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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.3: Design and Analysis; 20050717-21; Denver,CO(US) >COMPUTATIONAL STUDIES FOR THE EXAUSTED FLUE GAS
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COMPUTATIONAL STUDIES FOR THE EXAUSTED FLUE GAS

机译：排烟气的计算研究

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摘要

Pulverized coal with low average heating, producing ashes with high percentage of silica, is fired inside the furnaces of a Thermal Power Plant (TPP) of Candiota, State of Rio Grande do Sul, Brazil. The produced hot flue gas heats the water of the ECONOMIZER 01 (ECO 01) placed inside the exhausted duct. Distorted velocity profile at inlet of ECO 01 and high concentration of abrasive particles of flue gas cause drastic erosion. So intensive has been the abrasive action that some well-identified tubes end up collapsing. The unpredictable fail has caused many non-scheduled stops of the TPP. A study focused on the reduction this effect, was set up years ago. The paper shows part of this study end present results, obtained from the numerical simulation analysis of the flue gas flow. Some technical solutions are suggested to reduce the erosion of tubes providing that avoiding it showed be impossible.
机译：在巴西南里奥格兰德州坎迪奥塔的火力发电厂（TPP）的熔炉内燃烧平均热量较低的粉煤，产生的粉煤灰含量高。产生的热烟气加热放置在排气管内的ECONOMIZER 01（ECO 01）的水。 ECO 01入口处的速度分布失真以及烟道气中的高浓度磨料颗粒会导致严重腐蚀。如此强烈的磨蚀作用使一些知名的管子最终崩溃了。不可预知的失败导致了TPP的许多意外停机。几年前就进行了一项致力于减少这种影响的研究。本文显示了从烟气流量的数值模拟分析获得的部分研究结果。建议采取一些技术解决方案来减少管子的腐蚀，前提是要避免这种情况是不可能的。

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