管道直饮水工程的应用及特点分析

结合江苏某工程实例，介绍管道直饮水的特点、工艺以及对水质的要求和注意事项，以推动我国管道直饮水的发展。     

浅谈直饮水行业在我国的发展

随着国民经济的高速发展,人民群众对饮用水水质提出了更高要求,直饮水具有较大的市场需求和发展空间。本文对直饮水进行了简介,并对直饮水的发展历程与直饮水净化流程进行了阐述,对直饮水在我国的发展前帚提出了自己的看法。     

一种平危结合的膜法水处理设施研究

从供水系统柔性化建设出发,提出并设计了一种平危结合的膜法处理工艺和设施制造方法,为应对突然饮用水危机提出一种新思路.工艺方面根据平时直饮水用水需求,建立针对以市政自来水为源水的稳定的膜过滤工艺,保证过滤出水达到饮用净水水质标准(CJ 94—2005);根据危机时刻生活用水基本需求,建立针对危时应急储备水源为原水的"预处理+MF"工艺,保证过滤出水达到生活饮用水标准(GB 5749—2006).设备方面设计平危两用产水设备,使其能够通过合理组装,达到既能满足平时直饮水需求,必要时又能通过加装预处理满足危时生活饮用水需求.以自来水为平时源水,就近提取天津工业大学新校区人工湖水作为危时源水进行实验,结果显示,这种设施达到了平危两用的预期目标.     

渗透汽化在丙酮-丁醇发酵制备燃料丁醇中的研究进展

20世纪末的能源危机和环境问题促使人们对生物质发酵制备燃料丁醇的探索和研究,其中渗透汽化膜分离技术因其高效、节能、环保、便于和发酵过程耦合等优点,在燃料丁醇制备的过程中发挥着重要的作用.综述了用于生物质发酵制备燃料丁醇过程中的渗透汽化疏水膜和亲水膜的研究进展,对丙酮-丁醇发酵-渗透汽化耦合工艺进行了综述和分析,并对该领域未来的发展趋势进行了展望.     

18-8型不锈钢表面化学着色研究

18-8型不锈钢制品经化学着色后,可呈现五彩缤纷的装饰表面,使产品在国内外市场极具竞争力.对化学着色工艺和相关的技术问题进行了分析研究.指出:原材料的化学成分、组织状态、前加工工艺等均可影响着色效果.为获得18-8型不锈钢制品良好的彩色表面,还必须严格控制化学着色工艺参数.     

管壳式换热器管-管板焊接工艺的相关研究

管壳式换热器管-管板连接中采用了焊接工艺,目的是提高换热器管与管板的连接质量。焊接在管壳式换热器管-管板连接中具有一定的效益,其可加强管-管板的连接,避免出现裂缝、断裂的问题,维护了管壳式换热器的整体效果,体现焊接工艺的实践效益。本文主要以管壳式换热器为研究对象,探讨换热器管-管板焊接的相关工艺。     

GB/T 32842-2023《城市公共自行车交通服务规范》修订解读

本文旨在对新版GB/T32842-2023《城市公共自行车交通服务规范》进行解读，全面了解标准内容、编制背景、编制依据等。通过对标准的深入研究，了解我国城市公共自行车服务水平和服务质量，为城市公共自行车交通管理提供理论依据和实践指导。     

PLC在二次净水系统中的应用

本文针对直饮水在用户端经二次净水处理后供水压力及供水量不足的问题进行分析,采用恒压供水的办法解决供水压力不足问题,采用设置小型储水箱的办法解决二次净化速率过慢造成供水量不足问题,并定期将小型储水箱及用户端管道中直饮水返回二次净水系统再净化,达到高效节能、高安全卫生标准的直供水要求。     

