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讨论了火电厂多种烟气脱硫技术装置的腐蚀处理,工艺环境对腐蚀的影响及其防腐蚀对策,分析我国引进及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,并着重论述了鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
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火电厂烟气脱硫装置腐蚀与防护 总被引:12,自引:2,他引:10
讨论火电厂多种烟气脱硫技术装置的腐蚀机理,工艺环境对腐蚀的影响及其防腐蚀对策。分析我国引起及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,关着重讨论鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
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讨论火电厂多种烟气脱硫技术装置的腐蚀机理,工艺环境对腐蚀的影响及其防腐蚀对策。分析我国引进及开发的烟气脱硫装置防腐蚀技术现状,比较了多种防腐蚀材料及技术的优劣特点,并着重论述了鳞片衬里技术在烟气脱硫环境中的耐蚀机理及特性。 相似文献
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废玻璃钢粉填充丁腈橡胶的性能研究 总被引:1,自引:0,他引:1
叶林忠 《再生资源与循环经济》2009,2(11):39-41
研究了废玻璃钢粉填充丁腈橡胶的性能。从取向和非取向两个方面探讨了废玻璃铜粉含量对丁腈橡胶性能的影响,比较了废玻璃铜粉和碳酸钙对丁腈橡胶性能的影响。结果表明,玻璃钢粉对于丁腈橡胶具有一定的补强作用,随着玻璃钢粉加入量的增加,电阻率略有下降;由于玻璃短纤维的存在使得胶片取向与非取向方向的性能有所差异。综合性能考虑,使用20份废玻璃钢粉的复合材料具有较高的性能价格比。 相似文献
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烟气脱硫系统的腐蚀与防腐 总被引:2,自引:0,他引:2
介绍了燃煤电厂烟气脱硫系统腐蚀的主要部位,产生腐蚀的原因及主要的防腐措施,防腐措施包括:用合金材料、玻璃纤维及增强热固性树脂材料制造设备;用橡胶、陶瓷等材料作衬里;控制烟气温度在露点以上等。 相似文献
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介绍了目前国内外热固性玻璃钢废弃物的回收利用方法,着重论述了化学热解回收法和物理粉碎回收法,对不同方法的回收料用于BMC和SMC的产品的性能进行了对比,分析了我国在玻璃钢回收方面的主要问题和发展方向. 相似文献
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张浩 《再生资源与循环经济》2020,(2):38-40
我国风电行业每年产生大量热固性玻璃钢废弃物,这些废弃的热固性复合材料叶片、机舱罩等,在处置过程中广泛存在资源浪费和环境污染问题。对风电行业废玻璃钢的来源、产生量进行分析,概述废玻璃钢的生态毒性,阐述当前玻璃钢废弃物资源化处置技术及其优缺点,并提出风电行业废玻璃钢资源化处置技术的未来发展方向。 相似文献
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Sustainable Bio-Composites from Renewable Resources: Opportunities and Challenges in the Green Materials World 总被引:28,自引:0,他引:28
Sustainability, industrial ecology, eco-efficiency, and green chemistry are guiding the development of the next generation of materials, products, and processes. Biodegradable plastics and bio-based polymer products based on annually renewable agricultural and biomass feedstock can form the basis for a portfolio of sustainable, eco-efficient products that can compete and capture markets currently dominated by products based exclusively on petroleum feedstock. Natural/Biofiber composites (Bio-Composites) are emerging as a viable alternative to glass fiber reinforced composites especially in automotive and building product applications. The combination of biofibers such as kenaf, hemp, flax, jute, henequen, pineapple leaf fiber, and sisal with polymer matrices from both nonrenewable and renewable resources to produce composite materials that are competitive with synthetic composites requires special attention, i.e., biofiber–matrix interface and novel processing. Natural fiber–reinforced polypropylene composites have attained commercial attraction in automotive industries. Natural fiber—polypropylene or natural fiber—polyester composites are not sufficiently eco-friendly because of the petroleum-based source and the nonbiodegradable nature of the polymer matrix. Using natural fibers with polymers based on renewable resources will allow many environmental issues to be solved. By embedding biofibers with renewable resource–based biopolymers such as cellulosic plastics; polylactides; starch plastics; polyhydroxyalkanoates (bacterial polyesters); and soy-based plastics, the so-called green bio-composites are continuously being developed. 相似文献
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Shouhai Li Chunpeng Wang Xiaowei Zhuang Yong Hu Fuxiang Chu 《Journal of Polymers and the Environment》2011,19(1):301-311
Renewable resource-based composites were prepared with acorn powder and Thermoplastic resin poly(lactic acid) (PLA) by twin-screw
extrusion followed by injection molding processing or hot-compression molding processing. The study of the composites microstructure
showed poor adhesion between acorn powder and PLA matrix. The hygroscopicity, mechanical properties and melt flow property
of composites were promising even though the composites had a 70 wt% content of acorn powder. Silane coupling agent, 4,4′-Methylenebis
(phenyl isocyanate) and PLA grafted with maleic anhydride did not show obvious effect on mechanical properties of composites.
