基于事故树的电镀厂房火灾危险性分析

电镀厂房具有较大火灾危险性.本文通过分析电镀厂房的特点和火灾爆炸事故的产生原因,建立事故树对引起电镀厂房火灾爆炸事故的各种风险因素进行了分析,最后根据分析结果提出相应的预防措施,对电镀厂房的安全生产和预防火灾爆炸事故具有指导意义.     

橡胶加工联合厂房建筑设计的探讨

本文根据天津国际联合轮胎和橡胶有限公司大型工程胎厂房的建筑设计实践,对橡胶加工联合厂房建筑设计作了初步探讨。联合厂房有利于工艺生产流程的合理安排和自动化连续生产;有利于工艺设备灵活布置;有利于提高产品质量,可减少厂区占地面积和厂房围护结构面积;缩短室外道路和各种管线长度。文章强调,在联合厂房的建筑设计中,应妥善处理建筑平面布置、结构造型以及厂房的通风、采光、保温和隔热等问题,以充分发挥联合厂房的优越性。     

环保型电镀厂房

为适应我国制造业高速发展的需要,电镀行业也急需进行行业水平的提升。本文围绕在新建和提升改造电镀厂房时,如何针对电镀工艺与环境保护法律法规的要求,贯彻好“清洁生产”理念,完成好厂房的设计及施工,介绍了相关成果和实践经验。建造完成的电镀工厂运行效果可达到预期愿景。     

工业厂房建筑立面优化处理实例

工业建筑设计 ,尤其在化工厂房的建筑设计中 ,人们常会忽略将建筑艺术融会于其中。这是由于受生产工艺的种种限制 ,一般只注重工艺流程、设备安装、管道布置及安全生产等诸多因素 ,对由此造成生产环境的不完美因素 ,往往重视不足。作为建筑设计人员 ,在考虑工业厂房设计的同时     

电镀厂房设计的几点体会

综合叙述了电镀厂房设计中涉及的几个突出问题，提出了解决问题的方法，并对厂房投产后的使用效果做了简明的分析和总结。     

电镀车间设计施工中几个应注意的问题

电镀车间设计施工是一项专业技术要求很强的工作,除要求具备土建知识外,还要求有一定的电镀现场实践知识。它需要考虑的因素很多,一些看似很小的容易忽视的问题,却往往危害很大。笔者根据本单位新厂房的设计施工及外出参观几处电镀车间的情况,谈几个问题供大家参考。 (1)电镀厂房的高度与通风问题 某军工企业原地处山区,电镀车间钢铁氧化厂房高6m,顶部开有天窗,零件经氧化处理后,在厂房内经清理、交验、清点后送库房。20多年来从未发生过什么问题。该厂搬入市区后,负责设计工作的机电部某设计院以改善通风条件为由,将原来7m高的黑氧化厂房上3m下4m的分成两层,上层安装送风机为下层送风。结果弄巧成拙,由于厂房仅4m高,工人下班关闭抽风和送风机后,酸雾和湿热空气不易自然散去,使厂房内空气的腐蚀性大大增强,发生零件氧化处理后短时间内就出现腐蚀现象。最后只好在厂房外另盖一间房,做为零     

浅谈有爆炸危险的甲乙类生产厂房的防爆设计

根据作者对甲乙类生产厂房设计的经验,指出防爆厂房建筑设计中应该注意的三个问题,即:平面布置、泄压设施的设置及防爆车间设计的一般措施要求。希望能够对从事类似工作的同行提供一些参考。     

石油化工建筑设计常见易混淆的问题

石油化工建筑设计中经常会遇到一些容易混淆的问题,如变配电室的火灾危险性分类、防火分区的划分、厂房或泵房在何种情况下不能设地沟或地坑等诸如此类问题。针对建筑设计中一些常见易混淆的问题进行了一系列的论述,目的是提醒同行们此类问题不容忽视。     

防火规范在化工设计中的应用

化工厂房防爆、防火及安全疏散设计是一个重要工作,严格遵守相关的国家规范——《建筑设计防火规范》GB50016—2014(以下简称《建规》)。以《建规》为基础,以化工厂房设计为研究对象,对《建规》在化工厂房防爆、防火及安全疏散设计中的应用进行了简要分析,保证化工厂房设计安全,达到国家标准。     

电镀工业园区规划设计中的清洁生产思考与分析——以宁波市鄞州电镀工业园区为例

在清洁生产理论的指导下,对宁波市鄞州钟公庙电镀工业园作了深入调研,指出了园区厂房布局及防腐所存在的问题,并给出了解决办法,如将厂房走向设计成与主导风向一致,采用夹层式厂房等.     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。