Assessing Electrocyclone Performance in Collecting Smaller than 1 µm Silica Airborne Particles

Amjadsoroudi, Hossein; Ghormani shahna, Farshid; Bahrami, Abdorahman; Fardmal, Javad

Volume 6, Issue 1 (5-2013) ijhe 2013, 6(1): 45-54 | Back to browse issues page

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Amjadsoroudi H, Ghormani shahna F, Bahrami A, Fardmal J. Assessing Electrocyclone Performance in Collecting Smaller than 1 µm Silica Airborne Particles . ijhe 2013; 6 (1) :45-54
URL: http://ijhe.tums.ac.ir/article-1-5136-en.html

Assessing Electrocyclone Performance in Collecting Smaller than 1 µm Silica Airborne Particles

Hossein Amjadsoroudi¹

, Farshid Ghormani shahna ^*

², Abdorahman Bahrami³

, Javad Fardmal⁴

1- Department of Occupational Health Engineering, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
2- Department of Occupational Health Engineering, Faculty of Public Health and Research Center for Health Science, Hamadan University of Medical Sciences, Hamadan, Iran , fghorbani@umsha.ac.ir
3- Department of Occupational Health Engineering, Faculty of Public Health and Research Center for Health Science, Hamadan University of Medical Sciences, Hamadan, Iran
4- Department of Biostatics, Faculty of Health, Hamadan University of Medical Sciences, Hamadan, Iran

Abstract: (8051 Views)

Background and Objectives: Cyclone is one of the most utilized dust collectors for airborne particles control. It separates particles from airflow by centrifugal force. However, it is not effective in collecting very fine particles smaller than 10 μm in diameter. The aim of this study was to assess the performance of charging particles on cyclone efficiency in collecting particles smaller than 1 μm.
Materials and Methods: To achieve the above aim, a pilot air conditioning system equipped with conventional cyclone of Lapple model was designed and installed. A high voltage (18 KV) DC power supply was used for charging silica particle in corona charger. Isokinetic probe was used for particles sampling at upstream and downstream of cyclone under different study conditions and measurement was carried out using Grimm 1.08 dust counter.
Results: Charging fine airborne silica particles caused a significant increase in collection efficiency. There is a direct relationship between collection efficiency and charging voltage, so that the total particles collection efficiency was increased from 2.7 to about 72% with respect of increasing charging voltage from zero to 18 Kv. However, inlet air velocity has a negative effect on the collection efficiency of particles charged.
Conclusion: Applying electrocyclone in collecting fine particles smaller than 1 µm is more efficient compared with that of conventional cyclones.