6kV电抗器加装旁路开关的节能效果

本文就6kV电抗器在运行中存在的优缺点进行分析，找出降低电抗器能耗和改善供电环境质量的措施。并采用电抗器两端并联FSR高速开关，实现了节能降耗。     

限流电抗器在沿海钢铁企业配电室的应用分析

电压是电能质量的重要指标,电压质量对电力系统的安全与经济运行有重要的影响,钢铁企业一般为连续性生产单位,对供电系统的可靠性、安全性要求很高.为了解决某10 kV变电站系统故障时造成上级110kV变电站母线电压下降幅度大,采用增加限流电抗器方式,限制短路电流,提高母线残压,保证系统稳定供电,避免保护动作时间内,因压降造成...     

干式空心电抗器故障分析及预防措施

通过总结现场干式空心电抗器发生的短路放电、电树枝爬电、断股等故障情况,分析故障原因,并结合现场实际情况提出预防措施及日常运维工作的注意事项。     

一起35 kV干式电抗器匝间短路故障分析

通过分析一起35 kV干式电抗器匝间短路故障,阐述了干式空心电控器常见的故障隐患和产生原因,提出了日常维护要点和运行注意事项.     

降压变电站电抗器烧毁原因分析及改进措施

对太钢降压变电站烧毁限流电抗器事故原因进行了技术理论分析,采取改进电抗器与断路器接线方式的措施,消除了系统隐患。     

降压站电抗器烧毁原因分析及改进措施

对烧毁电抗器事故原因进行了技术理论分析并采取改进措施消除了系统隐患。     

大容量高速开关在钢厂余热发电机组的应用

结合工程实例分析了大容量高速开关的工作原理,针对其优缺点进行了探讨,对大容量高速开关装置的选用提出了参考意见。     

限流电抗器与可恢复式大容量高速开关装置的组合应用

针对串联限流电抗器在运行中存在耗能及影响系统稳定等问题,将电抗器与大容量高速开关组合成新的装置,该装置能在系统短路后7～15 ms内切断电流,同时还具有开断能力强、使用寿命长、动作可靠性高、动作分散度小、合闸无反弹等特点。     

附加电抗器（SR）电弧炉熔化期供电优化模型

大冶特钢采用一次称样、溶样、不分离基体、以塞曼校正方式分析铜合金中Sn、Fe、Pb、Sb，以垂直于磁场的偏振光束分析Zn。     

60MVA电炉变压器电抗器故障分析与处理探讨

本文介绍了舞钢60MVA电炉变压器电抗器存在的问题,对故障原因进行了分析探讨,并结合生产实际提出了处理方法和建议。     

72000kVA镍铁电炉的设计

结合缅甸达贡山项目工程实际,介绍了72 000 kVA镍铁电炉炉体和配套电极装置的结构特点.     

自饱和电抗器控制绕组的改造

从自饱和电抗器调压的原理分析着手，针对原电抗器控制绕组、位移绕组结构配置在设计及制造上的缺陷，阐述了电抗器控制、位移绕组由内外配置改为上下分层配置的理论及改造实践。     

炼油热壁加氢反应器用超纯净焊材用钢

因反应器在 32 0～ 5 5 0℃ ,14～ 2 2MPa和加氢条件下使用 ,炼油厂热壁加氢反应器筒体焊缝材料3Cr 1Mo 0 .2 5V ,2 .2 5Cr 1Mo V ,9Cr 1Mo等钢均要求高的纯净度 :P≤ 0 .0 0 3% ,S≤ 0 .0 0 3% ,H≤ 2× 10 - 6 ,O≤ 30×10 - 6 ,N≤ 80× 10 - 6 ,回火脆化敏感系数J =(Si+Mn) (P +Sn)× 10 4 ≤ 10 0 % ,X =(10P +5Sb +4Sn +As)× 10 - 2 ≤15× 10 - 6 。讨论了超纯净度焊材用钢生产工艺和研发的可行性。     

大型板坯步进梁式加热炉烟囱的优化设计

对大型板坯步进梁式加热炉上排烟烟囱的设计进行了系统优化.通过采取各种措施降低烟道阻力损失,提高烟囱抽力和安全性,并对上排烟钢结构烟囱的工程应用提出了建议.     

