计、工程概算和制水成本计算。取水构筑物设计选用岸边式取水构筑物，岸边式取水构筑物的构造主要进行格栅和格网的计算。取水泵房设计主要是水泵的选择，布置以及泵房的设计标高确定。

净水厂采用工艺流程为：

其中絮凝池选用往复式隔板絮凝池,采用两组池子。沉淀池选用平流沉淀池，也采用两组。采用V 型滤池，V 型滤池的特点是单池面积较大，过滤周期长，水质好，节省反冲洗水量。由于滤料层较厚，载污量大，滤后水的出水浊度普遍小于0.5NTU。

配水构筑物的设计主要计算设计扬程，初选水泵和电机，确定方案；吸、压管路设计，计算各管道水头损失得到水泵实际扬程，与设计扬程进行比较；附属设备的选择。

关键词：水厂工程；取水输水构筑物；输配水管网；净水厂

Lianyungang Donghai County fourth waterworks engineering design

ABSTRACT

Water plays an important role in people's life and production. In modern industrial enterprises, as well as the need to improve working conditions for the production of water is essential, water shortages will have a direct impact on the speed of industrial production and national economic development. Lianyungang Donghai County fourth district waterworks project is to meet short-term and long-term water needs of the new growth. Its design capacity is 50,000 tons / day, depending on the requirements of water supply to the data for process design and design calculations monomer structures, including water conveyance structures design, distribution pipe network design, water treatment plant design, engineering estimates and cost of water calculations. Water intake structures select shore structures and shore-type intake structures’ construction compute grille and grid mainly. Water pumping station’ design mainly includes pump selection, arrangement and elevation of the pumping station.

Waterworks’ using process:

Flocculation selects reciprocating partition flocculation, using two groups. Sedimentation selects advection sedimentation tank, using two groups too. The V-filter in a single pool area is characterized by large, long-filtration cycle, water quality, save backwash water. Since the filter layer is thick, containing sewage capacity, water filtered water turbidity generally less than 0.5NTU.

Water distribution structures are primarily designed to calculate design head, primary pump and motor, determine the program; suction, pressure piping design, calculate the head loss in the pipeline to get the actual pump head, comparing with the design head; choose ancillary equipment.

Key words: water works; Water intake structures; Water distribution networks; waterworks

目 录

1 东海县基础资料..............................................................1

1.1城市概况................................................................1

1.2地形地貌.................................................... ............1

1.3东海水文................................................................1

1.4东海气候................................................................2

2 取水构筑物设计..............................................................3

2.1水源的选择..............................................................3

2.2水源卫生防护............................................................3

2.3取水构筑物位置选择......................................................4

2.3.1一般原则..........................................................4

2.3.2位置选择..........................................................4

2.4 取水构筑物形式的选择....................................................5

2.4.1取水构筑物基本型式................................................5

2.4.2岸边式取水构筑物的构造和计算......................................6

2.5 取水泵房................................................................8

2.5.1水泵选择..........................................................8

2.5.2泵房布置..........................................................8

2.5.3泵房地面层的设计标高..............................................8

2.5.4泵房的起吊、通风、交通和自控设施...................................8

2.5.5泵房的防渗和抗浮..................................................8

3 净水构筑物设计.............................................................10

3.1给水处理方法概述.......................................................10

3.2 水中成分性质和处理方法.................................................10

3.3 凝聚剂和投加...........................................................11

3.3.1凝聚剂...........................................................11

3.3.2 凝聚剂投加方式...................................................11

3.4 混合...................................................................12

3.4.1 混合方式.........................................................12