电弧炉工作层耐材砌衬技术改造及其经济效益

阐述了根据生产实际情况,改造了宁夏恒力集团有限公司炼钢分厂18t电弧炉工作层耐材砌衬的材质及砖型,从而降低了工人的劳动强度,提高了工作效率,降低了企业生产成本,提高了经济效益。     

2号机低压缸叶片断裂原因分析及改进措施

2号机组运行中发生了多次叶片断裂事故,严重影响了设备的安全、稳定运行。对机组历次断叶片情况进行了分析与总结,得出了故障原因,结合机组大修进行了改造,取得了良好效果。     

750 kV两站两线科研项目管理

针对兰州超高压输变电公司科研项目管理模式进行了研究与分析,提出了科研项目分解的方案,通过本方案明确了基本课题,可以较为全面、系统指导科研工作的开展,增强了科研项目实施的可操作性。构建了矩阵式科研项目管理组织结构,优化配置了公司各科研资源,明确了科研项目的各主要责任主体。确立了科研项目管理流程,做到闭环控制,加强了科研项目过程管理。     

真空技术应用理论分析

本文介绍了真空隔热技术在电冰箱生产中的应用,具体分析了真空隔热板构造、传热及使用特点,指出了提高真空隔热板绝热性能的途径及要求,分析了真空隔热技术使用中存在的问题及解决方法,并展望了其应用前景.     

1341材料在循环水泵上的应用

对热电厂发电机的三台循环水泵的运行状况进行了分析,并用BELZONA1341材料对水泵叶轮的表面进行了处理,减少了叶轮表面与水流的阻力和涡流的产生,降低了电机的有功电流,节约了电能,并且延长设备的寿命,效果十分明显.     

紫油机微粒过滤器的研究

介绍了柴油机微粒的组成及产生的原因;阐述了柴油机微粒过滤器设计时要考虑的问题;介绍了紊流沉淀器的结构及工作原理.在此基础上设计了一个柴油机微粒催化过滤器并进行了相应的实验,达到了预期成果.     

写在新财年到来时——2009，MI为你支招拼经济

自从那复杂的“次贷危机”开了头,金融海啸也跟着来了,中国GDP指数从两位数跌到个位数了,企业倒闭了,某某又被裁员了……面对这场“浩劫”,考验企业们的“抵抗力”的时候到了,而除了防守外,企业经营者们更应该主动出击。     

蓄热式加热炉燃烧系统的改造

针对轧钢加热炉加热能力不足,自动化控制水平落后的情况,对加热炉进行了改造,更换了单蓄热式空气烧嘴,并对自动控制系统进行了升级改造,从而提高了加热能力和自动控制水平,降低了煤气消耗,取得了良好的经济效益。     

两轮摩托车振动耐久试验台的设计

阐述了摩托车振动耐久试验台的设计方案。方案中描述了两轮摩托车振动耐久试验台的结构组成,详细介绍了系统的关键硬件电路,提出了车速控制策略,给出了车速的实时测量和控制流程图。实验表明,摩托车振动耐久试验台为摩托车的振动耐久检测提供了方便,高效,节能的试验平台。     

产品质量自动缺陷管理机制在丰田公司应用

解释了质量管理和质量保证的含义,归纳了丰田公司质量管理行为的演变历程。指出了统计质量控制的弊端,阐明了自主化质量管理的含义、实现方法和作用。分析了缺陷管理的直观判断法、机械辅助检查法、自动装置法,并给出了应用自动装置系统的实例。     

基于风能利用的机械蒸汽压缩海水淡化系统模拟

通过对机械蒸汽压缩(mechanical vapor compression,MVC)-多效蒸馏(multi-effect evaporator,MEE)海水淡化系统建立模型,研究了压缩机输入功率与海水淡化系统运行参数之间的关系,分析了系统中压缩机与多效蒸发器之间相互耦合的匹配关系,探讨了辅助能源加热对系统运行状态及产水率的影响,并通过耦合风力发电机模型,研究了系统淡水产率随风电功率随机变化的响应曲线。结果表明:随压缩机输入功率的增加,多效蒸发器效间的传热温差增大,产水率也近似线性增加;辅助能源虽然有助于提高产水率,但其添加量不能超过一定的上限;对于一组平均为7.1m/s的随机风速,海水淡化系统的平均产水率为5.00t/h,平均产水能耗10.2kWh/t,而若采用20%辅助能源加热,可以使平均产水率提高0.21t/h。     

Design of an ocean thermal energy plant ship to produce ammonia via hydrogen

The 43°F (24°C) temperature difference that exists between surface water and deep water at selected sites in tropical oceans can be used to drive a heat engine to produce electric power, electrolyze water, and produce ammonia from the resulting hydrogen plus nitrogen from the air. A baseline design has been developed for a 100-MWe Ocean Thermal Energy Conversion (OTEC) plant-ship that would produce 313 tons per day of ammonia. The cost estimates for this design have been extrapolated to 500-MWe plant-ships to produce ammonia (for fertilizers and chemicals) or liquid hydrogen for shipment to the U.S. It is judged that ammonia will be producible at competitive cost ($96/short ton in 1975 dollars) by the sixth and subsequent plant-ships in the mid-1980s. This production by OTEC/ammonia plants would conserve supplies of natural gas or other fossil fuels now used to produce ammonia on shore. For the longer term (1990s), liquid hydrogen from OTEC plants should become competitive as demands for this clean fuel and efficient ways for employing it in larger markets (fuel cells, transportation, etc.) come to maturity.     

