旋转薄膜蒸发器的合理应用

简单介绍了太原化学工业集团有限公司蒸发生产45%离子膜碱的工艺流程及采用的主要设备旋转式薄膜蒸发器,在工艺、设备、生产管理等方面对该蒸发装置提出合理建议,并指出了存在的问题及注意事项.     

用于浓碱液蒸发的旋转薄膜蒸发器

介绍了一种用于将烧碱溶液从ＮａＯＨ含量３０％（Ｗｔ）进一步浓缩蒸发的新型高效蒸发器。这种蒸发器具有很高的传热系数和蒸发强度，只需使用低压加热蒸汽（１３０℃左右）供热，大大减缓了碱液对设备的腐蚀，从而可用普通奥氏体不锈钢代替价值昂贵的镍材来制造浓效蒸发器。通过工厂使用实例的介绍和分析，说明这种蒸发器不但总传热系数很高，而且其热阻主要不是液膜或盐垢，而是来自导热系数较低的不锈钢材料。     

薄膜蒸发器在烧碱生产中的应用

介绍了采用薄膜蒸发器将３０％液碱浓缩成５０％液碱生产装置运行情况。     

导热油炉加热旋转薄膜蒸发器在硫化碱中的应用

导热油炉加热旋转薄膜蒸发器是一种新型的硫化碱生产的关键设备,它由导热油炉与旋转薄膜蒸发器两部分组成。它的使用可使硫化碱蒸发工段实现连续化生产,且可减轻劳动强度,改善劳动条件,提高生产效率,稳定产品质量,节约能源,降低消耗,又不污染环境。     

18m^2高效旋转薄膜蒸发器的研制

随着２ｍ＾２、４ｍ＾、６ｍ＾２、８ｍ＾２薄膜蒸发器在医药、食品、油脂、化工及石化等行业的应用日趋成熟，现已开发了换热面积达１８ｍ＾２的高效旋转膜蒸发器。本文阐述了该薄膜蒸发器的部分计算与分析。     

导热油炉加热旋转薄膜蒸发器在硫化碱蒸发中的应用

导热油炉加热旋转薄膜蒸发器是一种新型的硫化碱生产的关键设备，它由导热油炉与旋转薄膜蒸发器两部分组成。它的使用可使硫化碱蒸发工段实现连续化生产，且可减轻劳动强度，改善劳动条件，提高生产效率，稳定产品质量，节约能源，降低消耗，又不污染环境。     

高效旋转薄膜蒸发器用作热敏性物料反应器初探

１前言有机化学均相液－液反应通常是在釜式反应器中进行,如果反应物或产物为热敏性物料,且要求反应温度高于其耐热极限值,由于釜式反应器传热效率差,反应时间长,必然造成反应物或产物一定程度的热分解,降低了反应的收率。我们在新产品的研究开发过程中遇到如下的有...     

薄膜蒸发器的设计

综述了机械搅拌式薄膜蒸发器的基本结构、原理,并以1 m2机械搅拌式薄膜蒸发器为例论述了薄膜蒸发器的结构设计过程。机械搅拌式薄膜蒸发器是利用旋转的刮板将料液分散成均匀的薄膜,以进行物料浓缩的一种新型高效蒸发设备。     

LK1200型薄膜蒸发器转子修复

通过设备故障检修的实例，探讨了以海氏合金Ｃ４为主体材料的薄膜蒸发器转子修复的技术问题。     

竖管降膜蒸发器多层筛板液体分布装置的研究

本文介绍了用于竖管降膜蒸发器的多层筛板液体分布器。通过对多层筛板分布器的测定，找出了降流密度与分布不均匀度之间的关系以及粘度对分布不均匀度的影响，提出了在冷模状态下最小降流密度的设计参考值。     

水平管降膜蒸发传热的实验研究进展

介绍了水平管降膜蒸发的原理、特点及管束间液膜的流动形态,总结水平管降膜蒸发在实验条件不同时对传热性能影响的研究情况,并提出了进一步研究的方向。     

The FRL-FRH phase transition in PZT 95/5 thin film

The PZT 95/5 thin film was prepared on Pt/Ti/ SiO₂Si substrate by sol-gel method. The behavior of F_RL-F_RH phase transition was investigated in the thin film. The change of the remanent spontaneous polarization during the F_RL-F_RH phase transition is 0.6 μc/cm².     

