液化石油气储存方法与关键设备技术

ＬＰＧ需求量的迅速增加,因此提出了大规模储存的要求,文章介绍了ＬＰＧ的主要储存方式和低温压力储存的主要设备－低温储罐,并对其结构,材料进行了详细的分析和对比。     

冬储水泥性能的研究

水泥冬储是东北地区水泥生产企业较为普遍的做法,为了跟踪水泥储存时间长短对水泥性能的影响,化验室开展了为期八个月的试验,并从试验结果中显现一些特性,这些特性将有助于我厂今后水泥的储存,同时为用户正确使用冬储水泥提供了技术参数,现将试验结果予以分析,供水泥生产厂及使用者参考。     

低温常压LPG储存及布置的探讨

简述ＬＰＧ 储库采用低温储存的经济合理性和安全可靠性;介绍参照执行的有关标准规范,并对低温ＬＰＧ 储罐布置进行探讨。     

导电橡胶环境适应性研究

分析了导电橡胶条的自来水浸泡试验、盐水浸泡试验及盐雾试验,研究了影响导电橡胶环境适应性的主要因素。结果表明,有机硅烷偶联剂的合理应用,可改善导电橡胶的防潮、防盐雾性能,导电橡胶的表面光洁度和致密性越高,疏水性越好,防水浸泡性能越好。对比了不同储存方式对导电橡胶导电性的影响程度,说明合理储存导电橡胶也是确保导电性能的必要条件。     

用大型钢板库解决淡季生产水泥的储存问题

０引言刘耀等关于“我国北方地区冬春季节水泥长期储存的探讨”一文[１]，通过详实的试验数据论证了在一定条件下，可以解决销售淡季连续生产水泥的储存难题。笔者的实践也完全证实了该探讨的实用效果，而且利用近似真空储存的大型储库，在确保水泥质量的基础上，以更大的储量和更长的储期，形成了经济实用的储存方式。１９８７年，因苦于淡季水泥滞销的困境和由此造成的经济损失，建造了１座万吨钢板散装储库，其储量按出磨水泥累计超过１．８万t。储库建成后，不仅彻底解决了连续生产的难题，而且取得了显著的经济效益。１９９０年冬储存…     

甲醛溶液储存条件探究

本文讨论了甲醛水溶液储存的优化条件，以及延长储存时间、避免形成多聚甲醛、控制甲酸含量上升速度的措施和要求。     

航空炮弹储存可靠性统计分析

运用可靠性失效物理分析和统计分析方法 ,以航 30 - 1炮弹为例 ,依据试验结果 ,采用经典法与 Bayes法对比计算可靠度 ,进行可靠性分析研究 ,为保证航空炮弹的可靠性提出改进措施     

液氨储存蒸发装置的安全生产与自动控制

遵循安全性、先进性、可靠性的原则,介绍设计选用DCS集散控制系统,如何实现化工生产工艺中液氨储存和蒸发装置的自动化控制技术改造,以满足安全生产的需要。     

二氧化碳储存技术的研究现状

面对巨大的一次能源消耗以及二氧化碳排放量的急剧上升,利用各种技术来储存从集中排放源分离得到的大量的二氧化碳成为控制大气中二氧化碳浓度的关键.介绍了几种二氧化碳的储存方法:地质储存、陆地生态系统储存、生物储存、海洋储存和矿物储存技术的基本原理及其具体应用情况.全面概述了各种二氧化碳储存技术的国内外研究进展,讨论了各种技术的优缺点,并提出了今后研究的重点.     

煤场褐煤存放的试验研究

通过对褐煤在露天煤场存放试验,分析褐煤在露天自然堆放过程中的热值、质量变化情况,提出褐煤储存及煤种分堆存放等储存管理建议。     

重力掺混料仓中颗粒混合效果的实验研究

通过实验介绍了颗粒物料在料仓中的流动形式及颗粒混合机理，提出了粒料通过垂直管开孔的流率计算方程，针对重力掺混的特性，确立了评价颗粒混合效果的混合指数计算模型，用于中试实验，证明了中试重力掺混仓设计的合理性。     

Characterization of the Thermal Response of Munitions in Storage Exposed to Real and Arbitrary Weather Conditions

The objective of this investigation is to characterize the thermal response of stored munitions exposed to real weather conditions in order to validate current test procedures as well as develop the ability to provide an estimate of the thermal exposure over the lifecycle of a munition. Currently, the thermal history of munitions in storage cannot be determined without continuous monitoring of individual items and there is no method to provide a detailed estimate of the exposure by analyzing existing data when continuous data was not collected. This work describes the experimental and initial numerical investigations of instrumented munitions in storage to characterize their thermal response. The numerical model has the capability to validate broad trends observed from the experimental data. For this investigation, data is being collected through field experiments of inert munitions instrumented with thermocouples that are collocated near a weather station. Data from field experiments are used to develop and validate the numerical model. The numerical model will save time and resources in future investigations of the thermal exposure of munitions in storage as well as advance the understanding of the implications of selecting a long term storage environment. At a fundamental research level, this work contributes to the advances in combined heat transfer by natural convection and radiation inside a 3D enclosure combined with external forced convection and radiation. The numerical model includes several features including heat transfer to the enclosure by solar radiation, conduction, and forced convection, heat transfer between the enclosure container walls and the projectiles by radiation, conduction, and natural convection, heat transfer within the projectile by conduction, distributed thermal energy storage in projectiles, and transient temperature boundary condition at the enclosure walls.     

