本文从理论上分析了煤燃烧过程中的一次破碎过程,同时考虑热应力和内部压力积聚的作用,建立了简化的一次破碎模型,通过此模型分析了煤颗粒的粒径、炉膛温度、炉膛对煤颗粒的传热系数、煤颗粒的热扩散系数、煤颗粒脱挥发分的化学动力学参数、煤中对流孔直径、煤的孔隙率、挥发分的粘性系数以及挥发分含量这9个参数对燃烧过程中煤颗粒一次破碎的影响,分析所得结果与近年来报道的实验结论基本保持一致.
参考文献
| [1] | G. Liu;H. Wu;R.P. Gupta .Modeling the fragmentation of non--uniform porous char particles during pulverized coal combustion[J].Fuel,2000(6):627-633. |
| [2] | Dacombe P.;Williams A.;Yap L.;Pourkashanian M. .Combustion-induced fragmentation behavior of isolated coal particles[J].Fuel,1999(15):1847-1857. |
| [3] | Larry L Baxter .Char Fragmentation and Fly Ash Formation During Pulverized-Coal Combustion[J].Combustion and Flame,1992,90:174-184. |
| [4] | Lee S H;Kim S D;Lee D H .Particle Size Reduction of Anthracite Coal During Devolatilization in a Thermobalance Reactor[J].FUEL,2002,81(13):1633-1639. |
| [5] | 流化床条件下煤的一次爆裂特性的实验研究[J].燃料化学学报,2000(01):44-48. |
| [6] | J.M. Lee;J.S. Kim;J.J. Kim .Comminution characteristics of Korean anthracite in a CFB reactor[J].Fuel,2003(11):1349-1357. |
| [7] | Hongtao zhang;Kefa Cen;Jianhua Yan .The fragmentation of coal particles during the coal combustion in a fluidized bed[J].Fuel,2002(14):1835-1840. |
| [8] | Wayne S.Seames .An initial study of the fine fragmentation fly ash particle mode generated during pulverized coal combustion[J].Fuel Processing Technology,2003(2):109-125. |
| [9] | Chirone R;L Massimilla .The Application of Weibull Theory to Primary Fragmentation of a Coal During Devolatilisation[J].Powder Technology,1989,57(03):197-212. |
| [10] | Sasongko D.;Stubington JF. .SIGNIFICANT FACTORS AFFECTING DEVOLATILIZATION OF FRAGMENTING NON-SWELLING COALS IN FLUIDIZED BED COMBUSTION[J].Chemical Engineering Science,1996(16):3909-3918. |
| [11] | 黄建辉,徐明厚,于敦喜,俞云.煤燃烧过程中的热应力破碎的研究[J].华中科技大学学报(自然科学版),2004(05):78-80. |
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