煤-天然气气流床共气化新技术研究
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摘要
煤-天然气气流床共气化技术是实现不同工艺优势互补的高效能源综合转化技术。通过建立煤-天然气共气化试验装置,研究气化温度、气化压力、天然气/煤、水煤浆浓度对煤-天然气共气化主要指标的影响。通过分析合成气中主要气体组成、氢碳比(H2/CO)以及CH4含量变化,优选煤-天然气共气化试验条件,最后进行煤-天然气共气化优化试验。结果表明,煤-天然气共气化较合适的反应条件为:气化温度1 300~1 400℃,天然气/煤0.75~1.50 Nm3/kg,水煤浆浓度58%~61%。以西湾煤为原料,在制浆浓度59%,入炉煤量18 kg/h,天然气/煤0.94 Nm3/kg,气化温度1 350℃、气化压力0.5 MPa的条件下,煤-天然气共气化试验装置生产的合成气产量为46.06 Nm3/h,H2+CO含量为88.64%,CH4含量为0.66%,H2/CO为1.23。说明煤-天然气气流床共气化技术是一项高效的气化技术,该技术的开发有利于实现煤与天然气共气化技术的大规模工业化应用。
Coal-natural gas co-gasification technology is an efficient comprehensive energy conversion technology that realizes the complementary advantages of different processes. The influence of gasification temperature,gasification pressure,natural gas/coal and water coal slurry concentration on main indexes of coal-natural gas gasification was studied with coal-natural gas cogasification test device.By analyzing main gas composition,hydrogen-carbon ratio(H_2/CO) and methane content in the synthetic gas,the conditions of coal-natural gas cogasification test was optimized,and the coal-natural gas cogasification optimization test was carried out.The results show that the suitable reaction conditions for coal-natural gas cogasification are gasification temperature 1 300-1 400 ℃,natural gas/coal 0.75-1.50 Nm3/kg,coal slurry concentration 58%-61%.In conditions of pulping concentration 59%,coal intake 18 kg/h,natural gas/coal 0.94 Nm3/kg,gasification temperature 1 350 ℃,gasification pressure 0.5 MPa,the production of synthetic gas,H2+CO content,methane content and H2/CO are 46.06 Nm3/h,88.64%,0.66% and 1.23,respectively using Xiwan coal as raw material. It shows that coal-natural gas co-gasification technology is a highly efficient gasification technology,that is beneficial to large-scale industrial application.
Coal-natural gas co-gasification technology is an efficient comprehensive energy conversion technology that realizes the complementary advantages of different processes. The influence of gasification temperature,gasification pressure,natural gas/coal and water coal slurry concentration on main indexes of coal-natural gas gasification was studied with coal-natural gas cogasification test device.By analyzing main gas composition,hydrogen-carbon ratio(H_2/CO) and methane content in the synthetic gas,the conditions of coal-natural gas cogasification test was optimized,and the coal-natural gas cogasification optimization test was carried out.The results show that the suitable reaction conditions for coal-natural gas cogasification are gasification temperature 1 300-1 400 ℃,natural gas/coal 0.75-1.50 Nm3/kg,coal slurry concentration 58%-61%.In conditions of pulping concentration 59%,coal intake 18 kg/h,natural gas/coal 0.94 Nm3/kg,gasification temperature 1 350 ℃,gasification pressure 0.5 MPa,the production of synthetic gas,H2+CO content,methane content and H2/CO are 46.06 Nm3/h,88.64%,0.66% and 1.23,respectively using Xiwan coal as raw material. It shows that coal-natural gas co-gasification technology is a highly efficient gasification technology,that is beneficial to large-scale industrial application.
引文
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[2]唐宏青.天然气部分氧化制合成气的研究和实践[J].中氮肥,2004(1):1-5.TANG Hongqing.Research and practice on producing synthesis gas with the process of natural gas partial oxidation[J].M-sized Nitrogenous Fertilizer Progress,2004(1):1-5.
[3]李俊岭.天然气和煤联合气化工艺及绿色过程的探索性研究[D].北京:中国科学院过程工程研究所,2002.
