干燥效果好能量消耗低的凯勒·克利曼干燥器

如果输入干燥器的热风的热含量高，那么干燥废气才会达到良好的指标，此外，干燥过程必须达到以下两个目的才是有效的：一是对干燥器内所有坯体能进行大面积的干燥；二是使几乎所有坯体都达到最佳干燥效果。凯勒.克利曼干燥器正是按以上要求设计而成。     

树脂结合Al2O3-C耐火泥料挥发分的快速测量

耐火泥料挥发分测量是一个受热干燥过程,由于测量仪器热惯性、蒸发过程时滞性和升温速度等限制,造成检测时间较长.采用Levenberg-Markuardt算法按照多种干燥经验模型对热失重数据进行拟合,并对结果进行了比较,确定了能够较好描述耐火泥料干燥过程的数学模型和数据段.在此基础上,采用神经元网络方法建立了热失重过程预报模型,结果表明,该方法能够实现耐火泥料挥发分的快速、准确测量,检测时间由6～8 min缩短到2 min以内,挥发分预测误差小于0.05％.     

污泥干燥焚烧一体化中热量计算的探讨

介绍了几种常用的污泥干燥焚烧一体化技术及其设备,分析了污泥在转筒干燥-循环流化床焚烧一体化设备中的热量输入、输出过程,对污泥干燥以及焚烧设备的设计有一定的参考价值。     

基于时序迁移与双流加权的ONLSTM软测量建模

实际化工过程建模具有多变量、非线性和动态性等特点,会导致模型复杂度提高且提取特征时产生冗余信息和时序分布漂移问题,因此提出一种基于时序迁移和双流加权的有序神经元长短时记忆网络(ONLSTM)模型。首先,利用时序迁移对特征分布进行匹配以自适应表征特征分布信息,采用划分特征分布差异最大时间域进行训练,减小时序分布失配,从而解决时序分布漂移问题;其次,在时序迁移框架内嵌入双流加权ONLSTM模型,通过对ONLSTM主遗忘门和主输入门分别加权,更精确控制传递信息;进一步结合双流结构设计双信息流控制相应门控单元,减小参数调节过程中的耦合影响,降低模型复杂度,提高其预测性能;最后,将所提模型应用于硫回收过程以及某火电厂脱硫过程排放烟气SO₂浓度软测量建模,并与其他深度学习网络进行对比,验证了模型有效性。     

DCS在焦炉煤气干燥脱水控制系统中的应用

本文设计并实现了用于工业控制的DCS,以实现焦炉煤气干燥脱水的自动化控制,介绍了干燥脱水的工艺概况和系统配置;详细说明了使用时序的方法现实焦炉煤气干燥脱水过程控制的实现过程。该系统参数调整简单方便,完全实现了自动控制,并提高了系统的安全性和工作效率。     

苯胺黑干燥袋滤器爆燃事故原因分析及处理预防措施

苯胺黑是染料和添加剂，其制作过程中干燥是反复必经步骤。在苯胺黑干燥时采用闪蒸干燥系统进行干燥，干燥后的物料细粉可随气流送至袋滤器收集。但收集过程中袋滤器多次发生事故，对人身安全与财产带来危害，因此对此事故原因，处理方法与预防措施进行了分析整理。     

多孔介质喷雾干燥过程的热质传递

多孔介质是大量干燥过程的主体，由于实际多孔介质干燥过程的复杂性，建立通用的干燥过程传热传质模型十分困难。本文通过分析喷雾干燥过程中高初始含湿多孔介质与干燥介质之间的传热传质机理以及各因素对传热传质的影响，根据马歇尔方程探讨了干燥介质与料雾之间的水蒸汽分压差在干燥过程中的变化情况，反映了多孔湿介质在喷雾干燥操作中的传热传质过程的几种特性，为确定实际生产中喷雾干燥器的操作奈件指明了新的出路。     

可编程控制器在陶瓷墙地砖生产中的应用

从Ｓ５－Ｕ系列可编程程序控制器的型号，规格，技术特性以及输入／输出等方面，介绍可编程序控制器在压制，干燥，输送，入窑等陶瓷墙地砖生产工艺过程中的应用。     

林茨工艺生产氟化铝的时序控制与设计

以湿法磷酸副产的H2 SiF6为原料生产氟化铝的工艺有多种 ,它们共同的特点是反应和结晶单元的操作是间歇的 ,干燥、煅烧、冷却单元的操作是连续的 ,整个生产过程连续进行。介绍根据α -AlF3 ·3H2 O转变为 β -AlF3 ·3H2 O的工艺条件所设计的反应和结晶的时序控制和操作要点 ,并对该时序控制系统的设计方法作了简略分析。     

成球盘减速器输入轴的改进

我公司QPY32成球盘传动减速装置采用SN·BW15－23型摆线针轮减速器。几年来减速器输入轴花键经常出现挤压变形和剪切现象。其原因：在通常情况下减速机输入轴花键设计原则上采用外径定心方式，花键齿侧间隙较大，配合较松，属间隙配合。　　成球盘在投产之后，不管生产还是停机，盘内物料无法卸空，因此，成球盘开停机时必然会产生较大的惯性力，冲击花键，特别是停机，成球盘在惯性的作用下来回摆动，造成花键工作面两边受挤压和剪切，使之变形失效。　　1998年5月，我们将减速器输入轴花键改为平键，采用H7/r6过盈配合，减少轴盖两者…     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

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.     

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.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

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.