Chemical agglomeration of fine particles in coal combustion flue gas: Experimental evaluation

被引：49

作者：

Guo Yiquan ^{[1
]}

Zhang Junying ^{[1
]}

Zhao Yongchun ^{[1
]}

Wang Shaolong ^{[1
]}

Jiang Cheng ^{[1
]}

Zheng Chuguang ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

来源：

FUEL | 2017年 / 203卷

基金：

中国国家自然科学基金;

关键词：

Fine particles; Chemical agglomeration; Removal efficiency; Coal combustion; KAPPA-CARRAGEENAN; KONJAC GLUCOMANNAN; ANIONIC POLYACRYLAMIDE; SUBMICRON PARTICLES; PARTICULATE MATTER; SIZE DISTRIBUTION; TRACE-ELEMENTS; XANTHAN GUM; GELATION; FLOCCULATION;

D O I：

10.1016/j.fuel.2017.05.008

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Fly ash fine particles emitted from coal-fired power plants are the primary atmospheric pollutant in China. The pressure, temperature, and velocity distribution of the flow field in a chamber was simulated to evaluate chemical agglomeration. The effect on the removal efficiency of composition, concentration, pH, K+ content, and zeta potential of the chemical agglomeration solutions as well as surfactant and flue gas temperature were evaluated. The results suggested that suitable solutions could significantly improve the removal efficiency of fine particles. Among these, kappa-carrageenan performed best and achieved a removal efficiency of 47.1%. Synergism was detected as two different chemical agglomeration solutions were mixed together: a mixture of kappa-carrageenan and konjac glucomannan attained a removal efficiency of 59.3%, higher than their individual values. The efficiency improved initially and then decreased as the solution K+ concentration increased. Also surfactants affected agglomeration: cationic and nonionic surfactants enlarged the removal efficiency by 9.0% and 3.7%, respectively, whereas anionic surfactants lessened average removal efficiency by 5.6%. Zeta potential influenced the removal efficiency as well: it peaked as the zeta potential was around 0 mV. (C) 2017 Published by Elsevier Ltd.

引用

页码：557 / 569

页数：13

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