大直径钢筋混凝土圆筒仓仓壁厚度的探讨

1问题分析《钢筋混凝土筒仓规范》GBJ77－85对直径小于或等于15m的圆筒仓仓壁厚度取值作了规定，而直径大于15m的情况未提及。本文以散装储库为例，探讨直径大于15m的圆筒仓仓壁厚度的合理取值。确定仓壁厚度需进行三种计算：强度计算、变形验算及裂缝宽度验算。根据规范GBJ77－85，圆筒仓的仓壁为－圆柱薄壳，强度计算时按无矩理论计算其薄膜内力。贮料侧压力作用下产生的环向拉力全部由环筋承担，与仓壁厚度无关；而仓顶荷载、仓壁自重、贮料摩擦力、风载、地震作用等共同作用下产生的竖向力由混凝土及竖向钢筋承担，由此确定的仓壁厚…     

浅析电石贮仓设计方案

论述５０００吨电石贮仓的设计与实施方案。     

指数曲线贮仓的设计剖析

贮仓是许多工业过程中的常用设备，起拱是贮仓使用时常出现的故障，如何解决起拱问题是贮仓设计的关键，除常采取增大仓壁倾角、设置破拱装置等方法外，设计成曲线贮仓也是行之有效的措施之一。分析了指数曲线贮仓的工作原理和特点，建立了仓壁指数曲线方程，阐述了设计步骤与注意事项，并举例说明。     

防锈铝炭黑贮仓的设计、制造与吊装

防锈铝炭黑贮仓为一锥底、锥顶圆筒形贮罐,罐体材料为LF5铝镁合金。介绍了防锈铝炭黑贮仓的设计,制造、焊接和吊装。该贮仓达到了西德布勒公司的技术要求,它的制造成功,节省了外汇,降低了成本,其经验可供其他橡胶厂大贮仓设计、制作和吊装时参考。     

PLC在渣仓贮卸系统中的应用

介绍可编程序逻辑控制器（PLC）在硫铁矿制酸装置渣仓贮卸系统的应用，以及相应的硬件配置和软件设计。PLC控制系统运行良好，实现了渣仓贮卸系统的自动联锁控制。     

粉状粒状物料拱受力及运动状况分析

1 引言 粉状粒状物料贮仓在水泥行业中广为使用。但各种料仓、筒库、收尘器、集灰斗,甚至旋风预热器下部锥体都可能出现令人十分头痛的结拱断料和塌拱冲料的问题。这里拱的定义是在建筑学拱的范畴基础上推而广之为:物料依靠重力自行塌落的塌落体与还没有塌落的物料的接合界面;它存在于水平面以上的半球面中的任何角度。在上进下出贮仓中不     

在运输和仓贮过程中对汽车进行保护的环保方案

从事工业产品表面保护的世界领先企业Novacel公司向市场推出NOVACEL 9377，这是市场上第一个不含溶剂的粘贴薄膜，用以保护运输和仓贮过程中的汽车车身。推出这一产品的同时，Novacel公司是在实现其可持续发展的政策承诺。     

干煤粉加压输送系统性能提升技改小结

河南能源化工集团鹤壁煤化工有限公司600 kt/a甲醇项目在实现高产的过程中,Shell气化装置干煤粉加压输送系统出现诸如堵料导致跳烧嘴事故、锁斗泄压阀故障导致停2个烧嘴、煤粉给料仓内件磨损等问题。经过不断的总结、研究,采取改进煤粉仓装料袋滤器滤袋、改进煤粉仓装料袋滤器反吹管固定方式、煤粉仓装料袋滤器放空口增设挡板、改造煤粉仓装料袋滤器底锥空气炮氮气管线、煤粉贮仓临时氮气管线限流孔板处增设旁路、煤粉贮仓防爆板改为不锈钢材质、粉煤锁斗充压笛管改为分段式、改进粉煤锁斗泄压管线、加固煤粉给料仓锥体、煤粉给料仓平衡管上增设平衡阀等优化技改措施后,实现了干煤粉加压输送系统的稳定运行,保障了气化装置的长周期稳定运行。     