新型线材拉拔机的设计

介绍了一种先进的新型线材拉拔机,分析了该设备的拉拔、退火、张紧装置和动盘收线四个主要步骤的工艺及设计特点.该新型设备具有拉拔范围大、拉拔精度高、断线率低、生产效率高等优点.该拉拔机生产铅线和铝线.     

Photochemical Remediation of Tetrachloroethylene: Reactor Design, Construction, and Preliminary Results

A custom designed pilot-scale photochemical remediation reactor is constructed for remediation of vapor-phase volatile organic halocarbons (VOHs), particularly chlorinated hydrocarbons such as PCE (tetrachloroethylene). Ultraviolet (UV) light, when emitted at an effective absorption frequency, cleaves a VOH’s carbon-chloride bond, transforming harmful contaminants to harmless products. The stainless steel reactor is of tubular-shape with an inner diameter of 32 cm and a length of 105 cm. The net volume of the reactor is approximately 73.7 L. Three stainless steel baffles are welded inside the reactor to create a well-mixed vapor phase and uniform UV contact time. Special low-pressure mercury amalgam UV lamps (Heraeus, Inc., Duluth, Ga.) are used as the photoenergy source. Two independent vapor-phase PCE destruction experiments are conducted using different influent contaminant concentrations. Both experiments show a PCE destruction efficiency of over 99%.     

Framework of Success Criteria for Design/Build Projects

Success has always been the ultimate goal of every activity, and a construction project is no exception. Due to the ambiguous definition of project success and the different perceptions of participants toward this concept, it may be difficult to tell whether a project is successful as there is a lack of consensus. Time, cost, and quality have long been the success criteria used to evaluate the performance of a construction project. However, such a list has been criticized as not being comprehensive. Even studies of the project success of a particular construction method, such as the design/build procurement system, are lacking in most previous research considering construction projects in general. This paper sets out to establish criteria for project success for a design/build project in construction, first by identifying relevant measures of project success for a construction project in past studies, with particular emphasis on design/build projects, and then by establishing a comprehensive assessment framework for project success for design/build projects. The significant impacts on the construction field of study, in terms of educational value and practical use, are also presented. With little research in the project success of design/build projects, the writers suggest a research focus for the study.     

加氢反应器用大厚度12Cr2Mo1VR钢板的研制开发

介绍了加氢反应器用大厚度12Cr2Mo1VR钢板的生产工艺和主要技术难点,通过两次正火+回火的热处理工艺,促进了晶粒细化和组织均匀性,成功研制开发出182 mm厚度12Cr2Mo1VR钢板。钢板的综合力学性能及晶粒度均满足技术要求。     

Communicating Design Quality Requirements for Public Sector Design/Build Projects

This paper reports the results of a research study focused on how public sector owners articulated the requirements for design quality management in design/build (DB) projects. The research used the content analysis of 75 DB requests for proposals located in 35 states with an aggregate contract value of over $700 million with the mean price per project at roughly $15 million. The projects came from seven federal agencies as well as several state agencies. It found public owners are not availing themselves of the opportunity to evaluate design-builder design quality management plans and are primarily relying on the qualifications evaluation process to ensure design quality requirements will be met. Additionally, virtually all of the public owners in the sample neglected to require constructability reviews as a design quality management requirement in spite of the published benefits of this type of review. Finally, the paper concludes this area is one where a great deal of improvement for practitioners remains and the reason for a lack of focus on design quality in DB projects is due to a failure to shift the owner’s procurement culture from traditional project delivery to DB.