稻杆与褐煤共热解转化效能研究
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摘要
利用Aspen Plus化工流程模拟软件建立了生物质与煤共热解工艺模型。把共热解过程分为干燥、热解、分离三个单元,结合共热解实验产率数据,用Aspen Plus软件对复杂的热解过程进行黑箱化处理。计算出反应热,依次对三个单元进行能量衡算,对系统能量转化效率进行评价。结果表明:生物质添加比为20%(质量分数,下同)时焦油产率最高,为12.08%,与褐煤单独热解时的焦油产率相比提高了40.45%;模拟计算结果表明,热解单元是系统的主要能耗单元,占系统总能耗的55.39%,通过灵敏度分析得到干燥单元能耗随褐煤含水量增加而近似直线增加,系统能量转化效率为74.48%,可通过回收热解气和水蒸气的显热以及在热解前对褐煤进行干燥处理来提高系统的能量效率。
The simulation process of biomass and lignite co-pyrolysis was established based on Aspen Plus.To achieve the simulation,the co-pyrolysis was divided into three units:drying,pyrolysis and separation.Evaluation of the energy conversion efficiency of the system was based on the energy balance of these three units combined with experiment data.The experimental results show that the tar yield reaches the highest when the biomass addition ratio is 20%(mass fraction,the same below),which is 12.08%,increasing 40.45% compared to lignite pyrolysis alone.The simulation results indicate that the pyrolysis unit is the main energy consumption unit of the system,accounting for 55.39%,and the system energy conversion efficiency is 74.48%.The energy consumption of drying unit increases nearly linearly with the water content of lignite according to the sensitivity analysis.The recycle of the sensible heat of pyrolysis gas and steam could be an effective way to increase the energy efficiency of the system.
The simulation process of biomass and lignite co-pyrolysis was established based on Aspen Plus.To achieve the simulation,the co-pyrolysis was divided into three units:drying,pyrolysis and separation.Evaluation of the energy conversion efficiency of the system was based on the energy balance of these three units combined with experiment data.The experimental results show that the tar yield reaches the highest when the biomass addition ratio is 20%(mass fraction,the same below),which is 12.08%,increasing 40.45% compared to lignite pyrolysis alone.The simulation results indicate that the pyrolysis unit is the main energy consumption unit of the system,accounting for 55.39%,and the system energy conversion efficiency is 74.48%.The energy consumption of drying unit increases nearly linearly with the water content of lignite according to the sensitivity analysis.The recycle of the sensible heat of pyrolysis gas and steam could be an effective way to increase the energy efficiency of the system.
引文
[1]潘根兴,李恋卿,刘晓雨,等.热裂解生物质炭产业化:秸秆禁烧与绿色农业新途径[J].科技导报,2015,33(13):92-101.PAN Genxing,LI Lianqing,LIU Xiaoyu,et al.Industrialization of Biochar from Biomass Pyrolysis:a New Option for Straw Burning Ban and Green Agriculture of China[J].Technology Review,2015,33(13):92-101.
[2]王南,余江龙,ARASH Tahmasebi,et al.煤与生物质微波共热解特性实验研究[J].煤炭转化,2015,38(4):27-32.WANG Nan,YU Jianglong,ARASH Tahmasebi,et al.Experimental Study on Microwave Co-pyrolysis of Biomass and Lignite[J].Coal Conversion,2015,38(4):27-32.
[3]易霜,何选明,程晓晗,等.褐煤与石莼低温共热解产物特性研究[J].化学工程,2016,44(7):64-68.YI Shuang,HE Xuanming,CHENG Xiaohan,et al.Low Temperature Co-pyrolysis Products of Lignite and Ulva[J].Chemical Engineering,2016,44(7):64-68.
[4]高怀.化工过程模拟在工业生产中的应用[J].煤炭与化工,2017,40(3):138-140.GAO Huai.Application of Chemical Process Simulation in Industrial Production[J].Coal and Chemical Engineering,2017,40(3):138-140.
[5]ZHANG Guoqiang,XU Wenlong,WANG Xiuyan,et al.Sensitivity Analysis and Optimization of a Coal-fired Power Plant in Different Modes of Flue Gas Recirculation[J].Energy Procedia,2014,61:2114-2117.
