风电叶片表面保护涂料规模化制备技术研究项口进入“863计划”

科技部863计划新材料领域办公室日前公布了国家高技术研究发展计划（863计划）新材料技术领域“MW级风力发电机组风轮叶片原材料国产化”重点项目申请指南，其中“高性能多用途叶片保护涂料的研发及规模化生产技术研究”被列为“叶片辅料原材料国产化的制备及应用技术研究”课题的一部分。     

行业快讯

风电叶片表面保护涂料规模化制备技术研究项目进入“863” 科技部863计划新材料领域办公室公布了国家高技术研究发展计划（863计划）新材料技术领域“川级风力发电机组风轮叶片原材料国产化”重点项目申请指南，其中“高性能多用途叶片保护涂料的研发及规模化生产技术研究”被列为“叶片辅料原材料国产化的制备及应用技术研究”课题的一部分。风轮叶片是风力发电机组的关键核心部件之一，     

高扬程多级屏蔽泵在苯加氢生产系统中的应用

针对进口高速离心泵在苯加氢生产系统的苯移送过程中经常出现的泄漏和耐压低的实际问题,采用多级屏蔽泵双端加装串列叶片的结构设计,将国产低扬程多级屏蔽泵单端多级叶片改为两端对称多级叶片设置,满足了泵的高温、高压和高扬程的物料输送要求;在泵壳外增加整体高压护套,解决了各级叶片间静密封点的泄漏和耐压问题,使泵的无泄漏高扬程稳定运行周期大幅度提高,实现了进口装备的国产化改造,取得了显著的社会效益和经济效益。     

风电叶片用碳纤维拉挤板材国产化树脂性能的研究

随着风电叶片长度的增加,对增强材料的刚度和强度等性能提出了新的要求,使用碳纤维增强已经成为一种发展趋势。选取了国产化的拉挤树脂,对树脂黏度、凝胶时间以及浇筑体性能进行了研究。研究发现:国产化的拉挤树脂具有良好的流动性和浸润性,树脂凝胶时间较长,固化时间较短,非常适于拉挤工艺对树脂的要求;拉挤树脂固化浇筑体的拉伸和弯曲性能均满足拉挤风电复合材料的性能要求。     

风电叶片用大丝束碳纤维拉挤板的应用现状与挑战

综述了风电叶片用大丝束碳纤维拉挤板的应用现状和挑战。风电叶片用碳纤维拉挤板以连续大丝束碳纤维和高性能环氧树脂经热固化拉挤成型工艺连续生产而成,主要用作海上风电叶片的主梁;当前风电叶片用碳纤维拉挤板面临提高性能(包括压缩性能、层间性能、拼接性能)和降低成本的挑战;碳/玻混拉挤板作为一种低成本拉挤板,可为叶片设计、减重、降本提供更多可能;预计随着海上风电的发展及大丝束碳纤维国产化进程加速,大丝束碳纤维在风电领域的应用会进一步增长。     

苯菲尔蒸汽压缩机技改小结

在分析认为苯菲尔蒸汽压缩机叶轮损坏原因是汽蚀和水击以及介质中含有盐混合物对叶片产生冲蚀所致的基础上，采取了相应改造措施，即对转子及蜗壳等进行了改造。改造后，压缩机运行正常，不仅保证了装置的安全生产，而且表明此类型压缩机完全可以进行国产化改造。     

对海洋石油装备国产化的思考

装备国产化是一件利国利民的事,具有十分重要的战略意义,实现海洋工程重大技术装备国产化更是一项长期的、艰巨的任务。本文总结了中海油工程2009-2013年度装备现状,详细分析了2009-2013年度国产化实际情况、国产化的益处、国产化所关注的问题所在;从思想上对国产化在中海油系统中存在的问题提出了意见。根据海油实际情况,提出了五大措施来推进装备国产化。     

