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1.
碳纤维在生产过程中会产生难生化处理的高浓度有机废水,特别是丙烯腈对微生物有毒害作用,若不进行预处理,生化处理就很难进行。大量生产废水的有效处理成为目前碳纤维行业发展的瓶颈之一。目前,工业中常用的预处理方法有中和、化学混凝沉淀、气浮等,但处理效果很不理想。若单纯加强氧化剂进行化学氧化,处理效果也不明显,且大量氧化剂的使用增加了运营成本。  相似文献   

2.
塑料包装废弃物的回收处理途径   总被引:9,自引:3,他引:6  
塑料包装废弃物严重污染环境,对其进行回收处理应尽量减少污染。塑料包装废弃物的回收处理途径主要包括填埋、能量回收型焚烧、再生处理、降解和其它回收途径,对这些回收处理途径进行了分析。  相似文献   

3.
当前,化学检测样品前处理技术发展快速,通过不断研究与开发,其新技术发展及应用广泛,本文分析了当前化学检测样品前处理技术的发展现状,将常用的固体样品前处理技术与液体样品前处理技术进行对比、分析,针对几种常用的样品前处理技术及其研究进展进行深入分析,具有一定的借鉴价值。  相似文献   

4.
塑料包装材料表面的电晕处理与火焰处理   总被引:1,自引:1,他引:0  
分析塑料包装材料印刷、粘接困难的原因,介绍了两种表面处理改性方法,即电晕处理和火焰处理,并对这两种处理效果的影响因素进行了讨论,提出了提高表面处理改性质量的主要因素。  相似文献   

5.
采用氢氟酸对AZ61镁合金进行钝化处理,对钝化处理得到的转化膜的物相、厚度、耐蚀性进行测定,着重对微观组织及可镀性进行了分析。结果表明,氢氟酸处理得到的氟化镁转化膜对镁合金基体有较好的保护作用,在氟化镁钝化膜上电镀铝是可行的。  相似文献   

6.
原振鑫 《安装》2023,(12):35-37
本文对110k V GIS组合电器安装流程和关键技术进行总结和分析,并针对最常见的SF6气体泄漏故障问题,从处理O型密封圈、处理法兰密封面、法兰对接和SF6气体处理四个现场安装操作进行处理,取得了较好地控制效果,可为类似安装工程提供借鉴参考。  相似文献   

7.
提出一种组合式空气处理系统,在结构上采用复叠形式。该系统能够按照不同运行模式实现对空气的降温、除湿、加热和加湿处理。对两级冷冻除湿过程进行分析,并对系统流程和结构进行改进。与传统空气处理方式相比,组合式空气处理系统一方面避免分别购置空气处理设备,另一方面扩大系统工作的环境温度范围和空气的热湿处理范围。  相似文献   

8.
罗炜 《中国科技博览》2012,(34):374-374
本文从煤层气钻井施工的实际出发,对在煤层气钻井施工中比较常见的钻井事故,依据生产实践、从勘探技术处理方法上进行了分析,并就事故的发生及处理方法进行了阐述,为井内事故的处理提供了借鉴。  相似文献   

9.
就甘油对人红细胞冷冻干燥保存效果的影响进行了实验研究。实验中先用不同浓度的甘油对红细胞进行处理,用PVP、柠檬酸钠、蔗糖和胎牛血清作为冻干保护剂对红细胞进行冻干保存,冻干后的样品用质量浓度为30g/L的NaCl复水,用血球分析仪和光镜进行检测。实验结果表明;用甘油进行处理后,红细胞的回收率明显高于没有用甘油处理的红细胞组。其中,采用质量浓度为400g/L的甘油处理后,红细胞冻干回收率达到51.4%。  相似文献   

10.
铁基形状记忆合金具有价格低、易加工、不必进行低温变形处理和低温储藏等优点,通过热机械循环处理等方法来有效地提高其回复率,但是耐酸、盐腐蚀性能较差。对铁基形状记忆合金进行化学镀镍表面处理后,在基本保持铁基形状记忆合金优点的同时,大幅度提高了耐酸、盐腐蚀能力,从而拓宽了铁基形状记忆合金的应用范围。  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.
During his inspection in Henan Province in May, Chinese President Xi Jinping stressed to "push forward the transformation from China Speed to China Quality, from Made in China to Created in China, and from Chinese Products to Chinese Brand". The "Three Transformations" are the specific requirements and goal of China's national development in the context that market should play a decisive role in the allocation of resources.  相似文献   

18.
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   

19.
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   

20.
正SAC Administrator Tian Shihong led the Chinese delegation to visit the Spanish Association for Standardization and Certification(AENOR)on September 15,2014.Mrs.Begona Cristeto,the Vice-Minister of Industry,Energy and Tourism of Spain,and Mr.Avelino Brito,the President and CEO of AENOR greeted the delegation.The two sides had a deep and friendly discussion on strengthening the cooperation between China and Spain in the standardization field and promoting the standardization work to support the development of economy and trade in the two countries.  相似文献   

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