Study on Ash Composition and Acidic Gases Emissions during Co-Combustion of Domestic Waste and Coal
Keywords:
Domestic Waste, Coal, Ash, Heavy Metals, Acidic Gas.Abstract
This study examines separately the composition and metal content of the ash generated during the combustion of domestic waste and combustion of coal mixed with different proportion of domestic waste and the impact of domestic waste mixing proportion on acidic gas of gases generated during fuel combustion as well as influencing factors analysis. The results show that when the garbage content is less than 60%, it can be used as fuel substitute materials of cement. SiO2, CaO, Al2O3, Fe2O3 content of mixed fuel ash are more than 10%, the total content of four kinds of oxide is between 75% and 85%, alkali content (0.658K2O+NaO) is between 2.71% and 6.22% , and five heavy metals (Pb, Ni, Cd, As, Hg) contents are all less than that generated during the combustion of coal alone. Mixed fuel with domestic waste can reduce NOx and SO2 emissions of combustion gases to a certain extent, and HCl gas emissions is increasing with increasing proportion of domestic waste. When garbage content reaches 30%, acidic gases emissions generated during combustion of mixed fuel is optimal. Combustion temperature and air flow rate influence NOx and SO2 gas emissions during mixed fuel combustion, but have little effect on HCl gas emissions.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
Qiao Y.J. (2013): Hazard-free Treatment, Reduction and Reclamation of Urban Domestic Waste [J] Journal of HeiLongJiang Vocational Institute of Ecological Engineering. 26: 4-5
Li D.Z., Wang P. and Liu L. (2011): Comment on Blend Combustion of Urban Domestic Waste and Coal and the Comprehensive Utilization [J]. Power System Engineering. 27: 1-4.
Wan H. P., Chang Y. H., Chen W. C., et al, (2008): Emissions during co-firing of RDF-5 with bituminous coal, paper sludge and waste tires in a commercial circulating fluidized bed co-generation boiler[J]. Fuel, 87:761-767.
Feng Y, Yang Q, Wang X, et al, (2010): Treatment of carbon fiber brush anodes for improving power generation in air cathode microbial fuel cells [J]. Journal of Power Sources, 195(7) : 1841-1844.
Zhang Jishi, Sun Kewei, Su Cunrong, (2004): The advanced development of MSW treatment [J] . China Integrative Utilization of Resources, (9) : 18) 21.
Zhao S., Li H.B. and Yan C.F. et al, (2006): Generation of NOx during Fluidized Bed Combustion of Refuse-derived Fuel (RDF). Acta Energiae Solaris Sinica. 27, 212-216.
Xie K.C., Zhao M.J., (2003): Co-firing of coal and refuse-derived fuel in a new type of internally circulating fluidized bed system[J]. Energy Sources. 25: 1073-1081.
Liu J, Liu J, He W, et al, (2014): Enhanced electricity generation for microbial fuel cell by using electrochemical oxidation to modify carbon cloth anode [J] Journal of Power Sources, 265: 391-396.
Wang X, Feng Y, Liu J, et al, (2010): Power generation using adjustable Nafion/PTFE mixed binders in air-cathode microbial fuel cells [J]. Biosensors & Bioelectronics, 26(2) : 946-948.
Li Beibei, Yin Peihong, Fang Xiuqi, et al. (2011): How Germany reached its Kyoto emission reduction targets[J]. Resources Science, 33(3), 588-594.
Maciel F J, Jucá J F.(2011): Evaluation of landfill gas production and emissions in a MSW large-scale experimental cell in Brazil[J]. Waste Management, 31(5), 966-977.
Alfonso A.U., Ana M. L.S., German F., et al, (2013): Uses of alternative fuels and raw materials in the cement industry as sustainable waste management options[J]. Renewable and Sustainable Energy Reviews. 23: 242-260.
Dong C.Q., Jin B.S., Zhong Z.P. et al, (2002): Acid Gas Emission during Coal Circulating Fluidized Bed Combustion with Admixture of Urban Domestic Waste [J]. Proceedings of the CSEE. 22: 32-37.
Chen G.Y., Zeng J.J. and Duan C.J., (2013): Research on Combustion Characteristics of Urban Domestic Waste [J]. China Environmental Protection Industry. 2: 43-44.
Wang W.G., Fu X.H., Wang X.Z., (2013): Smoke Pollutants Control Technology Selection for Domestic Waste Combustion [J]. China Population · Resources and Environment . 2: 43-44.
H.Baier, K.Menzel, et al., (2011): Proven experiences with alternative fuels in cement kilns[J]. 13th International congress on the chemistry of cement.
Zhang H.Q. (2007): Research on Blend Combustion of Biomass and Coal and Pollutant Emission Characteristics [D]. Jinan: Shandong University.
Zhang D.P., (2003): Acid Gas Emission During Urban Domestic Waste Fluidized Bed Combustion and Neural Network Forecast [D]. Hangzhou: Zhejiang University.