AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
The Change of Pressure Drop during Dust Loading at Different Relative Humidity
MYONG-HWA LEE, Jeong-Uk Kim, Korea Institute of Industrial Technology
Abstract Number: 65 Working Group: Control Technology
Abstract Bag house is generally used to remove particulate matters and to recover valuable powders from a gas stream. Bag filter is the most important component to determine the system performance. However, its performance depends on relative humidity in a gas stream. Therefore, the change of pressure drop by relative humidity during dust loading in a filter was investigated in this study. Fly ash particles were used as test particles, and a polyester filter was used to collect those test particles under different relative humidity. We found that pressure drop decreased with increasing relative humidity at the same mass areal density. Adhesive force between particles increased with increasing relative humidity, which changed the dust cake structures. At high relative humidity, dendritic structure by adhesive force lowered the pressure drop because it decreased drag force. Furthermore, overall collection efficiency increased with increasing relative humidity, resulting from enhanced condensation of fly ash particles.
Acknowledgement
This work was financially supported by the RCOE Project (Project NO. EO150006) through Korea Institute of Industrial Technology, Republic of Korea.