Evaluation of PCDD/Fs emission from fluidized bed incinerators co-firing MSW with coal in China

• Published in: Journal of hazardous materials 2006-07, Vol.135 (1), p.47-51
• Main Authors: Yan, J.H., Chen, T., Li, X.D., Zhang, J., Lu, S.Y., Ni, M.J., Cen, K.F.
• Format: Article
• Language: English
• Subjects: Applied sciences; Atmospheric pollution; Benzofurans - chemistry; Chemical engineering; China; Cities; Coal; Dioxins - chemistry; Exact sciences and technology; Fires; Fluidization; Fluidized bed incinerator (FBI); General processes of purification and dust removal; Municipal solid waste (MSW); Pollution; Polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs); Porphyrins - chemistry; Power Plants; Prevention and purification methods; Soil Pollutants - analysis; Urban and domestic wastes; Wastes; Water Pollutants - analysis
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2005.12.007

The levels and homologue profile of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) from stack gas of three typical fluidized bed incinerators co-firing municipal solid waste (MSW) with Chinese coal were measured. The PCDD/Fs emission was in the range of 0.0054–0.1961 ng I-TEQ/N m 3. Comparison of PCDD/Fs detection results by HRGC/HRMS and HRGC/LRMS suggested that it was feasible to detect fly ash with high PCDD/Fs concentration by HRGC/LRMS. Several factors on PCDD/Fs emission were discussed. The primary reason for the lower PCDD/Fs emission was the inhibition mechanism of relatively high sulfur in feeding coal on PCDD/Fs formation. The emission results also showed that there was no directly correlation between PCDD/Fs levels and CO, O 2 and HCl concentration in flue gas. It was estimated that about 0.1034 g I-TEQ was annually emitted to atmosphere from the tested three MSW incinerators (total daily treatment capacity is 800 tonnes MSW).