不同水分褐煤快速热解试验研究
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摘要
为考察水分对褐煤热解特性的影响,采用神雾自主研发的蓄热式下行床快速热解试验装置,研究了不同水分印尼褐煤的热解特性。结果表明,随着印尼褐煤水分的增加,热解气产率逐渐升高,水分为24.01%时达到最大值45.40%,热解气中H2和CO2含量增加,CH4和CO含量降低;热解焦油产率呈下降趋势,其中轻质组分含量不断增加,水分为24.01%时达到最大值69.30%;热解水产率逐渐升高,水分为24.01%时,热解水产率为10.60%;半焦产率逐渐降低,水分从5.60%升高至24.01%时,半焦产率从56.20%降至42.50%,半焦热值无明显变化规律。热解能耗逐渐升高,水分从5.6%升高至24.01%时,热解能耗从1.77 MJ/kg升至3.26 MJ/kg。
In order to study the effect of moisture on pyrolysis characteristics of lignite,the pyrolysis experiment of Indonesia lignite with different moisture contents were carried out on the Shenwu regenerative flash pyrolysis furnace.Results show that as the increase of moisture contents of lignite,the pyrolysis gas yield increases gradually,the content of H2 and CO2 in the pyrolysis gas increase,and the contents of CH4 and CO decrease.When the moisture content was 24.01%,the pyrolysis gas yield reaches the maximum value of 45. 40%. As the increase of moisture contents of lignite,tar yield decreases gradually,the light components in tar increase and reach the maximum 69. 30%,When the moisture content is 24. 01%.The pyrolysis wateryield increases gradually,and when the moisture content is 24. 01%,the pyrolysis wateryield is 10. 60%. When the moisture contents of lignite increases from 5. 60% to 24. 01%,the yield of thechar decreases from56. 20% to 42. 50%,and the change on calorific value of char is not obvious. Pyrolysis energy consumption gradually increases,and when moisture contents increased from 5. 60% to 24. 01%,energy consumption increases from 1.77 MJ/kg to 3.26 MJ/kg.
In order to study the effect of moisture on pyrolysis characteristics of lignite,the pyrolysis experiment of Indonesia lignite with different moisture contents were carried out on the Shenwu regenerative flash pyrolysis furnace.Results show that as the increase of moisture contents of lignite,the pyrolysis gas yield increases gradually,the content of H2 and CO2 in the pyrolysis gas increase,and the contents of CH4 and CO decrease.When the moisture content was 24.01%,the pyrolysis gas yield reaches the maximum value of 45. 40%. As the increase of moisture contents of lignite,tar yield decreases gradually,the light components in tar increase and reach the maximum 69. 30%,When the moisture content is 24. 01%.The pyrolysis wateryield increases gradually,and when the moisture content is 24. 01%,the pyrolysis wateryield is 10. 60%. When the moisture contents of lignite increases from 5. 60% to 24. 01%,the yield of thechar decreases from56. 20% to 42. 50%,and the change on calorific value of char is not obvious. Pyrolysis energy consumption gradually increases,and when moisture contents increased from 5. 60% to 24. 01%,energy consumption increases from 1.77 MJ/kg to 3.26 MJ/kg.
引文
[1]熊志波,韩奎华,高攀,等.褐煤再燃/先进再燃脱硝特性[J].煤炭学报,2011,36(9):1543-1548.XIONG Zhibo,HAN Kuihua,GAO Pan,et al.Experimental study of NO reduction through reburning/advanced reburning of lignite[J].Journal of China Coal Society,2011,36(9):1543-1548.
[2]BOSOAGA A,PANOIU N,MIHAESCU L,et al.The combustion of pulverized low grade lignite[J].Fuel,2006,85(10/11):1591-1598.
[3]胡二峰,张纯,武荣成,等.内构件固定床反应器中不同水分煤的热解特性[J].化工学报,2015,66(7):2656-2663.HU Erfeng,ZHANG Chun,WU Rongcheng,et al.Pyrolysis of coal with different moisture contents in fixed-bed reactor with internals[J].CIESC Journal,2015,66(7):2656-2663.
[4]CUI L,LIN W,YAO J.Influences of temperature and coal particle size on the flash pyrolysis of coal in a fast-entrained bed[J].Chemical Research in Chinese Universities,2006,22(1):103-110.
[5]ZHU W,SONG W,LIN W.Effect of the coal particle size on pyrolysis and char reactivity for two types of coal and demineralized coal[J].Energy&Fuels,2008,22(4):2482-2487.
[6]WALL T F,LIU G,WU H,et al.The effects of pressure on coal reactions during pulverised coal combustion and gasification[J].Progress in Energy and Combustion Science,2002,28(5):405-433.
[7]杨景标,蔡宁生,张彦文.金属催化剂对褐煤热解气体产物析出影响的实验研究[J].工程热物理学报,2009,30(1):161-164.YANG Jingbiao,CAI Ningsheng,ZHANG Yanwen.Experimental study for the effectof catalysis on the release of gaseous products during pyrolysis of lignite[J].Journal of Engineering Thermophusics,2009,30(1):161-164.
[8]刘明强,刘建忠,王睿坤,等.热解温度对褐煤半焦成浆特性影响的实验研究[J].中国电机工程学报,2013,33(8):36-43.LIU Mingqiang,LIU Jianzhong,WANG Ruikun,et al.Effects of pyrolysistemperature on slurry ability of lignite semi-coke[J].Proceeding of the CSEE,2013,33(8):36-43.
