水泥厂自备发电站设计介绍

中东地区重油丰富,价格便宜,这些国家远离国家或区域电网建设的水泥厂以重油作燃料建自备电厂优势明显。以中东某3000t/d熟料生产线建设的自备电站为例,重点介绍了其柴油发电机选型及燃油品种的选择,以及主机性能和辅机设备(包括燃油、润滑及压缩空气,进气、排气等系统要求)的配套问题及经验总结。     

基于自供给模式的电动汽车换电站供需均衡运营策略

以换电模式为电动汽车(EV)提供能源补给是促进EV行业发展的重要保障。为了评估EV换电站的运营模式、提高EV换电站的运营效益,提出了一种基于自供给模式的EV换电站供需均衡运营策略。针对未来可行的统一化电池规格和换电站自供给模式,EV既可作为电池消费者,又可作为电池服务提供者,通过设计换电站的动态奖励机制,以吸引EV用户充当电池服务提供者辅助换电站提供换电服务,并基于带约束的马尔可夫决策框架对系统的随机优化问题进行建模。算例结果表明所提策略能使换电站自适应地选择给予电池服务提供者的奖励,从而在满足换电站服务质量水平约束的条件下最大化换电站的运营效益。     

秦山三期重水堆核电工程安全壳结构强度验证试验和整体密封性试验

作为我国首座无钢衬里安全壳,秦山第三核电有限公司认真研究了其混凝土吸纳/缓释效应强、贯穿件薄弱等特点,精心准备试验方案和应急处理措施,最终取得了安全壳密封性试验结果和试验耗时居世界同类电站领先地位的佳绩。在试验中开创性地使用了安全壳内部压空自供应系统,实现了不停运壳内工艺系统进行试验的目标;集成、开发了专用于安全壳强度验证试验和安全壳整体泄漏率试验的测试系统;在国内安全壳试验领域率先成功组织了高气压环境下的大规模作业。     

高模量碳纤维在中国宇航结构产品上的应用现状及实现自我保障的建议

实现高模量碳纤维复合材料的自我保障对中国国防建设与航天事业发展具有重要的战略与实践意义.重点介绍了高模量碳纤维在中国宇航结构产品上的应用现状及需求,阐述了高模量碳纤维的特点、制备工艺、关键技术及研究现状等,分析了现阶段中国高模量碳纤维发展存在的主要问题,有针对性的提出了实现自我保障的建议.     

合成氨、尿素生产蒸汽自给技术小结

简述了安徽昊源化工有限责任公司合成氨、尿素系统联合热力网络蒸汽自给实施情况 ,预测了全行业推广后的经济及社会效益     

Electronic-Grade High-Quality Perovskite Single Crystals by a Steady Self-Supply Solution Growth for High-Performance X-ray Detectors

High-quality perovskite single crystals with large size are highly desirable for the fundamental research and high energy detection application. Here, a simple and convenient solution method, featuring continuous-mass transport process (CMTP) by a steady self-supply way, is shown to keep the growth of semiconductor single crystals continuously stable at a constant growth rate until an expected crystal size is achieved. A significantly reduced full width at half-maximum (36 arcsec) of the (400) plane from the X-ray rocking curve indicates a low angular dislocation of 6.8 × 10⁶ cm⁻² and hence a higher crystalline quality for the CH₃NH₃PbI₃(MAPbI₃) single crystals grown by CMTP as compared to the conventional inverse temperature crystallization (ITC) method. Furthermore, the CMTP-based single crystals have lower trap density, reduced by nearly 200% to 4.5 × 10⁹ cm⁻³, higher mobility increased by 187% to 150.2 cm² V⁻¹ s⁻¹, and higher mobility–lifetime product increased by around 450% to 1.6 × 10⁻³ cm² V⁻¹, as compared with the ITC-grown reference sample. The high performance of the CMTP-based MAPbI₃ X-ray detector is comparable to that of a traditional high-quality CdZnTe device, indicating the CMTP method as being a cost-efficient strategy for high-quality electronic-grade semiconductor single crystals.     

Ruthenium (II)-Coordinated Supramolecular Metallodrug Complex Realizing Oxygen Self-Supply In Situ for Overcoming Hypoxic Tumors

Tumor hypoxia greatly limits the antitumor therapeutic efficacy of oxygen (O₂)-dependent treatments. The common strategies of doping O₂ generating compounds into one “package” may lead to insufficient O₂ supply in situ in cancer cells due to the relatively low loading content, limited reproducibility, and uncontrollable release kinetics. Herein, organometallic drug complexes combined with a supramolecular interaction strategy are proposed to realize a stable and efficient O₂ self-supply in situ for overcoming hypoxic tumors. A ruthenium (II)-coordinated supramolecular metallodrug complex (RuSMDC) is first designed and synthesized via host–guest interactions between two functionalized drug molecules, in which ruthenium is used to catalyze the decomposition of hydrogen peroxide to produce O₂. The obtained RuSMDC further self-assembles into Ru-containing supramolecular metallodrug micelles (RuSMDMs), which provides sufficient O₂ for chemotherapy and photodynamic therapy (PDT) oncotherapy in an anaerobic tumor environment. In vitro and in vivo studies further confirm that RuSMDMs effectively alleviate the tumor hypoxic environment, greatly improve the therapeutic effect of chemotherapy and PDT oncotherapy, and reduce the systemic toxicity to normal organs.     

关于超高层建筑中自备应急发电机组的设计探讨

主要对在建筑高度超过250m的超高层建筑中如何合理、有效地设置自备应急发电机组进行了较详细的分析探讨,并阐述了超高层建筑中自备应急发电机组的设计原则与思路,可为类似建筑中自备应急发电机组的设计提供借鉴。     

国产100kt/a双加压法硝酸装置蒸汽不能自给原因浅析

从设备、机组、工艺等方面分析了国产100 kt/a双加压法硝酸装置蒸汽不能自给的原因。针对存在的问题,提出了改进建议,如提高"四合一"机组技术性能、提高工艺设计和设备制造水平、加强管理等,以使国产化双加压法硝酸装置赶上或达到世界先进水平。     

自备电厂电量交换点电压等级选择

针对企业自备电厂的特点,通过工程实例说明要有合理的电气主接线,就应该正确选择自备电厂电量交换点。并提出应该从负荷分布情况、机组容量和数量、短路水平和配电电压等四个方面来确定电量交换点的电压等级。