燃烧源PM_2_5_微粒润湿性能.pdf

第 36卷第 5期 2006年 9月 东南大学学报 (自 然科学版 ) JOURNAL OF SOUTHEAST UN IVERS ITY (N atural Science Ed ition ) V ol 36 No 5 Sep.t 2006 燃烧源 PM2 5微粒润湿性能 颜金培 杨林军 沈湘林 (东南大学洁净煤发电与燃烧技术教育部重点实验室, 南京 210096) 摘要: 利用W ashburn动态渗透压力法研究了燃煤电厂与垃圾焚烧发电厂 PM 2 5微粒的润湿性能 及其与微粒形态和组分的关系, 并考察了添加润湿剂 (十二烷基苯磺酸钠 ( SDBS )、十二烷基硫 酸钠 ( SDS)、JFC、FS-310、S ilanolw 22)对水润湿燃烧源 PM2 5的改善作用. 利用扫描电镜和 X-射 线能谱分析了微粒的形态和化学组分.结果表明: 微粒的形态和组分对润湿性能有较大影响,垃 圾焚烧发电厂 PM2 5微粒的水润湿性能优于燃煤电厂 PM2 5; 不同润湿剂改善燃烧源 PM2 5微粒润 湿性的效果与微粒特性密切相关, SDS, S ilanol w22可明显改善燃煤电厂 PM 2 5微粒的润湿性能, 而 FS-310, JFC则对垃圾焚烧电厂 PM2 5微粒有显著改善作用;研究结果可为利用蒸汽相变提高 燃烧源 PM 2 5脱除效果及湿法除尘提供重要基础. 关键词: 燃烧源 PM 2 5; 润湿剂; 润湿性能 中图分类号: X51 文献标识码: A 文章编号: 1001- 0505( 2006) 05-0760-05 Wettability of PM2 5 from combustion Yan J inpei Yang L in jun Shen X iang lin (K ey Laboratory of C lean C oal Pow er Generation and Com bust ion T echnology ofM in is try of Educat ion, Sou th eas tUn iversity, Nan jing 210096, Ch ina) Abstract: AW ashburn penetration pressurem ethod w as used to determ ine thew ettab ility of PM2 5 from coa-l fired and mun icipa l solid w aste incineration (M SW I) pow er plant by a range of w ett ing agents ( SDBS, SDS, JFC, FS-310, Silano l w 22 ) and w ater so lu tion. The role of part icle morpho logy and chem ical composition was exp lo red by scann ing electron m icroscopy ( SEM ) and X-ray photoelectron spectroscopy ( XPS) . It is conc luded that the w etting ability of PM2 5 is in relat ion w ith both themo r- pho logy and composition, and the PM2 5 from M SW I pow er plant is morew ettable. It seem s that SDS、 S ilano lw 22 can improve coa-l combustion PM2 5 wettab ility obv iously, wh ileFS-310, JFC are in favo r of M SW I particles. The improvem ent of PM 2 5 wettab ility by add ition w etting agen ts relates closely to the character istics of PM 2 5. The resu lts are sign ificant fo r the separat ion of PM 2 5 from gases by heteroge- neous condensation o fw ater vapor as a preconditioning techn ique and w e-t process dedusting. Key words: PM 2 5 from combust