天翔开发区给水工程设计说明计算书

Adstrect：3.7 liquid chlorine disinfection calculation

(1) design parameters

Water plant design water;

The design of the chlorine is determined by the maximum amount of chlorine, so the design is taken.

(2) chlorination:

Chlorine is not less than 30min in contact with water. This design is 40min.

(3) chlorine content:

The design is based on the maximum amount of 15d ~ 30d, which is 25d.

Design with capacity of 500 kg of liquid chlorine steel cylinder welding (its shape dimension is 600, H = 1.8 m), a total of five. In addition, the chlorine bottle is placed in the middle to precipitate the impurities in chlorine gas, and also prevents water from flowing into the chlorine bottle.

In order to ensure the safety and measurement of chlorine disinfection, chlorine is used in the design of the 2j-2 rotor and chlorine machine. Chlorinated Kg/h, external dimension wide by height = 330 by 370.

The size of the chlorine is 2m by 8m.

(4) the precautions assigned by chlorine

1) the chlorine is normally located near the site of the investment.

2) in addition to chlorine, there should be a toolbox, repair kit and gas mask. The switches for lighting and ventilation equipment should be set outside;

3) the chlorine should be equipped with a scale as the school's nuclear equipment, and the scales should be flat to the ground so that the chlorine bottle can be placed.

4) the ventilation equipment should be set for 12 times per hour between chlorinated and chlorine bottles, and the ventilation tube should be considered for anti-chlorine corrosion. The exhaust vent should be located in the lower part;

Liquid chlorine warehouse should set up a chlorine leak alarm.

The design of the water bath is calculated

3.8.1 pool volume

Village water distribution pipeline network of water supply, no regulation structures in the reason clear water reserviors effective volume Wc by 10 to 20% of the highest daily water, clear water reserviors have been computed in the middle of the water in front of the calculation of volume:

W = 23042 m3

The pool is divided into two, H = 4m, the design medium ultra high is 0.5 m, single pond area:

The rectangular reinforced concrete cistern with a size of L * B = 52m by 50m = 2600, H = 4m, and ultra high is 0.5 m.

3.8.2 water piping and arrangement

(1) assign requirements:

1) the pool should be properly arranged so that the water can be circulated regularly and avoid dead water areas. In and out, the water pipes are set separately in different parts.

2) feed line level should be considered to avoid because of the pool water level change and formation pressure pipe gas resistance, can be in inlet pipe into the pool with bend after bend, overflow diameter and inlet pipe, tube is not installed on the valve, pipe end bell, exports should set net, disease prevention and control of insect in the final;

3) all the cisterns are underground, considering the overflow well and the drainage well, in case the water is polluted.

4) the thickness of the earth's water is 0.5 ~ 1.0 m.

5) the bottom of the clear water reserviors should have a certain slope, and drainage sump, outside vent pool highly appropriate decorates a jagged, facilitate air natural convection, overhaul Kong Yi into diagonal decorate, and no less than two.

Key word:filter chlorine Residual chlorine

关键词：滤池 加氯 余氯

目录

绪论 5

1.1水资源现状 5

1.2存在问题与解决方法 6

设计说明书 6

2.1 概述 6

2.2设计原始资料 8

2.2.1自然条件 8

2.2.2、城市概况 10

2.3水源选择和方案比较 11

2.3.1取水工程 11

2.3.2净水厂设计概要 12

2.3.3加药系统的概述 13

2.3.4加氯系统的概述 13

2.3.4.3液氯投加的设计要点 14

2.3.5混合设备 14

2.3.6 网格栅条絮凝池 14

2.3.6.1絮凝池设计要点 14

2.3.6.2絮凝池的选择 15

2.3.7平流沉淀池 16

2.3.8普通快滤池 16

2.3.9清水池 17

2.3.10送水泵房 18

2.3.11水厂平面以及高程布置 18

2.4输配水官网设计概要 18

2.4.1输配水管渠定线原则 18

2.4.1.1线路选择与布置要求 18

2.4.1.2配水管网布置 19

设计计算书 19

3.1设计用水量 19

3.1.1用水量计算 19

3.1.2各项用水量计算 20

3.1.3最高日用水量 21

3.1.4清水池容积 21

3.2取水工程 23

3.2.1 取水构筑物选取 23

3.2.2进水室设计 24

3.2.3吸水室设计 24

3.3 一级泵站设计 25

3.3.1 设计流量确定 25

3.3.2 水泵扬程计算 26

3.3.3 水泵的选型 26

3.3.4一级泵房设计 26

3.3.4.1 基础尺寸计算 26

3.3.4.2吸水管路和压水管路 27

3.3.4.3 泵房各部件间距 27

3.3.4.4泵房各工艺标高的确定 28

3.4絮凝池计算 29

3.4.1加药间的设计计算 29

3.4.2絮凝池的设计计算 34

3.5 沉淀池计算 38

设计计算 38

3.6滤池设计计算 42

3.6.1设计参数 42

3.6.2滤池设计计算 42

3.7液氯消毒计算 49

3.8清水池设计计算 50

3.8.1清水池容积 50

3.8.2清水池配管及布置 50

3.9二级泵站 52

3.9.1 设计流量确定 52

3.9.2 水泵扬程计算 52

3.9.3 水泵的选型 53

3.9.4 泵房尺寸设计 53

3.9.5 泵房各部件间距 54

3.9.6 泵房建筑高度 55

3.9.7 吸水井设计 56

输配水官网设计计算 56

4.1输水管的设计计算 56

4.2比流量的计算 58

4.3远期平差 58

工程造价 82

5.1工程概算 82

结论 85

致谢语 86

参考文献 86

附录 88

绪论

1.1水资源现状

毕业设计是一次对学生4年来所学的最终考核，通过这次考核来增强学生们综合知识的应用，同时也能培养我们独立自主解决问题的能力，虽然其中老师也会有所指导，不过大部分都是由学生们单独完成。这一次毕业设计要求我们完成一次城镇给水设计，虽然只是初步设计，不过也有许多难点，从最开始的用水量计算，到最后的给水厂设计布置以及整个工程的概预算，可以想象其中的难度，不过相信在老师的指导下，以我们大学这些年所学的知识，一定能给出一份完美的答卷。

给排水最先出现在十九世纪中期的西方国家，不过早期的系统比较简陋，并且前期由于排水系统也过于简单，导致排除的污水污染水体，导致水源水质下降。经过多年的发展，各种给水系统和给水规范的出现使得给水行业发展迅猛，现今已经摸索除了成熟的给水方案。