制备轻油蒸汽转化制氢镍催化剂新的共浸法

用一种新的共浸法制备一批轻油蒸汽转化催化剂样品。运用TG、DTG、DSC和XRD进行的研究发现,与一般共浸法相比,这种着重提高组份间相互作用的新制法有利于提高镍催化剂的活性、抗积炭性、稳定性和金属镍的分散度,并发现用新法制备的催化剂样品,在水热初期约30小时的过程中,出现了镍晶粒先聚集再分散的新现象。     

曙—区超稠油间歇蒸汽吞吐技术探讨

针对曙-区超稠油井进入高周期后产量递减，成本上升的矛盾，提出用间歇吞吐技术改善高周期蒸汽吞吐效果，通过对吞吐机理和现场实际资料统计的分析。对这项技术实施的条件及效果进行了探讨。结果表明，该项技术在高周期井实施效果较好。具有较好的推广前景。     

联合循环机组汽封系统的设计改进

介绍了联合循环汽轮机原汽封系统存在的问题以及改进后汽封系统的工作原理和运行控制过程。     

220t/h高压蒸汽锅炉过热器的吊装技术

220t/h高温高压蒸汽锅炉过热器为大体积，大吨位，且锅炉工程与土建安装施工处于交叉作用状态，场地又狭窄，基于上述原因，提出了分部倒钩吊装方法，介绍了该方案的实施过程，对过热器的扳倒，倒钩，吊装的每道工序均进行了阐述，在不增加成本的前提下，安装，可靠，高效地完成吊装任务。     

CAE技术在汽轮机高温强度计算中的应用

为分析某百万千瓦超超临界汽轮机高压缸旋转部件在高温以及高离心力载荷下的强度状况,建立高压缸第一级动叶片的模型.根据蠕变试验数据,采用最小二乘法拟合幂蠕变方程中的各个参数,并详细介绍各参数的拟合、优化和验算过程;用CFD分析软件计算流体域内的对流传热系数并插值到有限元计算程序中,分析叶根倒角处危险区域的蠕变应力状况.数据验算结果表明,利用拟合数据计算得到的蠕变应力值与试验值比较接近,证明该方法可靠;CAE计算结果表明,叶根倒角处危险区域蠕变应力考核合格,并且有充足的安全裕量.     

Decay rate of critical fluctuations in steam and in dilute steam-NaCl mixtures

The decay rate of critical fluctuations in steam and in a steam-NaCl mixture has been investigated experimentally with the aid of photon correlation spectroscopy. For pure steam, the measurements have been performed along seven isochores [(¦– _c¦)/_c<0.09] as a function of the temperatureT for (T–T_t)<1 K. The results have been compared with the values predicted by the renormalization-group theory written as a modification of the classical mode coupling theory. The agreement between experiment and theory is satisfactory along the critical isochore, but larger deviations are noted for _c when approching the transition temperatureT _t. The decay rate of a 0.1% (molar) dilute mixture of NaCl in H₂O has been measured along some near-critical isochores as a function of temperature. Its behavior, which is very different from that observed for pure steam, is dicussed.Paper presented at the Tenth Symposium on Thermophysical Properties, June 20–23, 1988, Gaithersburg, Maryland, U.S.A.     

A refined evaluation of the gas-phase water-dimerization equilibrium constant within non-rigid BJH- and MCY-type potentials

The flexible BJH- and flexible or semiflexible MCY-type water-water potentials (4 potential modifications in each nonrigid family, i.e., altogether 12 potentials) are used for evaluation of the gas-phase water-dimerization equilibrium constants. The potential-energy term is adjusted for best reproduction of the available experimental equilibrium constants. An independent test using the experimental steam second-virial coefficient isotopic difference shows that the adjustment also improves the computational evaluation of the difference. A set of dimerization equilibrium constants is suggested over a wide temperature interval (based on the BJH/G, MCY-B, or MCYB potential modifications). The best reproduction of the experimental equilibrium constants (in conjunction with good performance for the second-virial isotopic difference) is produced by the BJH/G potential. The results are applicable to various problems such as the formation of water clusters in large-scale natural and artificial water jets (e.g., hydrogen-oxygen rocket motors, orbital capsule water dumps, water ejection from a comet nucleus) or in atmospheric chemistry.     

余热利用供热系统蒸汽负荷平衡调节方案选择

阐述了在余热利用区域的供热系统中 ,蒸汽负荷平衡调节的措施、特点及方案选择。通过工程方案选择的实例 ,指出调节好余热源设备生产出的蒸汽平衡 ,与余热利用同等重要。     

PTA装置中冷凝器壳体腐蚀原因分析及防护对策

对仪征化纤化工厂PTA装置中反应器第一冷凝器E-112 壳体腐蚀状况进行了分析.结果表明，高温高压冷凝液的冲刷是造成E-112壳体腐蚀穿孔的 主要原因，并提出相应防护对策.     

介质条件对核电用镍基合金传热管SCC的影响

综述了环境因素，包括温度、ＰＨ值、溶解氧、氯离子、氢、荷性碱含硫化合物以及铅等对压水堆核电站蒸汽发生器传热管用基合金材料（８００、６００、６９０合金）和腐蚀破裂（ＳＣＣ）敏感性的影响。