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本文围绕褐煤资源综合开发利用的问题进行了探讨;对褐煤煤质的特殊性进行了分析;对国内外褐煤提质加工技术进行了分类,简要说明了各类工艺的工作原理和技术特点;重点分析了国内外褐煤干燥热解技术的研究进展和工业应用情况,对工业化示范装置出现的问题进行了评价和总结;分析了制约褐煤发展的主要因素,并指出了未来产业发展的方向和重点. 相似文献
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<正>2010年1月16日—17日,公司召开了2010年度工作会议。会议认真回顾总结了2009年的主要工作,分析了当前的形势和机遇,部署了2010年的工作任务。会上,公司董事长蒋明作了重要讲话,总经理毛绍融作了行政工作报告,党委副书记陈百河作了党委工作报告,副总 相似文献
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文中详细介绍了几中丁二烯的生产工艺并进行了比较,总结出了它们的特点。对各地区丁二烯的生产能力以及消费状况进行了分析,并探究了丁二烯的新用途。 相似文献
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带式过滤机在多品种氢氧化铝生产中的应用 总被引:1,自引:0,他引:1
介绍了带式真空过滤机的工作原理及其在多品种氢氧化铝生产方面的应用情况,并对带式真空过滤机使用过程中存在的问题进行了改造。改造之后,提高了洗涤过滤效率,降低了滤饼水分,降低了能耗,提高了产量,确保了产品质量,取得了较好的经济效益。 相似文献
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《中国石油和化工标准与质量》2014,(2)
我国科学技术的不断发展,推动了我国GPS技术的不断进步,在我国多个领域获得了应用,实现了我国国民经济的快速、高效的增长。GPS在我国油田井位测量中的应用,大大提高了工作人员的工作效率,且保证了油田井位测量结果的准确性。本文先是对GPS全球定位系统进行了概述,又详细阐述了GPS技术在井位测量中的建立,后分析介绍了GPS全球定位系统的其它应用。 相似文献
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子午胎帘子布用涤纶弹力纬纱的研制 总被引:4,自引:0,他引:4
绍了子午胎帘子布用涤纶弹力纬纱的制造技术。在普通纺丝设备上,合理选择聚酯原料,确定最佳生产工艺,生产出具有特殊性能的聚酯长丝,经棉纱包覆制成涤纶弹力纬纱。该产品浸胶后延伸可达80%以上,适于子午胎用涤纶帘子布的制造及后加工。 相似文献
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玻纤表面处理对于玻纤增强PET复合材料断裂韧性的影响 总被引:7,自引:1,他引:6
本文以三组分别经脱蜡处理、涂层处理及未经任何处理的玻纤为增强纤维,PET为基体纤维,采用混纤纱浸渍技术,制备连续玻纤增强混纤纱复合材料单向板。通过对所制备材料力学性能的对比,研究了玻纤表面处理对玻纤增强PET复合材料断裂韧性的影响。 相似文献
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本文首先介绍了国内外涤纶帘子线(布)发展情况、主要生产厂家及规模、各种骨架材料应用范围及其性能比较及涤纶帘子线技术指标等。第二介绍了涤纶树脂增粘、纺丝制帘子线及其生产工艺流程。第三介绍了涤纶帘子布厂的建厂规模、单位产品的投资数及成本、涤纶工业丝产品单位成本的测算和比较、涤纶浸胶帘子布单位成本的测算和比较。第四介绍了各种化纤工业丝比价、涤纶工业丝和民用丝比价、涤纶工业丝与帘子布的比价及浸胶帘子布与轮胎比值、最低售价的测算等。最后提出核定价格的几个原则及其建议价格。 相似文献
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Development of high throughput production processes for making thermoplastic nanofiber and nanofiber yarns are urgently needed. PET, PTT, and PBT nanofibers were prepared from PET/CAB, PTT/CAB, PBT/CAB immiscible polymer blends by in situ microfibrillar formation during the melt extruding process. The diameter distribution and crystallization properties of PET, PTT, and PBT nanofibers were analyzed. After removing the CAB matrix phase, the nanofibers could be collected in the forms of random or aligned nanofibers and nanofiber bundles or yarns. To understand the formation mechanism of the nanofibers, the morphology development of three different polyesters in the dispersed phase were studied with samples collected at different zones in a twin‐screw extruder. The morphological development mechanism of the dispersed phases involved the formation of sheets, holes and network structures, then the size reduction and formation of nanofibers. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献
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A sample of high-elastic-textured poly(ethylene terephthalate) (PET) yarns were subjected to different conditions of heat-setting, i.e., different temperatures and overfeeds. The structural changes were characterized by different physical methods. The orientation factors of crystalline and amorphous regions were calculated. The yarn tensions acting during the SET process were measured and corrected to the structural data. The results obtained show that two processes take place during the SET process: relaxation of the molecule segments in amorphous regions and change of crystallite orientation in microfibrils. A simple model for explanation of the structural changes in simultaneously draw-textured PET yarns is proposed. 相似文献
