膜分离技术在电镀废水中的应用——膜技术是电镀废水深度处理回用的发展方向

膜分离技术是一种高效、低能耗和易操作的液体分离技术,同传统的水处理方法相比,其能够实现电镀废水的循环利用和对有用物质的回收。本文主要介绍了膜分离技术处理工艺在电镀废水中的应用,指出膜技术是电镀废水深度处理回用的发展方向。     

膜分离技术在石油化工领域中的应用

通过分析气体膜分离、渗透汽化膜分离和膜生物反应器等膜技术在石化领域中的应用 ,提出应开发高性能的膜材料和膜、膜装置及过程优化 ,以及膜分离与其他分离技术耦合的必要性。     

膜技术在生物技术中的应用及其发展趋势

随着膜技术的不断开发和应用范围的逐渐扩大,膜技术在迅速发展的生物技术领域中的应用已取得不少令人振奋的成果。现代的生物技术需要在细胞培养、蛋白质分禽、生物液体提纯和浓缩、无菌操作及其他生物化学方面采用与之匹配的高技术,以代替传统的过滤、结晶、离心、吸附、冷冻、蒸发和蒸馏等分离、精制和浓缩方法。正处兴旺发展和不断改进、完善的膜技术,特别是膜分离技术,因其设备结构简单,操作步骤简化,质量的迁移中无相变,是生物技术中的最佳选择方法。生物技术中引入膜技术以后,改     

全国轻工业膜分离技术应用研讨会将在青岛召开

为推动膜分离技术在轻工业领域的广泛应用，更好地以膜技术解决轻工业生产中的分离、浓缩、净化、除菌、保鲜等问题，用高新技术改造传统轻工业，加快支柱产业结构调整的步伐；为加快企业技术创新，节约能源、保护环境、提高企业整体效益，由中国膜工业协会和山东省一轻总会共同主办的“全国轻工业膜分离技术应用研讨会”将于１９９９年１０月在青岛召开．（１）会议主要内容围绕膜技术解决轻工业中果汁、饮料、饮用纯水、乳品、酒类、调味品、制糖、果蔬、酶制剂等的分离、净化、提纯、浓缩、保鲜、有用物质的回收和废水处理等议题，分别开…     

气体分离膜技术动向

气体分离膜技术动向膜分离技术以其无相变、省力节能和能提供紧凑的工艺而成为分离技术的重要手段。气体分离膜技术已应用于石化、化学、精密机械、食品等领域。高分子气体分离膜的开发包括膜材料和薄膜化技术的开发。高分子所具的物理特性决定了膜材料的特点，因此它的化...     

“第三届膜分离技术在冶金工业中应用研讨会”征文通知和第一轮会议通知

随着膜技术的不断发展,在冶金行业中的应用已涉及到采矿、选矿、冶炼、材料及加工等各专业领域。除在钢铁工业中应用外,膜技术的应用及试验研究已涉及到多种有色、稀有及放射性元素。应用的膜技术已覆盖DD、ED、EM、BP、EDI、RO、NF、UF、MF及MD与气体分离等多种膜分离技术领域。     

“第三届膜分离技术在冶金工业中应用研讨会”征文通知和第一轮会议通知

随着膜技术的不断发展,在冶金行业中的应用已涉及到采矿、选矿、冶炼、材料及加工等各专业领域．除在钢铁工业中应用外,膜技术的应用及试验研究已涉及到多种有色、稀有及放射性元素．应用的膜技术已覆盖DD、ED、EM、BP、EDI、RO、NF、UF、MF及MD与气体分离等多种膜分离技术领域．     

我国膜分离工业技术发展要点

<正>膜分离气体工业有关业内人士认为,我国膜分离气体工业科技发展主要有以下几个技术要点:(1)对在我国已工业化应用的膜技术,如微滤、超滤、反渗透和气体分离膜等,要加大开发力度,提高产品质量,形成规模效益。以解决膜材料和制膜技术为核心,突破复合反渗透膜的制备技术,使产品达到国际水平;进行行业     

后记

膜分离技术是近几十年来发展起来的一门多种学科交叉的新兴学科和高新技术．膜技术已广泛用于化工、石油化工、冶金、环保、食品饮料等许多领域，并成为21世纪最具有发展前景的六大新兴技术产业（信息电子、生物医药、环境保护、新材料、新能源和生态农业）．也是我国当前重点推动发展的20个战略性重点专项领域．     

膜分离技术在水处理中的应用现状及展望综述

膜技术是20世纪60年代后期迅速崛起的一种分离技术,在工业中有着广泛的应用。介绍膜分离技术的工作原理、特点和分类,阐述了膜分离技术在工业中,尤其是在水处理过程中的应用,并展望膜技术应用领域的发展趋势。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Synthesis of Alumina-Zirconia Nanocomposites by Solgel Process

Al₂O₃-ZrO₂ nanocomposites were developed starting with the solgel process. Composite alumina-zirconia nanopowders were synthesized from metallorganic precursors (Aluminium secondary butoxide and zirconium Iso propoxide) using the solgel process. The parameters affecting the synthesis—solvent, concentration of precursor, R/H ratio (i.e., dilution of water in solvent)—were varied as also the temperature and pH. BET and TEM were used to measure nanosize. Diffuse reflectance spectroscopy and also qualitative optical absorption led to identical particle size estimate. The variation of process parameters was used to study the effect and interdependence of process parameters. Artificial Neural Networks was used to rigorously analyze the process. Although this led to confirmation of interdependence of parameters, the presence of a single overwhelming solvent variable was also established. Then the optimal process was used to synthesize more nanopowder. To produce bulk nanocomposite the nanopowders were sintered by varying the temperature and time period. The sintered lithoids were probed with a vickers hardness tester to measure elastic modulus, hardness, and fracture toughness. The results showed high elastic modulus, modest hardness, and very high fracture toughness.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Friction Stir Processing Strategies for Uniform Distribution of Reinforcement in a Surface Composite

Friction stir processing (FSP) is an important technique for preparing surface composites. Fabricating defect-free surface composites with uniform particle distribution by FSP is a challenging task. In this study, silicon carbide particles reinforced AA5083 alloy surface composites was fabricated using different FSP strategies including variation in process parameters, dual-tool processing and tool offset overlapping. Material flow of the processed material with reinforcement particles demonstrated that the distribution of particles was influenced by the stirring action of the probe as well as the extrusion of the plasticized material due to the movement of the tool. Process parameters, particularly rotational speed, showed a dominant influence on the distribution of silicon carbide particles.