Periodic filter cleaning by pulse-jet injection of highly pressurized air affects the filter life time and the overall filtration performance. It was programmed that jet air
generated from a compressor should be injected into the individual filter bags upon reaching the maximum allowable pressure drop of 100 mmH2O. While the jet air passes
counter-currently to the flue gas stream, the particulate matters deposited on outer surface of the filter bags could be detached and dropped down in gravity. Fig. 4 shows the variation of pressure drop of the PG filter and the commercial laminated membrane filter during dust filtration with jet pulsing. The injection interval of the jet air became shorter as filtration proceeded