煤炭地下气化过程的计算模型
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摘要
以综合计算法为基础,将地下气化过程分为干馏阶段和气化阶段,结合反应平衡计算法相关理论,引入二氧化碳还原反应、碳与蒸汽反应的平衡常数方程,并考虑地下气化过程中瓦斯涌出、地下水渗入、工作面采出率、炉体排水、围岩散热和煤气泄漏等特有因素的影响,建立了一种适宜煤炭地下气化过程的计算模型.应用模型对华亭地下气化现场实验进行模拟计算,并与实测数据对比分析,结果表明,绝大部分理论计算值与现场实测值的相对误差在5%以内,准确度较高.该模型可以用于地下气化项目的前期研究,为相关工艺参数的设计和选择提供参考.
This paper builds a new calculation model adapted for underground coal gasification(UCG)process,which is based on comprehensive calculation method that divides the UCG process into carbonization and gasification,combines with the related theories of calculation method of reaction equilibrium,introduces the equilibrium constant equations of CO2 reduction and the reaction of carbon with steam,and considers the particularly factors influence of UCG process including methane emission,groundwater permeation,mining rate of working face,gasifier drainage,heat transfer of surrounding rock and gas leakage.The model is used for simulating calculation of Huating UCG field experiments,and the results are compared with measured data,which reflect the vast majority of relative errors between the theoretical value and measured value are less than 5%,showing high accuracy.This model could be used for prophase research of UCG projects,to provide scientific reference for design and selection of relevant technological parameters.
This paper builds a new calculation model adapted for underground coal gasification(UCG)process,which is based on comprehensive calculation method that divides the UCG process into carbonization and gasification,combines with the related theories of calculation method of reaction equilibrium,introduces the equilibrium constant equations of CO2 reduction and the reaction of carbon with steam,and considers the particularly factors influence of UCG process including methane emission,groundwater permeation,mining rate of working face,gasifier drainage,heat transfer of surrounding rock and gas leakage.The model is used for simulating calculation of Huating UCG field experiments,and the results are compared with measured data,which reflect the vast majority of relative errors between the theoretical value and measured value are less than 5%,showing high accuracy.This model could be used for prophase research of UCG projects,to provide scientific reference for design and selection of relevant technological parameters.
引文
[1]黄温钢,王作棠,辛林.从低碳经济看我国煤炭地下气化的前景[J].矿业研究与开发,2012,32(2):32-36.HUANG Wen’gang,WANG Zuotang,XIN Lin.On the Prospect of Underground Coal Gasification in China from Low-carbon Economy[J].Mining Research and Development,2012,32(2):32-36.
[2]邬纫云.煤炭气化[M].徐州:中国矿业大学出版社,1989:91.
[3]杨兰和,梁杰.缓倾斜煤层反向两阶段煤炭地下气化模型实验[J].重庆大学学报,2003,26(2):47-50.YANG Lanhe,LIANG Jie.Model Test Two-stage Underground Coal Gasification in Counter Directions with Gently Inclined Coal Seam[J].Journal of Chongqing University,2003,26(2):47-50.
[4]刘淑琴,梁杰,常建,等.华亭煤纯氧-水蒸气地下气化模型试验研究[J].东南大学学报(自然科学版),2003,33(3):355-358.LIU Shuqin,LIANG Jie,CHANG Jian,et al.UCG Model Test of Huating Coal with Oxygen-steam as Gasification Agent[J].Journal of Southeast University(Natural Science Edition),2003,33(3):355-358.
[5]梁杰,刘淑琴,赵丽梅,等.太原东山煤地下气化模型试验研究[J].燃料化学学报,2004,32(1):12-17.LIANG Jie,LIU Shuqin,ZHAO Limei,et al.Study on Underground Gasification Model Test of Dongshan Coal[J].Journal of Fuel Chemistry and Technology,2004,32(1):12-17.
[6]闻全,梁杰,钱路新,等.新河煤层地下气化模型试验研究[J].煤炭转化,2005,28(4):11-16.WEN Quan,LIANG Jie,QIAN Luxin,et al.Study on Model Test for Underground Gasification of Xinhe Coal[J].Coal Conversion,2005,28(4):11-16.
