Co-pyrolysis characteristics and kinetic analysis of refuse derived fuel (RDF) blends sludge

doi:10.16085/j.issn.1000-6613.2017-0784

Abstract

Abstract: In this paper,the reaction kinetic and gas product characteristics of pyrolysis of refuse derived fuel(RDF),sludge and their mixture were studied by using thermogravimetric analysis-Fourier transform infrared spectrometer(TG-FTIR). The results showed that there was synergistic effect in the co-pyrolysis process of sludge and RDF. When the proportion of sludge is 50%,the whole pyrolysis process presented promotion effect,and the effect is the most obvious at the temperature range from 500℃ to 1000℃. The Coats-Redfern method was used to analyze the kinetic parameters of the pyrolysis process. The results indicated that the co-pyrolysis reaction of RDF and sludge in the low temperature stage(240-380℃)and high temperature stage(670-740℃)conforms to the second-order reaction law,while meets the first-order reaction law in the middle temperature stage (430-540℃). Compared with RDF pyrolysis,the activation energy of co-pyrolysis of RDF and sludge decreased obviously,which indicated that co-pyrolysis could promote the pyrolysis reaction process. FTIR analysis showed that the co-pyrolysis of RDF and sludge has little effect on the precipitation of CO₂ and CO,but promotes the production of CH₄. Meanwhile,the co-pyrolysis results in an increase in the precipitation of HCl,NH₃ and HCN as well. The results of this study could provide data support for the development and design of the co-pyrolysis process of RDF and sludge.

Key words: refuse derived fuel(RDF), sludge, TG-FTIR, pyrolysis, kinetic, gas product

摘要： 利用热重-红外联用分析仪（TG-FTIR）研究了垃圾衍生燃料（RDF）、污泥及混合热解的反应动力学和气体产物析出特性。研究结果表明，RDF与污泥混合热解过程存在协同作用。当污泥的掺混比例为50%时，整个热解过程表现为促进作用，且在500～1000℃温度段的促进效果最为明显。采用Coats-Redfern法对热解过程进行动力学分析发现，RDF与污泥混合热解反应在低温段（240～380℃）和高温段（670～740℃）符合2级反应规律，而在中温段（430～540℃）符合1级反应规律；相对于RDF单独热解，RDF掺混污泥共热解的活化能明显降低。FTIR分析发现，RDF掺混污泥共热解对CO₂和CO的析出影响不大，对CH₄的产生有明显促进作用。同时，共热解也导致HCl、NH₃和HCN等污染物析出增加。本研究结果可为RDF和污泥共热解工艺的开发与设计提供数据支撑。

关键词: 垃圾衍生燃料, 污泥, 热重-红外联用, 热解, 动力学, 气相产物

CLC Number:

X799.3

LIN Shunhong, LI Wei, BAI Jisong, LÜ Quanwei, JIANG Liao, MO Liu, LI Yu. Co-pyrolysis characteristics and kinetic analysis of refuse derived fuel (RDF) blends sludge[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3904-3910.

林顺洪, 李伟, 柏继松, 吕全伟, 江辽, 莫榴, 李玉. 垃圾衍生燃料掺混污泥共热解特性及动力学分析[J]. 化工进展, 2017, 36(10): 3904-3910.

