基于雨水过滤井的老旧小区海绵改造途径探究

随着城镇化进程进入下半场,老旧小区凸显出配套设施不齐、内涝积水频发、违章搭建严重和停车位不足等问题,这类小区改造的民生需求日益迫切。该文着重分析老旧小区开展海绵改造面临的问题,基于国外广泛应用的过滤井技术,提出一种“过滤井+蓄水池”的组合方案,为老旧小区的海绵改造提供可行的建设方案。并以南京市某老旧小区为例,采用SWMM模型分析改造前后的径流和污染控制情况,以期为该改建模式提供科学依据。

农田灌溉用过滤井管成型系统建模仿真与优化研究

通过对农田灌溉用过滤井管成型系统进行受力分析得到系统的振动方程,结合振动方程并利用Pro/E建模导入ADAMS进行仿真,在主振弹簧刚度系数K和阻尼系数c给定的条件下改变驱动转速n来满足系统振幅与频率的要求,进而确定电机的转速和带传动的传动比i,为农田灌溉用过滤井管成型系统的设计提供了新的方法和理论基础。

沙石粘结过滤井管制造与应用技术

沙石粘结过滤井管是一种新型过滤井管，具有可挖性好，使用寿命长的优点，沙石粘结过滤井管在露天煤矿中得到了广泛的应用。本文对这种井管的生产设备、制造工艺过程及安装方法作了介绍。

深水井新型井管的优势及应用

目前,农村饮水井、灌溉机井主要使用钢筋混凝土井管和钢筋无砂过滤器（过滤井管）。钢筋混凝土井管由于其工艺简单、材料易取、成本低、寿命长等优点被广泛应用,适合井深为150-300m。井管钢骨在离心成型过程中容易开焊、弯曲,严重影响井管生产质量。同时在下井管过程中,拉力作用易使井管出现不规则裂纹,影响成井率及寿命。而过滤器虽种类比较多,但都要缠丝、包网,不仅增加了打井成本和劳动强度,如遇到井孔弯曲或井孔内探头石，

基于直饮水目标的供水水质提升战略思考

高标准供水水质,是市政供水行业长期追求的目标。从整体产业链的战略高度深挖本质,寻找破题之策,是当前国内供水行业重点努力的方向。日、欧、美等国家和地区通过多年实践,在优质供水方面取得了一定的成果,为我国的供水行业提供了经验和示范。本期邀请舒诗湖博士通过自身的思考与实践,基于直饮目标的供水水质提升,提出自己的战略思考。

关于桓仁县农村人畜饮水水源系统工程安全建设的研究

本文主要是对桓仁县农村人畜饮水水源系统工程安全建设问题进行了系统的研究,提出了水源工程应该选择建设在基流不过冰的地方,同时需要在水源井外围做两级防渗处理等新的实施理念,并运用到实际工程中,为供水水源能更好的满足一年四季农村人畜饮水需要提出保障。

Influence of Na^+,K^+,Mg^(2+),Ca^(2+),and Fe^(3+) on filterability and settleability of drilling sludge

Solid–liquid separation is a vital step in drilling sludge disposal, and the filterability and settleability of drilling sludge are the main evaluating indicators for the separation process. The influence of Na^+,K^+,Mg^(2+),Ca^(2+),and Fe^(3+) on drilling sludge filterability and settleability was investigated in our research. The water content,filtration rate, supernatant volume and supernatant turbidity were measured to evaluate the filterability and settleability of drilling sludge. Meanwhile, the zeta potential, specific surface area of sludge flocs, particle size distribution and Fourier-transformed infrared spectra were employed to clarify the influencing mechanism.The experimental results showed that the filterability and settleability of drilling sludge were related to concentration and types of cations. Mg^(2+),Ca^(2+),and Fe^(3+) performed better than Na^+, K^+, and the cations with smaller hydrated radius got superior solid–liquid separation behavior at same valence. Finally, the spectra indicated that no chemical adsorption occurred between inorganic cations and drilling sludge flocs. The variation of surface charge and flocs growth after adding different inorganic cations were the reasons for the changes of the filterability and settleability.

THE STUDY OF THE FILTRATION EFFICIENCY OF FILTER MATERIAL

In this paper, the course of the filtration is analyzed.In order to study the filtration efficiency of the filter material, the computer program was edited.According to the results of the computer program, some important parameters of the filter material are discussed.It shows that the filtration efficiency is closely related to the diameter (d) and the size (b) .In addition, by using these results and the computer program, we can analysis the relationship between the fiber structure and filter properties quantitatively.