共查询到19条相似文献,搜索用时 171 毫秒
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超超临界机组锅炉煤粉管道和磨煤机的运行状况对电厂的安全经济运行有着重要的影响,但一直缺少有效的监测手段.基于光脉动法对煤粉浓度和细度进行了测试,并利用互相关原理测试了煤粉速度.研制了煤粉在线监测系统,对山东邹县发电厂1000 MW超超临界机组对冲燃烧锅炉48根煤粉管道内煤粉浓度、细度以及速度参数进行了在线测试.实验结果表明,研制的监测系统能够对上述参数进行实时准确测量,实现了对磨煤机的工作状态以及锅炉炉膛内火焰燃烧均衡状况的评估,从而为机组的安全稳定运行提供了重要依据. 相似文献
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以电感耦合等离子体-原子发射光谱法(ICP-AES)测定青海省不同地区锅炉用水中8种元素含量.方法的回收率在90.0%-100.6%之间,相对标准偏差不大于4.03%.实验证明,建立的方法简单快速,精密度高,满足对锅炉用水中微量元素的监测要求. 相似文献
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电站锅炉系统性能仿真模型的建立 总被引:1,自引:0,他引:1
1引言根据热力学第二定律,燃料中的化学拥将近一半损失在锅炉的燃烧与传热过程中。因此,优化锅炉性能对降低整个火电机组的煤耗率具有明显效果。完整的锅炉系统由磨煤机、送风机、一次风机、弓讯机、炉膛、汽包、过热器、再热器、省煤器、空气预热器等单元组成,这些单元之间的联结错综复杂。本文建立了锅炉系统中通用单元的性能模型,并在此基础上,对锅炉系统的结构特点进行了分析,利用过程系统工程中的序贯模块法建立了整个锅炉系统的性能模型。对单元的划分、回路的切断及断裂流股的收敛与迭代策略提出了自己的观点。最后根据生产厂… 相似文献
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以电感耦合等离子体-光学发射光谱法(ICP-OES)测定蒸汽锅炉与热水锅炉水中9种元素含量变化。方法的回收率在90.0%—02.6%之间,相对标准偏差0.87%—3.12%。实验证明锅炉进水中含量最高的元素是钙、钠和镁。经过蒸汽锅炉和热水锅炉处理后,水中的微量元素发生了显著变化,且蒸汽锅炉和热水锅炉中的水质也有一定的差异。 相似文献
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The present work focuses on the characterization of boiler tube walls using laser-induced plasma spectroscopy technique with visual inspection by optical and scanning electron microscopy of the cross-sections of these tubes. In a watertube boiler, water runs through tubes that are surrounded by a heating source. As a result, the water is heated to very high temperatures, causing accumulation of deposits on the inside surfaces of the tubes. These deposits play an important role in the efficiency of the boiler tube because they produce a reduction of the boiler heat rate and an increase in the number of tube failures. The objectives are to determine the thickness and arrangement of deposits located on the highest heat area of the boiler and compare them with tube parts where the heat flux is lower. The major deposits found were copper and magnetite. These deposits come mainly from the boiler feedwater and from the reaction between iron and water, and they do not form on the tube walls at a uniform rate over time. Their amount depends on the areas where they are collected. A Nd:YAG laser operating at 355 nm has been used to perform laser-induced plasma spectra and depth profiles of the deposits. 相似文献
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随着物联网技术的高度发展,智能家居在采暖领域焕发了新活力,壁挂炉因具有强大的集中供暖能力,能广泛应用在我国北方大面积采暖领域,但传统壁挂炉的控制方式不具备网络化功能,为了解决壁挂炉传统控制方式的不足,提出基于物联网技术的智能家居采暖远程控制系统;该系统保留了原有壁挂炉显示面板和控制面板的串口通讯方式,在中间增加一个基于OpenWrt路由器的数据采集模块,在维持系统原有的通讯情况下,完成了壁挂炉的远程控制;经实验测试,搭载远程控制APP的移动终端能与网络化改造后的壁挂炉正常通讯,并完成指定操作;同时,壁挂炉也充当家庭网关,自动组建家庭网络,以供其他移动设备连接;该系统使用户摆脱了近距离操作壁挂炉温度参数的限制,使壁挂炉的控制变得更智能、更便捷,也为壁挂炉的远程控制提供可参考的网络化改造方案。 相似文献
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Hassan Karimi-Maleh Ali A. Ensafi Hadi Beitollahi Vahid Nasiri Mohammad A. Khalilzadeh Pourya Biparva 《Ionics》2012,18(7):687-694
This paper introduces a carbon paste electrode modified with ferrocene and carbon nanotubes as a voltammetric sensor for determination of sulfite at pH 7.0. The results showed that under the optimum condition (pH 7.0) in cyclic voltammetry, the oxidation of sulfite occurred at a potential about 280?mV less positive than the unmodified carbon paste electrode. Kinetic parameters such as electron transfer coefficient (??) and heterogeneous rate constant (k) for sulfite were also determined using electrochemical approaches. Under the optimized conditions, the electrocatalytic oxidation peak current of sulfite showed two linear dynamic ranges with a detection limit of 0.1???M for sulfite. The proposed method was examined as a selective, simple, and precise method for voltammetric determination of sulfite in some real samples such as weak liquor from wood and paper industry, boiler water, river water, industrial water, and tap water. 相似文献