共查询到20条相似文献,搜索用时 93 毫秒
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1 问题
某化工厂在制氢设备检修前做动火分析,当安全科长用一台可燃气体检测报警仪测定低温制氢设备内氢气含量时,仪器显示值<4%(实际上,几次测定均在3.0%~3.8%H2之间). 相似文献
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对于船舶住舱等小型舱室而言,人员相对密集而火灾事故造成的烟气又难以通过有效手段排放。针对船舶住舱火灾烟气控制所采用的典型排烟方法,运用火灾动力学软件PyroSim进行数值模拟计算,并精心采用仿真验证试验,研究无排烟和排烟机工作时的船舶舱室烟雾蔓延规律,在此基础上依据燃烧所产生的热量设置6种排烟机功率依次增大的排烟工况,研究不同工况排烟机功率和补风条件下的控烟效果,得出较为接近实际的烟气蔓延流动时烟气温度和烟气浓度等特性参数的变化规律,以及优化选择最佳的补风方式和排烟功率的总体思路。研究结果对于船舶舱室烟气高效防控具有一定的理论和现实指导意义。 相似文献
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400m^3液化石油气球形储罐失效分析 总被引:1,自引:0,他引:1
针对长春液化气厂400m^3号球罐的内壁裂缝及鼓包问题,利用射线探伤,材质成分检测以及金相组织,扫描电镜与电子探针等分析手段进行了失效分析。结果表明,球罐失效原因主要是液化气中H2S产生的应力腐蚀及氢脆所致。 相似文献
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根据高压缓冲罐的实际应用情况,结合Unisim的动态模拟功能,从充压、泄压和备用三个工况对缓冲罐内的气体状态进行了研究,得出了各个工况下的温度压力随时间变化的特点,辨析出各种工况下存在的潜在风险,并提出了预防措施,以便在日常工作中能多一个考量维度,设计出更加完善的后备系统. 相似文献
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Major aromatic VOC in the ambient air in the proximity of an urban landfill facility 总被引:3,自引:0,他引:3
In this study, the environmental behavior of major aromatic VOC (including benzene, toluene, ethylbenzene and xylene, commonly called BTEX) in the ambient air was investigated from a mid-size municipal landfill site located in Dae Gu city, Korea in the winter of 2004. A series of field campaigns were conducted in the course of the study to cover eight different locations within and near this landfill site along with a number of VOC vent systems. The mean concentrations of different VOC species in ambient air fell in a comparable range of at or above a few ppb (e.g., the most abundant toluene 10 ppb). An inspection of the VOC data sets at the studied LF sites also indicated that they are quite analogous to those typically found in other urban areas in terms of their absolute magnitude and relative pattern (e.g., the general dominance of toluene over the other species). In light of the fact that there is active ventilation of landfill gas (LFG: e.g., with their LFG concentrations above a few to a few tens of ppm) in the study area with no other distinct source processes, it can be concluded that the effects of the landfill processes may be as important as other point sources in maintaining VOC concentration levels in certain urban areas. 相似文献
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针对某电厂660MW超超临界机组排烟温度偏高问题,根据理论模拟及现场经验总结,分析了各因素对排烟温度偏高的影响。 相似文献