冶金污泥脱水用DYD1250—N带式压榨过滤机的试验研究

钢铁生产过程中会产生大量的污水,如烧结污水、高炉煤气洗涤污水及转炉除尘污水等,为了防止环境污染并回收其中的有用物质,必须进行污泥脱水。目前国内钢铁工业的污泥一般采用真空过滤机处理,但功耗高、噪     

高炉洗涤塔计算机监控系统

高炉洗涤塔计算机监控系统鞍山钢铁公司计量厂（１１４０００）徐京京洗涤塔是高炉的大型配套设备，它主要是处理高炉煤气。它的工作过程中许多状态要求有严格的监视，而且它的煤气输出直接送入煤气管网，对煤气管网的工作状况、使用高炉煤气的煤气混合站、使用高炉煤气的...     

磁力金属带传动的原理与设计

在系统融合传动机械学和电磁学理论的基础上，提出了一种新型的磁力传动机械－－磁力金属带传动（MMBT）。分析了其工作原理和设计方法，对其有效牵引力、传动比及弹性滑动率等进行了数值模拟，并进行了试验验证。结果表明，同普通带传动相比，MMBT具有传动功率大、弹性滑动小、传动准确、效率高等特点，具有推广应用前景。     

NZS-6中心传动浓缩机改造

介绍了中心传动浓缩机的原理、技术参数，针对其存在的问题做了改动，并取得了效果。     

磁力金属带传动设计中几个常用系数的确定

磁力金属带传动是一种新型传动，具有传动功率大、传动比大、线速度高等特点，其设计过程中须用到包角系数、传动比系数及弯曲影响系数等。本文对这些常用系数进行了分析计算，并确定了其取值规律，从而可为磁力金属带传动的设计提供理论依据。     

ZG—G、BG型系列刮泥机

ZG—G、BG型系列刮泥机广泛适用于水处理工程中圆形、正方形及大池径的初次沉淀池、调节池、污泥浓缩池等给水排污工程设施。该机设计合理、结构紧凑,具有动力消耗低、传动平稳、刮泥效果好、运行安全、操作方便等特点,是污水处理工程中一种理想的刮     

有限转角范围内的钢带传动设计

现代机械,尤其是军警用产品对传动的要求越来越高,钢带传动由于传动能力强、精度高及经济性好而在多种传动方式中脱颖而出。钢带传动是挠性传动的一种方式,一般用于平行轴间的传动,在高速、大轴距、大力矩、高精度的空间机构、精密机械中应用。结合钢带的制造、联接及张紧等多方面因素,在精密机械手、精确取送装置、生产线、军警用制导系统的传动系统等有限角往复传动副中,钢带传动应具有更强的优势。     

摆动活齿传动齿形误差分析

摆动活齿传动齿形误差分析燕山大学安子军，曲继方活齿传动是传递同轴间运动的新型机械传动，其结构紧凑、传动比大、承载能力和传动效率高等特点越来越引起重视，并开始应用。本文根据误差理论分析了摆动活齿传动的关键结构参数及其误差对齿形的影响，为该传动的设计和开...     

改进遗传算法优化的BP神经网络高炉煤气预测

以高炉煤气为主要研究对象,针对钢铁企业高炉煤气发生量波动大、无规律等特点,提出基于改进遗传算法优化的BP神经网络模型,通过改进遗传算法中交叉概率和变异概率的自适应选取,达到在全局与局部同时具有较强的寻优能力.由仿真结果可知:改进遗传算法优化的BP模型比普通的BP神经网络模型能更精确地预测煤气发生量,并解决了遗传算法(G...     

