Waste heat recovery from hot steel slag on the production line:Numerical simulation,validation and industrial test

Waste heat recovery from hot steel slag was determined in a granular bed through the combination of numerical simulation and an industrial test method.First,the effective thermal conductivity of the granular bed was calculated.Then,the unsteady-state model was used to simulate the heat recovery under three different flow fields(O-type,S-type,and nonshielding type(Nontype)).Second,the simulation results were validated by in-situ industrial experiments.The two methods confirmed that the heat recovery efficiencies of the flow fields from high to low followed the order of Nontype,S-type,and O-type.Finally,heat recovery was carried out under the Nontype flow field in an industrial test.The heat recovery efficiency increased from~76%and~78%to~81%when the steel slag thickness decreased from 400 and 300 to 200 mm,corresponding to reductions in the steel slag mass from 3.96 and 2.97 to 1.98 t with a blower air volume of 14687 m^(3)/h.Therefore,the research results showed that numerical simulation can not only guide experiments on waste heat recovery but also optimize the flow field.Most importantly,the method proposed in this paper has achieved higher waste heat recovery from hot steel slag in industrial scale.

Research on Test Methods for AI Industrial Application Capabilities of Smart Mobile Terminals

A test method and system for AI industrial application capabilities of smart terminals. The method includes the following steps: According to the temperature change values of different AI industrial applications executed by standard smart terminal equipment under different equipment parameters, the equipment parameters and temperature changes of standard smart terminal equipment are constructed. Correlation model;obtain the device parameters of the smart terminal device to be tested, and obtain the predicted value of the temperature change of the smart terminal device to be tested based on the correlation model between the device parameters of the standard smart terminal device and the temperature change;Measure the actual value of the temperature change of the intelligent terminal device executing different AI industrial applications;obtain the test result of the intelligent terminal device to be tested according to the predicted value of the temperature change and the actual value of the temperature change.

Significant Breakthrough in Industrial Test of the "Methanol to Olefins" Process Developed by Dalian Institute of Chemical Physics,Chinese Academy of Sciences

A process of ＂Methanol or Dimethylether to Olefins＂ developed by Dalian Institute of Chemical Physics （DICP）, designated as the DMTO process, has attained great success in industrial scaling up testing. DICP, by collaborating with the Xinxing Coal Chemical Co., Ltd. of Shaanxi Province and the Luoyang Petrochemical Engineering Co. of the SINOPEC Group, operated successfully a 50t（methanol）/d unit for the conversion of methanol to lower olefins, with a methanol conversion of close to 100%, and a selectivity to lower olefins（ethylene, propylene and butylenes） of higher than 90%. On 23rd August, the industrial test project has passed a state appraisal. The experts of the Appraisal Group, headed by Prof. YUAN Qingtang, academician of Chinese Academy of Engineering, drew the conclusions that the DMTO process, by utilizing a proprietary SAPO-34 catalyst system and a recycling fluidized bed reaction system for the production of lower olefins from methanol, is the first unit in the world having a capacity of producing nearly ten thousand tons lower olefins per year. The technological level of the industrial test is at a leading position internationally. This accomplishment will provide a sound base for the subsequent commercialization of the DMTO process.

Industrial testing of property-modified prebaked carbon anode for aluminum electrolysis

Aiming at reducing energy and carbon consumption and enhancing current efficiency of aluminum electrolysis, a batch of property modified prebaked carbon anodes prepared in industrial production were applied to 160 kA prebaked anode aluminum electrolysis cells in a domestic aluminum company. The industrial statistical data show that, the property modified anodes can averagely reduce carbon consumption 11.6 kg per ton aluminum and energy consumption 106.1 kW·h, further more, enhance current efficiency 0.72%. The industrial testing results prove that this kind of new type of prebaked anodes has remarkable effect of saving energy, reducing carbon consumption and enhancing current efficiency of aluminum electrolysis.

Analysis of Standards Establishment for the Testing of Electrical Appliances

As science and technology continue to develop,power equipment has become an indispensable part of industrial production and daily life.Whether it is the precise automation machinery utilized on production lines or the convenient electrical appliances found in households,their functionality relies heavily on electrical technology.Nonetheless,without stringent safety and performance assurances,these devices could potentially endanger lives and property.Thus,this paper explores the development strategy for establishing a standardized system within the electrical testing service industry,aiming to ensure safety and reliability.

Semi-Industrial Test of Underground Coal Gasification In Well No.2 in Xinhe, Xuzhou

The necessity of underground coal gasification is explained. The condition,technology character,and process of the semi-industrial test of underground coal gasification in well No. 2 at Xinhe, Xuzhou,are introduced. The test results indicate that the technique of long tunnel,large sectiou,two stage underground coal gasification can obtain a large output of coal gas with a high heat value, making the working process stable. So the feasibility of the new techuology is verified. It can be concluded that there will have a good application prospect of the technique in China.

