掺配BDO焦油水煤浆燃烧性能及动力学分析
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摘要
利用热重分析法研究了掺配BDO焦油水煤浆的燃烧性能及燃烧反应动力学,并结合XRD和SEM-EDX分析了掺配BDO焦油对水煤浆燃烧性能的影响。结果表明:浆体失重过程主要分为三个阶段,在第二阶段由于BDO焦油中大部分组分失重,随着掺配BDO焦油质量分数的增加,失重速率增大;在第三阶段TG曲线向低温区偏移,说明掺配BDO焦油促进了浆体燃烧。由于BDO焦油中Na~+在煤颗粒的表面、边缘和煤颗粒之间形成燃烧的活化中心,使得掺配BDO焦油浆体的(dw/dt)_(mean)和R_w等燃烧性能参数均优于原煤水煤浆的相应燃烧性能参数;在选取Coats-Redfern近似时,水煤浆燃烧在选取反应级数n=1时线性相关性最高,掺配BDO焦油的浆体表观活化能均低于原煤浆体的表观活化能,频率因子均大于原煤浆体的频率因子。
The combustion performance and reaction kinetics of coal water slurry(CWS)by mixing BDO tar were studied by the thermogravimetric analysis,XRD and SEM-EDX analysis.The results show that the slurry has three weight loss peaks in the combustion process.In the second stage,due to the weight loss of most of the components in BDO tar,the rate of weight loss increases with the increase of mass fraction of BDO tar blended.The TG curve shifts to the low temperature zone in the third stage,indicating that the blending of BDO tar promots slurry burning.Due to the Na~+ in the BDO tar forms the activation center of combustion in the surface,edge of the coal particles and among coal particles,(dw/dt)_(mean),R_w and other combustion performance parameters of the CWS blended with BDO tar are better than that of the original coal water slurry.When the Coats-Redfern approximation is selected,the linear correlation is highest when the CWS combustion selects the reaction order n=1.The apparent activation energy of the slurry blended with BDO tar is lower than that of the original CWS,and the frequency factor is greater than that of the original CWS.
The combustion performance and reaction kinetics of coal water slurry(CWS)by mixing BDO tar were studied by the thermogravimetric analysis,XRD and SEM-EDX analysis.The results show that the slurry has three weight loss peaks in the combustion process.In the second stage,due to the weight loss of most of the components in BDO tar,the rate of weight loss increases with the increase of mass fraction of BDO tar blended.The TG curve shifts to the low temperature zone in the third stage,indicating that the blending of BDO tar promots slurry burning.Due to the Na~+ in the BDO tar forms the activation center of combustion in the surface,edge of the coal particles and among coal particles,(dw/dt)_(mean),R_w and other combustion performance parameters of the CWS blended with BDO tar are better than that of the original coal water slurry.When the Coats-Redfern approximation is selected,the linear correlation is highest when the CWS combustion selects the reaction order n=1.The apparent activation energy of the slurry blended with BDO tar is lower than that of the original CWS,and the frequency factor is greater than that of the original CWS.
引文
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[2]屈战成.BDO与PTMEG生产中废液循环利用关键技术研究[J].中氮肥,2018(4):44-47.QU Zhancheng.Research on Key Technologies of Waste Liquid Recycling in BDO and PTMEG Production[J].M-sized Nitrogenous Fertilizer Progress,2018(4):44-47.
[3]高星.BDO高浓度废水处理装置优化及工业化应用[D].北京:北京化工大学,2017.GAO Xing.Optimization and Industrialization of BDO High Concentration Wastewater Treatment Plant[D].Beijing:Beijing University of Chemical Technology,2017.
[4]张瑜,林益安,曾梅,等.湿法料浆制浆原料多元化研究与开发[J].煤化工,2017,45(2):71-74.ZHANG Yu,LIN Yian,ZENG Mei,et al.Diversification Study and Development Status on the Pulping Raw Materrial of Wet Slurry[J].Coal Chemical Industry,2017,45(2):71-74.
[5]JONG Won Kim,LALVANI S B,AKASH B A,et al.Coliquefaction of Coal and Black Liquor[J].Korean Journal of Chemical Engineering,1996,12(5):582-585.