[7]梁杰,张彦春,魏传玉,等.昔阳无烟煤地下气化模型试验研究[J].中国矿业大学学报,2006,35(1):25-28.LIANG Jie,ZHANG Yanchun,WEI Chuanyu,et al.Experiment Research on Underground Coal Gasification of Xiyang Anthracite[J].Journal of China University of Mining and Technology,2006,35(1):25-28.
[8]梁杰,席建奋,孙加亮,等.鄂庄薄煤层富氧地下气化模型试验[J].煤炭学报,2007,32(10):1031-1035.LIANG Jie,XI Jianfen,SUN Jialiang,et al.Experiment on Underground Coal Gasification of the Thin Coal Seam in Ezhuang[J].Journal of China Coal Society,2007,32(10):1031-1035.
[9]李文军,刘丽丽,梁新星,等.褐煤地下气化特性的实验研究[J].煤炭转化,2009,32(1):20-24.LI Wenjun,LIU Lili,LIANG Xinxing,et al.Experimental Study on the Characteristics for Underground Gasification of Lignite[J].Coal Conversion,2009,32(1):20-24.
[10]王作棠,王建华,张朋,等.华亭煤地下气化与固定床气化指标对比研究[J].煤炭工程,2013(1):99-101.WANG Zuotang,WANG Jianhua,ZHANG Peng,et al.Study on Index Comparison Between Underground Coal Gasification in Huating Mine and Fixed Bed Coal Gasification[J].Coal Engineering,2013(1):99-101.
[11]段天宏.煤炭地下气化的热解模型实验及气化指标研究[D].徐州:中国矿业大学,2014:60-71.DUAN Tianhong.Study on Pyrolysis Model Experiments and Gasification Indexes of Underground Coal Gasification[D].Xuzhou:China University of Mining and Technology,2014:60-71.
[12]杨兰和.煤炭地下气化"三带"特征及影响变量的研究[J].南京理工大学学报,2001,25(5):533-537.YANG Lanhe.Characteristics of“Three Zones”in Underground Coal Gasification and Its Study of Influence Variables[J].Journal of Nanjing University of Science and Technology,2001,25(5):533-537.
[13]梁新星,金国荣,梁杰.灰渣对煤炭地下气化催化效果的初步研究[J].煤炭转化,2008,31(1):21-25.LIANG Xinxing,JIN Guorong,LIANG Jie.Pilot Study on the Catalysis of Residues on Underground Coal Gasification[J].Coal Conversion,2008,31(1):21-25.
[14]梁杰,朗庆田,余力,等.缓倾斜薄煤层地下气化试验研究[J].煤炭学报,2003,28(2):126-130.LIANG Jie,LANG Qingtian,YU Li,et al.Study on Underground Gasification Test of Gently Inclined Thin Seam[J].Journal of China Coal Society,2003,28(2):126-130.
[15]黄温钢.残留煤地下气化综合评价与稳定生产技术研究[D].徐州:中国矿业大学,2014:180-192.HUANG Wengang.Study on Comprehensive Evaluation and Stable Production Technology for Underground Gasification of Residual Coal[D].Xuzhou:China University of Mining and Technology,2014:180-192.
[2]邬纫云.煤炭气化[M].徐州:中国矿业大学出版社,1989:91.
[3]杨兰和,梁杰.缓倾斜煤层反向两阶段煤炭地下气化模型实验[J].重庆大学学报,2003,26(2):47-50.YANG Lanhe,LIANG Jie.Model Test Two-stage Underground Coal Gasification in Counter Directions with Gently Inclined Coal Seam[J].Journal of Chongqing University,2003,26(2):47-50.
[4]刘淑琴,梁杰,常建,等.华亭煤纯氧-水蒸气地下气化模型试验研究[J].东南大学学报(自然科学版),2003,33(3):355-358.LIU Shuqin,LIANG Jie,CHANG Jian,et al.UCG Model Test of Huating Coal with Oxygen-steam as Gasification Agent[J].Journal of Southeast University(Natural Science Edition),2003,33(3):355-358.