薄膜蒸发器结构改造

介绍了4m^2和6m^2旋转式薄蒸发器的结构及工作流程,针对实际运行中出现的蒸发器整体振动幅度大、内简壁鼓包的故障和缺陷,提出了几种结构改造方案,不仅提高了蒸发效率,而且延长了蒸发器的使用寿命。     

薄膜蒸发器筒节整体夹套封口环应力分析及其改进设计

根据对流传热数值模拟结果 ,建立了薄膜蒸发器筒节整体夹套结构的有限元计算模型 ,利用有限单元法进行了结构的应力分析和强度计算。计算结果为 :当不考虑温度载荷时 ,结构是安全的 ;当考虑温度载荷时 ,结构肯定是欠安全的。对此又进行了改进结构设计和相应的强度计算 ,并经受了实践的考验     

Dynamic behavior of thin film sea water evaporators

This paper presents the results of analytic and experimental research on the dynamic and part-load behavior of horizontal aluminium-tube multieffect evaporators (ATME) of Israel Desalination Engineering (IDE) Ltd's make. The analytic investigation comprises the development of a computer program which describes the slow transients of the response of the evaporator to step changes in heating steam temperature. By reaching steady state at different steam temperatures it also calculates part-load behavior.The experiments were conducted on a 150 m³/day pilot plant at the IDE Tel-Baruch Test Station near Tel Aviv; they comprised startup tests and performance tests with variable heating steam temperatures, cooling water flow and vacuum system capacities. Comparison of the analytic and experimental results shows fair agreement.     

Organic thin film transistors: Materials,processes and devices

For the past ten years, organic materials have been extensively investigated as an electronic material for thin film transistor (TFT) devices. Organic materials offer strong promise in terms of properties, processing and cost effectiveness and they can be used in flat panel displays, imagers, smart cards, inventory tags and large area electronic applications. In this review, we summarize the current status of the organic thin film transistors including substrate materials, electrodes, semiconducting and dielectric layers; organic thin film preparation methods; morphological studies for organic thin films; electrical characterization of gate dielectric layers and semiconducting active layers; and characterization of the OTFTs. Future prospects and investigations required to improve the OTFT performance are also given. This paper is dedicated to Professor Hyun-Ku Rhee on the occasion of his retirement from Seoul National University.     

The effects of Cu-doping in V2O5 thin film cathode for microbattery

Copper-doped vanadium oxide (Cu_xV₂O₅) thin film cathode materials for a thin film microbattery have been prepared by DC reactive magnetron co-sputtering with O₂/Ar ratio of 10/90 and compared with pure V₂O₅ thin film. The film structures have been characterized by x-ray diffraction analysis, transmission electron microscopy, Auger electron spectroscopy and X-ray photoelectron spectroscopy. X-ray diffraction and TEM studies show that the Cu_xV₂O₅ film was amorphous and phenomenal behavior of copper present in thin film with substrate has been explained by thermodynamical model. Copper doping helps to increase the thickness of the film more than 1 micrometer resulting increase of total capacity. Cycling behavior of the Cu_xV₂O₅/Lipon/Li configuration cell system was beyond 500 cycles with average capacity of 50 μAh/cm²-μm, which is higher than the pure V₂O₅ thin film system. Presented at the Int’l Symp. on Chem. Eng. (Cheju, Feb. 8-10, 2001), dedicated to Prof. H. S. Chun on the occasion of his retirement from Korea University.     

伞板形液体布膜装置结构及布膜性能研究

对适用于垂直管降膜蒸发器的伞板形液体布膜装置的结构进行了介绍,给出了伞板形液体布膜装置与换热管内壁之间的环隙的计算公式。并对其成膜性能进行了实验研究,得到了液体雷诺数、液体布膜装置的结构与液体成膜不均匀度系数之间的关系。