[6]BERGLIN N,BERNTSSON T.CHP in the Pulp Industry Using Black Liquor Gasification:Thermodynamic Analysis[J].Applied Thermal Engineering,1998,18(11):947-961.
[7]李仁军.利用高浓度废水制备水煤浆联产合成氨技术在公司的运用[J].中国盐业,2017(20):52-53.LI Renjun.Application of High-concentration Wastewater to Prepare Coal-water Slurry for Co-production of Ammonia in the Company[J].China Salt Industry,2017(20):52-53.
[8]张炳雷.生物质水煤浆技术在棕榈油生产废液治理中的应用[J].中国科技信息,2013(1):43.ZHANG Binglei.Application of Biomass Coal Water Slurry Technology in Treatment of Waste Oil from Palm Oil Production[J].China Science and Technology Information,2013(1):43.
[9]杜奇迹.水煤浆技术用于处理有机废液的研究[J].能源与节能,2014(9):189-190.DU Qiji.Study on Coal-water Slurry Technoloy for Treatment of Organic Waste Water[J].Energy and Energy Conservation,2014(9):189-190.
[10]郝华东.腈纶废水制水煤浆的成浆性能研究[D].淮南:安徽理工大学,2017.HAO Huadong.Study on Property of CWS by Acrylic Fiber Wastewater[D].Huainan:Anhui University of Science and Technology,2017.
[11]张静,尚庆雨,王国房,等.印染废水制备水煤浆试验研究[J].煤化工,2017,45(3):69-72.ZHANG Jing,SHANG Qingyu,WANG Guofang,et al.Experimental Study on Preparation of Coal Water Slurry by Printing and Dyeing Wastewater[J].Coal Chemical Industry,2017,45(3):69-72.
[12]周俊虎,匡建平,周志军,等.黑液水煤浆焦与普通水煤浆焦CO2催化气化反应特性研究[J].中国电机工程学报,2006,26(12):149-155.ZHOU Junhu,KUANG Jianping,ZHOU Zhijun,et al.Research on Alkali-catalysed CO2-gasification of Coal Black Liquor Slurry Char and Coal Water Slurry Char[J].Proceedings of the CSEE,2006,26(12):149-155.
[13]尚庆雨.工业废弃物水煤浆的燃烧特性研究[J].洁净煤技术,2013,19(2):78-80.SHANG Qingyu.Combustion Characteristics of Coal Water Mixture Prepared from Industrial Water[J].Clean Coal Technology,2013,19(2):78-80.
[14]向轶.油田废水制备浆体燃料的成浆、燃烧与气化特性研究[D].杭州:浙江大学,2017.XIANG Yi.Research on Slurryability,Combustion and Gasification Properties of Coal-oilfield Wastewater-slurry[D].Hangzhou:Zhejiang University,2017.
[15]兰泽全,曹欣玉,刘建忠,等.造纸黑液对水煤浆燃烧性能的影响及分析[J].中国造纸学报,2008,23(3):42-46.LAN Zequan,CAO Xinyu,LIU Jianzhong,et al.Effect of Black Liquor on Combustion Performance of Black Liquor Coal Slurry[J].Transactions of China Pulp and Paper,2008,23(3):42-46.
[16]向轶,庞德新,周建平,等.油田废液煤浆的燃烧特性及反应动力学分析[J].热能动力工程,2016,31(7):86-91.XIANG Yi,PANG Dexin,ZHOU Jianping,et al.Combustion Characteristics of Coal Slurry in the Waste Liquid in Oil Fields and Their Reaction Kinetic Analysis[J].Journal of Engineering for Thermal Energy and Power,2016,31(7):86-91.
[17]魏砾宏,齐弟,李润东.碱金属对煤燃烧特性的影响及动力学分析[J].煤炭学报,2010,35(10):1706-1711.WEI Lihong,QI Di,LI Ruidong.Effect of Alkali Metal on Combusion of Pulverized Coal and Kinetic Analysis[J].Journal of China Coal Society,2010,35(10):1706-1711.