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1、第 35卷第 5期2005年 9月 东南大学学报 (自然科学版 )JOURNAL OF SOUTHEAST UNIVERSITY (NaturalScience Edition) Vol135 No15Sep.t 20055?3#+李永旺 赵长遂 吴 新 韩 松 鲁端峰 沈湘林(2v?#/Li,2210096)K1: 根据气固流态化原理,设计了一种实用新颖的流化床气溶胶发生装置.该气溶胶发生装置可以稳定地输出高粒子数浓度a空气动力学直径小于 10 Lm的气溶胶颗粒物.应用该装置对燃煤电站锅炉电除尘器粉煤灰进行了气溶胶化实验.实验表明,通过改变流化气体(氮气)流量a待气溶胶化的粉煤灰和青铜珠床料
2、组成的混合物料的给料速率以及流化床床层物料中飞灰的掺混质量比,可以调节流化床气溶胶发生装置输出的飞灰粒子数浓度.测试结果表明:飞灰粒子数浓度呈双峰分布, 2个峰值分别位于空气动力学直径为 0101 011 Lm和 011 10 Lm的范围内;飞灰质量浓度随着颗粒粒径的增大而增加.1oM: 气溶胶发生器; 流化床; 粒子数浓度ms|: X513 DSM: A cI|: 1001- 0505( 2005) 05-0742-04Development and characteristic of novel fluidized bed aerosolgeneratorL iYongwang Zhao
3、Changsui W uX in Han Song Lu Duanfeng ShenX ianglin(Key Laboratory ofClean CoalPowerGeneration and Combustion Technology ofM inistry ofEducation, SoutheastUniversity, Nanjing 210096, China)Abstract: An innovative fluidized bed aerosolgeneratorwasdeveloped for the purpose of generatinga constantoutpu
4、t ofdry, under10 Lm particlesw ith a large number concentration. The output of thefluidized bed forgenerating aerosolparticles of dry fly ash from coa-l fired utility boilerwas charac-terized using the electrical low pressure impactor ( ELPI). The number concentration of particlesproduced in the ran
5、ge of 0101 to 10 Lm was found to vary w ith themass ratio of fly ash to bronzebeads in themixed bedmateria,l and nitrogen flow rate through the fluidized bed and feed rate of them ixture. The particle size distribution is bimoda,l w ith onemode in 0101 to 011 Lm diameter sizerange and the other in 0
6、11 to 10 Lm diameter size range. The particlemass concentration risesw iththe increase of particle diameter.Key words: aerosolgenerator; fluidized bed; particle number concentrationl: 2005-03-18.:SE$?Z9( 9739)(2002CB211600).Te:(1979) ),3,pV3;u(),3,q,pV3=, cszhao seu. edu. cn.8F%AR7s81.vVRXvl5,mWSj.V
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