节能调度环境下风、火电联合运行优化模型及其应用

为解决传统的风、火电联合运行模型不能克服风电并网导致机组启停成本过高的问题,以节能发电调度为背景,以火电机组发电燃煤成本、启停成本最小化为目标,构建了风、火电联合运行优化模型。算例分析结果表明,该模型能有效地吸纳弃风,提高了风电并网量、降低了高耗能燃煤机组的调用,具有显著的环境和经济效益。     

Preparation of Au/TiO2 catalysts from Au(I)–thiosulfate complex and study of their photocatalytic activity for the degradation of methyl orange

Gold loaded on TiO₂ (Au/TiO₂) catalysts were prepared using Au(I)–thiosulfate complex (Au(S₂O₃)₂³⁻) as the gold precursor for the first time. The samples were characterized by UV–vis diffuse reflectance spectra, X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic absorption flame emission spectroscopy (AAS), and X-ray photoelectron spectroscopy (XPS) methods. Using Au(S₂O₃)₂³⁻ as gold precursor, ultra-fine gold nanoparticles with a highly disperse state can be successfully formed on the surface of TiO₂. The diameter of Au nanoparticles increases from 1.8 to 3.0 nm with increasing the nominal Au loading from 1% to 8%. The photocatalytic activity of Au/TiO₂ catalysts was evaluated from the analysis of the photodegradation of methyl orange (MO). With the similar Au loading, the catalysts prepared with Au(S₂O₃)₂³⁻ precursor exhibit higher photocatalytic activity for methyl orange degradation when compared with the Au/TiO₂ catalysts prepared with the methods of deposition–precipitation (DP) and impregnation (IMP). The preparation method has decisive influences on the morphology, size and number of Au nanoparticles loaded on the surface of TiO₂ and further affects the photocatalytic activity of the obtained catalysts.     

显示屏用薄玻璃的化学钢化及性能分析

薄玻璃广泛应用于各类显示器件中。其特点是容易进行化学钢化,以提高显示器玻璃的使用寿命。采用钢化玻璃表面应力仪、维氏硬度计等研究化学钢化玻璃性能,并对制备参数进行优化,达到使用目的。     

Crystallization morphology and crystallization kinetics of poly(lactic acid): effect of <Emphasis Type="Italic">N</Emphasis>-Aminophthalimide as nucleating agent

The effect of N-Aminophthalimide compound (NA-S) as nucleating agent on crystallization behavior and morphology of poly(lactic acid) was studied. With polarized optical microscope (POM), the unique phenomena of nucleation and epitaxial crystallization of PLA/NA-S system were observed. Dynamic morphology of crystallization was also studied by POM to investigate the relationship between growth behavior of PLA and nucleating agent. Isothermal and non-isothermal crystallization behavior of PLA were studied by differential scan calorimeter (DSC). When nucleating agent was added, a new peak appeared in wide angle X-ray diffraction (WAXD) compared with pure PLA, indicating the nucleating effect of NA-S on crystallization of PLA. All the results indicate that the nucleating agent of NA-S shows obvious nucleating effect on isothermal crystallization above 120 °C and in non-isothermal crystallization after it is added in PLA, that is, the induction crystallization time is reduced, the crystallization rate and nucleation density of PLA are increased.     

有机硅改性丙烯酸树脂的合成工艺

采用乙烯基三乙氧基硅烷和八甲基环四硅氧烷为改性剂与丙烯酸单体乳液聚合,制得聚合工艺稳定、耐水性能和耐擦洗性能优异的树脂,该树脂能室温交联固化,适用于高档外墙涂料和防水要求较高的地方。并讨论了有机硅单体类型、用量、反应温度和调节剂等因素与树脂性能的关系。     

SPUA—202喷涂聚脲铺地材料的研制

以液化ＭＤＩ、ＭＤＩ－５０、聚醚多元醇、端氨基聚醚、胺类扩链剂为要原料,研制了一种用于防滑铺地材料的慢速固化型喷涂聚脲弹性体ＳＰＵＡ－２０２。讨论了多异氰酸酯类型、硬段含量、扩链剂类型和端氨基聚醚类型对弹性体性能及反应速度的影响。同时介绍了ＳＰＵＡ－２０２喷涂聚脲铺地材料的性能及应用领域。     

聚乙烯等离子体接枝甲基丙烯酸的阻燃性能研究

以聚乙烯为基础,尝试通过等离子体接枝方法接枝甲基丙烯酸以达到聚合物阻燃的目的.接枝后样品的点燃时间明显延长、极限氧指数明显提高、成炭量明显增加,说明接枝后的侧基(-COOH、-COONa+和-COO-K+)在热降解过程中不仅自身参与成炭,而且强有力地促进了基体聚合物的成炭过程.     

盐蚀-动水条件下沥青混合料性能损伤评价

盐蚀环境对沥青混合料耐久性劣化作用具有普遍性和直接性.为探究盐分-水-温度-荷载共同作用下沥青混合料宏观力学性能损伤演化规律,采用自行研制的沥青混合料动水-盐蚀冲刷试验仪,合理设置试验参数,以25℃劈裂强度指标评价盐蚀-动水条件下沥青混合料力学性能损伤程度,利用灰熵分析与t检验研究冲刷温度、冲刷次数、盐浓度对沥青混合料...     

两辊矫直机的全数字控制系统

介绍北兴特殊钢有限公司两辊矫直机的全数字控制系统,对矫直机的构成和控制方式进行了重点说明,该系统将西门子技术应用在矫直机上,使系统运行稳定可靠.     

润滑油糠醛抽提塔理论板数的实验标定

采用多级静态萃取模拟的方法对大连石化公司润滑油糠醛精制抽提塔的理论板数进行标定。结果表明,该抽提塔的理论板数为2—3块,在操作条件不变的情况下,现有糠醛抽提塔至少要4块理论板才能使基础油的酸值符合要求。采用具有4块理论板的中试装置对标定结果进行了实验验证,在与工业装置相当的操作条件下,精制油收率为76．0％,黏度指数为106,酸值为0．0174mg（KOH）／g,产品质量能够满足HVl400SN润滑油基础油质量要求。