Effect of attapulgite suspensions on PM2.5 emission of coal combustion in CFB

被引：0

作者：

Chen, Huichao ^{[1
]}

Wu, Wei ^{[1
]}

Liang, Cai ^{[1
]}

Zeng, Xiaoqiang ^{[1
]}

机构：

[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, 210096, Jiangsu Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2015年 / 35卷 / 17期

关键词：

Attapulgite; Circulating fluidized bed (CFB); Particle aggregation; PM[!sub]2.5[!/sub; Suspension;

D O I：

10.13334/j.0258-8013.pcsee.2015.17.015

中图分类号：

学科分类号：

摘要：

Fine particles (PM2.5) emission behavior was investigated in a circulating fluidized bed (CFB) with attapulgite suspensions spraying into the flue gas. The effects of flow rate of attapulgite suspensions, gas-liquid ratio and attapulgite mass fraction on PM2.5 emission were studied in a CFB where coal of 0.6-1.5 mm was combusted at a temperature of 900℃. Morphology analysis and element migration features of the collected particle samples were analyzed. The results show that spraying attapulgite suspensions into flue gas can effectively reduce PM2.5 emission. Both the PM2.5 number density and mass density decrease with the increase in flow rate of attapulgite suspensions and mass fraction of attapulgite in the suspensions. A trend of shift in particle size can be observed from submicron particles to supermicron ones. Increasing gas-liquid ratio was in favor of particle aggregation leading to decrease in PM2.5 emission. Based on PM2.5 particle size distribution, morphology analysis and element migration features, a conclusion can be drawn that spraying attapulgite suspensions helps to promote particle aggregation and effectively reduce PM2.5 emission during coal combustion in CFB. © 2015 Chin. Soc. for Elec. Eng.

引用

页码：4408 / 4416

页数：8

共 21 条

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