Working principle of plenum pulse bag type collector When dust-laden gas enters the dust store bin from the inlet, some heavier dust drops into the dust store bin as a result of habitual collision and free settling, large amount of dust follow the rising air current and enter into the inside of bag compartment. Dust is detained outside the filter bag after being filtered by filter bags, and the purified gas goes into the bag compartment from inside the filter bag, then discharged into the air through the hole of the valve board and the outlet. As it goes on and on, the dust detained outside the filter bag increases, so it causes operating resistance of dust collector rising. If the resistance rises to the pre-set number(1245-1470Pa), the controller will send out signals, first to control the lift valve to do these operations: close the hole of the valve board to cut air current and stop filtering, and then to open the electromagnetic pulse valve to blow compressed air whose pressure is 0.5-0.7Mpa into filter bag with a short time(0.01-0.12s). The compressed air immediately expands and swarms into filter bag, that make the bag to distort and vibrate, adding the effect of adverse air current, the dust detained outside of filter bag is dropped into the dust store bin. After the de-dusting is finished, lift valve open again, and dust collector begin filtering once more. Plenum pulse bag type collector is made up of several compartments, where de-dusting is in order, and this is compartment-by-compartment off-line de-dusting. Its advantages are that the de-dusting compartment and the filtering compartment do not interfere each other, help realizing long-term consecutive operating and improve de-dusting effect.
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