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<正> 蚕茧商品基地的阆中县河溪区茧站,装备了一台自动循环热风烘茧机,现已投入使用。这种CD28—2型烘茧机,是目前最先进的烘茧自动化机械设备。是南充地区蚕茧设备研制所的首次制成功的。它利用锅炉烧煤产生热量,将热能自动循环用于烘茧,发热量高达10~12万大卡,热能利用率在66%以上,热风量每小时达3400~3600立方米,日烘干茧达6吨。这种烘茧机还具有节省能源、劳力,提高烘茧质量的优点,为缫丝厂提供优质原料创造了条件。 相似文献
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上世纪七十年代,为改变我国蚕茧收烘设备的落后状况,减轻茧站职工的劳动强度,提高蚕茧质量,原四川南充第二缫丝厂于1973年成立了以蚕茧收烘界老前辈何大鹏先生为首的“自动循环热风烘茧机研制组”。在当时四川省轻工业厅有关领导和专家的关心和支持下,通过全体职工的艰苦奋斗,于1977年夏试制成功我国第一台CD78-1型自动循环热风烘茧机,烘茧机安装在四川省岳池县坪滩茧站,并于当年秋季投入试运行。该机主传动采用了白行设计制作的可控硅无级变速装置,自动进、出茧,自动定量装包等机构;热源为外部预热式,初步实现了烘茧全过程的机械化作业。烘茧时间与普通煤灶相比缩短一半, 相似文献
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本文介绍了46-1-4循环热风烘茧机的工作原理、工艺流程及主要部件的设计与参数选择,并着重对测试项目进行了必要的分析和说明.试验结果表明,该机采用电子计算机检测、控制干燥过程的工艺参数、蚕茧在各个干燥阶段的干燥条件能按预置的工艺要求自动进行调整.具有工艺合理、自动化程度高、机械性能可靠、蚕茧干燥质量好等特点. 相似文献
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本文为研究热风烘茧机直干法烘茧的可行性,采用JFH-200型六段热风循环自动烘茧机进行一次干燥法和二次干燥法对比试验;实验结果直干法比再干法烘茧上车茧率高1.04个百分点,比胶溶失率低0.35个百分点,鲜茧出丝率高0.233个百分点,洁净高0.17分。 相似文献
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借助计算机技术、电子技术,并将气象上运用的物理通风测试技术应用到鲜蚕茧烘干领域,研发成功的普适型蚕茧烘干分析控制系统,改善了茧灶内温湿度均匀性,提高了蚕茧品质的均一性和热能利用效率。该系统根据烘茧工艺目标,建立了烘茧专家系统(烘茧数据库),实现了烘茧过程的自动控制,并可适合不同蚕品种、蚕茧的含水率、烘茧工艺阶段要求,提高了蚕茧品质、设备效率与劳动工效;普适节能型蚕茧烘干分析系统烘的蚕茧解舒率达到61.6%,和大型烘茧设备相近,比传统烘茧灶的57.2%提高4.4个百分点。该系统采用灶内空气封闭循环冷凝去湿工艺,比通常的热风烘茧灶日煤耗减少15%,公斤茧煤耗减少25%;同时提高了设备效率与劳动工效,头烘、二烘平均比传统烘茧灶减少烘茧时间20min左右。 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
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在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
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近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2%的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。 相似文献
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