窑头与冷却机联接部的改进

1 概况 我厂烧成系统是设计能力为年产11.5万吨的五级旋风预热器窑,冷却机为L2424型筒式冷却机。窑头与冷却机联接部原设计为简易迷宫式密封(图1)。该密封装置使用不到半年,漏料现象已非常严重,每班达5吨左右,因此,我们对该密封装置存在的问题进行了分析并作了相应改进。     

2500t/d水泥熟料生产线冷却机升级新途径

某水泥熟料2 500t/d生产线原冷却机存在出冷却机熟料温度较高,二、三次风温较低,热回收效率低等问题,经采取保留冷却机壳体,并将冷却机内部更换为步进式冷却机篦床、传动等部件,尾部增加尾置辊式破碎机等措施后,热回收效果明显提升,出冷却机熟料温度90℃～95℃,热回收效率为74.9％,冷却机工艺指标在国内同规格生产线中达...     

氧化铝熟料窑冷却机简体更换改进方法及其操作实施

1冷却机简体更换改进方法提出的背景 烧结法生产氧化铝熟料的流程是回转窑完成熟料烧成后,出窑熟料进入冷却机内进行冷却,然后通过运输机械送到熟料仓内。系统中回转窑和冷却机都是核心设备;其中冷却机大多为单筒冷却机,且通常布置在回转窑的下方。     

关于熟料冷却机的作用及对余热发电的影响

在水泥熟料烧成系统中,冷却机起着熟料冷却、气固两相热交换、熟料输送三大作用.该文从以上几方面对熟料冷却机的功效进行阐述,并对熟料冷却机的应用实例以及对余热发电的影响进行了分析.     

试论冷却机的热效率对回转窑热耗和产量的影响

本文讨论了冷却机的热效率对回转窑热耗和产量的影响程度,通过生产数据的计算分析,对目前三种论点进行了讨论,认为应从工艺、传热、设备诸方面综合考虑冷却机热效率的影响。冷却机的热效率变化时,回转窑热耗波动值和二次空气热含量波动值之比与冷却机热效率的波动范围有关,不是一个定值,在一般情况下,其比值为2左右,因此提高冷却机的热效率是降低回转窑热耗的有效措施,但也不能夸大冷却机热效率的影响。     

解决回转窑卸料口与冷却机弯头问题

随着湿法向干法生产工艺的迅速转变,七十年代初,欧洲水泥工业中安装了带有多筒冷却机的大型回转窑。这种冷却机减少了燃料的费用,降低了出窑熟料的温度,这些在与持续上升的能源价格竞争中是很重要的。虽然多筒冷却机结构是众所周知的,但是新的大型多筒冷却机生产则遇到许多机械方面的困难,而且起初耐火衬料寿命也是一个主要问题。影响后者的因素有:弹性变形;热应力     

WHEC-5500步进式高效冷却机的应用与技术经济分析

合肥水泥研究设计院研发的WHEC-5500型步进式高效冷却机在陕西宝鸡众喜金陵河水泥有限公司5000t/d熟料生产线上获得成功应用。文章一一介绍了该冷却机的技术特点和性能优势,安装调试中所遇问题及其处理,以及实际运行效果。在此基础上,与同规格的第三代篦冷机进行了技经指标对比,结果表明WHEC-5500型步进式高效冷却机热回收热效率高,不仅节煤又节电,且设备及土建投资也低,性能优势显著。     

氧化铝熟料窑冷却机筒体更换改进方法及其操作实施

<正>1冷却机筒体更换改进方法提出的背景烧结法生产氧化铝熟料的流程是回转窑完成熟料烧成后,出窑熟料进入冷却机内进行冷却,然后通过运输机械送到熟料仓内。系统中回转窑和冷却机都是核心设备;其中冷却机大多为单筒冷却机,且通     

单筒冷却机扬料理论的研究

本文提出以扬起率、扬料密度、悬空率作为评价单筒冷却机扬料效果的基本参数,并以L型扬料板为例,推导了上述三个基本参数的计算方法。本文还以煅烧滑石单筒冷却机为例,利用本文提出的方法对单筒冷却机进行了优化设计。     

新一代900胶片冷却机

本文介绍了沈阳橡胶机械厂开发的新一代胶片冷却机的性能、结构特点、操作程序和安装调试中遇到的一些问题及解决方法,简单阐述了对目前国内引进的一些胶片冷却机的看法。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.