甲基紫试验法判别火药贮存安全性标准研究

甲基紫试验法判别火药贮存安全性,火药样品经老化处理后,根据实验方法要求分别开展96℃3h特征气体的含量测定、安定剂含量测定、112.5℃维也里正常重复一小时试验、热失重试验和甲基紫法5个项目的性能试验,通过对火药的甲基紫变色时间与维也里时数、安定剂含量的数据处理结果的对比分析,可得出各种火药用甲基紫变色时间判定火药贮存安全性的检测标准。     

Concept,Design and Manufacture of a Prototype Hydrogen Storage Tank Based on Sodium Alanate

In the framework of the EC project STORHY (Hydrogen Storage for Automotive Applications), the prototype of a solid storage tank for hydrogen based on sodium alanate was developed. A storage tank containing 8 kg sodium alanate was designed and manufactured with the objective of fast refueling. To obtain the optimum design of the storage tank a simulation tool was developed and validated by experiments with a laboratory‐scale tubular reactor. Application of the simulation tool to different storage concepts and geometries yielded the final design. The chosen concept is modular, enabling simple scale‐up. This is the basis for the future development of fuel cell vehicle storage tanks containing 5 kg of hydrogen.     

储罐采用海水试压的防腐

在地面上建石油储罐,水压试验是储罐建设必不可少的一个重要环节,在沿海地区建设储罐,利用海水做水压试验既可以节省投资,又可以减少淡水资源的浪费,但是防腐是必需解决的问题。阐述了海水对金属腐蚀的原理,介绍了采用阴极保护的方法,解决在试压过程中海水对储罐腐蚀问题,达到了理想的效果。     

Study of the storage performance of a Li-ion cell at elevated temperature

A series of Li-ion cells with a LiCoO₂ cathode, artificial graphite anode and a LiPF₆-based nonaqueous electrolyte were stored at 55 °C in a series of state of charge (SoC) from 0 to 100%. After storage, all the cells except the one stored in 0% SoC exhibited capacity fade and cycling performance decline, which were aggravated by increasing storage SoC. Furthermore, storage at higher SoC increased the safety risk of the cells. The cells stored at SoC higher than 50% could not pass the 3 C/5 V overcharge test, while such a test was easy to pass for the fresh cells and those stored at 0% SoC. The above results show that the fully discharged state is a favorable storage condition to maintain good storage performance of Li-ion cells. In addition, to clarify the aging mechanisms of the cells, XRD (X-ray diffraction), SEM (scanning electron microscopy) and EIS (electrochemical impedance spectra) measurements were carried out. The results indicate that the performance fading of the stored cells is not due to the bulk structure change of the electrode materials, but instead due to the microstructure variation of the cathode, including the decrease in the crystallite dimension, the change of the micro-stress, and the precipitation of the surface films over the electrodes. According to EIS analysis, the increase of the cathode impedance may be the main contributor to the overall degradation of the Li-ion cells after storage.     

Storage Stability of Carrot Chips

Water activity combined with the glass transition temperature can be used to predict the shelf life of foods. Water sorption isotherms and glass transition as a function of moisture content were determined for carrot chips after vacuum frying. The GAB model was fitted to the measured sorption data while the Gordon Taylor equation was used to model the water plasticization effect. The critical moisture content and the critical water activity at which the glass transition occurs were obtained at selected storage temperatures. The changes in moisture content, fat content, water activity, breaking force, β-carotene content, ascorbic acid, and acid value of vacuum-fried carrot chip at selected storage temperatures (0, 10, 25°C) during a 6-month storage period were investigated. The estimated shelf life of carrot chip, defined by the degradation time of the acid value at different storage conditions, was determined.     

基于腐蚀的常压储罐定量RBI方法

根据API 581基于风险的检验(RBI)原理,进行常压储罐定量RBI研究,建立储罐壁板和底板的失效可能性、失效后果与风险等级的分析方法.通过此方法,可针对储罐不同的失效可能性等级和风险等级制定相应的检验策略,达到降低风险的目的,确保长周期安全运行.     

Storage Stability of Carrot Chips

Water activity combined with the glass transition temperature can be used to predict the shelf life of foods. Water sorption isotherms and glass transition as a function of moisture content were determined for carrot chips after vacuum frying. The GAB model was fitted to the measured sorption data while the Gordon Taylor equation was used to model the water plasticization effect. The critical moisture content and the critical water activity at which the glass transition occurs were obtained at selected storage temperatures. The changes in moisture content, fat content, water activity, breaking force, β-carotene content, ascorbic acid, and acid value of vacuum-fried carrot chip at selected storage temperatures (0, 10, 25°C) during a 6-month storage period were investigated. The estimated shelf life of carrot chip, defined by the degradation time of the acid value at different storage conditions, was determined.     

活性石灰在贮存、运输过程中氧化钙含量与活性度变化测试分析

活性石灰吸收空气中的水和二氧化碳后会逐渐失效，在不同贮存、运输条件下，活性石灰在不同贮存时间的氧化钙含量和活性度是不断变化的。通过测试分析，寻找其变化规律，为活性石灰的使用决策提供依据。