[5]梁杰,刘淑琴,赵丽梅,等.太原东山煤地下气化模型试验研究[J].燃料化学学报,2004,32(1):12-17.LIANG Jie,LIU Shuqin,ZHAO Limei,et al.Study on Underground Gasification Model Test of Dongshan Coal[J].Journal of Fuel Chemistry and Technology,2004,32(1):12-17.
[6]闻全,梁杰,钱路新,等.新河煤层地下气化模型试验研究[J].煤炭转化,2005,28(4):11-16.WEN Quan,LIANG Jie,QIAN Luxin,et al.Study on Model Test for Underground Gasification of Xinhe Coal[J].Coal Conversion,2005,28(4):11-16.
[7]梁杰,张彦春,魏传玉,等.昔阳无烟煤地下气化模型试验研究[J].中国矿业大学学报,2006,35(1):25-28.LIANG Jie,ZHANG Yanchun,WEI Chuanyu,et al.Experiment Research on Underground Coal Gasification of Xiyang Anthracite[J].Journal of China University of Mining and Technology,2006,35(1):25-28.
[8]梁杰,席建奋,孙加亮,等.鄂庄薄煤层富氧地下气化模型试验[J].煤炭学报,2007,32(10):1031-1035.LIANG Jie,XI Jianfen,SUN Jialiang,et al.Experiment on Underground Coal Gasification of the Thin Coal Seam in Ezhuang[J].Journal of China Coal Society,2007,32(10):1031-1035.
[9]李文军,刘丽丽,梁新星,等.褐煤地下气化特性的实验研究[J].煤炭转化,2009,32(1):20-24.LI Wenjun,LIU Lili,LIANG Xinxing,et al.Experimental Study on the Characteristics for Underground Gasification of Lignite[J].Coal Conversion,2009,32(1):20-24.
[10]王作棠,王建华,张朋,等.华亭煤地下气化与固定床气化指标对比研究[J].煤炭工程,2013(1):99-101.WANG Zuotang,WANG Jianhua,ZHANG Peng,et al.Study on Index Comparison Between Underground Coal Gasification in Huating Mine and Fixed Bed Coal Gasification[J].Coal Engineering,2013(1):99-101.
[11]段天宏.煤炭地下气化的热解模型实验及气化指标研究[D].徐州:中国矿业大学,2014:60-71.DUAN Tianhong.Study on Pyrolysis Model Experiments and Gasification Indexes of Underground Coal Gasification[D].Xuzhou:China University of Mining and Technology,2014:60-71.
[12]杨兰和.煤炭地下气化"三带"特征及影响变量的研究[J].南京理工大学学报,2001,25(5):533-537.YANG Lanhe.Characteristics of“Three Zones”in Underground Coal Gasification and Its Study of Influence Variables[J].Journal of Nanjing University of Science and Technology,2001,25(5):533-537.
[13]梁新星,金国荣,梁杰.灰渣对煤炭地下气化催化效果的初步研究[J].煤炭转化,2008,31(1):21-25.LIANG Xinxing,JIN Guorong,LIANG Jie.Pilot Study on the Catalysis of Residues on Underground Coal Gasification[J].Coal Conversion,2008,31(1):21-25.
[14]梁杰,朗庆田,余力,等.缓倾斜薄煤层地下气化试验研究[J].煤炭学报,2003,28(2):126-130.LIANG Jie,LANG Qingtian,YU Li,et al.Study on Underground Gasification Test of Gently Inclined Thin Seam[J].Journal of China Coal Society,2003,28(2):126-130.
[15]黄温钢.残留煤地下气化综合评价与稳定生产技术研究[D].徐州:中国矿业大学,2014:180-192.HUANG Wengang.Study on Comprehensive Evaluation and Stable Production Technology for Underground Gasification of Residual Coal[D].Xuzhou:China University of Mining and Technology,2014:180-192.