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1、重庆大学本科学生毕业设计（论文）渝东南某城镇排水工程设计（任务三）全套图纸加扣3012250582 学 生：学 号：指导教师： 专 业：给排水科学与工程重庆大学城市建设与环境工程学院二O一六年六月Graduation Design(Thesis) of Chongqing UniversityDesign of Drainage Works of Task ThreeUndergraduate: Supervisor: Prof. Major: Science & Engineering of Water Supply and DrainageFaculty of Urban Construc
2、tion & Environmental Engineering,Chongqing UniversityJune 2016重庆大学本科学生毕业设计（论文） 摘要摘 要根据设计任务书原始资料，对重庆市黔江区排水管网及污水处理厂进行 设计。重庆市黔江区位于重庆市的东南边缘，地处武陵腹地，以喀斯特地貌为主。 本设计组团为黔江区正阳组团，该组团受冬季风和夏季风影响，主导风向为偏东 北风，次主导风向为偏西南风。正阳组团规划近期人口 6 万人（2016 年），远期人 口 12 万人（2020 年）。渝东南某县城（正阳组团）排水工程包括城市排水管网设计工程和污水处理 厂设计工程。正阳组团排水管网采用雨、污
3、分流制。污水经管网收集输送至污水 处理厂，处理达标后排放入大湾河水体，雨水通过管渠就近排放至水体，防洪标 准采用 20 年一遇防洪标准。排水管网按远期人口规模设计。污水处理厂设在城区 西南端。正阳组团水污染源主要为生活废水，次之为工业污染源。工业废水达到污 水排入城市下水道水质标准（CJ30821999）后，允许排入城市排水管网。污水 处理厂出水水质标准采用城镇污水处理厂污染物排放标准（GB189182002） 中的一级 A 标准。污水处理厂污水处理工艺采用奥贝尔氧化沟工艺，处理流程为：进水粗格栅提升泵房细格栅沉砂池奥贝尔氧化沟二沉池网格絮凝池斜管沉淀池接触池滤布滤池接触消毒池出水。污泥处理处
4、置工艺采用重力浓缩脱水压滤脱水，脱水后污泥进行外运农用， 污泥处理上清液回流至厌氧池。污水处理厂近期设计规模 2.0万m3 / d ，远期设计规模为 3.8万m3 / d ，远期总占 地 8.0 公顷，污水处理厂建设按远期设计，近期建设，并预留远期用地。关键词：排水管网，雨污分流制，污水处理，奥贝尔氧化沟，污泥处理处置重庆大学本科学生毕业设计（论文） ABSTRACT ABSTRACTQianjiang, is located in the southeast edge of Chongqing, located in the Wuling mountain hinterland, the p
5、hysiognomy of which mainly appears in highland, with karst landform. The whether is influenced by monsoon in winter and summer. The dominant wind direction is a deflection of northeast, and the secondary is a deflection of southwest wind. The population scale of Zhengyang housing cluster is 8,000 in
6、 2015, and up to 12,000 in 2020.The drainage project of Zhengyang housing cluster consists of two part, the drainage system and wastewater disposal. Separated drainge system is adopted in this project, in which the rainwater is passed through a different drain from the sewer containing the swage. Th
7、e sewage is collected and carried to the sewage treatment plants, and released into the water afeter proper disposal. While the rain water is discharged into the nearby water directly through the pipeline without any disposal. The flood contral standard is the high flood level which is expected to h
8、appen during twenty years. The drainage system is designed in the population scale in 2020. The wasterwater treatment plant is planed to build in the southwest of Zhengyang housing cluster,Domestic wastewater constitutes the most important part of the water poulltion resources. And the industrial ef
9、fluent is the second one. Industrial waste water are allowed to the municipal sewer when the wastewater reach Discharge standard for municipal wastewater (CJ 30821999). The wasterwater after disposal should meet the criterion about “Wastewater Standard for Municipal Wasterwater Treatment Plants” (GB
10、18918-2002).Orbal Oxidation ditch activated sludge system is adopted in the sewage treatment plant. And the process of wastewater disposal in the plant is as the following: water inflow coarse screening pump station fine screening grit chamber anaerobic tank Orbal Oxidation ditch tank contact chambe
11、r water discharge. And the process of sludge disposal in the plant is as the following: Sludge gravity enrichmentSludge anaerobic digestionDewatered sludge. The sludge was used to the farmand, and the supernatant of which is feedback to the Anaerobic tank.The scale designed of the wasterwater plant
12、is 20,000 m3/d in the near future, and 38,000 m3/d in the specified future. The forward total standing of the plant is 8.0ha. Sewage treatment plant is designed at the forward scale, and is constructed at the recent scale, and set aside land for long-term.Key words： Drainage system，Separated drainag
13、e system, Water disposal, Orbal Oxidation ditch , Sludge disposal重庆大学本科学生毕业设计（论文） 目录 引言1第一部分 设计说明书3 1概述31.1 设计依据31.1.1 现状概况31.1.2 城镇概况31.1.3 规划依据51.1.4 规划目标、原则与理念61.2 设计内容7 2排水管网设计82.1 设计原则82.1.1 排水系统的体制及选择82.1.2 工业废水的处理与排放92.1.3 污水处理厂个数和厂址的选择92.1.4 跌水井的设置原则92.1.5 检查井的设置原则102.2.1 确定排水区界，划分排水流域112.2.
14、2 管道定线112.2.3 污水管道的水力计算112.2.4 污水干管的敷设方式、管材、接口及管道衔接132.2.5 污水主干管主要工程量表132.3 雨水管渠设计142.3.1 管渠定线142.3.2 管渠水力计算142.3.3 雨水管渠的敷设方式、管材及接口172.3.4 雨水管渠主要工程量表17 3污水处理厂工艺设计183.1 污水处理厂设计规模183.1.1 污水处理厂设计规模确定183.1.2 污水处理厂设计流量193.2 污水处理程度的确定193.2.1 设计进水水质指标203.2.2 设计出水水质指标203.2.3 处理程度203.3 污水处理厂工艺流程213.3.1 工艺流程方案选择21