基于复合传动的微创机器人手术器械设计与研究

随着微创机器人的广泛应用,其配备的手术器械也成了研究热点。丝传动因有远程交错传动、小型化和传动平稳的特点常用于微创手术器械的研制中,但有变传动比和摩擦损失的问题。因此,基于复合传动理论引入能传递交错轴运动且有定传动比和传动平顺等特点的面齿轮,将丝传动与齿轮传动进行组合配置,进行微创机器人手术器械的研制。通过结构设计、运动学和工作空间分析以及样机的运动实验,验证了器械复合传动的合理性。     

Water-based hydraulic fluids containing synthetic components

This paper explains the nature offire-resistant, water-based hydraulic fluids, and their applications, and gives comparisons with mineral oil-based hydraulic fluids. The content of the different types of fluid is described, and the technical requirements for water-based hydraulic fluids discussed. The chemistry of the synthetic thickeners of water, their thickening effect and shear stability, as well as their technical properties, are explained and compared. The construction and the mode of action of thickeners for hydraulic fire-resistant fluids (HFAS) or viscous high-water-based fluids (VHWBF) are detailed, and the physical chemistry of these hydrophilic-hydrophobic thickeners, which form microemulsions in water, is considered in interaction with emulsifying agents. In this case laser-light scattering correlation spectroscopy is shown to be helpful.     

高压给水空排止回阀特性分析

在讨论宝钢N2 炼钢煤气冷却高压给水系统控制过程的基础上 ,通过空排止回阀系统动态特性试验研究 ,并根据企业节能技术改造实践和现场长期运行使用情况 ,分析了空排止回阀系统的开发应用前景及其社会经济效益     

钢丝绳脂组成对抗水性能的影响

应用润滑脂抗水喷雾性测定方法,研究基础油黏度、主稠化剂及辅助稠化剂、黏附剂添加量对钢丝绳脂抗水性能的影响。结果表明:随着基础油黏度的增加,钢丝绳脂的抗水性能有明显改善,尤其是黏度为25~56 mm2/s时改善效果最显著;聚丙烯类主稠化剂在改善钢丝绳脂的抗水性能方面优于聚乙烯类;随着辅助稠化剂微晶蜡添加量的增加,钢丝绳脂抗水性能提高,但微晶蜡质量分数大于4%抗水性能改善效果趋于平缓;随着黏附剂聚异丁烯(PIB)、烯烃共聚物(OCP)添加量的增加,钢丝绳脂抗水性能提高,但黏附剂质量分数大于5%时会导致抗水性能变差;聚异丁烯(PIB)对钢丝绳脂抗水性能的改善优于烯烃共聚物(OCP)。     

Study on Sludge Formation during the Oxidation Process of Turbine Oils

Against the backdrop of increased needs for longer operating life of turbine oils, there is a tendency to use amine-type antioxidants for steam turbine oils as well as gas turbine oils. Amine-type antioxidants are known to form sludge during the oxidation process, and the sludge formation from turbine oils involves the high risk for a power plant of bearing temperature rise caused by sludge deposition onto the bearing surface. But currently, there is no global specification to evaluate the sludge formation from turbine oils that have high rotating bomb oxidation test (RBOT) life. In this study, we examined 18 kinds of commercially produced turbine oils and two kinds of originally prepared oils with amine additives on sludge formation under 120°C dry turbine oil oxidation stability test (TOST) accelerated degradation test. Consequently, we found a criterion to check the quality of sludge resistance of turbine oils based on the relationship between the RBOT residual ratio and weight of filter residues(1μ m pore filter).     

聚脲润滑脂稠化剂结构与其性能的关系

以脂肪胺、芳香胺、脂环胺的不同组合和异氰酸酯为稠化剂,在不同的工艺条件下制备一系列的聚脲润滑脂;利用扫描电子显微镜(SEM)对润滑脂皂纤维微观结构进行表征;探讨不同的稠化剂组成、不同制备工艺对聚脲润滑脂的微观结构和性能的影响。结果表明:单纯均匀颗粒状稠化剂比纤维与颗粒状复合的稠化剂所制备的聚脲脂具有更优的性能;纤维结构以单根形式存在为主的聚脲润滑脂性能优于纤维结构为多根纤维聚集为一股,各股之间交织的聚脲润滑脂。     