[6]王伟,商玉坤,武建军.基于Aspen Plus的褐煤热解过程模拟[J].化学工业与工程,2011,28(3):49-53.WANG Wei,SHANG Yukun,WU Jianjun.The Lignite Coal Pyrolysis Process Simulation Based on Aspen Plus[J].Chemical Industry and Engineering,2011,28(3):49-53.
[7]路丙川.褐煤固体热载体热解-气化耦合工艺模拟研究及评价[D].太原:太原理工大学,2013.LU Bingchuan.Simulation and Evalution of Lignite Pyrolysis by Solid Heat Carrier Coupled with Gasification[D].Taiyuan:Taiyuan University of Technology,2013.
[8]RAJUL Nayak,RAJU K Mewada.Simulation of Coal Gasification Process Using ASPEN PLUS[J].Institute of Technology,Nirma Uinversity,Ahmedadad,2011.
[9]刘娜,黄雪莉.基于Aspen Plus的煤干燥过程模拟计算[J].煤炭转化,2013,36(1):65-67.LIU Na,HUANG Xueli.Simulation and Calulation for Coal Drying Process by Aspen Plus[J].Coal Conversion,2013,36(1):65-67.
[10]何选明.煤化学[M].北京:冶金工业出版社,2010.HE Xuanming.Coal Chemistry[M].Beijing:Metallurgical Industry Press,2010.
[11]刘钦甫,崔晓南,徐占杰,等.煤热解气体主产物及热解动力学分析[J].煤田地质与勘探,2016,44(6):27-32.LIU Qinfu,CUI Xiaonan,XU Zhanjie,et al.Main Gases and Kinetics of Coal Pyrolysis[J].Coal Geology and Exploration,2016,44(6):27-32.
[12]凌鹏,刘亮,刘成,等.垃圾衍生燃料与褐煤共热解特性及动力学模型比较[J].煤炭转化,2017,40(4):6-12.LING Peng,LIU Liang,LIU Cheng,et al.Co-pyrolysis Characteristics of Refuse Derived Fuel and Lignite and Its Kinetic Parameters with Different Methods[J].Coal Conversion,2017,40(4):6-12.
[13]张晓光,苏丽,王志欣,等.利用Aspen Plus对粉煤气化与水煤浆气化过程的模拟分析[J].石油化工应用,2014,33(12):98-100.ZHANG Xiaoguang,SU Li,WANG Zhixin,et al.Simulation and Analysis of the Powdered Coal and Coal Water Slurry Gasification Based on Aspen Plus[J].Petrochemical Industry Application,2014,33(12):98-100.
[14]Aspen Technology,Inc.Getting Started Modeling Processes with Solids[R].Burlington:Aspen Technology Incorporated,2010.
[15]周春平,甘丹,严应群.基于Aspen Plus软件的磨煤干燥过程模拟与分析[J].化工设计通讯,2014,40(5):30-32.ZHOU Chunping,GAN Dan,YAN Yingqun.Simulation and Analysis of the Coal Grinding and Drying Process with the Aspen Plus Software[J].Chemical Engineering Design Communications,2014,40(5):30-32.
[16]孙兰义.化工过程模拟实训:Aspen Plus教程[M].北京:化学工业出版社,2012.SUN Lanyi.Chemical Process Simulation Training:Aspen Plus Tutorial[M].Beijing:Chemical Industry Press,2012.
[17]张彦,赵月红,何险峰.基于Aspen Plus的“煤拔头”工艺热解过程的模拟[J].计算机与应用化学,2014,31(7):774-778.ZHANG Yan,ZHAO Yuehong,HE Xianfeng.The Pyrolysis Process of Coal Topping Simulation Using Aspen Plus[J].Computers and Applied Chemistry,2014,31(7):774-778.
[2]王南,余江龙,ARASH Tahmasebi,et al.煤与生物质微波共热解特性实验研究[J].煤炭转化,2015,38(4):27-32.WANG Nan,YU Jianglong,ARASH Tahmasebi,et al.Experimental Study on Microwave Co-pyrolysis of Biomass and Lignite[J].Coal Conversion,2015,38(4):27-32.
[3]易霜,何选明,程晓晗,等.褐煤与石莼低温共热解产物特性研究[J].化学工程,2016,44(7):64-68.YI Shuang,HE Xuanming,CHENG Xiaohan,et al.Low Temperature Co-pyrolysis Products of Lignite and Ulva[J].Chemical Engineering,2016,44(7):64-68.
