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首页> 外文期刊>Oxidation Communications >RESEARCH ON TRANSIENT THERMAL STRESS OF COAL MINE VENTILATION AIR METHANE OXIDATION BED
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RESEARCH ON TRANSIENT THERMAL STRESS OF COAL MINE VENTILATION AIR METHANE OXIDATION BED

机译：煤矿通风瓦斯氧化床瞬态热应力研究。

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摘要

Heat reflux oxidation is a new combustion technology which can achieve gas drainage and thermal efficient recycling. This article fully considering the interaction between the fluid flow field and structure deformation, using one-way FSI method, simulated the transient thermal stress of coal mine ventilation air methane (VAM) oxidation bed, which caused by temperature variation in the heat storage and release processes. Temperature field calculation results shows: with the increase of number of alternate cycles, the temperature of the bed is periodically rise. When the alternate time exceeds 1440 s, the temperature variation of the bed is small, and after the process of endothermic and exothermic, it tends to a stable state. Finally, temperature of the 0 m is maintained at 799 to 868 K; the temperature of 0.1 m is maintained at between 701 and 769 K. Stress field calculation results shows: with the increase of cyclic number, the thermal stress of the oxidation bed hole showed a trend of cyclical rise. Regenerative thermal stress values have a great relationship with the temperature field and its structure. The maximum thermal stress appeared at the entrance of high temperature flue gas, and the maximum value was 62.7M Pa when the heat accumulator temperature periodically stable.
机译：热回流氧化是一种新的燃烧技术，可以实现瓦斯排放和热效率回收。本文充分考虑了流体流场与结构变形之间的相互作用，采用单向FSI方法，模拟了由储热和释放过程中温度变化引起的煤矿通风甲烷（VAM）氧化床的瞬态热应力。流程。温度场计算结果表明：随着交替循环次数的增加，床层温度周期性升高。当交替时间超过1440s时，床的温度变化小，并且在吸热和放热的过程之后，趋于稳定状态。最后，将0 m的温度保持在799至868 K; 0.1 m的温度保持在701和769 K之间。应力场计算结果表明：随着循环数的增加，氧化床孔的热应力呈现出周期性上升的趋势。再生热应力值与温度场及其结构有很大关系。当蓄热器温度周期性稳定时，最大的热应力出现在高温烟气的入口，最大值为62.7M Pa。

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