[9]CHANG Na.Study on the effects of heating rate and temperature to coal pyrolysis[J].Coal Conversions,2012,35(3):1-5.
[10]TOMITA A,WATABABE Y,TAKARADA T,et al.Nickel-catalysed gasification of brown coal in a fluidized bed reactor at atmospheric pressure[J].Fuel,1985,64(6):795-800.
[11]李春柱.维多利亚褐煤科学进展[M].北京:化学工业出版社,2009:174-176.
[12]WANG J,SANKANISHI K,SAITO I.High-yield hydrogen production by steam gasification of hypercoal(ash-free coal extract)with potassium carbonate:Comparison with raw coal[J].Energy&Fuels,2005,19:2114-2120.
[13]WANG J,JIANG M,YAO Y,et al.Steam gasification of coal char catalyzed by K2CO3for enhanced production of hydrogen without formation of methane[J].Fuel,2009,88:1572-1579.
[14]郭树才.煤化工工艺学[M].2版.北京:化学工业出版社,2006:11-12.
[15]王芳杰,任浩华,王永刚,等.胜利褐煤热解/气化焦油生成及转化规律[J].煤炭科学技术,2016,44(S1):189-193.WANG Fangjie,REN Haohua,WANG Yonggang,et al.Formation and transformation law of tar during pyrolysis and gasification of Shengli brown coal[J].Coal Science and Technology,2016,44(S1):189-193.
[16]刘训良,曹欢,王淦,等.煤颗粒热解的传热传质分析[J].计算物理,2014,31(1):59-66.LIU Xunliang,CAO Huan,WANG Gan,et al.Numerical analysis of heat and masstransfer during pyrolysis of coal prticle[J].Chinese Journalof Computational Physics,2014,31(1):59-66.
[2]BOSOAGA A,PANOIU N,MIHAESCU L,et al.The combustion of pulverized low grade lignite[J].Fuel,2006,85(10/11):1591-1598.
[3]胡二峰,张纯,武荣成,等.内构件固定床反应器中不同水分煤的热解特性[J].化工学报,2015,66(7):2656-2663.HU Erfeng,ZHANG Chun,WU Rongcheng,et al.Pyrolysis of coal with different moisture contents in fixed-bed reactor with internals[J].CIESC Journal,2015,66(7):2656-2663.
[4]CUI L,LIN W,YAO J.Influences of temperature and coal particle size on the flash pyrolysis of coal in a fast-entrained bed[J].Chemical Research in Chinese Universities,2006,22(1):103-110.
[5]ZHU W,SONG W,LIN W.Effect of the coal particle size on pyrolysis and char reactivity for two types of coal and demineralized coal[J].Energy&Fuels,2008,22(4):2482-2487.
[6]WALL T F,LIU G,WU H,et al.The effects of pressure on coal reactions during pulverised coal combustion and gasification[J].Progress in Energy and Combustion Science,2002,28(5):405-433.
[7]杨景标,蔡宁生,张彦文.金属催化剂对褐煤热解气体产物析出影响的实验研究[J].工程热物理学报,2009,30(1):161-164.YANG Jingbiao,CAI Ningsheng,ZHANG Yanwen.Experimental study for the effectof catalysis on the release of gaseous products during pyrolysis of lignite[J].Journal of Engineering Thermophusics,2009,30(1):161-164.
[8]刘明强,刘建忠,王睿坤,等.热解温度对褐煤半焦成浆特性影响的实验研究[J].中国电机工程学报,2013,33(8):36-43.LIU Mingqiang,LIU Jianzhong,WANG Ruikun,et al.Effects of pyrolysistemperature on slurry ability of lignite semi-coke[J].Proceeding of the CSEE,2013,33(8):36-43.
[9]CHANG Na.Study on the effects of heating rate and temperature to coal pyrolysis[J].Coal Conversions,2012,35(3):1-5.
[10]TOMITA A,WATABABE Y,TAKARADA T,et al.Nickel-catalysed gasification of brown coal in a fluidized bed reactor at atmospheric pressure[J].Fuel,1985,64(6):795-800.
[11]李春柱.维多利亚褐煤科学进展[M].北京:化学工业出版社,2009:174-176.
[12]WANG J,SANKANISHI K,SAITO I.High-yield hydrogen production by steam gasification of hypercoal(ash-free coal extract)with potassium carbonate:Comparison with raw coal[J].Energy&Fuels,2005,19:2114-2120.
[13]WANG J,JIANG M,YAO Y,et al.Steam gasification of coal char catalyzed by K2CO3for enhanced production of hydrogen without formation of methane[J].Fuel,2009,88:1572-1579.
[14]郭树才.煤化工工艺学[M].2版.北京:化学工业出版社,2006:11-12.
[15]王芳杰,任浩华,王永刚,等.胜利褐煤热解/气化焦油生成及转化规律[J].煤炭科学技术,2016,44(S1):189-193.WANG Fangjie,REN Haohua,WANG Yonggang,et al.Formation and transformation law of tar during pyrolysis and gasification of Shengli brown coal[J].Coal Science and Technology,2016,44(S1):189-193.
[16]刘训良,曹欢,王淦,等.煤颗粒热解的传热传质分析[J].计算物理,2014,31(1):59-66.LIU Xunliang,CAO Huan,WANG Gan,et al.Numerical analysis of heat and masstransfer during pyrolysis of coal prticle[J].Chinese Journalof Computational Physics,2014,31(1):59-66.