城镇污水污泥处理过程中絮凝剂的选用

在污水处理过程中,会产生大量的污泥。污泥的含水率高达95％-99％,导致污泥有巨大的容积,给污泥的后续处理带来很大的困难。通过介绍目前常用的污泥脱水絮凝剂的种类及其脱水特点,并就污泥脱水效果的指标进行了讨论。有机高分子污泥脱水絮凝剂对污泥进行调理操作简单、效果好,是比较常用的方法,能提高污泥的脱水性能,在随后的机械脱水中更好的脱水。根据实际运行经验,对不同的浓缩脱水设备给出了合适的絮凝剂种类。     

高温润滑脂的发展现状

随着现代机械设备向小型化、高速度、高负荷方向发展,对润滑脂的高温性能和抗氧化安定性提出了越来越高的要求。本文从润滑脂的基础油和稠化剂两方面介绍了高温润滑脂的发展现状,同时对高温润滑脂的前景作了展望。     

Pyrolysis and gasification characterization of sewage sludge for high quality gas and char production

A study on pyrolysis, steam gasification, and carbonization-activation was conducted to produce energy and resource from waste sewage sludge. Carbonization-activation is a sequential process of pyrolysis and steam gasification. The experiment was conducted with a batch-type fixed bed reactor. A comparative analysis on the formation characteristics of products, such as gas, tar, and char, was conducted to evaluate the three cases. For sludge char, carbonization-activation showed the largest amount of porosity in the char, and its specific surface area was 80.28 m²/g with an average pore diameter of 6.229 nm. The best adsorption ability of benzene, a light tar, was 175 mg/g. For the producer gas, steam gasification obtained the largest amount of 20.1 L. Similarly, carbonization-activation showed a large value of 16.6 L. Hydrogen and carbon monoxide concentrations were higher in the producer gas due to steam reforming compared with carbonization-activation. Energy yields were 209 kJ and 226 kJ for steam gasification and carbonization-activation, respectively. The amount of tar formation did not show a significant difference, but the largest one was found in steam gasification. The gravimetric tar amount for steam gasification was 23.5 g/Nm³. However, the selected light tar displayed the lowest concentration for the carbonization-activation. Such concentrations were 2.79 g/Nm³, 0.75 g/Nm³, 0.14 g/Nm³, and 0.14 g/Nm³ for benzene, naphthalene, anthracene, and pyrene, respectively. Therefore, carbonization-activation was found to be the most effective process for producing high quality sludge char and producer gas for utilizing waste sludge into renewable energy and resources.     

JYX高浓度黏稠物料加压旋转流变仪的研制

鉴于高浓度黏稠物料(如原生煤泥、城市污泥、造纸污泥等一类工业副产品或固体废弃物)若无添加剂作用在常压下是一种分散结团物质，流变参数测定过程中常出现被测介质“打滑”和容易“离析”等问题，研制出一种加压旋转流变仪(压力最高可达30MPa)，测量时将物料封闭加压，从而达到此类介质加压测量流变特性的目的。     

The Friction Reducing Properties of Molybdenum Dialkyldithiocarbamate Additives: Part I — Factors Influencing Friction Reduction

Abstract

Calcium sulfonate complex greases have excellent extreme pressure, antiwear, and anticorrosion properties and are widely applied in rolling bearings, particularly in humid environments. In this article, the shear stability of dry and water-contaminated lubricating calcium sulfonate complex greases is described using a novel aging method. Unlike lithium and polyurea greases, no shear softening is observed for the dry greases due to the good mechanical stability of the particle-like thickener structure. For water-contaminated greases, no water separation was found during the prolonged aging. Instead, a homogeneous water–calcium sulfonate thickener micellar structure is generated. These micelles function as apparent thickeners and effectively increase the thickener concentration, which thickens the grease. This may explain why calcium sulfonate complex grease has excellent water absorption properties.