References

[1] CHYANG C S,HAN Y L,WU L W,et al.An investigation on pollutant emissions from co-firing of RDF and coal[J].Waste Management,2010,30(7):1334-1340.
[2] KOBYASHI N,ITAYA Y,PIAO G,et al.The behavior of flue gas from RDF combustion in a fluidized bed[J].Powder Technology,图6 RDF和污泥及其混样热解过程中气相污染物随温度变化的析出曲线 2005,151(1):87-95.
[3] KIM Y,PARKER W.A technical and economic evaluation of the pyrolysis of sewage sludge for the production of bio-oil[J].Bioresource Technology,2008,99(5):1409-1416.
[4] 陈江,黄立维,章旭明.垃圾衍生燃料热重-红外联用法的热解特性[J].环境科学与技术,2008,31(1):29-32.CHEN Jiang,HAUNG Liwei,ZHANG Xuming.Pyrolysis analysis of RDF by TG-FTIR techniques[J].Environmental Science & Technology,2008,31(1):29-32.
[5] 曾广博,马晓茜,吴婕,等.船舶塑料垃圾热解特性及动力学分析[J].环境工程学报,2014,8(9):29-32.ZENG Guangbo,MA Xiaoqian,WU Jie,et al.Pyrolysis characteristics and kinetic analysis of plastic waste from ships[J].Chinese Journal of Environmental Engineering,2014,8(9):29-32.
[6] 李延吉,赵宁,姜璐,等.垃圾衍生燃料热解热重实验研究[J].电站系统工程,2012,28(2):1-4.LI Yanji,ZHAO Ning,JIANG Lu,et al.Study on thermogravimetric experimental of pyrolysis of refused derived fuel[J].Power System Engineering,2012,28(2):1-4.
[7] 金湓,李宝霞,金诚.不同温度区间内污泥热解气固相产物特征[J].化工学报,2014,65(6):2316-2322.JIN Pen,LI Baoxia,JIN Cheng.Characteristics of products from sewage sludge pyrolysis at various temperature ranges[J].CIESC Journal,2014,65(6):2316-2322.
[8] 刘秀如,吕清刚,赵科.城市污水污泥热解特性及动力学研究[J].热能动力工程,2010,25(6):677-690.LIU Xiuru,LV Qinggang,ZHAO Ke.Pyrolyis characteristics and kinetic study of urban sewage water and sludge[J].Journal of Engineering for Themal Energy and Power,2010,25(6):677-690.
[9] 常风民,王启宝,王凯军.城市污泥与煤混合热解特性及动力学分析[J].环境工程学报,2015,9(5):2412-2418.CHANG Fengmin,WANG Qibao,WANG Kaijun.Thermogravimetric characteristics and kinetics analysis of co-pyrolyiss of sewage sludge and coal[J].Chinese Journal of Environmental Engineering,2015,9(5):2412-2418.
[10] 高新勇,金晶,张号,等.市政污泥与烟煤的混合热解特性实验研究[J].煤炭转化,2014,37(1):83-87.GAO Xinyong,JIN Jing,ZAHNG Hao,et al.Experimental study on characteristic of co-pyrolysis of bituminous coal with municipal sludge[J].Coal Conversion,2014,37(1):83-87.
[11] PENG X W,Ma X Q,Lin Y S,et al.Co-pyrolysis between microalgae and textile dyeing sludge by TG-FTIR:kinetics and products[J].Energy Conversion & Management,2015,100(2):391-402.
[12] FANG S,YU Z,LIN Y,et al.Thermogravimetric analysis of the co-pyrolysis of paper sludge and municipal solid waste[J].Energy Conversion & Management,2015,101:626-631.
[13] 金湓,李宝霞.生物质与污水污泥共热解特性研究[J].可再生能源,2014,32(2):234-239.JIN Pen,LI Baoxia.The syudy of co-pyrolysis characteristics of the biomass and sewage sludge[J].Renewable Energy Resource,2014,32(2):234-239.
[14] CHEN W H,KUO P C.Isothermal torrefaction kinetics of hemicellulose,cellulose,lignin and xylan using thermogravimetric analysis[J].Energy,2011,36(11):6451-6460.
[15] CAMPBELL H W,DIRKZWAGER A H.Sewage sludge treatment and use[M].Elsevier Applied Science,1989.
[16] 贾晋炜,刘璐,惠贺龙,等.生活垃圾和玉米秆混合热解动力学及产物分布[J].环境工程学报,2014,8(12):5451-5457.JIA Jinwei,LIU Lu,HUI Helong,et al.Pyrolysis kinetics and product distributions of municipal solid waste and corn stalk blends[J].Chinese Journal of Environmental Engineering,2014,8(12):5451-5457.
[17] 刘义彬,马晓波,陈德珍,等.废塑料典型组分共热解特性及动力学分析[J].中国电机工程学报,2010,30(23):56-61.LIU Yibin,MA Xiaobo,CHEN Dezhen,et al.Copyrolysis characteristics and kinetic analysis of typical constituents of plastic wastes[J].Proceedings of the CSEE,2010,30(23):56-61.
[18] 柏继松,余春江,吴鹏,等.热重-红外联用分析垃圾衍生燃料的热解特性[J].化工学报,2013,64(3):1042-1048.BAI Jisong,YU Chunjiang,WU Peng,et al.TG-FTIR analysis on pyrolysis characteristics of refuse-derived fuel[J].CIESC Journal,2013,64(3):1042-1048.
[19] GRAMMELIS P,BASINAS P,MALLIOPOLOU A,et al.Pyrolysis kinetics and combustion characteristics of waste recovered fuels[J].Fuel,2009,88(1):195-205.
[20] 胡荣祖.热分析动力学[M].2版.北京:科学出版社,2008.HU Rongzu.Kinetics of thermal analysis[M].2nd ed.Bejing:Science Press,2008.
[21] COATS A W,REDFERN J P.Kinetic parameters from thermogravimetric data[J].Nature,1964,201(4914):68-69.
[22] 杨淑清,郑贤敏,王北福,等.临港含油污泥的热解动力学分析[J].化工学报,2015,66(s1):319-325.YANG Shuqing,ZHENG Xianmin,WANG Beifu,et al.Analysis of pyrolysis kinetics of neighboring-port oil sludge[J].CIESC Journal,2015,66(s1):319-325.
[23] 王擎,贾春霞,刘洪鹏.汪清油页岩燃烧动力学分析模型[J].中国电机学报,2012,32(23):27-31.WANG Qing,JIA Chunxia,LIU Hongpeng.Combustion kinetics model of Wangqing oil sludge[J].Proceedings of the CSEE,2012,32(23):27-31.
[24] SKODRAS G,GRAMMELIS P,BASINAS P,et al.A thermochemical conversion study on the combustion of residue-derived fuels[J].Water,Air,& Soil Pollution:Focus,2009,9(1/2):151-157.
[25] 姬登祥,艾宁,王敏,等.热重分析法研究水稻秸秆热裂解特性[J].可再生能源,2011,29(1):41-44.JI Dengxiang,AI Ning,WANG Min,et al.Study on pyrolysis characteristics of rice straw based on thermogravimetric analysis[J].Renewable Energy Resource,2011,29(1):41-44.
[26] 桑圣欢,段钰锋,陈惠超,等.热重-红外联用分析纸厂废弃塑料的热解特性[J].环境科学与技术,2013,36(2):159-163.SANG Shenghuan,DUAN Yufeng,CHEN Huichao,et al.TG-FTIR analysis on pyrolysis characteristics of waste plastics[J].Environmental Science & Technology,2013,36(2):159-163.
[27] 刘国涛,唐利兰.城市有机垃圾热解过程中NH₃、H₂S和HCl的析出特性[J].环境工程学报,2016,10(8):4499-4503.LIU Guotao,TANG Lilan.Release characteristics of NH₃\H₂S and HCl during pyrolysis of organic fraction of municipal solid wastes[J].Chinese Journal of Environmental Engineering,2016,10(8):4499-4503.