碳化钨-钴涂层保护飞机

美国莱特-帕特森空军基地空军研究实验室通过了两项冷喷工艺，可用于高强度钢飞机零件的碳化钨-钴涂层保护。该两项工艺均已达到并通过电气飞机发动机公司为高速含氧燃料（HVOF）涂层制定的冶金标准，其中包括特殊涂层工艺公司开发出的激活燃烧高速空气燃料（AC-HVAF）涂层工艺和创新公司开发出的动力金属化（KM）工艺。     

机械镀锌-锰、锌-铝-锰合金工艺及镀层的耐蚀性能

为了获得性能良好的含锰合金镀层,以机械镀锌和机械镀锌-铝工艺为基础,通过调整活化剂和促进剂的种类及用量,开发了机械镀锌-锰合金工艺.利用该工艺可在钢基表面获得不同配比的锌-锰及锌-铝-锰合金镀层,对镀层进行了5%NaCl溶液喷雾加速腐蚀试验及全浸加速腐蚀试验,并与机械镀锌层进行了对比.结果表明,各种配比的锌-锰合金镀层的耐蚀性能优于机械镀锌层,且其耐蚀性随着锰含量的增加而增加;锌-铝-锰合金镀层的耐蚀性能比镀锌层提高数十倍.     

反渗透净水机水效标准研究

反渗透净水机作为一种有优质净水效果产品,在快速被市场接受的同时,高耗水的特点也日益引起社会的关注.本文重点介绍了反渗透净水机水效标准的制定方法和标准主要内容,该标准作为国家强制性标准,将对规范净水行业和社会节水具有重要意义.     

超滤技术用于饮用水、工业用水及废水处理

在世界范围内，膜技术越来越多地用于满足高质量供水的需求．由于饮用水中难以杀灭的，而又致命的细茵的历史性的爆发，人们发现膜可以作为去除这些细菌和病毒的安全屏障，从而被广泛用于引用水生产和供应．在废水处理领域，膜可以用于分离废水中的悬浮颗粒和物质，通过膜技术深度处理后的水可以回用．文章对超滤膜在饮用水、工业用水及废水回用方面的应用情况进行了综述．     

浅析饮用水嗅味评价标准化问题

本文总结和分析了国内外饮用水嗅味评价的标准化现状,指出了饮用水嗅味评价标准化工作中存在的主要问题在于嗅味标准物质数据库、嗅味评价标准、公众满意度测评方法等方面的缺失或不完善,并建议加强研究形成感官与量化指标相结合的饮用水嗅味评价标准,构建和完善饮用水嗅味评价标准体系.     

Ecological Risk Management of Drinking Water Project: The Case Study of Kunming City

Following rapid infrastructure development and industrialization, the problems of water pollution and water shortage have become more severe. Whether there is safe drinking water in cities has attracted wide attention.The ecological risk management of drinking water project is an important means of ensuring the safety of a drinking water source. Based on ecological risk assessment and management theories, this paper establishes an ecological risk management model and assessment system with the aim of providing theoretical guidance and scientific basis for formulating a policy on the safety and protection of drinking water sources in a city. Kunming is one of the cities plagued by severe water shortage in China. Its ecological risk management of drinking water has attracted the attention of both the local government and the public.Using Kunming as the case study, this paper conducts a comparative analysis and assessment on three major reservoirs that face ecological risks. It highlights the existing problems and gives helpful suggestions.     

超滤膜净化水库水试验研究

用中空纤维超滤膜处理哈尔滨附近B水库水,以替代混凝、沉淀、砂滤的传统自来水生产方法,研究生产饮用水的新工艺.研究了原水温度、浊度、操作压力和混凝剂的加入量对膜通量的影响.研究发现超滤膜通量与膜进水浊度的对数成反比,跨膜压力增大、适当加入混凝剂,膜通量增加.超滤出水和传统工艺的出水进行了比较,超滤膜出水浊度小于0.2 NTU,明显好于传统工艺的出水浊度.对超滤处理后的出水水质进行了全分析,超滤对铁、铝、锰、色度、好氧量、总有机碳等均有较好的处理效果,完全满足饮用水水质的标准.     

