摘 要

本设计是对淮安市第三水厂的扩建工程设计。自来水厂的设计规模为150000m³/d，原水水质符合地面水III类水质标准， 除浊度、色度和细菌总数除外，其余参数均符合《生活饮用水卫生标准》（GB5749-2006）。

本设计根据进水量和水质，选择适当的工艺流程，并对各处理构筑物进行设计，包括取水构筑物、一级泵房、混凝设备、絮凝池、沉淀池、滤池、清水池、消毒设备、二级泵房等。最后，对自来水厂进行平面布置和高程不值，以及附属构筑物的设计。结果表明，淮安市自来水厂的扩建设计，在技术上是可行的。

本设计选用折板絮凝池,分为并联的两组，每组设计水量为0.911 m3/,每组分为两个系列 ，池子尺寸L×B=8.0×8.0=64.0㎡。设置6个斜管沉淀池，每池流量Q=0.289m3/s。选用6座双格V型滤池，单格宽 B=3.5m ，长L=14m。清水池共设两座，则每座清水池的有效容积7825m3。

关键词：常规水处理工艺；平面布置；高程布置

Huaian Third Waterworks Engineering Design（150000t/d）

ABSTRACT

The design was about the technology project of Huaian third water plant. The flow is 150000m³/d,and the quality of the original water is up to III water standard, except the turbidity、color and the total number of the bacteria. The other parameters can achieve the “Drinking Water Standard”(Ministry of Health 2006)

The rational process flow is chosen according to the quality and the quantity of the original flow. The structures designing include intake structure、pumping houses、flocculator、setting tank、filter、clean water tank、sterilizing equipment and so on. At last, the horizontal layout and elevation layout of the waterworks are made, and the auxiliary structures are designed. The outcomes shows that the regular water-treatment process is feasible in both economy and technology.

The design uses folded plate flocculation tank, divided into two groups in parallel, each designed water is 0.911 m³ /s, each group is divided into two series, pond size: L × B = 8.0 × 8.0 = 64.0 m. Set 6 Sedimentation, each pool flow Q = 0.289m³ / s. Selection of six pairs of lattice V-filter, single cell width B = 3.5m, length L = 14m. A total of two clean water tank, the effective volume of each block clear pool of 7825m^3.

Key words: regular water-treatment process；horizontal layout；elevation layout

目 录

1 概述.......................................................................1

1.1设计范围................................................................1

1.2设计原则................................................................1

1.3城市概况和自然条件......................................................2

1.3.1城市概况..........................................................2

1.3.2气象条件..........................................................2

1.3.3工程地质..........................................................2

1.4供水现状及规划..........................................................3

2 水源选择...................................................................4

2.1水源条件................................................................4

2.2取水点及取水构筑物形式确定..............................................4

2.2.1取水点的确定......................................................4

2.2.2取水构筑物类型....................................................5

2.3岸边式取水构筑物的构造和计算............................................8

2.4 取水泵房...............................................................10

2.4.1水泵选择...........................................................10

2.4.2泵房布置...........................................................10

2.4.3泵房地面层的设计标高...............................................10

2.4.4泵房的起吊、通风、交通和自控设施...................................10

2.4.5泵房的防渗和抗浮...................................................11

3 净水构筑物设计.............................................................12

3.1给水处理方法概述.......................................................12

3.2 水中成分性质和处理方法.................................................12

3.3 凝聚剂和投加...........................................................13

3.3.1凝聚剂.............................................................13

3.3.2 凝聚剂投加方式.....................................................13

3.4 混合...................................................................14

3.4.1 混合方式...........................................................14

3.4.2 静态混合器.........................................................16

3.5 絮凝的选择.............................................................18

3.6 絮凝池的设计计算.......................................................20

3.6.1设计参数.........................................................20

3.6.2设计计算.........................................................20

3.7 沉淀...................................................................25

3.7.1平流沉淀池.........................................................25

3.7.2 斜管（板）沉淀池...................................................27