共查询到20条相似文献,搜索用时 109 毫秒
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侯良立 《化学工业与工程技术》2007,(Z1)
再生器是催化重整装置中催化剂再生工艺流程的关键设备,约翰逊网是再生器的重要内件,它可以使催化剂连续烧焦和再生。本文介绍了约翰逊网等内件的安装方法,以及为保证其安装尺寸要求,在制造过程中对设备壳体合理拆分、确定内件支撑圈组焊加工顺序和内部构件加工制造工艺以及允差调整和控制过程。 相似文献
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为了降低离子交换树脂再生时的酸碱耗,介绍了某电厂化学水处理一级除盐设备再生时酸碱用量调整试验的基本过程。根据原水水质和水处理设备及原始水处理工艺条件等情况,通过降低再生液浓度,延长再生时间,控制运行流量等,调整试验、确定最优酸碱耗,节约了酸碱用量、减少了自用水率,达到了降低生产成本的目的。 相似文献
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The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion. 相似文献
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A. S. Stankevich R. R. Gilyazetdinov N. K. Popova D. A. Koshkarov 《Coke and Chemistry》2008,51(9):357-363
A model is developed for predicting the postreactive strength CSR and reactivity CRI of coke. The model adequately reflects the dependence of these characteristics on the chemical and petrographic parameters of the coal batch, taking account of the batch preparation and coking period, as well as the slaking method. 相似文献
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从离子膜法烧碱整流装置的保护原理出发,通过对某工厂在2005年整流装置跳闸原因的统计和技术分析,发现电网波动和雷击是整流装置跳闸的两个重要原因,并提出了采取修改整定值、增加防晃电交流接触器以及在低压交流侧增加三级防雷措施的整改对策。整改后,整流装置跳闸次数明显减少。 相似文献
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我近两年花了很多时间喝茶,我想梳理出两个对象,一个是中国茶,一个是中国漆。茶和漆在某种层面上是完全一样的,这是我的心得。从这两个对象延伸到美术教育范畴,那就是关于“中国物质”的唤醒,这将是中国美术学院中国漆艺术专业要作的重要工作甚至是历史使命。“中国物质”这个话题比较严重,也比较复杂,我为什么会讲到那么复杂的一个话题,或者看上去那么崇高的话题,是因为我们现在面临一个很重要的国际化背景,就是中国制造,或者中国设计,中国设计和中国制造没有对称关系,制造和设计是对立的关系,或者二元的关系,所以我想这问题比较麻烦。我们现在中国制造的潜台词就是垃圾货,或者便宜货不安全的,所以我会在这个话题上跟漆引发话题。假设中国制造确实存在负面价值的话,那什么东西可能是正面的呢?假设有一种形态可以跟中国制造来匹配的话,我想有两个东西可以和它对接,那就是“中国文化”和“中国物质”,可能有很多的东西中国人已经遗忘了,而这些东西在当代生活中可能具有很强的应用价值,我指的是产品及其使用方法,它可能不具备中国制造的负面,比如说低级、廉价、不安全,中国有这样一大批的东西具有价值,其中包括中国漆、中国茶,这是物质。假设我们从物质出发,我们会进一步引... 相似文献
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Thermal Decomposition of the Oxynitride of Germanium and the Heat Capacity of the Oxynitrides of Silicon and Germanium 总被引:1,自引:0,他引:1
Using the mass spectrometry-effusion cell technique, Ge2 N2 O has been found to decompose under equilibrium conditions according to Between 850 and 1000 K, the free energy change for this reaction is given by The heat capacities of Gez N2 O and its silicon homolog between 296 and 738 K have been determined using differential scanning calorimetry. From these results it has been found that 相似文献
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讨论了塑料的生物降解性,包括降解因素,微生物分解塑料的各种形式、降解机理等。介绍了目前国内外常用的检测塑料生物降解的方法。 相似文献