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The principle Air box pulse bag filter

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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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