NOVACEL公司推出9377：在运输和仓贮过程中对汽车进行保护的环保方案

永远处在创新前沿的工业产品表面保护的世界领先企业Novacel公司，很高兴地对外宣布，该公司向市场推出NOVACEL9377，这是市场上第一个不含溶剂的粘贴薄膜，用以保护运输和仓贮过程中的汽车车身。推出这一产品的同时，Novacel公司是在实现其可持续发展的政策承诺。     

中美欧筒仓规范下仓壁的分析设计*

本文从理论依据、侧压比、计算基本参数及进卸料偏心等因素采用的放大系数等方面对中美欧筒仓规范中浅仓的贮料压力计算公式进行了研究。并结合某工程25m直径的钢筋混凝土熟料库，在不同的高径比的情况下，对三本规范计算所得的仓底压力、仓壁水平压力及仓壁摩擦力的变化趋势做了对比。探讨了季节温差与内外温差对仓壁内力的影响，结果表明内外温差会对仓壁产生较大的环向与竖向弯矩，在实际分析设计中应予以充分重视。     

Conceptual design of ammonia‐based energy storage system: System design and time‐invariant performance

Chemicals‐based energy storage is promising for integrating intermittent renewables on the utility scale. High round‐trip efficiency, low cost, and considerable flexibility are desirable. To this end, an ammonia‐based energy storage system is proposed. It utilizes a pressurized reversible solid‐oxide fuel cell for power conversion, coupled with external ammonia synthesis and decomposition processes and a steam power cycle. A coupled refrigeration cycle is utilized to recycle nitrogen completely. Pure oxygen, produced as a side‐product in electrochemical water splitting, is used to drive the fuel cell. A first‐principle process model extended by detailed cost calculation is used for process optimization. In this work, the performance of a 100 MW system under time‐invariant operation is studied. The system can achieve a round‐trip efficiency as high as 72%. The lowest levelized cost of delivered energy is obtained at 0.24 $/kWh, which is comparable to that of pumped hydro and compressed air energy storage systems. © 2016 American Institute of Chemical Engineers AIChE J, 63: 1620–1637, 2017     

焦化储煤场发展趋势探讨

介绍了我国现有储煤场的现状,并对开放式露天煤场、半开放式干煤棚、圆筒仓并列群仓、大型全封闭圆形料场等焦化储煤场工艺优缺点进行了比较分析,指出开放式露天煤场因占地面积大、环境污染严重等缺陷应被逐步淘汰,而后3种储煤工艺具有环保性能好、占地面积小、不易造成煤的流失等优点,是目前新建煤场的发展趋势。     

老挝KCL项目大直径熟料库实仓测试研究

依据老挝KCL项目的大直径熟料库实仓测试成果对上浮式廊道浅圆仓展开分析。在生产环境下对熟料库贮料压力进行测试,发现贮料静止时仓壁处水平压力随埋深的增加而加大,卸料时会出现无规律的波动,但整体呈现减小趋势;廊道顶面的压力值在卸料会出现较小的超压现象,但随卸料的持续总体也逐渐减小。     

国外化学纤维产品开发与应用综述

在全球新一轮产业变革与竞争中,纤维新材料仍然是国民经济发展和现代国防建设不可或缺的重要基石,支撑着现代服装、家纺、安全防护、土工建筑、交通运输、航天航空、生物医学等领域的发展,在国民经济中占有举足轻重的地位。对国外涌现的一批利用现代生物、纳米等技术研究开发的具有特殊的力学、耐热、抗老化等性能和热能吸收储存与转换、阻燃、抗菌、抗紫外、耐污易清洗等功能的纤维新品种的开发与应用进行了梳理和分析。     

A novel electric elastomer based on starch/transformer oil drop/silicone rubber hybrid