Design and exergetic analysis of a novel carbon free tri-generation system for hydrogen,power and heat production from natural gas,based on combined solid oxide fuel and electrolyser cells

The Solid Oxide Cells (SOCs) are able to operate in two modes: (a) the Solid Oxide Fuel Cells (SOFCs) that produce electricity and heat and (b) the Solid Oxide Electrolyser Cells (SOEC) that consume electricity and heat to electrolyse water and produce hydrogen and oxygen.     

非木纤维常压酸碱法制浆新工艺的清洁生产分析

本文简述了非木纤维常压酸碱法制浆新工艺,并进行了该工艺的清洁生产分析,得出该工艺具有污染物产生量少,产品性质好、纸浆得率高,设备投资少,能源、资源消耗低的特点,是典型的清洁生产工艺。     

Recent advances on electrocatalytic and photocatalytic seawater splitting for hydrogen evolution

Hydrogen is a clean and renewable energy source, which has aroused increasing attentions. Water splitting can effectively evolve hydrogen. Since freshwater is scarce, the direct exploitation of seawater as the feedstock to produce hydrogen has become a hotspot. Such direct exploitation can lower the cost of hydrogen produce and facilitate the rational exploitation of seawater resources. Over the past few years, advanced technologies (e.g. photocatalysis, electrocatalysis and photoelectrocatalysis) have been introduced into seawater splitting and have showed significant potentials. In this study, representative reports on photo-electro-catalytic seawater splitting to produce hydrogen were comprehensively reviewed. Besides, advancements and defects of each process were discussed. Furthermore, recommendations for subsequent study in this research field have been proposed.     

Wind power generation with a parawing on ships,a proposal

It is proposed that electric power can be generated from wind by pulling a ship. A parafoil pulls and tows a ship. Electrical power is generated by hydraulic turbines installed on the ship below the water line. The electric power generated is expended onboard to electrolyze water to produce hydrogen or methanol or to convert carbon dioxide into storable forms of liquid. This paper describes the principle of designing such a system, shows the general features of such a system, and describes in detail two example designs which produce 6 MW and 0.8 GW. It is shown that a fleet of such ships operating in two different regions of the sea can produce much more energy than the world needs.     

秸秆人造板项目碳减排计量方法学研究

利用农作物秸秆生产人造板的产业化技术已经成熟,秸秆人造板项目碳减排计量方法学是进行中国自愿减排碳交易的必要技术依据。基于万华生态板业（信阳）有限公司秸秆人造板的生产工艺,对秸秆燃烧或腐烂、以木材为原料生产人造板（基准线情景）和秸秆用作人造板的生产原料（项目情景）的温室气体排放量进行了分析和评价,探索与研究了适合我国秸秆人造板项目碳减排计量方法,得出了生产 1 m3农作物秸秆板的碳减排量约为1.42 tCO2e。本文可为我国秸秆人造板项目碳减排的计量提供技术指导。     

20#锻件冲击值偏低原因综合分析及改进建议

用20#圆钢制做锻件是生产中非常常见的热加工方式,而且,锻件的热加工工艺也不复杂。但是,如果一味的追求生产效率、追求节能降耗,不注意按生产工艺生产,会导致批量的不合格产品出现。本文针对20#圆钢所产生的冲击值偏低而进行了综合分析和研究,并提出了改进建议。     

Two-stage VSA/PSA for capturing carbon dioxide (CO2) and producing hydrogen (H2) from steam-methane reforming gas

A two-stage vacuum/pressure swing adsorption (VSA/PSA) process has been investigated for CO₂ capture and then H₂ production from steam methane reforming (SMR) gas mixture. The target is to produce ultra-pure hydrogen and high-purity CO₂. Many fundamental research studies have been carried out to validate the accuracy of numerical calculation, such as isotherm measurement, fitting and process modelling. The results indicate that the first stage process could produce 95.31% CO₂ with the recovery of 90.93% and the second stage could produce 99.9952% H₂ with an overall recovery of 71.16%. Variable analysis, optimal conditions and comparison with other processes are discussed in detail.     

Performance analysis of double-pass oscillating bed solar dryer for drying of non-parboiled paddy grains

Drying of agricultural produce like paddy grains is necessary for reducing moisture content in them to the required level towards diminishing the deterioration and enhancing the storage time. Conventionally, open-space sun drying is widely used to reduce the moisture content of the most of the agricultural produce.. Now-a-day, so many solar dryers are used for drying agricultural produce. In the present work, a double-pass oscillating bed with a double-pass flat plate collector has been used for drying of non-parboiled paddy grains. The bed oscillated at a frequency of 2.75 Hz. The oscillating bed solar dryer can dry 45 kg of non-parboiled paddy grains in just a single day to the required level of moisture content, and the average moisture present in the dried grains was 13.55%. The average dryer thermal efficiency and pick-up efficiency in non-parboiled paddy were 28.79% and 52.17%, respectively.