金肯学院毕业设计
**职业技术学院
毕业设计
（****级）
题目 **县污水处设计
系别 建筑与土木工程 专业 给水排水工程 学生姓名__ _ __学号_
指导教师____ ___ ___________________ 顾问教师___ ________________ _
二○一一 年12月
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金肯学院毕业设计
1 设计说明书 ...................................................................................................................................6
1.1 设计任务 ..............................................................................................................................6 1.2 设计要求 ..............................................................................................................................6
1.2.1 设计原则 .....................................................................................................................6 1.2.2 设计依据 .....................................................................................................................6 1.2.3 设计内容 .................................................................................................................- 7 - 1.3 水质分析 ..........................................................................................................................- 7 -
1.3.1 进水水质 .................................................................................................................- 7 - 1.3.2 出水水质? .............................................................................................................- 8 - 1.4 去除率计算 .......................................................................................................................- 8 - 1.5 工艺选择 ..........................................................................................................................- 8 -
1.5.1 方案对比 .................................................................................................................- 9 - 1.5.2 工艺流程 ............................................................................................................... - 10 - 1.6 污水处理构筑物设计说明 ................................................................................................ - 10 -
1.6.1 格栅 ...................................................................................................................... - 10 - 1.6.2泵房....................................................................................................................... - 12 - 1.6.3沉砂池 ...........................................................................................错误！未定义书签。 1.6.4 沉淀池 .................................................................................................................. - 14 - 1.6.5 A2/O反应池 ........................................................................................................... - 16 - 1.6.6 接触池 .................................................................................................................. - 17 - 1.6.7 计量堰 .................................................................................................................. - 18 - 1.7 污泥处理构筑物设计说明 ................................................................................................ - 18 -
1.7.1 污泥处理的意义 .................................................................................................... - 18 -
1.7.2 污泥处理流程 ........................................................................................................ - 18 - 1.7.3 污泥浓缩 ............................................................................................................... - 18 - 1.7.4 污泥脱水 ............................................................................................................... - 20 - 1.8 污水处理厂平面及高程布置 ............................................................................................ - 20 -
1.8.1 平面布置 ............................................................................................................... - 20 - 1.8.2 高程布置 ............................................................................................................... - 21 -
2 设计计算书.................................................................................................................................- 1 -
2.1 设计基础数据的确定 ....................................................................................................... - 23 - 2.2 粗格栅 ............................................................................................................................ - 23 -
2.2.1 设计参数 ............................................................................................................... - 24 - 2.2.2 设计计算 ............................................................................................................... - 25 - 2.3 泵房 ............................................................................................................................... - 27 -
2.3.1泵房形式选择......................................................................................................... - 27 - 2.3.2泵房设计................................................................................................................ - 28 - 2.3.3 设计计算 ............................................................................................................... - 28 - 2.4 细格栅 ............................................................................................................................ - 30 - 2.5曝气沉砂池 ...................................................................................................................... - 32 -
2.5.1沉砂池主体设计 ..................................................................................................... - 33 - 2.6 普通辐流式初沉池 .......................................................................................................... - 34 -
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金肯学院毕业设计
2.6.1 设计计算 ............................................................................................................... - 35 - 2.6.2 进出水设计 ........................................................................................................... - 37 - 2.7 A2/O生物反应池....
