共查询到19条相似文献,搜索用时 156 毫秒
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针对不同油田回注水结垢特点,总结了目前几种结垢趋势预测方法,并对管道结垢在线监测方法如热学方法和非热学方法等进行了对比分析,讨论了各自的优势、判断标准、适用情形和局限性。最后,对目前的几种结垢监测方法进行了总结,并对新的在线结垢监测技术提出了展望。 相似文献
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根据供热网络污垢的特点,基于专家系统技术,以Delphi和Excel数据库构建专家系统知识库,开发研制了供热网络污垢在线监测系统.经实际应用收到了良好的效果. 相似文献
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以所开发的铝合金点焊在线监测系统为基础,构建了在线监测数据库.数据库通过与基于LabVIEW开发环境的在线监测系统相连接,实现了焊点质量特征参数及焊点原始特征信息的实时记录与保存.数据库为用户提供了焊点信息及人员信息的多种查询、管理功能,实现了点焊生产的信息化管理,非常适合航空航天产品的生产管理及该厂的实际情况.数据库信息为在线监测系统提供参数优化数据源,通过均值控制图法实现对在线监测系统焊点质量判定临界阈值的优化.结果表明,数据库的参数优化功能使铝合金点焊在线监测系统达到了较高的判定精度,并已在航空航天产品的点焊生产中得到应用. 相似文献
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针对80 t电炉循环冷却水系统在运行中产生的结垢和腐蚀问题,首先进行在线化学清洗,使管壁恢复原始状态,然后加入药剂进行阻垢、缓蚀、杀菌、灭藻处理,彻底解决了系统的结垢现象。 相似文献
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根据常减压蒸馏装置水冷器所处的腐蚀环境,对管程结垢和管内外腐蚀原因进行了分析,在坚持工艺防腐蚀前提下,采用CH7910涂料作内壁防护或定期进行在线清洗,管外壁采用Ni-P化学镀、阴极保护等保护方法,同时加强腐蚀监测和防腐蚀管理,取得了较好的效果。 相似文献
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在热电厂工业循环冷却水系统中,凝汽器铜管腐蚀和结垢是影响发电机组损坏和效率降低的主要原因。目前普遍采用的挂片腐蚀监测法试验周期长,反映的是金属累积腐蚀,无法了解和测试循环水腐蚀状态的波动情况。因此,建立一套实时在线监测系统,在机组正常运行的状态下有效测量出凝汽 相似文献
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电弧增材制造以电弧为载能束逐层熔化金属丝材直至形成全焊缝金属构件,因其制造成本低、成形效率高、材料利用率高等优势而备受推崇.成形尺寸的自动检测与控制是推进电弧增材制造技术工程化应用、快速产业化必须解决的关键科学与技术挑战.主要从成形工艺调控、过程在线监测与控制角度阐述了国内外电弧增材制造成形控制技术的研究现状,以红外、电参数和视觉监测原理为出发点,重点分析了现有电弧增材制造在线监测与成形控制技术的研究进展与不足,提出了未来电弧增材制造成形在线监测与控制技术的主要发展方向. 相似文献
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针对近几年加热炉维修友造及生产运行过程中出现的各种问题,在结垢、腐蚀、烧损等方面对现有火筒式加热炉损坏机理进行了深入的试验研究和理论分析,为找到并试验推广有效的防护技术以延长其使用寿命,满足油田节能降耗、平稳运行的需要,为发展提高供热技术提供参考。 相似文献
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Yang Chunhua Gui Weihua Ye Wenwu Information Engineering Institute Central South University of Technology Changsha 《中国有色金属学会会刊》1997,(4)
EXPERTOPTIMIZEDCONTROLTECHNIQUEFORELECTROLYTICDEPOSITIONPROCESSOFHYDROMETALLURGYOFZINC①YangChunhua,GuiWeihua,YeWenwuInformati... 相似文献
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ANEXPERTCONTROLSYSTEMFORPURIFICATIONPROCESSWuMin,GuiWeihua,XieYongfang,ShenDeyao,CaiZixing(DepartmentofAutomaticControlEngine... 相似文献
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Denis P. Dowling Charles E. Nwankire Riitta Keiski 《Surface & coatings technology》2010,205(5):1544-1551
Both organic and inorganic fouling are significant problems for stainless steel surfaces used in industrial applications as diverse as shipping and paper making. The objective of this study is to evaluate the anti-fouling properties of a range of fluoropolymer, fluorinated and non-fluorinated siloxane coatings on stainless steel substrates. These nm thick coatings were deposited using the atmospheric plasma jet system called PlasmaStream™. The surface properties of the plasma polymerised coatings were examined using optical profilometry, SEM-EDX, ellipsometry, contact angle measurement and FTIR. Accelerated wear testing of the coated heat exchangers indicated that coating durability was a significant issue for the nanometre thick coatings investigated. A crystallization fouling study was carried out using a laboratory scale heat exchanger test apparatus. In this the heated steel surface was in contact with flowing fluid containing CaCO3 particles. The coated steel exhibited both a delay before fouling was initiated and in addition a decrease in the fouling rate. A lubricant oil fouling study was also carried out involving a comparison between both coated and uncoated stainless steel separator discs over a 30 day period, in the engine of a passenger ferry. A significant reduction in the level of oil fouling was observed for the fluorosiloxane and fluoropolymer coated separator discs compared with the uncoated discs. 相似文献
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A novel anti-fouling epoxy-silicone composite coating containing Ni–Cu–Al alloy powder for metal pipeline in geothermal water was fabricated based on the basic principles of galvanic corrosion. Fouling behaviors of the surface of composite coating in the simulated geothermal water were studied in comparison with stainless steel and epoxy-silicone resin coating. The results indicated that composite coating possessed a good anti-fouling performance. In the geothermal water, Ni2+, Cu2+ and Al3+ ions, originated from interface electrochemical corrosion, were released into bulk solution. These metal ions intensively inhibited nucleation and crystal growth rate of CaCO3 fouling on the surface of composite coating, and promoted precipitation of CaCO3 fouling in the bulk-solution, which could be easily washed away by flowing water. But for 304 stainless-steel and epoxy-silicone resin coating, CaCO3 fouling grew easily and adhered firmly to their surfaces, and influenced the transport efficiency of geothermal water for pipelines. 相似文献
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介绍了用于钢管加热炉双交叉限幅燃烧控制的infi90控制系统的构成和通讯网络,基本控制模件CLC04指令回路控制器的硬件结构,软件功能等。 相似文献
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利用西门子1500-PLC集成的PID_temp温度控制工艺对象,设计了一种用于汽车内饰液压机的电加热控制系统。系统主要包含人机交互操作系统,电加热温度控制系统,温度采集系统,断线诊断系统。在汽车内饰液压机上进行试验,结果表明,通过专家PID调节,电加热控制系统能够达到汽车内饰液压机温度控制要求。 相似文献
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介绍了锌沸腾焙烧专家系统的结构与功能,锌沸腾焙烧的专家知识与推理,重点分析了该专家系统的主要特点,包括改造的黑板系统、动态数据交换、数学模型以及多任务机制等。该系统应用于现场的实际生产,取得了良好的效果 相似文献