共查询到18条相似文献,搜索用时 125 毫秒
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电站锅炉炉膛爆炸事故原因及预防 总被引:1,自引:0,他引:1
电站锅炉炉膛爆炸是火力发电厂事故中比较严重的事故之一.论述了电站锅炉因煤粉等燃料的爆燃、水冷壁爆管、过热器爆管、再热器爆管、炉底析铁氢爆等导致炉膛破坏的原因,并针对不同的爆炸原因,分别提出了相应的预防炉膛爆炸措施. 相似文献
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文章通过对一起锅炉爆炸事故的分析,认为对于现在常见的额定压力较低的卧式内燃燃油(气)干背式锅炉安装时本体不固定,有可能存在发生炉膛爆燃时引发锅炉本体爆炸的隐患. 相似文献
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针对某台 2 2 0t/h循环流化床锅炉在整定安全门期间所发生的水冷壁蠕胀、炉膛爆燃事故进行了分析 ,并从运行角度提出了预防措施 ,对该类型锅炉的安全运行具有重要意义。 相似文献
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对于某些燃用高挥发份,高灰份且易结渣煤的电站锅炉,在正常运行中,频繁发生因炉膛上部较大体积的掉渣或塌灰而造成锅炉瞬间灭火事故,在排除其它有的因素外,提出炉膛下部发生可燃气体爆燃的推测,并结合锅炉的实际运行工况对发生爆燃引起灭火的机理进行了初步分析,能够比较合理地解释灭火的原因,并具有新颖听理论价值,对采取相应的解决措施有比较重要的参考价值。 相似文献
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秸秆直燃锅炉是秸秆发电的核心设备之一,其上料系统中的料仓经常容易发生粉尘爆燃事件,甚至还能引发人员伤亡和设备损坏事故。本文通过分析爆燃发生的原因,通过降低粉尘浓度、防止锅炉燃烧正压回火等措施可以有效防止或者杜绝料仓粉尘爆炸事件的发生。本篇主要结合某公司的系统实例提出关于如何防止料仓爆炸的几点对策。 相似文献
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1.情况调查与分析为防止卧式内燃燃油锅炉炉膛烟气爆炸事故发生,卧式内燃燃油锅炉是否应设防爆门,尚是一个有争议的问题。认为不必装设防爆门的理由,主要有以下两个方面:(1)当燃油锅炉发生炉膛烟气爆炸时,锅炉本身的动态强度、应设的防爆门排放面积及防爆门的动作特性等问题,目前均无成熟的确定办法。(2)由于燃油锅炉炉膛烟气爆炸时,能量释放速率较燃气时慢,爆炸力度较低,因而燃油锅炉炉膛烟气爆炸时压力上升较慢,而泄压效果较好。另外,卧式内燃燃油锅炉炉膛容积小,不仅使其爆炸能量与水管锅炉相对比较小,而且由于泄压速… 相似文献
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Hydrogen deflagration in confined spaces is an important safety issue. The dispersion of a stratified layer of hydrogen due to molecular diffusion is studied. It represents an important class of problems related to long term behaviour of hydrogen release in confined spaces. Diffusion being a slow process, gives an upper bound on the time taken for the stratified layer to mix with air below. A method, based on four indices, namely, average mole fraction (of hydrogen), non-uniformity index, deflagration volume fraction and deflagration pressure ratio, developed recently by the authors, is used to provide vital temporal information on mixing of the stratified layer with air below and formation of flammable cloud in the enclosure. In the present paper, stratified layers of different thickness are considered and the temporal evolutions of the above indices are plotted against diffusion Fourier number. The results in non-dimensional form provide an upper bound of the time that would be required to form a uniform mixture and to attain a state with respect to deflagration potential for enclosures of different sizes. This estimate is an important input for planning mitigation measures before the accident and for post accident investigations. 相似文献
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本文针对稠油热力开发在用23t/h工业注汽锅炉燃烧渣油过程中出现的炉管结渣和积灰严重、导致热效率下降的状况,通过技术调研,根据弱爆炸吹灰原理,经过优化设计,首次在稠油油田注蒸汽锅炉上应用弱爆吹灰技术,确保注汽锅炉的高效运行,有明显的节能效果。 相似文献
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《International Journal of Hydrogen Energy》2022,47(87):37125-37137
With the industrial application of syngas, the explosion accident caused by it has gradually become a topic of concern for researchers. In this paper, the effects of CO2 addition on the deflagration characteristics of syngas-air premixed mixtures were investigated through experiments and numerical simulations. Experiments were carried out inside a T-pipeline, using a high-speed camera and a pressure sensor to simultaneously record the flame evolution and pressure dynamics during deflagration. Simulations were calculated using the GRI 3.0 mechanism by Chemkin Premix Code. The results show that the addition of CO2 has a certain inhibitory effect on the flame propagation, which can make the finger flame in the vertical pipe evolve into a “tulip” flame. And under the inhibition of CO2, the deflagration overpressure of the mixture is reduced, and the number of H, O, OH radicals is also greatly reduced, and the chemical reaction rate is correspondingly slowed down. 相似文献
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由于锅炉结构不合理造成锅炉两侧后集箱严重鼓包的事故,处理的方法,将集箱割短2231mm,将下降管(A)及集箱封头重新开口和焊接,无损探伤及耐压试验合格后,该炉重新投入运行。 相似文献
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赖光楷 《中国锅炉压力容器安全》2009,(2):1-5
通过真空锅炉爆炸事故实例分析,说明真空锅炉也存在爆炸危险,真空锅炉的优势不是“绝对安全”,而是节能。建议锅炉制造企业要像对待承压锅炉一样重视真空锅炉的安全设计和制造质量控制:真空锅炉应当重新纳入国家质检总局特种设备监管;工业锅炉行业协会要尽快制定真空锅炉行业标准。 相似文献
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锅炉排污是锅炉运行中的重要操作,许多锅炉运行中发生爆管是排污不当造成的,锅炉排污问题应引起锅炉运行、操作、管理人员的重视,避免引起锅炉事故. 相似文献