为了提高邯钢高炉喷吹煤比,模拟煤粉在高炉内的热解。以邯钢喷吹用长治煤（以下简称CL）和大湾煤（以下简称DW）为原料,采用等离子体进行快速热解,计算反应后煤粉的分解率,利用气相色谱仪对气体产物进行分析以及用扫描电镜（SEM）观察反应产物的形貌特征。试验结果表明,CL和DW的分解率分别为43.10%和52.04%,气相产物主要为CO、H2、CH4、C2H2及少量C2H4等气体,热解产物的粒径减小,形貌发生明显变化。在CL煤的基础上配加不同比例的DW后,煤粉颗粒出现了孔状结构,因此可以提高炉内风口回旋区固定碳颗粒的燃烧率,为提高煤粉燃烧率提供理论依据。
Aimed at increasing pulverized coal injection at Handan Steel,the pyrolysis of coal in raceway was simulated.The coal of CL and DW were selected and the decomposition rate was calculated by plasma pyrolysis.Gas products were analyzed by gas chromatography and morphology of residues were observed by scanning electron microscopy（SEM）.The results show that CL and DW decomposition rate is 43.10% and 52.04% respectively and gas products of coal after plasma pyrolysis,which are different from general pyrolysis,consist of CO,H2,CH4,C2H2 and small content of C2H4,etc.Pyrolysis product has changed evidently,particle size become smaller.The vesicular structure occurs in coal grains when DW is added in the sample,which makes the specific surface area of coal grain increase.The solid carbon combustion ratio in tuyeres can be enhanced,which will provide the theoretical basis for pulverized coal combustion rate.
参考文献
| [1] | 刘兴惠;吴炽.鞍钢高炉喷吹煤粉合理配煤的试验研究[J].炼铁,1997(01):5. |
| [2] | Junhong Wang;Juan Du;Liping Chang .Study on the structure and pyrolysis characteristics of Chinese western coals[J].Fuel Processing Technology,2010(4):430-433. |
| [3] | 鲍卫仁,章劲草,申曙光,曹青,吕永康.大同煤在等离子体热解中生成HCN和NH3的研究[J].煤炭学报,2006(02):232-236. |
| [4] | 王大鸷 .煤在氢氩直流电弧等离子体中热解特性及固相产物的研究[D].太原:太原理工大学,2002. |
| [5] | V. Zubkova;V. Prezhdo .Change in electric and dielectric properties of some Australian coals during the processes of pyrolysis[J].Journal of analytical & applied pyrolysis,2006(2):140-149. |
| [6] | L Chen;C. Zeng;X. Guo .Gas evolution kinetics of two coal samples during rapid pyrolysis[J].Fuel Processing Technology,2010(8):848-852. |
| [7] | 朱学栋,朱子彬,韩崇家,唐黎华.煤的热解研究Ⅲ.煤中官能团与热解生成物[J].华东理工大学学报（自然科学版）,2000(01):14-17. |
| [8] | 田亚俊 .煤在电弧等离子体射流中的反应过程研究[D].太原:太原理工大学,2001. |
| [9] | 杨巨生,鲍卫仁,张永发,谢克昌,樊友三.煤在等离子体热解制乙炔工艺过程优化研究[J].化学工程,2005(06):51-54. |
| [10] | 顾瑶;许晋源;沈红梅 .煤颗粒燃烧的形貌特征和表面平度理论[J].应用科学学报,1995,13(02):1. |
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