粉煤加压热解-气化一体化技术(CCSI)探讨
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摘要
陕西延长石油(集团)有限责任公司自主研发的粉煤加压热解-气化一体化技术(CCSI),首创的一体化反应器一步法,将原煤转化为粗合成气和煤焦油,过程中产生的半焦在反应器内一次性全部转化,焦油收率可达到煤格金产率的150%以上。介绍了CCSI技术的工艺原理、流程,总结了氧煤比、蒸汽煤比对循环流化床技术的影响,对比了不同气化技术操作参数。分析表明,CCSI技术气化段以半焦为原料,主要表现为异相反应,较传统的流化床技术,CCSI氧煤比和蒸汽煤比均较低;CCSI技术操作压力灵活,氧气气化的H2/CO为0.8～1.25,在化工产品领域具有一定的优势;CCSI技术兼具湍流床和输运床的特点,能量利用效率较传统的气化技术高,真正意义上实现了煤炭的分级转化、分质利用。
The Coal to Coal Tar and Syngas Integration(CCSI)Technology developed by Shaanxi Yanchang Petroleum(Group)company,Ltd and the one-step process initiated by it converts the raw coal into raw synthesis gas and coal tar.The semicoke produced in this process is converted all at once in the reactor and the tar recovery rate is more than 150% of that in the Gray-Kingassay process.This paper introduces the process principle and process flow of CCSI,summarizes the impact of oxygen-to-coal ratio and steam-to-coal ratio on circulating fluidized bed and compares the operation parameters in different gasification technologies.The analysis shows CCSI technology uses semicoke as raw material for gasification and is mainly heterogeneous reaction.Compared with traditional fluidized technology,CCSI has lower oxygen-to-coal ratio and steam-to-coal ratio.It's more flexible on operation pressure,with 0.8～1.25 of H2/CO in gasification,thus enjoys a certain advantage in chemical product field.With the features of both turbulent fluidized bed and transport bed,CCSI technology has higher energy utilization efficiency than traditional gasification technologies and realizes classified conversion and utilization based on different coal quality.
The Coal to Coal Tar and Syngas Integration(CCSI)Technology developed by Shaanxi Yanchang Petroleum(Group)company,Ltd and the one-step process initiated by it converts the raw coal into raw synthesis gas and coal tar.The semicoke produced in this process is converted all at once in the reactor and the tar recovery rate is more than 150% of that in the Gray-Kingassay process.This paper introduces the process principle and process flow of CCSI,summarizes the impact of oxygen-to-coal ratio and steam-to-coal ratio on circulating fluidized bed and compares the operation parameters in different gasification technologies.The analysis shows CCSI technology uses semicoke as raw material for gasification and is mainly heterogeneous reaction.Compared with traditional fluidized technology,CCSI has lower oxygen-to-coal ratio and steam-to-coal ratio.It's more flexible on operation pressure,with 0.8～1.25 of H2/CO in gasification,thus enjoys a certain advantage in chemical product field.With the features of both turbulent fluidized bed and transport bed,CCSI technology has higher energy utilization efficiency than traditional gasification technologies and realizes classified conversion and utilization based on different coal quality.
引文
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[13]张荣光,唐海香.蒸汽煤比等因素对循环流化床气化过程的影响[J].煤炭工程,2016(8):75-77.
[14]Liu H,Kojima T.Theoretical study of coal gasification in a 50ton/day HYCOL entrained flow gasifier.Ⅱ.Effects of Operating Conditions and Comparison with Pilot-scale Experiments[J].Energy&Fuels,2004,18(4):913-917.
[15]Xiao R,Zhang M Y.Jin B S,et al.Air blown partial gasification of coal in a pilot plant pressurized spout-fluid bed reactor[J].Fuel,2007,86(10):1631-1640.
[16]张荣光,常万林,那永杰,等.空气煤比对循环流化床煤气化过程的影响[J].煤炭科学技术,2006,34(3):46-48.
[17]李斌,黄亚继,金保升,等.蒸汽煤比对湍动循环流化床煤气化的影响[J].东南大学学报(自然科学版),2009,39(5):998-1001.
[18]吴枫,阎承信.循环流化床气化技术应用探讨[J].煤化工,2002(3):76-79.
[19]李大尚.GSP技术是煤制合成气或H2工艺的最佳选择[J].煤化工,2005,33(3):1-7.
[2]中国产业信息.2017年中国煤炭行业供需状况分析[EB/OL].(2018-01-26)[2018-05-01].http://www.chyxx.com/industry/201801/608264.html.
[3]刘思明.低阶煤热解提质技术发展现状及趋势研究[J].化学工业,2013,31(1):7-13.
[4]曾凡虎,陈刚,李泽海,等.我国低阶煤热解提质技术进展[J].化肥工业,2013,51(2):1-7.
[5]任健,李大鹏,李启明,等.CCSI技术与清洁燃气发电耦合模式竞争性分析[J].洁净煤技术,2018,24(4):96-102.
[6]王宁波,黄勇.粉煤加压热解-气化一体化技术(CCSI)的研究开发及工业化试验[J].煤化工,2018,46(1):6-9.
[7]国家能源局.煤炭深加工产业示范“十三五”规划[EB/OL].(2017-02-18)[2018-05-01].http://zfxxgk.nea.gov.cn/auto83/201703/t20170303_2606.htm.
[8]东赫,张玉柱,刘金昌,等.蒸汽煤比及氧煤比对GSP煤粉气化和GE水煤浆气化过程的影响——基于Aspen Plus模拟的双因素分析比较研究[J].计算机与应用化学,2015,10(32):1158-1161.
[9]Kim Y J,Lee J M,Kim S M.Coal gasification characteristics in an internally circulating fluidized bed with draught tube[J].Fuel,1997,76(11):1067-1073.
[10]陶明春,杜敏,郝英立.氧煤比对气流床煤气化过程的影响[J].热科学与技术,2016,9(2):177-181.
[11]Kim Y J,Lee S H,Kim S D.Coal gasification characteristics in a downer reactor[J].Fuel,2001,80(13):1915-1922.
[12]申大志.流化床煤气化技术工业化过程的优化与模拟[D].天津:天津大学,2009.
[13]张荣光,唐海香.蒸汽煤比等因素对循环流化床气化过程的影响[J].煤炭工程,2016(8):75-77.
[14]Liu H,Kojima T.Theoretical study of coal gasification in a 50ton/day HYCOL entrained flow gasifier.Ⅱ.Effects of Operating Conditions and Comparison with Pilot-scale Experiments[J].Energy&Fuels,2004,18(4):913-917.
[15]Xiao R,Zhang M Y.Jin B S,et al.Air blown partial gasification of coal in a pilot plant pressurized spout-fluid bed reactor[J].Fuel,2007,86(10):1631-1640.
[16]张荣光,常万林,那永杰,等.空气煤比对循环流化床煤气化过程的影响[J].煤炭科学技术,2006,34(3):46-48.
[17]李斌,黄亚继,金保升,等.蒸汽煤比对湍动循环流化床煤气化的影响[J].东南大学学报(自然科学版),2009,39(5):998-1001.
[18]吴枫,阎承信.循环流化床气化技术应用探讨[J].煤化工,2002(3):76-79.
[19]李大尚.GSP技术是煤制合成气或H2工艺的最佳选择[J].煤化工,2005,33(3):1-7.