消化吸收引进技术 完善化肥工业国产化

本文回顾了我国化肥工业国产化发展过程，论述了实现国产化的条件，并对国产化项目提出了几点建议。     

使用国产化设备的体会

文章分析了用国产化设备代替进口设备的可能性；简要介绍了贵州轮胎厂使用国产化设备的具体做法；最后总结了该厂使用国产化设备的体会。     

使用国产化设备的体会

文章分析了用国产化设备代替进口设备的可能性；简要介绍了贵州轮胎厂使用国产化设备的具体做法；最后总结了该厂使用国产化设备的体会。     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

气化给煤系统故障分析

气化给煤装置自投运以来,出现了气化煤仓堵煤、称重给煤机输送皮带因跑偏而损伤以及清扫装置故障频繁等问题,多次造成气化系统减负荷运行。通过对出现的各种问题进行分析,找到了产生这些问题的原因,并有针对性地采用配煤和改进清扫链等措施,使出现的问题得到了极大的改善。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

Determination of the extent of oxidation of fats

Summary The amount of secondary oxidation products in refined and unrefined fats has been determined by reaction with benzidine acetate in iso-octane absolute alcohol solution, and measurement of the absorption at 350 mμ of the yellow color has been made. An “aldehyde value” has been calculated from this absorption intensity, using cinnamaldehyde as a reference substance. Determination of the aldehyde value and peroxide number of oils before and during refining has given information on the effect of the different refining processes on the state of oxidation of the oils. The effect of hardening on the content of oxidation products of an oil has been investigated. The effect of the amount of oxidation products in the unrefined material on the flavor stability of the refined material and of the margarine made from it has also been studied.     

A Review of Contemporary Views of Theories of Adhesion

The once distinct and independent theories of adhesion have been losing their isolation and converging. Ideas of the effects of surface roughness, once dismissed as irrelevant except in the case of textiles, have been revised; albeit on a smaller scale as details of surfaces have been revealed by sophisticated techniques. Electrostatic interactions across an interface have been more deeply explored and their significance recognised and expounded. Diffusion of groupings and chain segments within a polymer have been related to the possibilities of interaction with a variety of surfaces. Perhaps most important, theories of adsorption have been extended in depth. The precise nature of the molecular interactions have been recognised and quantified. In doing this the contribution of diffusion and elastoplastic phenomena have been integrated. These developments are collated and analysed to present the present understanding of the concepts.     

Stability of granules of solid solutions of poly-pehnyleneterephthalamide

Conclusions Studies of starting solutions of PPTA in sulfuric acid and of granules obtained under pressrue at low temperature, and of granules stored in a hermetic package, have been carried out by the methods of differential thermal analysis, turbidity spectrum and viscometry.On granulation of a solidified PPTA solution, short-term storage of the granules in a hermetic package, or short contanct of the granulated mass with air, no appreciable change in melting point or of the intrinsic viscosity of the system takes place.Long storage of a granulated solution, even in hermetic packages, can lead to a considerable decrease in the melting point of the crystal solvates, caused by an increase in defectiveness of crystal structure under the effect of moisture.Translated from Khimicheskie Volokna, No. 3, pp. 25–26, May–June, 1986.     

平板硫化机横梁受热变形及热板中高度的应用

介绍了平板硫化机热板中高度在硫化排气过程中的作用及其实现途径和评价方法;提出了设置热板中高度时应遵守的＂刚性横梁、柔性热板＂概念和＂最短路径、最小排气阻力＂原则;探讨了横梁热变形对热板中高度的影响。结果表明,参考横梁热变形设置的热板中高度有助于解决平板硫化机在复杂状态下硫化制品时的表面排气问题。     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

邢钢套筒窑换热器内漏生产实践

介绍了套筒窑换热器的工作原理、作用及邢钢套筒窑换热器内漏的判断依据,对套筒窑换热器内漏的原因进行了简要的分析,对内漏前后的主要参数进行了对比,同时结合实际生产情况,制定了行之有效的控制措施,收到了良好的效果。