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在实际生产中我们经常遇到一些电动机停机,一段时间后再开机时发现电动机绕组绝缘阻值降,低必须重新干燥处理后才能投入使用对小型,电动机我们可以将其放入烘箱中进行干燥处理但对,大中型电动机超过200kW的电动机因其体积较(),大拆卸不便一般厂矿企业也没有那么大的烘箱,可烘烤 相似文献
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针对电镀烘箱主要采用燃油加热的现状,通过理论分析计算、4种热介质优缺点比较、中试试验对比等,证明水蒸汽替代燃油加热在电镀烘箱上的应用符合"技术先进可靠,经济合理适用,运行安全稳定"的原则。通过52台电镀烘箱的应用实践验证该技术不仅解决了使用燃油产生的火灾安全隐患和环境污染,有效降低电镀企业生产成本,还为供热企业开辟新的供热市场,真正从源头上实现节能减排,具有实际推广应用价值。 相似文献
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一、概论电烘箱是实验分析室及有关生产部门不可缺少的电加热仪器。我们应用远红外技术,将实验分析室的常用普通烘箱进行了改造,经几年来使用实践证明,具有如下优点:1.节电效果一般可达30%~40%左右;2.结构简单,维修方便,投资少;3.加快了水分干燥及烘烤速度;4.延长了烘箱的使用寿命。 相似文献
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玻璃纤维在溶液槽中经偶联剂处理后,通过烘箱除去水分,在复合模具中与熔融的高密度聚乙烯复合,在一定压力条件下制成带状,即可得到玻璃纤维增强复合带。在不同工艺条件下制备玻璃纤维增强复合带,并对其进行力学性能测试,寻求最佳工艺条件。结果表明,经偶联剂处理的玻璃纤维在烘箱温度为170℃、走丝速度为6m/min、成型压力为500N、张紧度为7N的条件下制备的复合带性能最佳。 相似文献
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《高科技纤维与应用》2011,36(5)
本发明涉及一种环保节能的多级组合式高性能纤维超倍热牵伸装置。其特征在于:在一个封闭保温箱体内的设置有相互独立的预牵烘箱和若干个牵伸热烘箱,在各个相互独立的预牵烘箱和牵伸热烘箱的上部均设有排风装置,在预热烘箱内设有预牵机,在牵伸热风烘箱内设有牵伸机。 相似文献
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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。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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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 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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利用组件技术开发化工原理实验课件,给出了系统层、组件库层和应用层的架构划分。重点讨论了组件库的设计,给出了流体阻力这一典型实验的实现描述。实践证实,基于组件技术可以提高仿真实验的开发效率。 相似文献