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1.
江门市丰乐污水处理厂处理规模为4万吨/日,采用前置反硝化上向流曝气生物虑池工艺.该工艺对自控系统要求较高。对自控系统的硬件配置及网络结构、软件组态、系统功能进行了介绍,其中结合曝气生物滤池工艺的特点,对几个关键工艺环节自控的实现进行详细的介绍。该厂投产以来,运行状况良好,自动化程度高。  相似文献   

2.
供水SCADA系统的研究与建立   总被引:10,自引:3,他引:10  
介绍了天津港保税区供水SCADA系统的建立过程,对该系统的结构、通讯方式、监控点位置和数据库等进行了设计。根据数据库的信息,重点对系统内水泵与闸阀的控制、供水管网中自控调节阀的控制及布置原则进行了研究。  相似文献   

3.
水处理自动控制系统的应用现状及发展前景   总被引:1,自引:0,他引:1  
介绍了水处理行业自控系统的常规方案,包括系统网络结构、系统结构与配置以及系统控制模式,并分析了水处理行业的发展趋势和对自控系统的需求,指出自控系统未来发展的主要方向:冗余的控制系统结构、PLC合理的通讯端口设置、组态软件丰富的驱动程序、专业程序模板、数据分析和决策支持、远程监控。  相似文献   

4.
随着对污水厂周边环境要求的提高,污水厂除臭处理已成为业界关注的焦点.介绍了污水处理厂恶臭物质的成分、来源及生物除臭的原理,并以某污水处理厂除臭工程为例,介绍了生物过滤除臭工艺气体收集、处理系统的设计参数及生化反应条件的控制方法,可为类似工程提供借鉴.  相似文献   

5.
中小型生活污水处理厂自控系统的建设   总被引:1,自引:1,他引:1  
张建华 《山西建筑》2006,32(12):156-157
阐明了建设自动化系统的目的,从中央控制室、控制分站、过程仪表、软件等方面介绍了中小型生活污水处理厂在自动化系统设计施工中应注意的问题,提出了自动化设备的维护方法,以发挥自控系统的应有作用。  相似文献   

6.
顾剑 《市政技术》2001,(3):54-57
本文介绍了方污水处理厂实现自动化控制的实践,论证了自动化系统对污水处理运行管理的重要作用,提出了智能化是自控系统发展方向的观点。  相似文献   

7.
天津开发区中水回用项目自控系统设计   总被引:4,自引:0,他引:4  
张轶  陈颉 《中国给水排水》2003,19(Z1):133-134
针对天津开发区中水回用项目设计了自控系统,从通讯问题对系统可靠性的影响、报警设置及处理、人机界面设计等几方面进行了讨论.  相似文献   

8.
黄翔  卢永梅  强天伟 《暖通空调》2012,42(3):119-122,82
介绍了蒸发冷却半集中式空调系统的流程。基于该系统不同季节的运行模式,设计了自控方案,以保证该空调系统的安全性和节能性。详细介绍了控制内容和硬件配置。利用组态软件完成PC机与PLC之间的通讯,实现了系统集中控制、数据记录和打印等功能,能为现场设备维护人员提供详细的资料,简化操作、维护工作。工程应用实践表明,该自控系统运行稳定,能达到预期效果。  相似文献   

9.
东北地区某粪便处理厂对处理过程中的粪便污水采用生化处理/膜处理/高级氧化/曝气生物滤池的处理方案。工程建立以监控计算机和现场控制分站为核心的集散型控制系统,并建立了与之相配套的检测仪表系统,从而保证粪便污水处理系统能正常、合理地运行。通过自控系统累积运行数据,对工况持续分析并调整,从而不断优化处理系统的运行。  相似文献   

10.
在南京城南污水处理厂一期新建工程自控系统的设计中,将以太网与现场总线相结合,实现了污水处理厂控制自动化、资源配置优化、管控一体化.实际运行表明,自控系统的运行稳定可靠,响应及时,达到了预期目标.  相似文献   

11.
污泥制砖存在问题浅析   总被引:2,自引:0,他引:2  
马宪军  于明  孙建华 《砖瓦》2013,(8):51-52
污泥制砖符合国家的环保政策,但在技术方面还待进一步创新和突破。为此分析了污泥制砖在技术方面、环保方面和社会大众认可方面存在问题及相应的改进措施。  相似文献   

12.
一、研究区域基本现状新疆地处欧亚大陆腹地,地貌轮廓表现为“三山夹两盆”,山地与平原的面积大致各占50%,镶嵌于戈壁沙漠的绿洲仅有7万平方公里。新疆土地面积166.49万平方公里,占全国总面积的六分之一。气候干旱,荒漠广布,是中国最大的干旱区,是亚洲干旱核心区,也是世界上著名的干旱区之一。水资源短缺,生态极度脆弱。新疆2004年底有1950万人,人均GDP已经超过了1000美元,城镇化进入了快速发展阶段,特别是小城镇的发展速度较快。但新疆特殊的干旱区绿洲环境,使得小城镇的发展存在许多问题。一是城镇规模小而散,基础设施配套差,城镇集散和…  相似文献   

