湖北省随州市曾都区南部排水工程设计毕业论文
2021-10-24 16:31:12
摘 要
本次设计是为湖北省随州市曾都区南部设计一套完整的排水系统,包括雨水管道、污水管道的设计和污水处理厂厂区布置,并给污水处理厂选择一套合理经济的污水处理工艺。
由于环保要求的提高,传统的合流制排水系统已经不能满足环境保护和绿色发展的要求,充分结合雨水和污水各自的特点,本设计采用分流制排水系统,经查阅资料知湖北省随州市曾都区南部地形为东高西底,为合理利用地形优势,污水和雨水管道均采用重力自流,管道沿道路敷设方便施工,其中污水采用一根主干管自东向西排入位于西北方向的曾都区南部污水处理厂,雨水根据就近原则就近后排入涢水河中,其中由于初期雨水所含杂质较多,有一定的污染性,故在雨水管末端设置雨水调蓄池,经管道集中送入污水处理厂,经处理后再排放。
查询湖北省随州市曾都区南部的水文资料,确定当地最新暴雨强度公式为q0=1023(1 0.8lgP)/(t1 t2)0.65,根据当地实际情况,设计重现期取2年,地面集水时间取10min。
对管网及厂投资进行初步估算估算,计算污水处理厂建设成本和运行成本,初步计算工程投资总量。
根据查阅的有关资料,在本次设计中完成了随州市曾都区南部排水管道系统、污水处理厂的设计与计算,绘制A1图纸8张,完成设计说明书和设计计算书各一份。
关键词:湖北省随州市曾都区南部城区排水工程、分流制排水系统、CASS工艺、初期雨水处理
Abstract
This title of this graduation project is to design a complete drainage system for the southern part of Zengdu District, Suizhou City, Hubei Province, including the design of rainwater pipes and sewage pipes and the layout of the sewage treatment plant and choose a reasonable and economical sewage treatment process for the sewage treatment plant.
Due to the improvement of environmental protection requirements, the traditional combined drainage system can no longer meet the requirements of environmental protection and green development, fully combining the respective characteristics of rainwater and sewage. This design uses a split drainage system. According to the information, it is known that the southern terrain of Zengdu District, Suizhou City, Hubei Province is east high and west bottom. In order to make reasonable use of the terrain advantages, the sewage and rain pipes are gravity gravity, and the pipeline is laid along the road to facilitate the construction. Discharge to the west of the Zengdu District Sewage Treatment Plant in the northwest. According to the principle of proximity the rainwater is discharged into the Yunshui River. Since the initial rainwater contains many impurities, it has a certain degree of pollution, so rainwater is installed in to the storage tank at the end of the rainwater pipe, and will be sent to the sewage treatment plant through the pipeline, and then discharged after treatment.The climate belongs to the northern subtropical monsoon climate, with abundant rainfall, sufficient light, four distinct seasons, the same season of rain and heat, long frost-free period and so on. The southeast wind is dominant in summer and northwest wind in winter.
The short-term population in this design area is 40,000, and the long-term population is 60,000. The scale of long-term sewage treatment plant is 19,800 tons/day, and the scale of short-term sewage treatment is 12,600 tons/day. According to the characteristics of sewage treatment and discharge requirements,we choose a sewage treatment system with CASS pool as the core process. The main technological process is the advanced treatment of the effluent from the disinfection tank of the high density sedimentation tank of the lifting pump room with the fine grille / swirl sand settling tank / CASS tank in the inlet and middle grille inlet water pump room.
Query the hydrological data in the southern part of Zengdu District, Suizhou City, Hubei Province, and determine the latest local rainfall intensity formula is q0=1023(1 0.8lgP)/(t1 t2)0.65。According to local actual conditions, the design recurrence period is 2 years, and the ground water collection time is 10 minutes.
According to the relevant information consulted, in this design, I completed the design and calculation of the drainage pipeline system and sewage treatment plant in the southern part of Zengdu District, Suizhou City, drawn 8 A1 drawings, and completed a design specification and design calculation.
Key words: Drainage project in the southern urban area of Zengdu District, Suizhou City, Hubei Province, Shunt drainage system, CASS process, Initial Rain Water treatment.
