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Effect of furnace temperature and oxygen concentration on combustion and CO/NO emission characteristics of sewage sludge

Author

Listed:
  • Ni, Zhanshi
  • Zhang, Yaokun
  • Liu, Xiang
  • Shi, Hao
  • Yao, Yurou
  • Tian, Junjian
  • Hu, Peng
  • He, Liqun
  • Lin, Qizhao
  • Meng, Kesheng

Abstract

Addressing the growing energy crisis, the development and utilization of solid waste have become a critical research areas. Sewage sludge, rich in organic matter, can serve as an alternative fuel to coal. This study employs a thermogravimetric analyzer to investigate the combustion characteristics of sewage sludge at heating rates of 10, 20, and 40 °C/min. Additionally, a horizontal tube furnace is utilized to analyze the CO and NO emission characteristics during sewage sludge combustion at varying oxygen concentrations and temperatures. Results indicate that at a constant gas velocity, the primary factor influencing combustion characteristics and CO/NO emissions is the composition difference. Higher furnace temperatures lead to lower CO generation and increased combustion efficiency. The conversion of coke-N to NO rises with increasing temperature. Moreover, higher furnace temperatures decrease the conversion of fuel-N to NO. Increasing oxygen concentration reduces the ignition concentration limit of sewage sludge. The lowest NOx emissions were recorded at an oxygen concentration of 21 vol%. This study provides essential data for reducing coal consumption and enhancing the safe and efficient treatment of sewage sludge.

Suggested Citation

  • Ni, Zhanshi & Zhang, Yaokun & Liu, Xiang & Shi, Hao & Yao, Yurou & Tian, Junjian & Hu, Peng & He, Liqun & Lin, Qizhao & Meng, Kesheng, 2024. "Effect of furnace temperature and oxygen concentration on combustion and CO/NO emission characteristics of sewage sludge," Renewable Energy, Elsevier, vol. 234(C).
    • Handle: RePEc:eee:renene:v:234:y:2024:i:c:s096014812401293x
    DOI: 10.1016/j.renene.2024.121225
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