Abstract:Pulse-jet cleaning for filter cartridge regeneration is essential to realize stable, effective, and long-term operation of dust collectors. Numerical studies on pulse-jet cleaning are commonly based on clean filters and give insignificant consideration of the impact of dust cake loaded on the filter cartridge on the cleaning. To address this, this work investigates the effect of dust cake loaded on the filter cartridge on the performance of pulse-jet cleaning. A CFD numerical model for pulse-jet cleaning was established to simulate the jet airflow field, which is verified by an experiment. Results show that the pulse jet pressure accumulated from the bottom to the top of the filter cartridge. With more dust cake covered on the filter cartridge, higher pressure inside the filter cartridge, greater pulse-jet cleaning intensity, better uniformity, and decreased pulsed jet airflow penetrating the filter were observed. Compared to the case whereby the dust cake was fixed (not peeled off during the pulse-jet cleaning process), the airflow obviously increased in the later period of pulse jetting by considering dust cake peeling off during cleaning. The pulse-jet cleaning performance by considering the dust cake peeling off was between those with fixed loaded dust cake and with clean filter cartridge and closer to the former case. This study can provide references for the design of pulse-jet cleaning dust collectors. Key words:dust collector/ filter cartridge cleaning/ pulsed jet/ dust cake/ numerical simulation/ computational fluid dynamics.
图1实验系统示意图 Figure1.Schematic diagram of experimental system
LI J L, WANG P, WU D S, et al. Numerical study of opposing pulsed-jet cleaning for pleated filter cartridges[J]. Separation and Purification Technology, 2020, 234: 116086. doi: 10.1016/j.seppur.2019.116086
[12]
FERER M S, DUANE H. A simple model of the adhesive failure of a layer: Cohesive effects[J]. Journal of Applied Physics, 1997, 81(4): 1737-1744. doi: 10.1063/1.365272
[13]
SIEVERT J, LOFFLER F. Fabric cleaning in pulse-jet filters[J]. Chemical Engineering & Processing Process Intensification, 1989, 26(2): 179-183. doi: 10.1016/0255-2701(89)90010-X
WU Q Q, LI J L, WU D S, et al. Effects of overall length and od on opposing pulse-jet cleaning for pleated filter cartridges[J]. Aerosol and Air Quality Research, 2020, 20: 432-443. doi: 10.4209/aaqr.2019.10.0527
School of Resources, Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China Received Date: 2020-07-05 Accepted Date: 2020-10-05 Available Online: 2021-03-24 Keywords:dust collector/ filter cartridge cleaning/ pulsed jet/ dust cake/ numerical simulation/ computational fluid dynamics Abstract:Pulse-jet cleaning for filter cartridge regeneration is essential to realize stable, effective, and long-term operation of dust collectors. Numerical studies on pulse-jet cleaning are commonly based on clean filters and give insignificant consideration of the impact of dust cake loaded on the filter cartridge on the cleaning. To address this, this work investigates the effect of dust cake loaded on the filter cartridge on the performance of pulse-jet cleaning. A CFD numerical model for pulse-jet cleaning was established to simulate the jet airflow field, which is verified by an experiment. Results show that the pulse jet pressure accumulated from the bottom to the top of the filter cartridge. With more dust cake covered on the filter cartridge, higher pressure inside the filter cartridge, greater pulse-jet cleaning intensity, better uniformity, and decreased pulsed jet airflow penetrating the filter were observed. Compared to the case whereby the dust cake was fixed (not peeled off during the pulse-jet cleaning process), the airflow obviously increased in the later period of pulse jetting by considering dust cake peeling off during cleaning. The pulse-jet cleaning performance by considering the dust cake peeling off was between those with fixed loaded dust cake and with clean filter cartridge and closer to the former case. This study can provide references for the design of pulse-jet cleaning dust collectors.