目录
第一章 绪论 6
1.1 研究背景 6
1.2 目的和意义 6
1.3 国内外研究现状 7
1.3.1 国外研究现状分析 7
1.3.2 国内研究现状分析 7
第二章 设计说明书 8
2.1 设计原始资料 8
2.1.1 城市概况 8
2.1.2 自然条件 8
2.1.3设计任务及进度安排 9
2.1.4设计采用的主要规范和标准 10
2.2 排水方案设计 10
2.2.1 排水体制的选择 10
2.2.2 厂址位置选择 11
2.2.3 污水管网设计 11
2.2.4 雨水管网设计 12
2.3 污水处理设计 14
2.3.1 污水处理工艺的选择 14
2.3.2 工艺流程的确定 15
2.3.3 污水处理构筑物 15
2.4污水厂附属构筑物 17
2.4.1面积规划 17
2.4.2水厂定员 17
2.4.3附属构筑物 18
2.5污水处理厂平面布置 19
2.5.1布置原则 19
2.5.2污水厂平面布置 19
2.6污水处理厂高程布置 20
2.6.1布置原则 20
2.6.2污水厂高程布置 20
第三章 设计计算书 21
3.1 水量计算 21
3.2 处理构筑物设计计算 22
3.2.1 泵前中格栅 22
3.2.2 污水提升泵房的设计计算 23
3.2.3 泵后细格栅 25
3.2.4 旋流式沉砂池 26
3.2.5 CASS工艺设计 28
3.2.6 化学除磷用药量估算 32
3.2.7 深度处理提升泵房 33
3.2.8 高密度沉淀池 34
3.2.9 二氧化氯消毒 38
3.2.10 巴氏计量槽 40
3.2.11 配水井 41
3.3初期雨水处理 41
3.3,1雨水调蓄池 41
3.3.2中格栅 42
3.3.3细格栅 43
3.3.4曝气沉砂池 44
3.4污泥处理 45
3.4.1储泥池 45
3.4.2板框压滤机 46
第四章 污水厂附属构筑物设计计算 47
4.1 水厂总体面积的规划 47
4.2 水厂定员 47
4.3 水厂各构筑物及附属构筑物平面面积 48
第五章 污水处理厂的总体布置 49
5.1 污水处理厂平面布置 49
5.1.1 平面布置原则 49
5.1.2 污水厂平面布置 49
5.2 污水处理厂高程布置 50
5.2.1 高程布置原则 50
5.2.2 污水厂高程布置 51
第六章 污水厂处理工程投资估算 55
6.1污水厂工程投资W 55
6.2远期规划附加投资 55
6.2.3污水厂直接费用 55
6.2.4污水厂处理成本估算 56
第七章 总结 58
第八章 参考文献 59
附录 60
附表1 污水管网街区面积表 61
附表2 污水管网检查井标高表 62
附表3 污水管道设计流量方案 63
附表4 污水管道水力计算表方案 65
附表5 雨水管网街区面积表 67
附表6 雨水管网汇水面积表 71
附表7 雨水管网检查井标高表 76
附表8 雨水管网水力计算表 77
第九章 致谢 87
第一章 绪论
1.1 研究背景
在全球气候变化和快速城镇化背景下,大量富含营养元素甚至重金属的城市污水不经处理直接排放入水体,造成严重的水体污染和排放水体生态环境的破坏,粗放型的城市排水方式破坏了原有的水体生态循环系统,过多营养物质的排导致藻类的爆发,造成了严重的水环境污染,对水生态环境造成了破坏。随着国内大部分收纳水体环境容量减小,人们环保意识的增强以及愈发严格的环境政策促使我们寻求更加科学完善的市政建设体系,以推动经济,环境的可持续健康发展。同时也由于排水设施的相对落后,中国城市洪涝灾害日益严重,2016年夏季武汉等地区发生了严重的城市内涝,给当地居民的生命财产安全造成了巨大的损失。如何建立科学有效的排水系统逐渐引起了人们的重视。根据设计资料,本设计以湖北省随州市曾都区南部地区作为设计对象,设计一套污水处理系统,以使污水和雨水得到有效收集处理并达到排放标准已实现可持续发展。
1.2 目的和意义