Effects of cleaning mode on the performances of pulse-jet cartridge filter under varying particle sizes

Abstract

In order to solve the problem of pollution induced by particulate matters, bag filters and pleated cartridge filters have been widely applied to industries. However, the effects of cleaning mode on the performances of filters under varying particle sizes are rarely studied. In this paper, the influence of cleaning mode on the pressure drop and dust emission concentration under varying particle sizes were studied through experiments. The results show that the smaller the particle size is, the faster the pressure drop increases, and the higher the dust emission concentration becomes. In the cleaning process, the smaller the particle size, the greater the residual pressure drop, and the worse the cleaning effect. The cleaning frequency rises with the decrease of particle size under the clean-on-demand (C-D) mode, while the maximum pressure drop grows with the decrease of particle size under the clean-on-time (C-T) mode. For the medium and fine particulate matters, the average dust emission concentration and the average pressure drop under the C-D mode are both slightly larger than those under C-T mode. By comparing the quality indexes under different cleaning modes, it can be found that for medium and fine particulate matters, the use of the C-D mode can ensure more excellent filtration and cleaning performances, while for large particulate matters, the choice between the two modes has very limited influence on the filtration and cleaning performances of pulse-jet cartridge filters.