Study on Ash Composition and Acidic Gases Emissions during Co-Combustion of Domestic Waste and Coal

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Authors

  • Jingjing Liu
     School of Chemistry Engineering, Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha, Hunan ,CN
  • Ruilin Man
     School of Chemistry Engineering, Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha, Hunan ,CN
  • Shexia Ma
     South China Institute of Environmental Sciences, MEP, Guangzhou ,CN
  • Juangsheg Li
     Changsha Environmental Protection College, Changsha, Hunan ,CN
  • Qi Wu
     School of Chemistry Engineering, Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha, Hunan ,CN
  • Juanying Peng
     Changsha Environmental Protection College, Changsha, Hunan ,CN
  • Hui Xi
     Changsha Environmental Protection College, Changsha, Hunan ,CN

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.

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Published

2022-10-19

How to Cite

Liu, J., Man, R., Ma, S., Li, J., Wu, Q., Peng, J., & Xi, H. (2022). Study on Ash Composition and Acidic Gases Emissions during Co-Combustion of Domestic Waste and Coal. Journal of Mines, Metals and Fuels, 64(10), 535–541. Retrieved from https://informaticsjournals.com/index.php/jmmf/article/view/31604

Issue

Volume 64, Issue 10, October 2016

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

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