共查询到19条相似文献,搜索用时 328 毫秒
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造成大型电站锅炉过热器爆管的原因很多,本文对过热器爆管的根本原因进行综合分析,并从根本提出过热器爆管的预防措施,进而有效地防止过热器爆管事故的发生. 相似文献
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本文以某余热电站为背景,针对锅炉运行中经常碰到的爆管问题,阐述了爆管造成的损失、爆管发生的现象,分析了爆管产生的原因,给出了利用计算机预防和预报爆管的方法。 相似文献
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锅炉爆管严重威胁机组安全运行,叙述了水冷壁、过热器、再热器爆管的区别,为减少爆管的危害,针对实际情况研究了运行调整方式。 相似文献
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针对水泥余热炉中压蒸发器管屏爆管进行了分析研究,判断爆管产生的原因,并提出针对性改进措施,从而避免爆管的再次产生。 相似文献
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300MW机组锅炉再热器系统可靠性的探讨 总被引:1,自引:0,他引:1
针对300MW机组锅炉再热器频繁爆管问题,从爆管部位的宏观检查及金相分析入手,并根据热力试验的壁温分布,分析了产生爆管的原因,提出了解决问题的近期和长远办法,以便控制再热器频繁爆管的被动局面,提高再热器系统的可靠性。 相似文献
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过热器爆管是较常发生的锅炉安全事故,通过对某工业锅炉过热器爆管现象进行分析,从不同角度分析了产生爆管的原因,进而提出预防与控制措施. 相似文献
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本文是对一起后拱水冷壁管高温蠕变爆管事故的技术分析。通过对事故现场进行调查,事故原因是由于后拱耐火砖脱落导致后拱水冷壁受高温产生蠕变爆管。对蠕变、鼓包、爆管管壁的金相组织进行了分析。阐述了蠕变爆管和珠光体球化、石墨化的机理。 相似文献
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通过历年我国钢铁企业、宝钢和首钢风温变化,反映了我国近年的风温现状和技术进步,特别指出了首钢风温的巨大进步。从热风炉高风温、热风管道输送高风温和高炉接受高风温三方面介绍了高风温技术研究进展。通过高风温技术在迁钢2号高炉的应用,首钢在2008年高风温试验基础上,2009年取得重大突破,实现日均风温最高1283℃,连续4月月均1270℃以上风温,年均风温为1258.7℃。通过分析2008和2009试验风温均匀性,表明风温均匀指数有所提高。并分析了热风炉炉顶温度、混风、空煤气预热温度、操作制度等风温影响因素,从高炉原燃料、技术指标和操作方面,阐述了高风温在高炉使用情况,反映了高风温受热风炉系统、热风管道和高炉等因素制约。提出了本次高风温试验存在的风温潜力、高风温节能作用和风温稳定性等问题,为进一步高风温研究提供指导。 相似文献
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分析了高炉煤气富氧燃烧的基本特性,讨论了采用高炉煤气为燃料的热风炉,其富氧混合操作、空燃比设定、废气和拱顶温度的变化及运行效果,对采用富氧燃烧技术热风炉的操作和使用有一定的指导意义. 相似文献
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The technology ‘blast furnace—converter’ dominates at present in the production of steel all over the world. Therefore, the blast‐furnace process is continuously being improved, among others, by raising the thermal parameters, such as temperature and oxygen‐enrichment of the blast, as well as the addition of auxiliary fuels. The changes in the consumption of coke go together with changes in the consumption of blast, the production of top‐gas and its consumption in Cowper stoves, as well as the production of electricity in the recovery turbogenerator utilizing the waste exergy of the top‐gas due to raised pressure. Related to a unit of pig iron production, these values are called energy (exergy) characteristics of the blast‐furnace plant. They serve as a quantity measure of the thermal improvement of the blast‐furnace process. This paper presents an algorithm of the process exergy analysis of simulative investigations of the influence of increased thermal parameters on the thermodynamic perfection of the process and the blast‐furnace plant. This algorithm bases on the theoretical empirical balance method of the ‘input–output’ type. By means of this algorithm the influence of increased thermal parameters of the process not only on the saving of coke but also of the blast can be determined, as well as of the production and composition of top‐gas, the consumption of top‐gas in the Cowper stoves and the production of electric energy in the recovery turbine. The blast‐furnace process displays a high exergy efficiency, whereas the process of compressing and preheating the blast is characterized by rather high exergy losses due to the application of the combustion process. It has been shown that the internal exergy losses in the blast furnace are comparable with the exergy losses in the processes of compressing and preheating of the blast. Calculations were carried out for a modern Polish blast furnace with a volume of 3200 m3. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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The efficiency of coal combustion is important for the blast furnace process. Incomplete combustion of coal does not reduce coke consumption as can be expected and decreases burden permeability which results in improper gas flow and temperature distribution. Consequently, this reduces the throughput of the blast furnace.
This paper describes combustion conditions and mechanisms of coal combustion in the blast furnace, and discusses factors affecting coal combustion such as injector location, coal type, injection rate, maceral composition, and air blast parameters. Also, mathematical models of coal and coal/coke combustion in the blast furnace are considered. 相似文献
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