氨气掺混比对褐煤燃烧特性及污染物释放行为的影响OA

In order to reduce the consumption rate of coal,the current common practice is to mix biomass or gas with coal to achieve balanced utilization of resources.At the same time,mixing different kinds of fuels can promote the complementarity between them and reduce flue gas pollution.In this study,the characteristics of mixed combustion of lignite and ammonia were discussed,and the changes of flue gas emission characteristics at different temperatures and ammonia blending ratios were studied.The results show that with increas-ing temperature,the combustion rate of lignite-ammonia blended fuel increases.At the same time,the emission peaks of carbon dioxide(CO2)and nitrogen oxides(NOx)in the flue gas also increase,while the contents of carbon monoxide(CO)and oxygen(O2)decrease.This shows that high temperature helps to improve the combustion efficiency of the blended fuel,but also leads to more CO2 and NOx emissions.In addition,at lower temperatures,with the increase of ammonia blending ratio,the content of COx(the sum of CO and CO2)and O2 in flue gas will decrease,while the release of NOx will increase,especially at low temperatures.However,at high temperatures,the peak emission of COx does not change significantly,but the release of NOx will increase significantly.This may be because under high temperature conditions,ammonia is more likely to react with O2 to produce more NOx.In summary,by controlling the temperature and ammonia blending ratio,the combustion characteristics and flue gas emission behavior of lignite and ammonia blended fuels can be adjusted.This helps to optimize the use of mixed fuels,reduce the consumption rate of coal,reduce flue gas pollu-tion,and provide a theoretical basis and practical guidance for optimizing the combustion process.