毕业设计（论文）浙江省义乌市苏溪镇排水工程设计.docx

设计总说明 近年来，义乌市实行“兴商建市”的城市发展战略，综合经济实力不断增强，城市化进程日趋加速，已基本确立了全国小商品流通中心的地位，具备了建设现代化商贸名城的现实基础。义乌市经济的快速发展，人口城市化进程加快，但是市政建设和污染防治滞后，已导致大量生活和工业污水未经处理排入江河，引起江河水环境的破坏和生态环境的损害。 本设计的设计目的是完善义乌市苏溪镇污水排放系统，改善现有恶化的水环境，减少对镇区和吴溪的环境污染。 规划镇区的常住人口和外来人口的总和约1.8万人，未来规划区人口总量约为3.50万人。城镇建设总用地为108.7公顷、而其中居住安排用地为88.08公顷。吴溪是苏溪镇最大的山溪性河流，河床坡降大，水量季节性变化较大，部分河段枯水期出现断流。因此，苏溪的水环境纳污容量非常有限，而镇区内居民、村民生活污水和工业企业的生产污水的排放 ，给苏溪的环境保护带来了巨大压力。本设计可以使苏溪的污水实现达标排放，排放的污染物可以得到大幅度的削减，这将大大改善吴溪的水环境质量，有利于促进生态市的建设和保护苏溪地区的水环境。 设计计算说明书中包括二部分：城镇雨污水管网设计计算和污水处理厂设计计算。主要内容有：城市排水系统确定、确定污水厂规模，选择污水处理工艺流程及主要构筑物的设计计算与高程计算，城镇雨污水主要干管、支管的设计流量及管径、高程计算。 图纸部分共10张，包括：工程设计总说明、污水干管平面布置图、雨水干管平面布置图、污水厂平面布置图、细格栅与沉砂池平剖面图、辐流式初沉池平剖面图、改良SBR平剖面图、浓缩池平剖面图、污水厂高程布置图，污水干管纵断面图。 Specification In recent years, Yiwu City, the implementation of Xing to build city urban development strategy, the comprehensive economic strength, increasing urbanization process accelerated, has been basically established a national hub for small commodities, with the construction of modern business city basis in reality. Yiwu citys rapid economic development, population urbanization, but municipal construction and pollution prevention lag, has led a large number of domestic and industrial waste water untreated into rivers, causing river water environmental damage and ecological damage to the environment. This design is designed to improve the Yiwu Suxi sewage system, improve the existing deteriorating water environment, reducing the township and Wu Xi environmental pollution. Planning township resident population and the total foreign population and about 1.8 million people, future planning area population of approximately 3.50 million people in total. Urban construction land of 108.7 hectares total, of which 88.08 hectares of land for living arrangements. Wu Xi is Suxi largest mountain river, riverbed gradient large seasonal variations in water greater part of the river dried up during the dry season. Therefore, the towns water environment Chian dirt holding capacity is very limited,