高压蒸汽消化法测定废水化学需氧量的再研究

用＂自控式高压蒸汽消解器＂作为高压蒸汽消化法测定废水化学需氧量的消化装置,详细研究了消化条件,最后确定,消化体系中（１／６）Ｋ２Ｃｒ２Ｏ７浓度为０１ｍｏｌ／Ｌ,Ｈ２ＳＯ４浓度为１０．１ｍｏｌ／Ｌ,催化剂Ａｇ＋浓度为０．０３ｍｏｌ／Ｌ,消化温度为１３０℃,恒温时间为２０ｍｉｎ。用此方法和条件测定了１２种单纯有机化合物和１６种不同工业废水的化学需氧量,与标准回流法相比,相对误差在－５．５－６．０％之间。     

Experimental investigation on shock waves generated by pressurized gas release through a tube

An experimental investigation on the flow structures and the strength of shock waves generated by high-pressure gas release through a tube into air was conducted. The results demonstrated that a leading shock wave was generated in front of the compressed gas jet and the shock wave speed increased firstly, then decreased and finally kept constant with an increase of the propagation distance in the tube. The experimentally measured Mach numbers of shock waves were close to those calculated from the theory of ideal shock tube flow. After spouting out of the tube, the normal shock quickly developed into a hemispherical shape. The Mach disk was observed in the under-expanded jet. For high-pressure combustible gas release, the concept of theoretical critical pressure of ignition was introduced and several theoretical critical pressures of common gaseous fuels were obtained.     

Internal corrosion hazard assessment of oil & gas pipelines using Bayesian belief network model

A substantial amount of oil & gas products are transported and distributed via pipelines, which can stretch for thousands of kilometers. In British Columbia (BC), Canada, alone there are over 40,000 km of pipelines currently being operated. Because of the adverse environmental impact, public outrage and significant financial losses, the integrity of the pipelines is essential. More than 37 pipe failures per year occur in BC causing liquid spills and gas releases, damaging both property and environment. BC oil & gas commission (BCOGS) has indicated metal loss due to internal corrosion as one of the primary causes of these failures. Therefore, it is of a paramount importance to timely identify pipelines subjected to severe internal corrosion in order to improve corrosion mitigation and pipeline maintenance strategies, thus minimizing the likelihood of failure. To accomplish this task, this paper presents a Bayesian belief network (BBN)-based probabilistic internal corrosion hazard assessment approach for oil & gas pipelines. A cause-effect BBN model has been developed by considering various information, such as analytical corrosion models, expert knowledge and published literature. Multiple corrosion models and failure pressure models have been incorporated into a single flexible network to estimate corrosion defects and associated probability of failure (PoF). This paper also explores the influence of fluid composition and operating conditions on the corrosion rate and PoF. To demonstrate the application of the BBN model, a case study of the Northeastern BC oil & gas pipeline infrastructure is presented. Based on the pipeline's mechanical characteristics and operating conditions, spatial and probabilistic distributions of corrosion defect and PoF have been obtained and visualized with the aid of the Geographic Information System (GIS). The developed BBN model can identify vulnerable pipeline sections and rank them accordingly to enhance the informed decision-making process.     

300MPa超高压往复密封的试验研究

水切割设备的运行可靠性，在很大程度上取决于超高压往复密封。笔者对３００ＭＰａ超高压往复密封设计的是，采用锥形套筒与填料问置的组合密封，即利用锥形套筒的弹性变形在柱塞与套筒之间产生难以加工的间隙，造成很大的压降Ｐ，然后再利用填料密封。填料采用填充ＰＴＦＥ和铅箔。静密封也采用金属斜面密封。密封参数──压力：３００ＭＰａ，流量：２Ｌ／ｍｉｎ，介质：清水加３—５％乳化液，喷嘴直径：０．２５ｍｍ。     

关于“金与甘氨酸配合作用实验研究中的某些问题”的讨论─—答复周朝宪、季宏兵和王中良

分析了金与甘氨酸配合作用实验研究中的某些问题，包括甘氨酸的热稳定性，氧逸度的概念，样品管内的压力、样品管材料对实验的影响及配位数的确定。     

华北城市地区潜水中主要离子含量变化的反应途径模拟

近三十年来，由于污染，华北城市地区潜水中主要离子如ＣＡ＾２＋、Ｍｇ＾２＋等含量逐年升高，影响工农业生产，本采用反应途径模拟的方法对上述情况进行了研究，作共设计了７种反应途径，分别模拟了含碳酸盐或硅酸盐、铝硅酸盐较丰富地区地下水中盐效应和ＣＯ２分压升高对基主要离子含量的影响，模拟过程中考虑了２２种化学反应，３３种存在形式（包括气体、固体）。结果表明，盐效应和ＣＯ２分压升高对地下水中Ｃａ＾２＋、Ｍ     

中心流场湿式除尘器的试验研究

中心流场湿式除尘器通过在筒体内设置导流百叶窗来减轻内涡旋 ,使除尘器的压力损失大大降低 ,同时在筒体上设两根进水管 ,采用湿式除尘 ,又提高了除尘器的除尘效率。本文介绍了该除尘器的结构特点、工作原理、试验台系统的设计以及主要性能的测试结果     

GJX型高炉均压放散消声器的研制

针对高炉均压放散噪声产生的机理及特点和声学特性，对消声器的设计原则及其合理结构进行了探讨和研究，较好地解决了消声器排尘与清灰之间的关系，为类似的消声器设计提供可借鉴的经验     

膜压法在自然水体研究中的应用

膜压法在自然水体中的应用较为广泛。文章综述了膜压及膜面积可作为自然水体中有机物含量的表征，也可作为水体受污染程度大小的一种判据。在研究表面膜的表面物理性质与化学组分之间联系的过程中，发现表面膜中有能够主宰表面膜性质的标准物质存在。由于这些标准物质主导了表面膜的表面物理性质，因此。寻找这些标准物质，并将它们的表面物理性质特征化，这也是今后工作中研究的方向。     

埋弧自动焊技术在阀门生产中的应用

针对高温高压电站阀门体 座连接焊的“深孔环缝”特点 ,采用埋弧自动焊接方法进行了材料选择和焊接工艺评定实验 ,选择了合适的焊材及工艺并成功地应用于生产。