排水工程课程设计学院：水利与环境学院专业：给排水科学与工程学生姓名：学号：指导教师：***二〇二二年四月二十七日摘要：设计的主要任务是某日处理规模2万立方米污水厂的设计。

污水处理工艺为A2/O改进工艺，污泥处理工艺为污泥浓缩脱水工艺。

该污水厂的污水处理流程为：从格栅提升泵房到沉砂池，进入前置缺氧、厌氧池-缺氧池-好氧池，然后进入中进周出辐流二沉池，最后经过混凝沉淀池、V型滤池之后出水；污泥的流程为：从中进周出辐流二沉池排出的剩余污泥首先进入生物集泥池，剩余污泥再进入污泥调理池，最后经污泥脱水泵房后排出。

本文则主要介绍该工艺流程中的混凝沉淀池以及负责给它配水的配水井的相关设计计算。

关键词：城市污水；A2/O改进工艺；混凝沉淀池；设计计算Abstract：Main task of design is a daily processing of scale of 20,000 cubic metres of wastewater treatment plant design. Wastewater treatment process for A2/O to improve the process, sludge treatment technology for sludge thickening and dewatering processes. The sewage factory of sewage processing process for: from grid gate upgrade pumping station to sank sand pool, into Qian reset hypoxia, and anaerobic pool-hypoxia pool-good oxygen pool, then into in the into week out spoke flow II sank pool, last after mixed gel precipitation pool, and v type filter pool zhihou water; sludge of process for: from into week out spoke flow II sank pool discharge of remaining sludge first into biological set mud pool, remaining sludge again into sludge conditioning pool, last by sludge dehydration pumping station Hou discharge. This paper focuses on the process of coagulation sedimentation as well as give it distribution distributor box design.Keywords: city sewage；ameliorated A~2O process；coagulatory settler；design calculation目录摘要 (I)1 工程概况与设计条件 ....................................................................................................................... - 1 -1.1设计任务及要求 (1)1.2工程概况与设计条件 (1)1.2.1 厂址位置与建设地址............................................................................................................ - 1 -1.2.2 建设规模与服务范围............................................................................................................ - 1 -1.2.3 设计水质与处理目标............................................................................................................ - 2 -1.2.4 确定处理工艺流程................................................................................................................ - 2 -1.2.5 厂区高程、工程占地............................................................................................................ - 3 -2 设计任务基本参数........................................................................................................................... -3 -2.1主要技术经济指标一览表 (3)2.2设计进水水质及水质分析 (3)3 污水处理厂构筑物设计简介............................................................................................................ -4 -3.1污水处理构筑物设计 (5)3.1.1 中格栅和提升泵房（两者合建在一起）............................................................................ - 5 -3.1.2 细格栅和沉沙池.................................................................................................................... - 6 -3.1.3 沉砂池设计 ........................................................................................................................... - 6 -3.1.4 二沉池 ................................................................................................................................... - 8 -3.1.5 接触消毒池 ........................................................................................................................... - 8 -3.2污泥处理构筑物的设计计算 (10)3.2.1 污泥泵房 ............................................................................................................................. - 10 -3.2.2 污泥浓缩池 ......................................................................................................................... - 10 -4 混凝沉淀 ........................................................................................................................................ - 11 -4.1混凝剂投配设备的设计 (11)4.2溶液池 (12)4.3溶解池 (12)4.4投药管 (13)4.5混合设备的设计 (13)4.6设计流量 (14)4.7设计流速 (14)4.7.1 混合单元数 ......................................................................................................................... - 14 -4.7.2 混合时间 ............................................................................................................................. - 14 -4.7.3 水头损失 ............................................................................................................................. - 15 -4.7.4 校核GT值 ........................................................................................................................... - 15 -4.8往复式混凝池的一般规定 (15)4.9絮凝设备的设计 (15)4.9.1 絮凝池的参数选择.............................................................................................................. - 15 -4.9.2 絮凝池的计算 ..................................................................................................................... - 16 -5 斜管沉淀池设计计算说明书.......................................................................................................... - 18 -5.1斜管沉淀池 (18)5.1.1 斜管沉淀池的特点.............................................................................................................. - 18 -5.1.2 斜管沉淀池设计的一般规定.............................................................................................. - 19 -5.2设计参数 (19)5.3设计计算 (20)5.3.1 平面尺寸计算 ..................................................................................................................... - 20 -5.3.2 进出水系统 ......................................................................................................................... - 21 -5.3.3 沉淀池排泥系统设计.......................................................................................................... - 24 -5.4核算 (24)5.4.1 雷诺数Re ............................................................................................................................ - 24 -5.4.2 弗劳德常数Fr ..................................................................................................................... - 25 -5.4.3 斜管中的沉淀时间.............................................................................................................. - 25 -6 环境保护 ........................................................................................................................................ - 25 -6.1设计采用的环境保护标准 (25)6.2环境保护范围 (26)6.3主要污染物及污染物分析 (26)6.4对环境影响的对策 (27)7 .劳动保护 ........................................................................................................................................ - 28 -7.1设计依据 (28)7.2生产工程中职业危害因素的分析 (28)7.3职业安全卫生设计中将采用的主要防范措施 (28)参考文献............................................................................................................................................ - 30 -1工程概况与设计条件1.1设计任务及要求通过污水厂课程设计，巩固学习成果，加深对排水处理课程内容的学习与理解，掌握污水厂设计的方法，培养和提高计算能力、设计和绘图水平。