[5]李俊岭,赵月红,温浩,等.天然气和煤联合制备廉价合成气新工艺及其热力学分析[J].计算机应用化学,2002,19(4):381-384.LI Junling,ZHAO Yuehong,WEN Hao,et al.A new preparation process of low-cost synthesis gas from natural gas and its thermodynamic analysis[J].Computers and Applied Chemistry,2002,19(4):381-384.
[4]赵月红.天然气-煤共气化过程研究[D].北京:中国科学院过程工程研究所,2003.
[6]宋学平,郭占成.固定床天然气与煤共气化火焰区温度影响因素的研究[J].燃料化学学报,2005,33(1):53-57.SONG Xueping,GUO Zhancheng.Factors affecting flame temperature of co-gasification of natural gas and coal in a fixed bed reactor[J].Journal of Fuel Chemistry and Technology,2005,33(1):53-57.
[7]宋学平,郭占成.移动床煤与天然气共气化制备合成气的工艺技术[J].化工学报,2005,56(2):312-317.SONG Xueping,GUO Zhancheng.Research on moving bed to prepare synthesis gas co-gasification of coal and natural gas[J].Journal of Chemical Industry and Engineering(China),2005,56(2):312-317.
[8]欧阳朝斌,宋学平,郭占成,等.天然气-煤共气化制备合成气新工艺[J].化工进展,2004,23(7):751-754.OUYANG Zhaobin,SONG Xueping,GUO Zhancheng,et al.New preparation process of synthesis gas from natural gas&coal by co-gasification[J].Chemical Industry and Engineering Progress,2004,23(7):751-754.
[9]邵迪,代正华,于广锁,等.固定床气化与气流床水煤浆气化集成的能量与经济分析[J].化工学报,2013,64(6):2186-2193.SHAO Di,DAI Zhenghua,YU Guangsuo,et al.Energy and economic assessment for integrated gasification system of fixed-bed and coal-water slurry entrained-bed[J].CIESC Joural,2013,64(6):2186-2193.
[10]贺永德.现代煤化工技术手册[M].北京:化学工业出版社,2004.
[11]李雪梅,周银福,张爱民.鲁奇碎煤加压气化污水处理[J].大氮肥,2004,27(4):236-238.LI Xuemei,ZHOU Yinfu,ZHANG Aimin.Sewage treatment in lurqi pressurized coal gasification process[J].Laege Scale Fertilizer Industry,2004,27(4):236-238.
[12]蒋士鑫.碎煤加压气化含酚废水处理方法的优化[J].煤化工,2011,12(6):49-51.JIANG Shixin.Optimized method for treating the phenolic wastewater from the coarse coal gasification plant[J].Coal Chemical Industry,2011,12(6):49-51.
[13]安晓熙,曹月梅.气流床煤气化技术现状及研究进展[J].氮肥技术,2015,36(3):3-8.AN Xiaoxi,CAO Yuemei.Status and research progress of entrained-flow bed gasification[J].Nitrogen Fertilizer Technology,2015,36(3):3-8.
[14]陈家仁.加压气流床煤气化工艺的发展现状及存在问题[J].煤化工,2006,12(6):1-7.CHEN Jiaren.Technology status and problems in pressurized entrained-flow coal gasification[J].Coal Chemical Industry,2006,12(6):1-7.
[15]朱玉芹,耿胜楚,李彦,等.气流床煤气化工艺技术分析[J].化工技术与开发,2011,40(10):79-82.ZHU Yuqin,GENG Shengchu,LI Yan,et al.Technology analysis of entrained-bed coal gasification[J].Technology&Development of Chemical Industry,2011,40(10):79-82.
[16]唐宏青.现代煤化工新技术[M].北京:化学工业出版社,2009.
[17]于遵宏,沈才大,王辅臣,等.水煤浆气化炉的数学模拟[J].燃料化学学报,1993,21(2):191-197.YU Zunhong,SHEN Caida,WANG Fuchen,et al.Mathematical simulation of coal-slurry-gasifier[J].Journal of Fuel Chemistry and Technology,1993,21(2):191-197.