標題: High-efficiency wet electrocyclone for removing fine and nanosized particles
作者: Lin, Guan-Yu
Le-Thi Cuc
Lu, Wei
Tsai, Chuen-Jinn
Chein, Hung-Min
Chang, Fang-Tang
環境工程研究所
Institute of Environmental Engineering
關鍵字: Deutsch-Anderson equation;Particle control;Nanoparticles;Wet electrocyclone
公開日期: 9-八月-2013
摘要: This study designed and tested a wet electrocyclone with high efficiency for long-term operation. The inner diameter of the collection electrode is 25 cm, and the discharge electrodes consist of seven circular discs with zigzag-shaped edges for particle charging and removal. The tip of the circular saw-type discs is 20 pin in diameter and the tip to the inner wall (collection electrode) spacing is 4 cm. Cleaning water near the inter wall was used to keep the collection electrodes clean. Experimental results showed that the collection efficiency of the present wet electrocyclone decreased with an increasing air flow rate. The efficiency for oleic acid (OA) particles was reduced only slightly from 78-92% to 75-90% for particles from 22.1 to 805 nm in electrical mobility diameter (d(p)) after 6 h of micro-Al2O3 loading test. In the field test, the collection efficiencies of the present wet electrocyclone for submicron SiO2 particles with mass concentration of 20-50 mg/m(3) were also found to keep higher than 93% for continuous 14-day operation. A modified Deutsch-Anderson model was developed to predict the charged particle collection efficiency (eta(elec,p), %) of nanoparticle as well as larger particles. The present model is eta(elec,p) (%) = 1 - exp{-[A(N-De(B)) + C(N-De) + D]} x 100%, where A, B, C and D are regression coefficients, and N-De is the modified Deutsch number. Good agreement was obtained between the present predictions and experimental data. (C) 2013 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.seppur.2013.04.039
http://hdl.handle.net/11536/22118
ISSN: 1383-5866
DOI: 10.1016/j.seppur.2013.04.039
期刊: SEPARATION AND PURIFICATION TECHNOLOGY
Volume: 114
Issue: 
起始頁: 99
結束頁: 107
顯示於類別:期刊論文


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