......................................................................... - 39 -
2.7.1 污水处理程度的计算 ........................................................................................... - 39 - 2.7.2 设计参数计算 ........................................................................................................ - 39 - 2.7.3 A/O曝气池容积计算
2
............................................................. - 39 -
2.7.4 需氧量计算 ........................................................................................................... - 41 - 2.7.5供气量计算 ............................................................................................................ - 42 - 2.7.6空气管系统计算 ................................................................................................... - 43 - 2.7.7进出水设计 ............................................................................................................ - 44 - 2.8 二次沉淀池 ..................................................................................................................... - 44 -
2.8.1 池体设计 ............................................................................................................... - 44 - 2.8.2 进出水设计计算 .................................................................................................... - 45 - 2.8.3刮吸泥机的计算： ................................................................................................ - 47 - 2.8.4二沉池集配水井 ..................................................................................................... - 48 - 2.9消毒接触池 ...................................................................................................................... - 48 -
2.9.1 消毒方法的选择 .................................................................................................... - 48 -
2.9.2设计计算................................................................................................................ - 49 - 2.10 计量设备....................................................................................................................... - 51 - 2.10.1概述 ..................................................................................................................... - 51 - 2.10.2计量堰尺寸设计 ................................................................................................... - 52 - 2.11污泥处理构筑物 ............................................................................................................. - 54 -
2.11.1 污泥浓缩 ............................................................................................................. - 54 -
2.11.2贮泥池.................................................................................................................. - 56 - 2.11.3污泥脱水间........................................................................................................... - 57 - 2.12 污水厂平面布置 ............................................................................................................ - 57 - 2.13 污水厂高程布置 ............................................................................................................ - 58 -
2.13.1 概述 .................................................................................................................... - 58 - 2.13.2 各种水头损失计算见附表。 ............................................................................... - 59 - 2.14 其他附属设施的设计 ..................................................................................................... - 59 - 参考文献...................................................................................................................................... - 60 - 3附录 ..................................................................................................................错误！未定义书签。
3.1外文翻译 .................................................................................................错误！未定义书签。
3.1.1外文原文........................................................................................错误！未定义书签。 3.1.2 中文翻译 ......................................................................................错误！未定义书签。 3.2附表 附表1 空气管路损失计算 .............................错误！未定义书签。
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金肯学院毕业设计
摘 要
水资源是经济可持续发展的基本保证，污水的任意排放或处理不彻底的排放，都会给水资源环境带来严重的污染问题。合理利用水资源是解决这些问题的关键，因此，水处理的发展对我国能否实现可持续的战略目标起着举足轻重的作用。
本设计是某县的排水工程。设计要求完成设计说明书一份、城市给排水系统总平面图、污水处理厂总平面布置图一张、污水厂污水与污泥处理高程图一张、污水总泵站或中途提升泵站工艺施工图一张，污水与污泥主要构筑物工艺图两张；单项处理构筑物工艺图设计中，主要是完成A2/O反应池的平面图和剖面图。该污水处理厂工程，总规模达到6万吨/日。
污水厂设计方案为：
污水处理流程：粗格栅 → 污水提升泵房 → 细格栅 → 曝气沉砂池 →初次沉淀池→ A2/O反应池→二次沉淀池→消毒接触池 → 计量槽 → 排放；
污泥处理流程：剩余污泥 → 浓缩池 → 贮泥池→ 提升泵房→污泥脱水机房 → 泥饼外运。
通过此设计，污水处理厂建成后，本市的水污染问题能得到较好的解决，产生良好的环境效益，同时也会收到很好的经济效益和社会效益。
关键词：A2/O；脱氮；除磷；城市污水处理厂
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金肯学院毕业设计
Abstract
Water resources ensure the sustaining development of economy. Sewage discharged at random or half treated can expose serious pollution to the water resources. The water resource of rational utilization is the key to solving these problems。So the development of water treatment plays a decisive role to realize our country the sustainable strategic objective.
The design is a drainage system in a town. During the preliminary design, we must complete a brochure, a map of general layout, an elevation map, a flow chart, a map of major equipment, piping layout; Construction of structures to deal with individual designs, is complete anaerobic-anoxic-aerobic tank plants and profiles. The sewage treatment plant project, the total amount to 60,000 tons/day.
The process of the wastewater treatment plant adopted is as following: Wastewater treatment process: medium bar screen → pump station → fin bar screen
→aeration
desilting
tank→the
preliminary
settling
tank
→the
anaerobic-anoxic-aerobic part→secondary sedimentation tank→ disinfection of contact pool→measurement groove → drain;
Sludge handling and disposal process: excess activated sludge → concentrated pool → sludge tank →pump station→ machine dewatering → disposal of sludge cake.
Water pollution problems of this city can be solved when the sewage treatment plant is completed. It has very good environmental benefits economic and social benefits.
Keywords: A2/O; removal of nitrogen; removal of phosphorus; Urban sewage treatment plant
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