The electrorheological fluid composed of starch particles and silicone oil/transformer oil was dispersed into 107 silicone rubber, and then two types of electric elastomers were prepared in the absence and presence of a curing electric field, respectively. The storage modules were measured using dynamic mechanical analysis with the round disk compression clamp. The results indicate that the storage modulus sensitivity of electric elastomers composed of pure transformer oil is the highest, that of electric elastomers composed of pure silicone oil takes second place, and that of electric elastomers composed of mixture oil is the smallest. For the given starch concentration, the storage modulus sensitivity attains a maximum value of 3.88 when the mass ratio between the transformer oil and 107 silicone rubber is 1. For the given mass ratio of 1, the effects of starch concentration and the presence or absence of the curing electric field on the storage modulus of electric elastomers were studied. When the starch concentration is 5 wt %, the storage modulus of the elastomer without the electric field (denoted as A‐elastomer) is 20.1 kPa, whereas that of the elastomer with the electric field (denoted as B‐elastomer) is 101.8 kPa. The storage modulus sensitivity attains a maximum value of 4.07. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Mechanical behavior of starch/silicone oil/silicone rubber hybrid electric elastomer

Two types of electric elastomers were prepared by dispersing a uniform mixture of starch particles and silicone oil into 107 silicone rubber in the absence and presence of a curing electric field, respectively. The elastic modules were tested with dynamic mechanical analysis with the round disk compression clamp. The results indicate that the storage modulus sensitivity attains a maximum value of 0.55 at a mass ratio of 1 between silicone oil and 107 silicone rubber with the given starch concentration. When the mass ratio is 1 and the starch concentration is 10 wt%, the storage modulus of the A-elastomer without the electric field is 37.1 kPa, while that of the B-elastomer with the electric field is 127.9 kPa. The storage modulus sensitivity attains a maximum value of 2.44.     

泡沫金属复合PCM微结构传热储热过程模拟

以石蜡作为相变材料（PCM）,采用六面通圆孔三维结构模型,对泡沫金属复合PCM内相变熔化过程进行了数值模拟。研究了不同材料（Cu、Al、Ni、Fe）泡沫金属孔密度和孔隙率对复合PCM传热和储热性能的影响。结果表明,泡沫金属复合PCM传热过程受热传导和自然对流作用综合影响;随孔密度增加,复合PCM完全熔化时间缩短幅度逐渐减小,且泡沫金属热导率越高,孔密度对传热速率影响越大;泡沫金属复合PCM内存在非热平衡现象,孔密度和孔隙率增加均可减小最大平均温差,但对最终平衡时间的影响却截然不同;此外,泡沫金属复合PCM单位质量储热密度随孔隙率增大而增大,相比泡沫Cu、Ni、Fe复合PCM,泡沫Al复合PCM的单位质量储热密度较大,增加速率也较大。     

Safety and capacity retention of lithium ion cells after long periods of storage

This paper provides the results of simple preliminary tests on the storage characteristics of lithium ion cells in relation to their use for UPS or BPS. Commercial cylindrical 18 650 size cells with a discharge capacity of around 1200 mAh were used in the experiments. The cells consisted of an amorphous carbon anode, a LiCoO₂ cathode and an organic electrolyte. Cells were stored for 1–12 months and then their capacity was measured after constant voltage charging (similar to trickle charging) at 4.1 or 4.2 V and 21 or 60 °C. After measuring the capacity, the cells were crushed with a round 15 mm bar in diameter as an example of a fundamental abuse test. The residual cell capacity after 10 years of 4.2 V constant charging at 20 °C was predicted to be approximately 65%. This exceeds our tentative target of 50%. We also found that no cells smoked, ignited or exploded when crushed. We also measured the cell capacity after simple storage (i.e., after self-discharge).     

不锈钢绕带容器环板与绕带端头的焊接

本文通过焊接试验对奥氏体不锈钢绕带容器环板与绕带焊接工艺进行了研究分析,并得出了合理的焊接方法和工艺参数。     

新型高效3D圆阀塔板的实验研究

详细分析了新型高效3D圆阀的设计原理和特点. 在1000 mm′350 mm规格的矩形实验塔中,应用典型的水-空气冷模实验系统对3D圆阀和F1型浮阀两种塔盘进行了对比实验研究,测定了多种气液负荷下两种圆形浮阀塔板的板压降、雾沫夹带和漏液量等流体力学性能. 利用氧解吸法测定了两种浮阀塔板的传质效率. 实验结果表明,在相同条件下,3D圆阀塔板的板效率比F1型浮阀塔板提高约20%左右,雾沫夹带量比F1型浮阀塔板略小,在工业应用范围内,3D圆阀的板压降和漏液量均比F1型浮阀小,是一种综合性能优良的新型圆阀.