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在一维炉热态试验台上,采用双调风旋流燃烧器,对比研究了一次风率f1、外二次风当量旋流强度Ωdl和过量空气系数α对石油焦、河津贫煤和神木烟煤燃烧特性的影响.结果表明:随着一次风率f1的增大,河津贫煤和石油焦的NOx排放浓度提高,前期燃烧恶化,而神木烟煤的燃烧状况得到改善,燃尽率提高,NOx排放浓度先降低后升高;石油焦和神木烟煤的着火和燃尽率分别在Ωdl=0.69和Ωdl=0.87时最佳,而两者的NOx排放浓度均在Ωdl=1.08时最低;过量空气系数α的增大使石油焦着火推迟,燃烧状况更差,NOx排放浓度更高,但使神木烟煤的NOx排放浓度更低.
In the one-dimensional furnace hot state test stand, the dual-tone cyclone burner was used to compare the primary wind rate f1, the outer secondary air equivalent cyclone intensity Ωdl and the excess air coefficient α to petroleum coke, Hejin lean coal and Shenmu The results show that with the increase of primary air rate f1, the concentration of NOx in Hejin lean coal and petroleum coke increased, the combustion in the early stage deteriorated, while the combustion of Shenmu bituminous coal improved, the burnout rate increased, NOx The emission concentration first decreased and then increased; the ignition and burn-off rates of petroleum coke and Shenmu bitum were the best at Ωdl = 0.69 and Ωdl = 0.87 respectively, while the NOx emission concentrations of both were the lowest at the condition of Ωdl = 1.08; the excess air coefficient The increase of α delayed the ignition of petroleum coke, the combustion conditions were worse and the concentration of NOx emission was higher, but the concentration of α in Shenmu bituminous coal was lower.