Research of Large Field of View Scan Mode for Industrial CT

For industrial computed tomography systems, generation II scan mode has a large field of view but time consuming and generation III has a small field of view but fast. In order to realize the rapid ICT test of large objects, a scan mode based on generation III called large field of view scan was discussed and its reconstruction algorithm based on FBP was deduced. The validity of the algorithm was verified by the results of computer simulation and experiments. Analysis showed that the effective scan field of view could be improved by more than 90% compared with that of generation III.

Time Delay Characteristic of Industrial Wireless Networks Based on IEEE 802.15.4a

The IEEE 802.15.4a standard provides a framework for low-data-rate communication systems,typically sensor networks.In this paper,we established a realistic environment for the time delay characteristic of industrial network based on IEEE 802.15.4a.Several sets of practical experiments are conducted to study its various features,including the effects of 1） numeral wireless nodes,2） numeral data packets,3） data transmissions with different upper-layer protocols,4） physical distance between nodes,and 5） adding and reducing the number of the wireless nodes.The results show that IEEE 802.15.4a is suitable for some industrial applications that have more relaxed throughput requirements and time-delay.Some issues that could degrade the network performance are also discussed.

Properties of Debadib Evaporates (Northern Tunisia) for Potential Use in Industrial Fields

Gypsum is widely distributed in Tunisia occurring in the formation of Triassic age. The gypsum deposit of Mellegue is the alabastine type with a little of the porphyroblast type and contains traces of clay minerals and calcite. It is a moderately strong rock in terms of its unconfined compressive strength of 16 Mpa and tensile strength of 3.35 Mpa. Triaxial testing values indicated an apparent cohesion of 10 Mpa and an angle of friction of 26°. The gypsum studied had a percentage of SO3 of 41.71% and a percentage of CaO of 32.9%. All the samples had low densities according to the International Association of Engineering Geology (IAEG) classification and exhibited a moderate porosity whether effective or absolute. The gypsum proved to be moderately strong when tested in unconfined compression and tensile strength. Thermal analysis indicated a total weight loss of 20.27% and the whiteness index about 90%. This proved a high degree of whiteness. The time of setting can be considered short and medium, which is quite favorable for industrial application compared with other gypsum deposits currently operated.

Performance and Industrial Application of New-Type Sulfur Tolerant CO Shift Catalyst QDB-04

This paper presents the performance and characteristics of new-type sulfur tolerant shift catalyst QDB-04 and its industrial side-line test as well as the first-time industrial application in Lunan Chemical Fertilizer Plant of Shandong in China. The results show that the catalyst has high strength and strength stability, good low temperature activity and stability as well as low potassium bleeding ratio which well meet for the requirements of the methanol plant on catalyst performance in Lunan Chemical Fertilizer Plant.

Economic Growth,Industrialization,Trade,Electricity Production and Carbon Dioxide Emissions:Evidence from Ghana

The study scrutinized correlation between electricity production,trade,economic growth,industrialization and carbon dioxide emissions in Ghana.Our study disaggregated trade into export and import to spell out distinctive and individual variable contribution to emissions in Ghana.In an attempt to investigate,the study used time-series data set of World Development Indicators from 1971 to 2014.By means of Autoregressive Distributed Lag(ARDL)cointegrating technique,study established that variables are co-integrated and have long-run equilibrium relationship.Results of long-term effect of explanatory variables on carbon dioxide emissions indicated that 1%each increase of economic growth and industrialization,will cause an increase of emissions by 16.9%and 79%individually whiles each increase of 1%of electricity production,trade exports,trade imports,will cause a decrease in carbon dioxide emissions by 80.3%,27.7%and 4.1%correspondingly.In the pursuit of carbon emissions’mitigation and achievement of Sustainable Development Goal(SDG)13,Ghana need to increase electricity production and trade exports.

Ministries Design Exchange Rate Stress Test for Labor-Intensive Industries

China’s Ministry of Commerce(MOFCOM)and the Ministry of Industry and Information Technology(MIIT)have designed a stress-test for China’s labor-intensive industries,

茶叶生产装备自动化与智能化技术研究进展与展望

茶产业是我国传统特色优势产业,大数据、物联网、云计算等新一代信息技术与农业的融合促进了茶产业向智能化转型与升级,在茶叶全产业链赋能增效中发挥重要作用。本文在概述了茶产业智能化技术体系的基础上,围绕种植、加工、检测和销售等4方面总结了国内外信息技术在茶产业智能化中应用的研究成果,分析了茶产业实现智能化的关键技术。最后对茶产业智能化未来发展方向进行展望,建议增强茶产业信息技术基础设施建设、加强人机协作智能茶机设备研发、重视茶叶种植加工大模型开发、提升大数据分析助力茶叶销售能力,为更好利用信息技术进行茶产业升级奠定基础。

