[1]屈成锐,赵长遂,段伦博,等.O2/CO2气氛煤粉粒径对PM2.5形成的影响[J].东南大学学报(自然科学版),2009,39(5):983-987.[doi:10.3969/j.issn.1001-0505.2009.05.023]
 Qu Chengrui,Zhao Changsui,Duan Lunbo,et al.Effect of coal granule size on formation of PM2.5 in O2/CO2 atmosphere during coal combustion[J].Journal of Southeast University (Natural Science Edition),2009,39(5):983-987.[doi:10.3969/j.issn.1001-0505.2009.05.023]
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O2/CO2气氛煤粉粒径对PM2.5形成的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第5期
页码:
983-987
栏目:
能源与动力工程
出版日期:
2009-09-20

文章信息/Info

Title:
Effect of coal granule size on formation of PM2.5 in O2/CO2 atmosphere during coal combustion
作者:
屈成锐 赵长遂 段伦博 周骛
东南大学能源与环境学院, 南京 210096
Author(s):
Qu Chengrui Zhao Changsui Duan Lunbo Zhou Wu
School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
燃烧 PM2.5 形成机理 煤粉粒径
Keywords:
combustion PM2.5 formation mechanism coal granule size
分类号:
TK16
DOI:
10.3969/j.issn.1001-0505.2009.05.023
摘要:
采用管式炉研究了煤粉粒径对可吸入颗粒物排放特性的影响.试验煤种为徐州烟煤,煤粉粒径分别为135~220 μm,91~135 μm,61~91 μm和0~61 μm; 燃烧试验在1 123 K,O2/CO2气氛下进行.试验用荷电低压撞击器(ELPI)采集燃烧后的可吸入颗粒物.结果显示:煤粉粒径是燃烧过程中影响PM2.5(2.5 μm以下颗粒物)生成的重要因素,粒径越小,生成的PM2.5越多; 4种粒径煤粉燃烧后生成的PM2.5粒径分布都是相似的双峰分布,峰值点分别出现在0.2和2.5 μm左右.随着煤粉粒径的减小,S,Na和K几种元素的浓度值增加很大,Ca和Si的浓度值减少很多,而Fe的浓度值变化不大.粒径小于0.317 μm的颗粒可能通过气化-凝结机理形成,超微米颗粒则可能是通过亚微米颗粒凝聚、聚结和矿物质熔融、破碎、聚结形成.
Abstract:
The influence of coal granule size on the emission characteristics of inhalable particles was studied with a tube furnace. Xuzhou bituminous coal was used, grouped in four size ranges: 135-220 μm, 91-135 μm, 61-91 μm and 0-61 μm. The combustion tests were carried out at 1 123 K under O2/CO2 conditions. The inhalable particulates after combustion were collected into an electrical low pressure-impactor(ELPI). Results indicate that the coal granule’s size is an important factor for the formation of PM2.5(particulates with diameters less than 2.5 μm)during combustion. The smaller the coal granule size is, the more PM2.5is formed. The size distributions of PM2.5 formed after combustion of coal granule with different size are similar, displaying two peaks around 0.2 μm and 2.5 μm respectively. With decreasing of coal granule size, the concentrations of S, Na, and K increase rapidly; Ca and Si decrease strikingly and Fe changes a little. The ash particles smaller than 0.317 μm may form via the mechanism of vaporization and condensation, and the supermicron-size ash particles may form by coagulation and coalescence of the submicron-size ash, and fragmentation and coalescence of mineral matter.

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备注/Memo

备注/Memo:
作者简介: 屈成锐(1970—),男,博士生; 赵长遂(联系人),男,教授,博士生导师,cszhao@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2006CB705806).
引文格式: 屈成锐,赵长遂,段伦博,等.O2/CO2气氛煤粉粒径对PM2.5形成的影响[J].东南大学学报:自然科学版,2009,39(5):983-987. [doi:10.3969/j.issn.1001-0505.2009.05.023]
更新日期/Last Update: 2009-09-20