污泥与煤混烧中飞灰对汞吸附特性.pdfVIP

第 28 卷 第 14 期 中 国 电 机 工 程 学 报 Vol.28 No.14 May 15, 2008 2008 年 5 月 15 日 Proceedings of the CSEE ©2008 Chin.Soc.for Elec.Eng. 55 文章编号：0258-8013 (2008) 14-0055-06 中图分类号：TK 224 文献标识码：A 学科分类号：470⋅10 污泥与煤混烧中飞灰对汞的吸附特性 吴成军，段钰锋，赵长遂 (洁净煤发电及燃烧技术教育部重点实验室(东南大学)，江苏省 南京市 210096) Adsorption Characterization of Mercury by Fly Ashes During Co-combustion of Sludge and Coal WU Cheng-jun, DUAN Yu-feng, ZHAO Chang-sui (Key Laboratory of Clean Coal Power Generation and Combustion Technology(Southeast University), Ministry of Education, Nanjing 210096, Jiangsu Province, China) ABSTRACT: In order to understand the performance of fly 的物理吸附性能。烟气成分与飞灰化学组成可能对汞存在一 ashes on mercury adsorption, the surface area and pore 定的催化氧化作用。 distribution of four fly ash samples was studied by using the 关键词：混烧；飞灰；汞吸附；孔隙结构；分形维数；灰组 nitrogen adsorption isotherms. Their fractal dimensions were 分；催化氧化 also calculated by a method based on Frenkel-Halsey-Hill (FHH) model. Chemical compositions of fly ash samples were 0 引言 also determined. The results indicate that there is a positive 焚烧以其处理彻底性、减量率可达 95%左右， correlation between unburned carbon content and mercury 有机物被完全氧化分解，致病菌等微生物被杀死等 content in fly ash samples. The bigger the specific surface area 技术优势越来越广泛地被应用于污泥处理[1] 。当然， of fly ash particles and thus the more mercury adsorbed. Wider 焚烧法也存在一些不足，如污泥焚烧过程中会产生 pore distribution is beneficial to mercury adsorption and micropores play a more significant role in mercury adsorption. 二次污染物，包括有害气体、有害废渣等，其中汞 The fractal dim