浅述排污入江管工程一些技术关键问题

Some Technical Problems In River Disposal Pipe Project of Pollutants

杭州市四堡污水处理厂排污入江管工程,由杭州市中东河综合治理总指挥部组建。这是污水处理厂十分重要的配套工程,它将城市工业及生活污水经一级处理后用排污管排入钱塘江,总排放量达7.5m^3/s,首次采用了江心河床淤积线以下排污方案,工程浩大,技术难度大,且国外无资料,国内又无先例。该工程在分析现场水文地貌的基础上,进行了一系列的物模和数模试验,对排污工程作了精心设计和施工。本文在陈述工程任务及地理位置、工程概况、排污管设置与高程设计、排污竖管与间距、管径、喷口结构等的同时,并联系其中的一些技术关键问题,作了一番浅述。

It is very important that polluted water in modern life and industry should be disposed well. The total flow of the polluted water discharged into the Qiantang River after the first disposal in Hangzhou Sibao Disposal of Sewerage Factory is 7.5m3/s. A method of discharging it under the river is adopted. This method needs a tremendous amount of work and is rather difficult in the technique. In order to finish this project, a series of experiments on physical and mathematical model has been done based on the analysis of the current hydrology and landforms. Moreover, a meticulous design and construction have also been made. In this article we introduce the survey of the project and explain some cruxes of the project. The arrangement of pipes, the number of spray nozzles, the diameter of pipes, the attitude of discharging flow of the structure of spray nozzles and so forth are discussed