电子辐照加速器大功率工频高压电源

文章介绍目前两种用于烟气脱硫加速器的不同形式直流高压电源，分析了它们各自的特点。针对它们存在的不足之处，提出了一种全新的倍压型桥式整流线路，并对此线路进行了理论推导和计算机模拟仿真。     

Large-scale cooling towers as part of an efficient and cleaner energy generating technology

The present paper will outline the main aspects of the design and construction of cooling towers in Germany in the last decade. As part of electricity generating power plants, cooling towers play a significant role for the availability of reliable energy supplies, in a manner compatible with environmental requirements. They definitely belong to the largest and thinnest concrete structures at present. Because of the combined action of wind, thermal and moisture effects, special care has to be taken with regard to fatigue, cracking and corrosion to ensure an adequate level of safety and durability. Such a design strategy has been employed for the world’s tallest cooling tower at the Niederaussem power plant in Germany, with an overall height of 200 m and thickness values of 22–24 cm. Special considerations included the realistic non-axisymmetric distribution of soil characteristics, wind action due to interference effects (as determined by wind-tunnel tests), optimisation of the shell shape to improve structural and dynamic behaviour, injection of the cleaned flue-gas into the cooling tower, and the use of high-performance concrete (85 MPa) to improve shell resistance against acid attack by the cleaned flue-gas. The paper will present some results of an actual research project on this problem, which was conducted at the University of Wuppertal, to explore the use of high-performance concrete on design, stability and durability of cooling tower shells.     

微重力落塔电磁悬吊、释放技术研究

论述了微重力落塔电磁悬吊、释放、提升机构的关键技术,电磁释放过程的特性分析以及微重力落塔实际试验的情况。分析说明:悬吊、释放性能的好坏决定了试验落舱的微重力水平,也是微重力落塔试验能否成功的关键技术。     

倾斜水塔的爆破拆除

针对某部倾斜水塔的定向爆破拆除,从防止水塔倾倒偏移和筒体触地冲击地面对周围环境造成影响等不利情况,确定爆破方案和采取相应的防护措施.     

36 m 高砖砌水塔定向折叠爆破拆除

介绍了复杂环境中砖砌高大水塔的定向折叠爆破拆除.根据周围的环境情况,在施工中采用了开定向窗、挖定位坑等技术措施,确保爆破成功,达到了设计效果.     

填料萃取塔的操作性能及设计计算

系统地介绍了填料抽提塔的两相流动及传质特性，设计计算，对填料塔的设计和操作有一定指导意义。     

大庆油田助剂厂3500kt／a常减压减压塔的管道设计

简述了大庆油田助剂厂3500kt/a常减压减压塔的管道布置设计特点,体现出塔类设备的管道设计原则,并结合管道设计的经济性、安全性展开论述。     

Φ1000mm卡萨利氨合成塔内件故障分析及改进措施

针对Φ10 0 0mm瑞士卡萨利氨合成塔内件应用投产后出现触媒泄漏、系统阻力上升的问题 ,对其进行分析 ,查找问题存在的原因 ,提出技术改进措施 ,最终使装置运行稳定 ,达到并超过设计生产能力 ,取得较好的应用效果。     

公路桥涵台背设计的理论方法探讨

介绍了近年来国内外研究人员对桥涵台背的设计研究方法，结合桥涵与台背结构组合的设计原则，从搭板的型式、坡度、长度、厚度、配筋等方面提出了搭板设计的方法。     

丙烯腈吸收塔放空管道噪声控制

某石油化工总厂丙烯腈车间的吸收塔在放空负荷增大以后产生了较严重的噪声,对生产环境造成极大污染。为对丙烯腈吸收塔的放空管道实施噪声控制,改善工厂以及周边厂家的生产环境,进行了噪声控制方案设计及消声器设计。项目实施后,噪声绝对值降低了20分贝,噪声幅度降低达24％。