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Further study of the gas temperature deviation in large-scale tangentially coal-fired boilers

机译：大型切向燃煤锅炉燃气温度偏差的进一步研究

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Gas temperature deviation in upper furnace is an important but a less reported issue in large-scale tangentially fired boilers, since they endanger largely boilers operation. Simulations are conducted in this paper to study the deviation. Perfect agreement between the simulation results and key boiler design values and available site operation records indicates that the calculations are reliable. Based on the simulations, effect of some factors, including residual airflow swirling at furnace exit, super-heaters panels, coal particle trajectories and their combustion histories, on temperature deviations are studied in details. The most important cause and how it affects the temperature deviation are located. Two new methods, a nose on front-wall and re-arranged super-heater panels, are put forward unprecedentedly to alleviate the deviations.
机译：在大型切向燃烧锅炉中，上炉中的气体温度偏差是重要的但鲜为人知的问题，因为它们极大地危害了锅炉的运行。本文进行了仿真研究偏差。仿真结果与关键锅炉设计值和可用的现场运行记录之间的完美吻合表明，该计算是可靠的。在模拟的基础上，详细研究了一些因素，包括炉子出口处的残余气流回旋，过热器面板，煤颗粒轨迹及其燃烧历史，对温度偏差的影响。找到最重要的原因及其对温度偏差的影响。前所未有地提出了两种新方法，即前壁鼻孔和重新布置的过热器面板，以减轻这种偏差。

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