蒸馏与减粘热联合装置的设备腐蚀及防护

介绍了锦西石化分公司南蒸馏与减粘热联合装置炼制辽河高酸值原油及带炼高硫进口油在 2 0 0～40 0℃范围内对设备、管线和阀门的腐蚀特点、腐蚀机理以及针对高温环烷酸腐蚀所采取的防护措施。通过试验和理论分析 ,提出了应用新材料和新工艺解决减粘后高温渣油系统的腐蚀及低温露点腐蚀的建议     

Forecasting Capillary Characteristics for Aluminum Nitride Ceramic ― Liquid Metal Systems

A test has been devised that allows one to determine the work of adhesion and wettability in a system composed of aluminum nitride ceramics with a liquid metal without the need for experimental examination. A correlation is examined between the work of adhesion on the one hand and that criteria or others on the other that have been proposed by various researchers. Forecasts are made for the work of adhesion and wetting angle for a series of metals that have not been examined previously. An experimental check has been made on the forecast adhesion activity for some elements.     

西门子工业控制网络在棒材连轧生产线的应用

本文通过对包钢棒材连轧线的工业控制网络的由分体到整体的介绍,将西门子公司的三级控制网络(Profibus-DP网络、MPI网络、工业以太网)思想做了一个全面的说明.通过与现场实际相结合,使人们对这一概念有了更加清晰的认识.文章最后还结合作者的一些体会作了总结.     

Oscillating Cup Viscosity Measurements of Aluminum Alloys: A201, A319 and A356

An oscillating cup viscometer was developed to measure the absolute viscosities of molten metals. Previous experiments established the capability of the apparatus to characterize the viscosities of molten nickel-based superalloys. However, modifications to the instrument and its theoretical analysis were required for reliable measurements on molten aluminum alloys, presumably due to their lower densities and lower viscosities. The theoretical literature for the fluid flow inside an oscillating cup is reviewed, and a working equation without any correction factor is developed for the improved viscometer. Some design parameters of the viscometer that directly affect the accuracy of viscosity estimation by using the working equation are discussed. A special vertical furnace was adopted to uniformly heat a longer cylindrical sample (10 mm inner diameter and 120 mm length) with a temperature difference of less than 2°C over the sample length. The measuring procedure was also improved to get more accurate motion parameters. It is estimated that the working equation and improved instrument provide an uncertainty of less than 4%. In addition, applications and experimental data are presented for pure aluminum and three aluminum alloys: A201, A319, and A356.     

Development of High Thermal Conductivity Aluminum Nitride Ceramic

AIN ceramics with densities varying from 3.18 to 3.30 g/cm³ and room-temperature thermal conductivities varying from 88 to 193 W/m K were produced. Different sintering conditions, packing powders, AIN powder sources, carbon additive, and sintering times were evaluated, and the key processing parameters which cause the differences in density and thermal conductivity were identified. SEM, TEM, and EDS were used to characterize the correlation between thermal conductivity, microstructure, and processing parameters. The important parameters which control the thermal conductivity of AIN ceramics are discussed.     

C5/C6异构化催化剂的首次工业应用

采用中石化金陵分公司研究院研制的CI-50(Pd/丝光沸石)作C5/C6烷烃异构化催化剂.详细介绍了该催化剂的工业放大试验装置的工艺流程、首次开工过程中技术问题及处理方法.     

Crack growth in aluminium alloy sheet material under flight-simulation loading

Crack propagation tests were carried out on 2024-T3 sheet specimens to study the effects of omitting low-amplitude cycles from the gust-dominated TWIST load sequence (MiniTWIST) and the removal of small load ranges from the manoeuvre-dominated FALSTAFF load sequence (short FALSTAFF). In other tests high-amplitude loads of TWIST and MiniTWIST were truncated at different levels. The results are compared with data from similar test programmes, including crack initiation. Attention is paid to unstationary crack growth retardation and a transient retardation during initial crack growth started by an artificial crack.     

静态水热脱铝处理对HZSM-5分子筛的结构、酸性和催化性能的影响

开发了一种静态水热脱铝的方法。HZSM-5经此法处理后,正戊烷的裂解活性增加,脱氢和芳构化性能加强。可用改变处理温度的方法来控制脱铝的程度。用XRD和吡啶吸附红外技术进行了研究。HZSM-5分子筛催化剂性能的变化用非骨架铝产生的强L酸中心来解释。     

换热器防腐蚀方法介绍

文章对换热器的不同保护方法进行了介绍 ,重点讨论了渗铝、渗锌两种方法。在室温～ 80℃自来水和 3.5 %NaCl水溶液中 ,与碳钢基体相比 ,渗铝层的电位发生了反转 ,因而在针孔部位会形成大阴极小阳极的局面 ,易发生点蚀 ;而在相同条件下渗锌层不出现上述点蚀现象 ,更适宜在换热器的应用     

废塑料裂化生产汽柴油工业化装置研究

报道了废塑料炼油工艺中连续法、间歇法、半连续法等各种方法的特点 ;重点对各工业化流程中存在的问题和解决的方法进行了讨论 ,并提出了一些合理化的建议。