首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 671 毫秒
1.
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。  相似文献   

2.
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。  相似文献   

3.
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  相似文献   

4.
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。  相似文献   

5.
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.  相似文献   

6.
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…  相似文献   

7.
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...  相似文献   

8.
《深冷技术》2011,(3):31-31
<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  相似文献   

9.
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。  相似文献   

10.
后记     
《膜科学与技术》2005,25(B09):81-81
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.  相似文献   

11.
Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.  相似文献   

12.
In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.  相似文献   

13.
Quality Study of Honeycomb Core Shaping Without Wax Stabilization   总被引:1,自引:0,他引:1  
Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.  相似文献   

14.
Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.  相似文献   

15.
In continuous hot-dip galvanization process the corrosion and chemical stability of the sink roll in the galvanizing bath are important problem which effects on the quality and productivity. In order to protect the sink roll the carbide cermet and/or ceramic coatings were deposited on the surface of the sink roll. The WC-, Cr3 C2-cermet coatings were deposited by high velocity oxygen fuel (HVOF) spray, respectively. The coating samples were immersed in molten Zn-alloy containing 50 wt % aluminum at 833 K for 24 hr and 144 hr, respectively. The inter-diffusion and inter-reaction of Zn, Al and elements in coating and corrosion behaviors of these coatings were investigated by XRD, SEM and EPMA etc. The corrosion mechanisms of the carbide cermet coatings and ceramic coatings in molten High Al-Zn-alloy were approached.  相似文献   

16.
In many situations, ice often adheres to a cooling solid surface, frequently causing serious accidents. It is critical to clarify the mechanism of ice adhesion to the cooling surface in order to prevent ice adhesion. In a past study, the shearing stresses of two kinds of test plates with a copper surface having the higher thermal conductivity were measured. The shearing stress corresponds to ice adhesion force. Both shearing stresses were significantly different; however, the cause remains unclear.Therefore, the present study focuses on an oxide layer as the main factor causing the difference of both shearing stresses; the influence of the oxide layer formed on shearing stress was discussed. And in the removal and reformation processes of the oxide layer, the time variation of the shearing stress was clarified. Moreover, the relationship between the state of the copper surface and the shearing stress was also clarified by surface analysis.  相似文献   

17.
正When you are enjoying the green,energy-saving and healthy lighting of IKEA LED luminaire,you may not realize that most of IKEA’s LED bulbs are produced by the LED luminaire smart manufacturing system of Hangzhou Zhongwei Photoelectricity CO.,LTD(ZVISION).No longer enclosed in the laboratory,the product standards are brought into the factory workshop and even to the entire production process.Thus,the standards are promoted and applied in a favorable way by enterprises,benefitting consumers with high quality products.  相似文献   

18.
正The international standard,ISO 8124-6,Safety of toys–Part 6:Certain phthalate esters in toys and children’s products,was officially issued by ISO worldwide on August 15.It was the first time for Chinese experts to lead the ISO standard development in toys industry.The standard was drafted by a group of Chinese experts from SAC/TC for toys and relevant Chinese departments and finally completed by a dedicated international group of experts.ISO 8124-6 makes a substantive breakthrough in the aspects of the scope of toys,limitation of plasticizer types,control of test cost,accuracy of test,operation convenience,etc.,offering the operational guidance for toy manufactures and testing laboratories.  相似文献   

19.
正Themed on"quality,innovation,development",the first China Quality Conference(Beijing)was held in the Great Hall of the People on September 15.Chinese Premier Li Keqiang delivered an important speech at the conference.State Councilor Yang Jing and Wang Yong attended the conference with over 600 domestic and international representatives from foreign,regional and international quality organizations  相似文献   

20.
正The National Working Meeting on Land and Resources Standardization was held in Beijing on July 15,2014.Wang Min,the Deputy-Minister of the Ministry of Land and Resources,and Yin Minghan,the Chief-Engineer of SAC addressed the meeting.Representatives from relevant competent departments and technical committees were present.The meeting aims to summarize work,discuss existing problems and make clear working thoughts,promoting standardization work of land and resources to a new level.Wang Min pointed out that the standardization work of land and resources should be centered on the basic principles of"protecting land and resources dutifully,intensively and economically utilizing land and resources,and making all-out efforts to safeguard the public’s rights and interests",highlighted the  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号