城市生活垃圾与稻壳混合制取垃圾衍生燃料的动力学
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摘要
为提高水泥窑协同处置城市生活垃圾的能源化利用率,运用Coats-Redfern方法对城市生活垃圾与稻壳混合制取的垃圾衍生燃料(RDF)进行动力学分析。结果表明:稻壳、城市生活垃圾以及由其混合制取的RDF的燃烧过程可由2～3个1级反应进行描述;城市生活垃圾、稻壳及RDF的活化能都很小,具有较好的着火特性;加入稻壳后RDF的活化能及指前因子略有增大;加入稻壳后RDF的反应速率明显提高,尤其是加入少量稻壳时反应速率常数由5.88增加到40.5和48.8。可以认为水泥窑协同处置城市生活垃圾时,加入少量的稻壳(最大燃烧速率时的稻壳质量分数为20%)可以提高生活垃圾的燃烧速率,从而稳定分解炉内的燃烧。
The combustion dynamic analysis of refuse derived fuel(RDF) made by municipal solid waste and rice hunk by means of Coats-Redfern was investigated for raising the energy utilization rate of the municipal solid waste. Results showed that the combustion process of rice husk, municipal solid waste and RDF could be described by two or three first-order reactions; RDF had a lower ignition temperature than coal because of its low activation energy. After addition of rice husk, activation energy and pre-exponential factor of RDF were improved; the RDF reaction rate was significantly increased with adding rice husk at the same thermodynamic temperature, and the reaction rate constants for the samples added a small amount of rice hunk increased from 5.88 to 40.5 and 48.8. It could be considered that when using the cement kiln to coordinated disposal of municipal solid waste, adding a small amount of rice hunk(20% at maximum reaction rate constants of RDF) could increase the reaction rate of municipal solid waste, and stabilize the combustion in the decomposition furnace.
The combustion dynamic analysis of refuse derived fuel(RDF) made by municipal solid waste and rice hunk by means of Coats-Redfern was investigated for raising the energy utilization rate of the municipal solid waste. Results showed that the combustion process of rice husk, municipal solid waste and RDF could be described by two or three first-order reactions; RDF had a lower ignition temperature than coal because of its low activation energy. After addition of rice husk, activation energy and pre-exponential factor of RDF were improved; the RDF reaction rate was significantly increased with adding rice husk at the same thermodynamic temperature, and the reaction rate constants for the samples added a small amount of rice hunk increased from 5.88 to 40.5 and 48.8. It could be considered that when using the cement kiln to coordinated disposal of municipal solid waste, adding a small amount of rice hunk(20% at maximum reaction rate constants of RDF) could increase the reaction rate of municipal solid waste, and stabilize the combustion in the decomposition furnace.
引文
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[22] PETROVI Z S,ZAVARGO Z Z.Reliability of methods for determination of kinetic parameters from thermogravimetry and DSC measurements[J].Journal of Applied Polymer Science,1986,32(4):4353.
[23] KARA M,GüNAY E,TABAK Y,et al.Development of refuse derived fuel for cement factories in turkey[J].Combustion Science and Technology,2010,183(3):203.
[24] 胡荣祖,史启祯.热分析动力学[M].北京:科学出版社,2001:218.
[2] 中华人民共和国国家统计局.中国统计年鉴(2018) [M].北京:中国统计出版社,2018:2511.
[3] 蔡玉良,杨学权,辛美静,等.重点关注水泥窑协同处置城市生活垃圾技术及推广应用[J].中国水泥,2011(5):43.
[4] 宋志伟,吕一波,张万峰.复合垃圾衍生燃料燃烧-热解特性的研究[J].洁净煤技术,2007(3):44.
[5] 邢智炜.城市生活垃圾的燃烧特性研究[D].武汉:华中科技大学,2013.
[6] 闫晶晶.城市生活垃圾衍生燃料燃烧特性研究[D].杭州:浙江工业大学,2010.
[7] 尹国明.水泥窑协同处置生活垃圾对水泥生产的影响及应对措施[J].水泥工程,2016(4):82.
[8] ELINA D,DAGNIJA B.An assessment of the potential of refuse(derived fuel in Latvia)[J].Management of Environmental Quality (An International Journal),2012,23(5):503.
[9] 陈盛建,高宏亮,余以雄,等.垃圾衍生燃料(RDF)的制备及应用[J].节能与环保,2004(4):27.
[10] 朱明,祝慰,王发洲,等.城市生活垃圾制备的RDF的热工性能研究[J].可再生能源,2014(12):1928.
[11] 胡曙光,聂帅,朱明,等.城市生活垃圾制备水泥窑用衍生燃料的性能分析[J].安全与环境学报,2014(4):176.
[12] KARA M.Environmental and economic advantages associated with the use of RDF in cement kilns[J].Resources,Conservation and Recycling,2012,68:21.
[13] 孙明明.高热值垃圾与生物质混合制取RDF及其燃烧特性研究[D].沈阳:沈阳航空工业学院,2009.
[14] 周斌.生物质秸秆成型燃料与垃圾衍生燃料RDF-5混合燃烧效果研究[C]//2014中国环境科学学会学术年会.成都:中国环境科学学会,2014.
[15] 周斌,雷建国,冯聚.秸秆成型燃料与垃圾衍生燃料混合燃烧研究[J].中国环保产业,2016(1):30.
[16] DEMIRBAS A.Potential applications of renewable energy sources,biomass combustion problems in boiler power systems and combustion related environmental issues[J].Progress in Energy and Combustion Science,2005,31(2):171.
[17] 田颖,马泽宇,徐期勇,等.生物质-垃圾混合燃烧特性及其环境分析[J].中国农学通报,2013,29(35):193.
[18] AGUIRRE-ZERO O,ZERO D T,PROSKIN H M.Effect of chewing xylitol chewing gum on salivary flow rate and the acidogenic potential of dental plaque[J].Caries Research,1993,27(1):55.
[19] DHILLON A,GUPTA J K,JAUHARI B M,et al.A cellulase-poor,thermostable,alkalitolerant xylanase produced by Bacillus circulans AB 16 grown on rice straw and its application in biobleaching of eucalyptus pulp[J].Bioresource Technology,2000,73(3):273.
[20] 陆飞,王永桥,章静,等.稻壳燃烧特性与动力学模型的研究[J].能源研究与利用,2009(5):10.
[21] 陈蓉,王华,王辉涛,等.稻壳与木屑燃烧和灰结渣特性对比分析[J].太阳能学报,2015(7):1749.
[22] PETROVI Z S,ZAVARGO Z Z.Reliability of methods for determination of kinetic parameters from thermogravimetry and DSC measurements[J].Journal of Applied Polymer Science,1986,32(4):4353.
[23] KARA M,GüNAY E,TABAK Y,et al.Development of refuse derived fuel for cement factories in turkey[J].Combustion Science and Technology,2010,183(3):203.
[24] 胡荣祖,史启祯.热分析动力学[M].北京:科学出版社,2001:218.
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