常州市检验检测行业发展现状及策略探析

检验检测行业隶属于科技服务业,被誉为“工业之眼”,是国家质量基础设施的重要组成部分。为助力常州市检验检测行业高质量发展,本文基于调研走访结果,分析了常州市检验检测行业发展现状,提出行业高质量发展对策建议,助力本土检验检测服务业做优做强。

日本浅表层水合物勘查试采进展

海洋孔隙填充型水合物已得到较广泛资源调查和经过数次试采,与之相比,以赋存于冷泉、泥底辟和泥火山附近的海底表面和近海底沉积物为主的浅表层水合物的勘查试采工作刚刚起步。日本作为最早实施水合物勘查试采的国家之一,自2013财政年以来在浅表层水合物的资源勘查评价、海洋区域地质调查和环境调查、开发技术调研评价、生产系统构建等方面取得了显著进展。基于文献资料调研,概述了日本水合物研发工作的发展历程以及对浅表层水合物研发工作的整体部署,详细介绍了日本在浅表层水合物勘查试采相关领域开展的主要工作,分析认为,日本在如下4方面取得的实际经验和理论认识值得我国浅表层水合物勘查试采体系化部署借鉴参考:以日本海为主的区域性资源和环境调查,以小范围区域为对象的资源量评价示范,以试采场地优选为目标的精细化资源和环境调查,以及“以使用大口径钻头的大范围垂直采掘方法为基础、优先考虑气体举升回收方法和船载分离方法两项关键技术以形成最优组合”的生产系统设计原则的评估确立。

工业电子雷管在拆除爆破中的应用

近年来,工业电子雷管的产量总体保持高速增长,主要应用于露天土岩和隧道掘进爆破领域,在拆除爆破领域的使用量不足5%。为分析工业电子雷管在拆除爆破应用过程中存在的问题,结合拆除爆破工程案例,发现逐发扫描录入雷管的效率较低,需提高工业电子雷管起爆系统单台起爆器的起爆能以及扫描录入雷管和连接卡扣的效率。结合大规模工业电子雷管起爆网路试验,发现工业电子雷管起爆网路的传爆可靠性较高,雷管的报错率为0.03%~0.07%,拒爆率为0.02%;通过扫描盒条码录入雷管,可显著提高连网的操作工效。在拆除爆破工程中,需要根据结构的倒塌运动过程合理设置构件的起爆时间,根据工程规模定制合适的盒包装雷管数量,从而提高工业电子雷管起爆网路的适用性。

集成电路测试新工科人才产教融合培养模式探索与实践

集成电路测试是集成电路设计制造产业中的重要环节。针对目前国内集成电路测试行业专门技术人才紧缺的现实需求,合肥工业大学联合国内外集成电路产业知名企业,从课程教学内容与教学方法、实验平台建设与实验设计、创新能力培养与学科竞赛等环节入手,在仪器类专业探索现阶段适合于集成电路测试新工科人才培养的校企合作办学模式。近年来,在集成电路测试课程体系完善、实验平台建设、实践环节培养等方面均取得较好的成果,为新工科人才产教融合培养提供实践经验和参考案例。

工业CT技术在铝内胆碳纤维全缠绕气瓶缺陷检测中的试验研究

由于铝内胆碳纤维全缠绕气瓶(Ⅲ型瓶)具有轻量化、强度高等优点,在氢燃料电池汽车、呼吸器用复合气瓶等领域应用广泛。为实现在不拆卸气瓶条件下检验Ⅲ型瓶的安全状况,本文在试验气瓶上制作了缺陷进行试验研究,验证了工业CT技术用于Ⅲ型瓶缺陷检测的可行性,指出探索工艺参数设置和缺陷识别是下一步的研究方向。

现代服务业综合试点是否促进绿色创新

现代服务业综合试点是推动绿色创新的重要抓手。不但现代服务业综合试点对绿色创新的促进作用在科技服务业占比较高的地区相对更大,而且现代服务业综合试点能促进绿色金融改革创新试验区和“碳排放权”交易试点地区的绿色创新效率快速提升。现代服务业综合试点政策能直接提升一地区的绿色创新能力,而且还能提升周边地区绿色创新能力,各地区综合试点政策对周边地区绿色创新能力具有显著的促进作用。虽然现代服务业综合试点能促进一线城市和二线城市绿色发明专利申请量增长,但现代服务业综合试点不能促进四线城市和五线城市绿色发明专利申请量增长。