[4]高怀.化工过程模拟在工业生产中的应用[J].煤炭与化工,2017,40(3):138-140.GAO Huai.Application of Chemical Process Simulation in Industrial Production[J].Coal and Chemical Engineering,2017,40(3):138-140.
[5]ZHANG Guoqiang,XU Wenlong,WANG Xiuyan,et al.Sensitivity Analysis and Optimization of a Coal-fired Power Plant in Different Modes of Flue Gas Recirculation[J].Energy Procedia,2014,61:2114-2117.
[6]王伟,商玉坤,武建军.基于Aspen Plus的褐煤热解过程模拟[J].化学工业与工程,2011,28(3):49-53.WANG Wei,SHANG Yukun,WU Jianjun.The Lignite Coal Pyrolysis Process Simulation Based on Aspen Plus[J].Chemical Industry and Engineering,2011,28(3):49-53.
[7]路丙川.褐煤固体热载体热解-气化耦合工艺模拟研究及评价[D].太原:太原理工大学,2013.LU Bingchuan.Simulation and Evalution of Lignite Pyrolysis by Solid Heat Carrier Coupled with Gasification[D].Taiyuan:Taiyuan University of Technology,2013.
[8]RAJUL Nayak,RAJU K Mewada.Simulation of Coal Gasification Process Using ASPEN PLUS[J].Institute of Technology,Nirma Uinversity,Ahmedadad,2011.
[9]刘娜,黄雪莉.基于Aspen Plus的煤干燥过程模拟计算[J].煤炭转化,2013,36(1):65-67.LIU Na,HUANG Xueli.Simulation and Calulation for Coal Drying Process by Aspen Plus[J].Coal Conversion,2013,36(1):65-67.
[10]何选明.煤化学[M].北京:冶金工业出版社,2010.HE Xuanming.Coal Chemistry[M].Beijing:Metallurgical Industry Press,2010.
[11]刘钦甫,崔晓南,徐占杰,等.煤热解气体主产物及热解动力学分析[J].煤田地质与勘探,2016,44(6):27-32.LIU Qinfu,CUI Xiaonan,XU Zhanjie,et al.Main Gases and Kinetics of Coal Pyrolysis[J].Coal Geology and Exploration,2016,44(6):27-32.
[12]凌鹏,刘亮,刘成,等.垃圾衍生燃料与褐煤共热解特性及动力学模型比较[J].煤炭转化,2017,40(4):6-12.LING Peng,LIU Liang,LIU Cheng,et al.Co-pyrolysis Characteristics of Refuse Derived Fuel and Lignite and Its Kinetic Parameters with Different Methods[J].Coal Conversion,2017,40(4):6-12.
[13]张晓光,苏丽,王志欣,等.利用Aspen Plus对粉煤气化与水煤浆气化过程的模拟分析[J].石油化工应用,2014,33(12):98-100.ZHANG Xiaoguang,SU Li,WANG Zhixin,et al.Simulation and Analysis of the Powdered Coal and Coal Water Slurry Gasification Based on Aspen Plus[J].Petrochemical Industry Application,2014,33(12):98-100.
[14]Aspen Technology,Inc.Getting Started Modeling Processes with Solids[R].Burlington:Aspen Technology Incorporated,2010.
[15]周春平,甘丹,严应群.基于Aspen Plus软件的磨煤干燥过程模拟与分析[J].化工设计通讯,2014,40(5):30-32.ZHOU Chunping,GAN Dan,YAN Yingqun.Simulation and Analysis of the Coal Grinding and Drying Process with the Aspen Plus Software[J].Chemical Engineering Design Communications,2014,40(5):30-32.
[16]孙兰义.化工过程模拟实训:Aspen Plus教程[M].北京:化学工业出版社,2012.SUN Lanyi.Chemical Process Simulation Training:Aspen Plus Tutorial[M].Beijing:Chemical Industry Press,2012.
[17]张彦,赵月红,何险峰.基于Aspen Plus的“煤拔头”工艺热解过程的模拟[J].计算机与应用化学,2014,31(7):774-778.ZHANG Yan,ZHAO Yuehong,HE Xianfeng.The Pyrolysis Process of Coal Topping Simulation Using Aspen Plus[J].Computers and Applied Chemistry,2014,31(7):774-778.