The impact resistance strength of reinforced composites with steel fiber webs were improved greatly in comparison with those
having no steel fiber webs. Thermal properties results of DSC and DMA showed that the presence of acorn powder significantly
affected the crystallinity, crystallization temperature (Tc), glass transition temperature (Tg) and melting temperature (Tm) of PLA matrix. The study results proved that composites had superior mechanical properties, enough to partially replace
the conventional thermoplastic plastics. 相似文献
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Ayou Hao Haifeng Zhao Wei Jiang Lin Yuan Jonathan Y. Chen 《Journal of Polymers and the Environment》2012,20(4):959-966
With an industrial trend of going green, the use of natural fibers in polymer composites is growing rapidly, especially in the automotive industry. The objectives of this research are to investigate mechanical performance of kenaf/polypropylene nonwoven composites (KPNCs) in production of automotive interior parts, and to develop preliminary linear models for quantifying elastic range of the KPNCs under various loading conditions. Using polypropylene (PP) fiber as bonding fiber, the KPNCs were fabricated with 50/50 blend ratio by weight. Unlike the manufacturing method of fiber reinforced plastics, all KPNCs were produced by carding and needle-punching techniques and thermally bonded by a panel press with 3-mm thickness gauge. Mechanical properties of the KPNCs in terms of uniaxial tensile, open-hole tensile, tensile at different strain rates, flexural, and in-plane shear were measured instrumentally. It was found that sample which was processed at higher temperature (230?°C) but shorter time (60?s) had the best mechanical performance. KPNCs were relatively insensitive to the notch but sensitive to strain rates. The linear elastic finite element model of KPNCs agreed well with the experimental results in the valid strain range of 0?C0.5?% for uniaxial tensile test and 0?C1?% for flexural test. 相似文献
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C. Wretfors S.-W. Cho M. S. Hedenqvist S. Marttila S. Nimmermark E. Johansson 《Journal of Polymers and the Environment》2009,17(4):259-266
The next generation of manufactured products must be sustainable and industrially eco-efficient, making materials derived
from plants an alternative of particular interest. Wheat gluten (WG) is an interesting plant material to be used for production
of plastic similar materials due to its film-forming properties. For usage of plastics in a wider range of applications, composite
materials with improved mechanical properties are demanded. The present study investigates the possibilities of reinforcing
WG plastics with hemp fibers. Samples were manufactured using compression molding (130 °C, 1600 bar, 5 min). Variation in
fiber length, content (5, 10, 15 and 20 wt%) and quality (poor, standard, good) were evaluated. Mechanical properties and
structure of materials were examined using tensile testing, light and scanning electron microscopy. Hemp fiber reinforcement
of gluten plastics significantly influenced the mechanical properties of the material. Short hemp fibers processed in a high
speed grinder were more homogenously spread in the material than long unprocessed fibers. Fiber content in the material showed
a significant positive correlation with tensile strength and Young’s modulus, and a negative correlation with fracture strain
and strain at maximum stress. Quality of the hemp fibers did not play any significant role for tensile strength and strain,
but the Young’s modulus was significantly and positively correlated with hemp fiber quality. Despite the use of short hemp
