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首页> 外文期刊>International journal of green energy >EMISSIONS DURING VOLATILES AND CHAR COMBUSTION PERIODS OF DEMORALIZED LIGNITE AND WOOD BLENDS
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EMISSIONS DURING VOLATILES AND CHAR COMBUSTION PERIODS OF DEMORALIZED LIGNITE AND WOOD BLENDS

机译：脱灰褐煤和木材混合物挥发和炭燃烧期间的排放

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摘要

Today, much interest has been given to the utilization of materials of plant origin as substitutions of fossil fuels in meeting energy needs to reduce the level of atmospheric pollutant emissions and global warming threat. Special emphasis has been placed on the co-combustion of coal and biomass. In this study, SO_2 and NO_x emission levels during volatiles evolution and combustion periods of single pellets of one high sulfur content lignite, demineralized lignite, poplar wood, and their blends were studied by burning them in a cylindrical wire mesh basket placed into a preheated tube furnace. Flue gas composition revealed that majority of sulfur-containing components evolved and oxidized to SO2 during volatiles combustion, and no SO_2 was involved during the most length of char combustion period. NO_x emissions were only in the form of NO, confined mostly in volatile matter combustion periods, and continued after disappearance of volatiles flames in very smaller levels. NO formation can be explained mostly by fuel and volatiles flame NO mechanisms. Except lignite-wood blend, no synergy was observed in the combustion of demineralized lignite-wood blends in terms of pollutant components.
机译：如今，人们对利用植物来源的材料替代矿物燃料来满足能源需求以降低大气污染物排放水平和全球变暖威胁表示了极大的兴趣。特别强调了煤和生物质的共燃烧。在这项研究中，通过将一种高硫含量褐煤，软化褐煤，白杨木及其混合物的单粒颗粒在置于预热管中的圆柱形金属丝网篮中燃烧，研究了挥发物演变和燃烧期间SO_2和NO_x的排放水平炉。烟气成分表明，在挥发物燃烧过程中，大多数含硫成分会释放并氧化为SO2，而在焦炭燃烧的最长时间内，不会涉及SO_2。 NO_x排放仅以NO的形式存在，主要限制在挥发物燃烧期间，并且在挥发物火焰消失后以很小的水平继续排放。 NO的形成主要可以通过燃料和挥发物的火焰NO机理来解释。除了褐煤-木材混合物之外，在脱矿褐煤-木材混合物的燃烧中，在污染物成分方面未观察到协同作用。

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