循环流化床锅炉排放粉尘中多环芳烃的存在情况

Occurrence of polycyclic aromatic hydrocarbons in dust emitted from circulating fluidized bed boilers.

作者信息

Kozielska B, Konieczyńiski J

机构信息

Silesian University of Technology, Faculty of Energy and Environmental Engineering, Department of Air Protection, 2 Akademicka St., 44-101 Gliwice, Poland.

出版信息

Environ Technol. 2008 Nov;29(11):1199-207. doi: 10.1080/09593330802250485.

DOI:10.1080/09593330802250485

PMID:18975852

Abstract

Occurrence of polycyclic aromatic hydrocarbons (PAHs) in granulometric fractions of dust emitted from a hard coal fired circulating fluidized bed (CFB) boiler was investigated. The dust was sampled with the use of a Mark III impactor. In each fraction of dust, by using gas chromatography (GC), 16 selected PAHs and total PAHs were determined and the toxic equivalent B(a)P (TE B(a)P) was computed. The results, recalculated for the standard granulometric fractions, are presented as concentrations and content of the determined PAHs in dust. Distributions of PAHs and their profiles in the granulometric dust fractions were studied also. The PAHs in dust emitted from the CFB boiler were compared with those emitted from mechanical grate boilers; a distinctly lower content of PAHs was found in dust emitted from the former.

摘要

研究了硬煤燃烧循环流化床（CFB）锅炉排放粉尘粒度级分中多环芳烃（PAHs）的存在情况。使用Mark III冲击器对粉尘进行采样。在每个粉尘级分中，通过气相色谱法（GC）测定16种选定的PAHs和总PAHs，并计算毒性当量B(a)P（TE B(a)P）。针对标准粒度级分重新计算的结果以粉尘中测定的PAHs浓度和含量呈现。还研究了PAHs在粒度粉尘级分中的分布及其特征。将CFB锅炉排放粉尘中的PAHs与机械炉排锅炉排放的PAHs进行了比较；发现前者排放的粉尘中PAHs含量明显较低。