共查询到20条相似文献,搜索用时 710 毫秒
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张云岭 《硫磷设计与粉体工程》1995,(4)
我厂磷酸生产原设计的滤洗液控制系统如图1所示,其主要问题是滤洗液中间槽液位控制方式欠合理。因为二洗、一洗水量控制是根据滤盘上滤饼吸干情况来决定的,而不是由滤洗液中间槽的液位决 相似文献
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影响磷酸二铵产品颜色的因素分析 总被引:3,自引:0,他引:3
结合安徽六国化工股份有限公司年产24万t磷酸二铵生产,讨论磷矿来源、中间产品磷酸质量、操作方法及工艺条件对产品颜色的影响,提出稳定控制DAP产品外观颜色的措施稳定矿源,加强磷酸质量控制,适当改变中和原始操作方法,稳定中和温度,实行中和槽低液位操作. 相似文献
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改造氢气水封槽,在水封槽底部和氢气洗涤塔排净口处各加1个三通并用管道连接,中间加阀门和视镜。改造后,优化了生产操作,节约了水资源,每年可创效益7万元左右。 相似文献
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阐述磷铵装置造粒机6kV绕线式异步电动机串频敏变阻器启动原理及运行中存在的问题。由于造粒机除去氨分布器上的结块需要其能正、反转,介绍电机定子部分正、反转的改造,转子部分无刷频感启动器的改造情况。改造后无刷频感启动器运行稳定,电动机转子部分没有发生电气故障;通过造粒机反转,粘结在氨架上的物料很快清除,从而使各种消耗降低,产量提高,经济效益显著。 相似文献
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针对旧式旋转式尿素造粒机存在的尿素溢流、运行周期短等问题,开发设计一种新型造粒机,并介绍了新造粒机的使用情况。我公司现年产尿素260kt,采用塔式造粒。尿素造粒机是造粒工序的关键设备,其性能好坏直接影响尿素系统生产的稳定。“八五”期间,我公司尿素产量翻番扩建时,采用了A型造粒机,经过改造,基本运行正常,但由于喷头部件不如人意,尿素粒度不理想。使用一年半后,该机“退役”,改用了B型造粒机。B型造粒机的使用,特别是新型喷头的应用,使尿素产品外观质量跃上了一个台阶。但是,其造粒主机部分运行状况欠佳。 相似文献
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介绍了BKG造粒机在间歇聚酯装置中的运用、工艺的生产流程、造粒机系统的PFD设备构成、BKG造粒机的设备组成及工作原理、BKG的优劣势、产品的理化特性及BKG出色的安全表现及造粒机开停车的注意事项以及在日常生产过程中遇见的典型故障及解决办法。详细说明了BKG造粒机设备的关联性、系统性、安全性的思考,更高程度地认识BKG造粒机的应用范围与领域。 相似文献
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Dr.‐Ing. W. Rähse 《化学,工程师,技术》2010,82(12):2073-2088
Water soluble polymers in the detergent industry represent on the one hand parts of the formulations of washing powder to improve the washing result, and are used on the other hand as foils for the packaging of liquid detergent portions. Insoluble, thermoplastic polymers (PE, PP, PET) are needed as packaging materials for solids, pastes, suspensions and liquids in the form of laminated cardboard, boxes, bags, bottles, buckets and tubes. The polymers can be tailored to the application. For this purpose, not only the possibilities of the reaction and synthesis technology are available, but the addition of additives manages the adjustment of the required physical, technical and optical properties, such as color and durability. In an extrusion process, the plasticized or melted material gets the product shape; any form can be produced. The packaging should convince not only in forms and functions, but also throughout the aesthetics relating to the specific brand. The product design is the sum of these parameters. 相似文献
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Y. A. Tan S. H. Ong K. G. Berger H. H. Oon B. L. Poh 《Journal of the American Oil Chemists' Society》1985,62(6):999-1006
One of the most obvious changes when oils are heated is color darkening. Palm oil darkens very rapidly compared to other oils. The cause of this rapid color development was investigated. Various methods used to pretreat Lotox crude palm oil (CPO) to retard darkening during heating were by agitation with activated carbon S511, by water and water/isopropyl alcohol (95:5) washing of neutralized and unneutralized oil, and by liquid/liquid extraction of oil using water and water/isopropyl (95:5). Pretreatment of CPO did succeed in retarding color development. Retardation was especially evident in oils previously neutralized with sodium hydroxide before washing with water and water/isopropyl alcohol. The UV spectra of the liquid/liquid extracts showed strong absorption maxima at 256 nm. The addition of a base resulted in darkening of the extracts accompanied by shifts to longer wavelengths (288 nm). Reaction with freshly diluted 1–2% ferric chloride solution gave a brown color. The development of paper chromatography in butanol: acetic acid:water (6:1:2) revealed a blue fluorescence near the solvent front, with the same relative retention time as that of tannic acid. This evidence indicates that phenolic compounds were responsible for color darkening in palm oil. 相似文献
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Franky Ruslim Bernhard Hoffner Hermann Nirschl Werner Stahl 《Chemical Engineering Research and Design》2009,87(8):1075-1084
Filter cake washing is a purification method for particulate products in liquids. This process is mostly one step of a sequence in a solid–liquid separation process. For soluble products not only the mechanical transport mechanisms in washing but also the dissolution process of the product must be considered in order to describe the washing process appropriately. An unconsidered dissolution may cause problems and often severe product loss depending on the material properties. This paper presents several methods of soluble solids washing including filter cake washing by pressure and centrifugal forces as well as moving bed washing. The advantages and drawbacks of each method are discussed to evaluate the suitability of its technical application. 相似文献
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水洗-烘焙联合预处理对稻壳微波热解产品特性的影响 总被引:1,自引:0,他引:1
预处理技术能提高生物质热解产物的品质。本文研究了水洗-烘焙联合预处理技术对稻壳微波热解的产物特性的影响,结果表明:水洗-烘焙联合预处理技术增加了固体产率,而减少了液体和气体的产率;联合预处理技术提高了稻壳微波热解气体产物的品质,气体产物中CO2含量减少,CH4和H2的含量增加,气体产物的热值提高到13MJ/m3;联合预处理技术提高了稻壳微波热解液体产物的品质,增大了液体产物中苯酚类和糖类的含量,减少了液体产物中酸的含量,简化了液体产物的成分。 相似文献
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尿素络合法生产重质液体石蜡的工艺研究 总被引:4,自引:0,他引:4
以大庆直馏柴油为原料 ,经异丙醇尿素脱蜡制得纯度较高的重质液体石蜡和低凝点脱蜡油。研究了络合反应温度、尿油比、反应时间以及络合物洗涤次数和洗涤油用量对工艺过程的影响 ,并得出了适宜的生产条件 相似文献
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我国织物洗涤剂行业现状及发展 总被引:3,自引:1,他引:2
概述了我国织物洗涤剂行业的现状。我国作为亚太地区最大的织物洗涤产品市场,产品形式主要有洗衣粉、洗衣液和洗衣膏,其中洗衣粉是我国织物洗涤剂的主流产品,占有约60%~70%的市场份额。洗衣液以其环保优越性,已经成为我国织物洗涤剂行业发展的主要趋势。重点介绍了浓缩型、低温低泡型、含酶和无磷织物液体洗涤剂。最后探讨了我国织物洗涤剂行业的发展方向和发展趋势,即向具有高去污力、环保、节能、经济以及气味清新的液体洗涤剂的方向发展。 相似文献