砂基多孔隙透水材料探析

介绍了砂基多孔隙透水材料的发展历程,总结了砂基多孔隙透水材料的研究及应用现状。重点分析了砂基多孔隙透水材料的制备工艺,探究了改善其性能的方法。     

CDM-系列开窗导流式催化精馏模块在C4/C5醚化等反应中的工业应用

CDM-系列开窗导流式催化精馏模块具有优异的"催化反应"和"组分分离"双重功能,综合性能优于催化蒸馏组件CDP,是其升级换代产品。可应用于甲基叔丁基醚、轻汽油醚化、异丁烯叠合和叔丁醇脱水等工艺中,主要介绍CDM-系列开窗导流式催化精馏模块产品特点及在工业装置中的应用情况。     

论中国建筑陶瓷的“微增长”背景及其影响因素

以前建筑陶瓷产能都以年均12%以上的速度快速增长,而到2012年,中国建筑陶瓷产量以3.35%的速度增长。由此宣告一个微增长时代的到来。本文通过分析其影响中国建筑陶瓷的总量的因素,及其带动的产业链,分析其中特征指出未来的发展方向,具有重要意义。     

几种多孔陶瓷孔隙结构及孔径控制的方法

本文列举了几种常用的多孔陶瓷的制备方法,并初步探寻控制孔径的途径。     

规整填料内单相流的LDV实验研究

To date, many models have been developed to calculate the flow field in the structured packing by the computational fluid dynamics （CFD） technique, but little experimental work has been carried out to serve the vali-dation of flow simulation. In this work, the velocity profiles of single-phase flow in structured packing are measured at the Reynolds numbers of 20.0, 55.7 and 520.1, using the laser Doppler velocimetry （LDV）. The time-averaged and instantaneous velocities of three components are obtained simultaneously. The CFD simulation is also carried out to numerically predict the velocity distribution within the structured packing. Comparison shows that the flow pattern, velocity distribution and turbulent kinetic energy （for turbulent flow） on the horizontal plane predicted by CFD simulation are in good agreement with the LDV measured data. The values of the x-and z-velocity components are quantitatively well predicted over the plane in the center of the packing, but the predicted y-component is sig-nificantly smaller than the experimental data. It can be concluded that experimental measurement is important for further improvement of CFD model.     

主桨叶大梁疲劳断裂断口定量分析研究

主桨叶大梁服役800 h多后发生断裂，当大梁裂纹穿透壁厚时，压力传感器无压差告警，引起后续大梁的持续扩展直至断裂。通过对大梁断口开展宏微观观察和断口定量分析，结合外场飞机载荷谱分析，给出大梁在不同阶段的扩展速率，并通过模拟桨叶裂纹扩展进行验证，获得主桨叶大梁的扩展寿命约为40个起落，萌生寿命为2097个起落，反推效果较好。通过断口定量给出的结果，弥补外场监测不到位的不足，为排故提供方向，为主桨叶大梁寿命评估和设制定检周期服务，可为大梁损伤容限进行评价，当裂纹穿透壁厚压力传感器告警后的损伤容限周期至少为10个起落。     

“以无厚入有间”——如何准确、有效地清理库存

天津石化是国有特大型石油化工联合企业，经过若干轮的改革与重组，其物资供应管理体制和模式已经逐步达到了其总部提出的“统一管理、统一采购、统一储备、统一结算”体制。但同时，多年遗留下来的库存也成了一本很难说清楚的糊涂账。     

滑动阀片笼罩式喷射浮阀塔板的性能

报道一种新型浮阀——滑动阀片笼罩式喷射浮阀。应用空气-水系统,在600mm×250mm矩形塔内,对阀片厚度3mm的滑动阀片笼罩式喷射浮阀塔板的流体力学进行了试验研究,给出了冷模试验结果、与通常使用的F1浮阀塔板性能的对比和塔板流体力学性能的计算关联式。试验结果表明滑动阀片笼罩式喷射浮阀塔板的各项流体力学性能均优于F1型浮阀塔板。操作弹性大,是特别适合低气速下的一种塔板。     

浓度极稀物中回收微量重组分的精馏操作策略-准间歇精馏

A new operation policy-quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.     

微晶石工艺技术的探讨及其产品缺陷的解决方法

本文主要讲述了微晶石的发展历程、生产工艺及其创新,以及产品缺陷的解决方法。实践证明:微晶石产品存在的主要缺陷为硬度不够、气孔、变形等,如何解决这些缺陷问题,是微晶石生产的关键所在。