Potential for Riverbank filtration in India

Riverbank filtration (RBF) has been used for many decades in Europe and the United States to provide drinking water to communities located on riverbanks. In India, the development of RBF has the potential to provide drinking water to many cities located on the Ganga Plains currently using surface water as a source for their public water supply. Water diversion for irrigation and discharge of wastewater to rivers with extremely low flows has aggravated the water supply situation for many Indian cities using surface water. A number of Indian cities, with source waters of significantly varying quality, are already using RBF. In most of these cities no significant additional treatment is provided to the filtrate for their water supply. The objective of this article is to examine selected operating bank filtration sites in India (that have been investigated since 2005) and to elucidate additional potential RBF sites based on water problems and hydrogeologic suitability. A summary of selected operational RBF systems in Ahmedabad, Delhi, Haridwar, Mathura, Medinipur and Kharagpur, Nainital, Patna and Srinagar and their ability to produce potable water is provided. Analysis of the suitability of RBF for Allahabad, Bhubaneswar, Guwahati, and Vijayawada, based on hydrogeology and land use, is also provided.     

Review on river bank filtration as an in situ water treatment process

Surface and ground water are valuable sources for drinking water. Certain industrial, mining, and agricultural practices pollute these critical resources. Riverbank filtration (RBF) is a cost-effective in situ water treatment process, which removes suspended solids and organic and inorganic pollutants. The RBF process is defined as a natural filter of soils and aquifer sediments at the river site. In RBF, river water moves through the pores of the natural soils of the riverbed and riverbank. RBF improves several physical, chemical, and biological properties of the river water. Several treatment actions including, filtration, sorption, and biological degradation occur during this process. Under specific conditions, RBF could be used as a treatment or pretreatment process to remove or decrease pollutants in surface water. In this paper, the effectiveness of RBF in improving the river water quality is presented. RBF as a cost-effective water treatment process is also discussed. Furthermore, factors that affect the performance of the RBF process and its overall effectiveness for developing countries are also discussed.     

玻纤增强复合材料连续缠绕管材技术发展现状

复合材料连续缠绕管材凭借耐腐蚀、强度高等优势在市政饮水工程、输油管道、水处理、排污等领域具有广泛的应用。本文主要介绍了目前复合材料缠绕管材基体树脂的选型、缠绕工艺、生产设备和检测标准,对复合材料连续缠绕管材生产过程中可能出现的缺陷进行分析并归纳了现有复合材料管材的连接方式,最后对复合材料连续缠绕管材行业进行了总结与展望。      

集成膜过程

文章扼要阐述了部分集成膜过程在水净化、废液处理和清洁生产中的应用,如纯水和超纯水制备、饮用水净化、污水处理和回用、有机废水处理、乳清综合利用和海水淡化等,分析了集成膜过程的优势和广阔的应用前景。     

Exposures to 222Rn from consumption of underground municipal water supplies in Pakistan

This paper presents the results of radon ((222)Rn) concentration measurements in municipal supply drinking water in metropolitan Lahore city of Pakistan and evaluation of consequent radiological effects. In this respect, water samples were collected in all nine municipal towns of Lahore city and analysed employing a high-resolution gamma spectrometric system. Radon concentration varied from 2.0 +/- 0.3 to 7.9 +/- 2.1 Bq l(-1). Mean value of annual effective dose for an individual consumer was assessed to be 16.5 +/- 12.8 microSv y(-1). (222)Rn mean concentration measured in this study is comparable with the reported values for drinking water determined worldwide and found to be less than the limit of 100 Bq l(-1) recommended by the World Health Organisation for public water supplies. The results of this study may be helpful in establishing background levels of radon in drinking water that could be used not only to distinguish additional contributions when a contamination event occurs but also to implement water quality standards by the concerned authorities to maintain radioactive contamination free drinking water supplies for the population.