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PET连续纺丝拉伸的二种不同工艺:高速纺丝—低倍率高速拉伸;低速纺丝—高倍率高速拉伸。所得到的纤维都是FDY。比较了这二种工艺产品的性能和结构。并与普通的POY—DT及UDY—DT路线产品进行了对比。发现用高速纺丝低倍拉伸方法制得的纤维性质更好一些。而低速纺的方法实施起来更方便。在二种连续纺丝拉伸工艺中由于消除了"不同停留时间"的影响,其产品的染色均匀性都比间断的方法来得好。 相似文献
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Haitao Niu Weimin Gao Tong Lin Xungai Wang Lingxue Kong 《Polymer Engineering and Science》2014,54(7):1495-1502
In this work, a spinning metal wire collector was employed to continuously collect polyacrylonitrile (PAN) nanofibers produced by a disc fiber generator and coil them around a polyethylene terephthalate (PET) yarn. The obtained composite yarns exhibited a core/shell structure (PET yarn/PAN nanofibers) with nanofibers orderly arranged on the surface of the PET yarn. The electric field analysis showed that the position of metal wire had insignificant effect on the formed electric field and high intensity electric field was formed at the disc circumferential area, which provided a constant electric field for the production of uniform nanofibers. The spinning solution, spinning speed of metal wire, and winding speed were found to play an important role in producing good quality nanofiber yarns, in terms of morphology, strength, and productivity. Pure nanofiber yarns were obtained after dissolving the core yarns in a proper solvent. This method has shown potential for the mass production of nanofiber yarns for industrial applications. POLYM. ENG. SCI., 54:1495–1502, 2014. © 2013 Society of Plastics Engineers 相似文献
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Insights into process–structure–property relationships of poly(ethylene terephthalate) industrial yarns by synchrotron radiation WAXD and SAXS 下载免费PDF全文
Yatao Liu Lixin Yin Huirong Zhao Guangkun Song Fangming Tang Lili Wang Huili Shao Yaopeng Zhang 《应用聚合物科学杂志》2015,132(36)
Synchrotron radiation wide angle X‐ray diffraction (WAXD) and small angle X‐ray scattering (SAXS) were performed to study the structures of four typical types of poly(ethylene terephthalate) (PET) industrial yarns. Three‐dimensional structural models of the yarns and comprehensive insights into the process–structure–property relationships were gained. High spinning speed, low draw ratio, and high heat‐setting temperatures lead to HMLS yarns with high crystallinity, high amorphous orientation, densely packed lamellar stacks, and a small tilting angle of crystalline lamellae. High draw ratio tends to result in PET industrial yarns with large long period and a large tilting angle of lamellae. Heat‐setting process has a significant influence on the amorphous orientation and crystalline structures, such as crystallinity, crystallite size, as well as crystal grain number. Compared with other structure characteristics, amorphous orientation plays a more important role in determining the tenacity, initial modulus, part load elongation, ultimate elongation, as well as shrinkage of PET industrial yarns. The crystal grain number seems to have an effect on the initial modulus, while the long period influences the elongation of the yarns to some extent. In addition, the small tilting angle of crystalline lamellae may relate to the dimensional stability of PET yarns. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42512. 相似文献