fibers, the reinforced gluten material still showed uneven mechanical properties within the material, a result from clustering
of the fibers and too poor bonding between fibers and gluten material. Both these problems have to be resolved before reinforcement
of gluten plastics by industrial hemp fibers is applicable on an industrial scale. 相似文献
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Journal of Material Cycles and Waste Management - Recycling possibilities were evaluated for a composite waste composed of glass fiber reinforced polyester bound to a layer of crosslinked... 相似文献
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Akio Kamimura Yugo Akinari Takeru Watanabe Kazuo Yamada Fumiaki Tomonaga 《Journal of Material Cycles and Waste Management》2010,12(2):93-97
We have achieved major improvements in the efficient chemical recycling of waste fiber-reinforced plastics (FRPs). The effects
of reduction in the amounts of dimethylaminopyridine (DMAP) used for depolymerization were examined. The treatment of waste
FRP in the presence of 1 or 2 wt% DMAP resulted in the successful recovery of monomeric materials that could be employed in
the polymerization process to produce recycled plastic. The separation of linker units from glass fiber, however, was unsuccessful.
The purity of the recovered monomeric material, when treated with activated charcoal, was improved to about 70%. This resulted
in effective decoloration of the recovered monomer. Finally, the purified material, after undergoing repolymerization, provided
high-quality recycled plastic comparable to new plastics produced from new monomers. 相似文献
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《Waste management & research》1989,7(2):103-114
Data for the composition of municipal solid waste (MSW) from around the world are used to further examine a previously reported statistical correlation between the fraction of food residues and the fractions of paper and board, metal, glass and plastics residues in MSW. For data from many locations, these correlations are statistically significant; multiple linear regressions are computed. The fraction of food waste decreases as the fractions of waste from paper and board, metals and glass increase.The situation in the U.S.A. is examined further for just packaging waste. Similar correlations are established for the fraction of food residues and the fractions of paper and board and plastics packaging residues for predicted compositions for 1980 to 2000. Similar correlations for the U.K. are not statistically significant. Some reasons for this are postulated.The results of the statistical analyses predict that a strategy for decreasing the fraction of food waste in MSW is to increase the use of food packaging by some amount, especially plastics and metals, contrary to conventional wisdom. 相似文献
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The recycling of waste plastics is important for the prevention of the exhaustion of fossil resources. In this paper, recycling techniques of carbon fiber-reinforced plastic (CFRP) using supercritical and subcritical fluids were reviewed. The matrix resin of CFRP such as epoxy resin or resol resin was decomposed by supercritical and subcritical fluids, and the carbon fiber without thermal damage was recovered from CFRP. Mainly, water or alcohol was used as decomposition medium. 相似文献
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以废弃的阴极射线管锥玻璃碱性浸出渣及屏玻璃混合粉末为原料烧制泡沫玻璃。考察了发泡温度、屏玻璃加入量、发泡剂种类、发泡剂加入量、稳泡剂添加量对所制备的泡沫玻璃密度及抗压强度的影响。实验结果表明:在发泡温度800 ℃、屏玻璃加入量50%(w)、稳泡剂硼酸加入量5%(以锥玻璃碱性浸出渣及屏玻璃粉末总质量为基准,下同)、发泡剂SiC加入量15%最佳条件下烧制的泡沫玻璃密度达417 kg/m3,抗压强度达1.09 MPa,可满足建筑用泡沫玻璃的Ⅳ型物理性能指标。本实验烧制的泡沫玻璃的Pb浸出量为1.27 mg/L,Ba浸出量为0.06 mg/L,均满足固体废物的浸出毒性标准。 相似文献