摘 要

给水工程包括取水工程、净水工程、输配水工程以及其他调节构筑物组成。

南京市高淳区的给水工程，是为了满足该区近期或远期用水量增长的需要而修建的。本设计采用固城湖作为水源，这样不仅可以供给本地，还可以返供应南京城，虽然水质略差，但是符合水质标准，并且省去大量引水所用管线的费用。

该水厂供水设计规模为10万吨/日，处理流程包括：

吸水井→一级泵房→管式混合→隔板絮凝→平流沉淀→V型滤池过滤→液氯消毒→清水池→二级泵房。

吸水井尺寸为：12m×4m×8.6m；

溶液池尺寸为：6m×3m×1.5m；

溶解池尺寸为：2.5m×2.5m×1.3m；

隔板絮凝池尺寸为：32.74m×18.9m×2.8m；

平流沉淀池尺寸为：108m×18.9m×3.6m；

V型滤池总尺寸为：40.76m×31.68m×6.45m；

二泵房平面尺寸为：40m×20m。

关键词：给水工程；净水工程工艺；混凝；沉淀；消毒；过滤

The Preliminary Design of the Second Water Plant in Nanjing Gaochun District (100000 tons/day)

ABSTRACT

Water supply engineering consists of water-intake engineering, water-treatment engineering, water-distribution engineering and other regulation structures.

This water supply engineering project is proposed to satisfy the recent and long-term water consumption increase of Gaochun District in Nanjing. The water comes from Gucheng Lake. It can be not only supplied to the local area, but also supplied back to Nanjing. Though the water quality is a little bit poorer, it still meets the standards. And a lot of costs of the pipeline can be saved.

The designed water consumption is 10000m3/d. The technological process of the plant is as follows:

Pipe Mixing → Clapboard Flocculation →Horizontal Flow Sedimentation → V type filter Filtration → Liquid Chlorine Disinfection.

And the sizes of main structures are listed below:

Suction well: 12m×4m×8.6m;

Solution tank: 6m×3m×1.5m;

Dissolving tank: 2.5m×2.5m×1.3m;

Spacer flocculation tank: 32.74m×18.9m×2.8m;

Horizontal flow sedimentation tank: 108m×18.9m×3.6m;

V type filter: 40.76m×31.68m×6.45m;

Second pumping station: 40m×20m.

Key words: water supply engineering; water treatment engineering; coagulation; sedimentation; disinfection; filtration

目 录

1 绪论…………………………………………………………………………………………………1

1.1 原始资料…………………………………………………………………………………1

1.1.1 南京市高淳区概况………………………………………………………………1

1.1.2 高淳区环境状况……………………………………………………………………1

1.1.3 高淳区经济状况……………………………………………………………………2

1.1.4 高淳区工业情况……………………………………………………………………2

1.1.5 高淳区交通状况…………………………………………………………………5

1.1.6 高淳区旅游资料…………………………………………………………………5

2 水处理工艺比选…………………………………………………………………………………6

2.1净水工艺前的工艺…………………………………………………………………………6

2.1.1 水源取水……………………………………………………………………………6

2.1.2 吸水井………………………………………………………………………………6

2.1.3 一级泵房……………………………………………………………………………6

2.2净水工艺比选………………………………………………………………………………6

2.2.1 混凝………………………………………………………………………………6

2.2.2 混合与絮凝设备……………………………………………………………………11

2.2.3 沉淀和澄清………………………………………………………………………15

2.2.4 过滤…………………………………………………………………………………16

2.2.5 消毒…………………………………………………………………………………22

3 设计计算……………………………………………………………………………………………26

3.1 取水及一级泵站…………………………………………………………………………26

3.1.1 进水管设计……………………………………………………………………………26

3.1.2 一级泵站设计……………………………………………………………………26

3.2 混凝沉淀……………………………………………………………………………………28

3.2.1 混凝剂投配设备的设计……………………………………………………………28

3.2.2 平流沉淀池设计……………………………………………………………………34

3.3 V型滤池设计计算…………………………………………………………………………37

3.3.1 设计用水量……………………………………………………………………………37

3.3.2 数据选用……………………………………………………………………………37

3.3.3 滤池面积及尺寸……………………………………………………………………37

3.3.4 滤池进水系统………………………………………………………………………38

3.3.5 滤池出水系统……………………………………………………………………41

3.3.6 反冲洗系统……………………………………………………………………………41

3.3.7 过滤系统……………………………………………………………………………44

3.3.8 排水系统……………………………………………………………………………44

3.3.9 滤池总高……………………………………………………………………………45

3.3.10 反冲洗泵房设计………………………………………………………………………46

3.4 消毒计算…………………………………………………………………………………48

3.5 V型滤池设计计算…………………………………………………………………………49

3.5.1 清水池有效容积…………………………………………………………………49

3.5.2 平面尺寸…………………………………………………………………………49

3.5.3 管道计算…………………………………………………………………………49

3.5.4 清水池内布置……………………………………………………………………50

3.5.5 清水池水面标高…………………………………………………………………50

3.6 吸水井的设计…………………………………………………………………………50

3.7 二泵房的设计…………………………………………………………………………50

4 水厂总体布置…………………………………………………………………………………………52

4.1 水厂平面布置……………………………………………………………………………………52

4.2 水厂高程布置…………………………………………………………………………………52

4.2.1 水头损失计算………………………………………………………………………52

4.2.2 构筑物水面标高………………………………………………………………53

结论 …………………………………………………………………………………………………54

致谢 …………………………………………………………………………………………………55