Pseudo-component method for characterization of the thermochemical conversion of combustible solid waste
LONG Yanqiu1, LI Qinghai1, ZHOU Hui2, MENG Aihong1, ZHANG Yanguo1
1. Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;
2. Department of Earth and Environmental Engineering, Columbia University, New York 10027, USA
Abstract:The treatment of combustible solid waste (CSW) is a critical environmental issue with thermochemical conversion regarded as a promising waste-to-energy (WTE) technology. The CSW properties that are relevant to the thermochemical conversion, such as the volatile content and the gross heating value, are required for incinerator design. This paper presents a pseudo-component analysis method using nine types of model components including cellulose, hemicellulose, lignin, starch, PE, PVC, PP, PS and PET to characterize the thermochemical conversion of the CSW waste stream. Each type of CSW can be represented by model components in terms of thermal mass coefficients obtained from TGA pyrolysis tests. The TGA curves of the model components were used to fit the curves for different types of CSW materials. Multiple linear regressions are used to acquire the thermal mass coefficients. The grey relation grade is used evaluate the accuracy. The average prediction error is within 5% for the volatiles and 10% for the gross heating value. This method provides a simple method for predicting the CSW properties for engineering designs.
中华人民共和国国家统计局. 中国统计年鉴[M]. 北京:中国统计出版社, 2014.National Bureau of Statistics of China. China Statistical Yearbook[M]. Beijing:China Statistics Press, 2014. (in Chinese)
[2]
李清海, 甘超, 蒙爱红, 等. 干燥对乏垃圾热值影响的实验研究[J]. 清华大学学报(自然科学版), 2011, 51(12):1865-1869. LI Qinghai, GAN Chao, MENG Aihong, et al. Experimental study on effect of drying on heating value of spent waste[J]. Journal of Tsinghua University (Science and Technology), 2011, 51(12):1865-1869. (in Chinese)
[3]
Miller R S, Bellan J. A generalized biomass pyrolysis model based on superimposed cellulose, hemicellulose and lignin kinetics[J]. Combustion Science and Technology, 1997, 126(1-6):97-137.
[4]
YANG Haiping, YAN Rong, CHEN Hanping, et al. Characteristics of hemicellulose, cellulose and lignin pyrolysis[J]. Fuel, 2007, 86(12-13):1781-1788.
[5]
YANG Haiping, YAN Rong, CHEN Hanping, et al. In-depth investigation of biomass pyrolysis based on three major components:Hemicellulose, cellulose and lignin[J]. Energy & Fuels, 2006, 20(1):388-393.
[6]
LIU Qian, WANG Shurong, WANG Kaige, et al. Pyrolysis of wood species based on the compositional analysis[J]. Korean Journal of Chemical Engineering, 2009, 26(2):548-553.
[7]
ZHOU Hui, LONG Yanqiu, MENG Aihong, et al. Classification of municipal solid waste components for thermal conversion in waste-to-energy research[J]. Fuel, 2015, 145:151-157.
[8]
ZHOU Hui, LONG Yanqiu, MENG Aihong, et al. Thermogravimetric characteristics of typical municipal solid waste fractions during co-pyrolysis[J]. Waste Management, 2015, 38:194-200.
[9]
龙艳秋. 可燃固体废弃物热转化特性的基元表征方法研究[D]. 北京:清华大学, 2017.LONG Yanqiu. Pseudo-component Method for Characteration of Thermochemical Conversion of Combustible Solid Waste[D]. Beijing:Tsinghua University, 2017. (in Chinese)
[10]
蒙爱红, 龙艳秋, 周会, 等. 可燃固体废弃物热化学反应表征探索[J]. 清华大学学报(自然科学版), 2014, 54(2):235-239.MENG Aihong, LONG Yanqiu, ZHOU Hui, et al. Pseudo-component model to predict the thermochemical behavior of combustible solid waste[J]. Journal of Tsinghua University (Science and Technology), 2014, 54(2):235-239. (in Chinese)
[11]
刘思峰, 谢乃明. 灰色系统理论及其应用[M]. 北京:科学出版社, 2008.LIU Sifeng, XIE Naiming. The Theory and Application of Grey System[M]. Beijing:Science Press, 2008. (in Chinese)
[12]
Lin X, Wang F, Chi Y, et al. A simple method for predicting the lower heating value of municipal solid waste in China based on wet physical composition[J]. Waste Management, 2015, 36:24-32.