小型材轧后双线高效冷却系统的研制与应用

针对济钢第一小型轧钢厂产量大幅度提高后,冷床能力严重不足对产量和质量的不利影响,经过反复的实验和研究,采用了"轻穿水、低过冷、小温差"的冷却原理,研制和应用了一种新型的棒材在线轧后双线高效穿水冷却系统,明显降低钢材上冷床温度,解决了钢材速冷后内部不良组织的产生和明显不同组织形态的相互渗透对焊接性能的不利影响,使得焊接后焊口热影响区的性能与未焊接基材区域的性能相同,解决了以往"强过冷、高温差"淬火式冷却方式存在的问题.     

封闭式SF6组合电器现场安装的质量控制

现代工程越来越重视加强质量管理，提出了“质量是企业的生命”的口号。我国一直强调必须贯彻“百年大计、质量第一”的方针，质量管理工作已经得到了企业领导的清醒认识，企业唯有优良的安装质量并树立良好的市场影响，才是占领市场和发展企业的根本保证。企业施工项目的质量管理控制是从工序质量到分项工程质量、分部工程质量、单位工程质量的系统控制过程。本文着重对封闭式SF6组合电器现场安装的质量控制过程进行详细的论述。     

百年电力3号机组性能试验及经济性分析

介绍了百年电力发展股份有限公司#3机组大修后性能试验,分析了试验结果,并对机组存在的问题及其对经济性的影响进行了分析,提出了相应的解决办法,为机组的运行和检修提供一定的理论依据。     

Optimization of power input diagram of 50 t UHP-EAF

In order to improve operation for shortening tap to tap time and saving electrical energy, on the base of no-linear reactance model, the electrical characteristics of the 50 t UHP-EAF in Fushun Special Steel Co. Ltd. were analyzed. Considering steelmaking process conditions, the optimum power-input diagrams were investigated, which can save energy, lower consumption, and raise productivity. This has been verified by production contrast tests. Application of the optimum curve in 50 t UHP-EAF indicates that research method is correct, the 50 t UHP-EAF runs smoothly with lowering electrical energy by 29.35 kW.h/t and shortening power on time by 3 rain. The general steps of making optimum power-input specification is also given.     

新型滑块在天钢带钢厂加热炉上的应用

针对原来加热炉水梁滑块结构、排列不合理造成的钢坯温度不均现象，改用新型孔洞式全热滑块。实践证明新型滑块设计合理、结构简单、施工方便、使用可靠，有效地提高了加热炉的热效率，减少了水梁黑印，改善了钢加热质量，明显的提高了带钢产量。     

新型旋流风冷冷渣器

在研究国内外已有循环流化床锅炉冷渣器的基础上,提出新型冷渣器结构模型,通过冷渣器内部的流动传热分析及模拟计算表明,新型冷渣器具有结构简单、传热和体积效率高、气固比小的特点,可很好地满足循环流化床锅炉的应用要求。     

证明推广的卡诺定理的另一种方法

本文提出了对于推广的卡诺定理的另一种较严密的证明方法,此种证明方法更易于为学生接受,其物理含义更为明确。     

基于小波分析的听觉滤波器组模型

对听觉滤波器组模型进行了研究。比较分析了伽马通(Gammatone)听觉滤波器组模型和基于小波分析的高斯小波听觉滤波器组模型,分别给出了预测听阈曲线并且与标准听闻曲线进行了比较,结果表明高斯小波听觉滤波器组模型更接近实际人耳滤波效果。将高斯小波听觉滤波器组模型的预测特征响度与德国朗德(Head Acoustics)公司的Artemis软件计算出的特征响度进行分析比较,结果表明,每个特征频带的响度差值都小于0.6 sone。     

用于空气净化的电除尘理论分析

论述了电除尘器用于工业除尘与空气净化时的差异,分析了电除尘器效率公式以及有效驱进速度等要点,讨论了电除尘器设计中的类比方法。     

A preliminary study on total removal efficiency of organic pollutants in sewage by Harbin municipal sewage treatment plant

To evaluate the removal efficiency of organic pollutants in the sewage by Harbin municipal sewage treatment plant,the influent and effluent samples from the plant were pretreated by liquid-liquid extraction (LLE) under conditions of acidity,neutrality and alkalescence in sequence,and then were analyzed by gas chromatograph-mass spectrum (GC-MS) procedures.Results indicate that there are 70 species of organic pollutants in the influent sample of the plant,which mainly consist of alkyls,benzene series,esters,and heterocyclic compounds.Some of these organic pollutants are biotoxic and belong to persistent organic pollutants (POPs).Four species among them are on the list of Prior Pollutants of Environmental Protection Agency of USA (USEPA).However,7 species of organic pollutants appearing in the effluent sample mainly include alkyls of multi-carbons and phthalate esters.The removal efficiency of phthalates is poor because of their poor biodegradability.The sewage treatment technique is effective in removing most of organics pollutants.