13.
Nearly 1500 urine samples were collected from female farmers in eight regions widely scattered in the islands of Japan in the winter of 1987-1988. The samples were analysed for manganese by wet ashing and flameless atomic absorption spectrophotometry under strict quality control. The values observed after adjustment for a specific gravity of 1.016 were distributed log-normally with a geometric mean of 0.65 microgram/l and a geometric standard deviation of 2.47. There was no effect of aging or any effect of smoking on the urinary manganese concentration. The inter-regional difference may be present but not yet conclusive. As no sex difference was observed in a previous study, it may be possible to deduce that the value may possibly stand for the "background" level of both men and women, either smoking or non-smoking, among the general Japanese population. The observed value is discussed in comparison with values reported in the literature.  相似文献   

14.
Although the Dirección de General de Protección Civil (DGPC), an agency of the Spanish government, has been responsible for the collection of data and the statistical analysis of fires since 1985, it has not as yet issued any reports. It is true that a couple of studies have been made, but in neither case did they use a standardized methodology but relied simply on the heterogeneous information provided by the fire brigades which cooperated in the studies. At that time Spanish fire brigades did not have special units for professional fire investigation, nor was the information derived from standardized methodologies suited to research purposes. In addition, information was extremely scarce and basic, focussed only on the fire, the use of the building and personal data of the victims. In this context, the project for a Fire Investigation Unit in the Fire Brigade of Málaga (the sixth largest Spanish province in inhabitants) was set up. Although inspired in the methodologies used in the USA and in the UK, the aim was to create a customized methodology for the first scientific investigation of fires in Spain. Our research was conducted in 2007. Using the methodologies of the USA and the UK, our own methodological approach and the Spanish regulations, we drew up a questionnaire with 110 variables arranged into 6 modules. We studied 96 fires out of the 154 emergency fire calls received in 2007, having omitted some emergency calls for various reasons. Our results revealed that it was necessary to generalize the installation of fire extinguishers in residential buildings, to train the general public in the use of these devices, to promote the use of fire and smoke detectors in residential buildings, to encourage the inspection and control of old electric installations and to monitor the new installations, to generalize the implementation of emergency and evacuation plans and to design new systems and materials for the cabinets where hand-held extinguishers are stored.  相似文献   

15.
介绍了用双硫腙分光光度法测定水中余氯的新方法,阐述了其测定试验过程,根据试验结果显示,其结论符合国家标准,表明该方法可用于自来水等样品中余氯含量的测定,结果比较准确。  相似文献   

16.
Abstract

Inequalities relating to ownership of housing have become a major issue de jour in many Western societies. This article examines how the distribution of homeownership in Sweden relates to two factors widely seen as significant to such inequalities, namely parental tenure status and place of birth. We use longitudinal registry data to examine the bearing of these two factors on individual-level tenure progression since the beginning of the 1990s for persons at different stages of their housing careers. We extend existing understandings of Swedish homeownership patterns by demonstrating that inequalities relating to place of birth and parental tenure intersect with one another in ways that substantially advantage certain subgroups while disadvantaging others, and by demonstrating that experiences of entry into homeownership have in recent years been changing in markedly different ways for these different subgroups. Overall, Swedish homeownership inequalities, far from dissipating, appear to be hardening along existing lines.  相似文献   

17.
邹玭 《福建建筑》2013,(4):65-66
目的:花化、香化、彩化已成为城市园林绿化的主要趋势,也是为满足人们对环境要求越来越高的一种心境。方法:选择采用莳花能表现出品种繁多,色彩艳丽等不同的方式,从而能在很大程度上丰富了植物造景的层次感要求。结果:能使其达到美化环境、增添节日气氛、提高绿化品质等方面有着突出的作用。结论:莳花造景对城市的美化可达到立杆见影效果,从而提高城市的形象和品位。  相似文献   

18.
本文结合日本川崎市站前广场和神户市哈巴兰德地区的立体化再开发,分析介绍当前日本浅层地下空间开发利用的成就和特点。  相似文献   

19.
边坡稳定性的关键问题是确定最危险滑动面(潜在最危险滑动面)和边坡的稳定系数。国内外一般是采用先假定边坡滑移模式,然后近似确定最危险滑动面,再求近似的边坡稳定系数的方法来分析边坡的稳定性,但假设的边坡滑移模式难以反映边坡滑移的实际状态。因此本文探索利用遗传算法搜索最危险滑动面,并得到最小稳定系数及对应的最危险滑动面曲线,取得了较好的效果。  相似文献   

20.
针对地质情况复杂地区垫邻高速公路设计、施工中的具体问题,从地质预报的方法、原理方面入手,对地质情况复杂地区高速公路隧道施工中的地质超前预报工作进行了深入的研究,在分析归纳的基础上,提出合适的工作方法。  相似文献   

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