The working principle of the reverse blow bag dust collector for sand treatment in the foundry produced by Hebei Feixiang Environmental Protection Equipment Co., Ltd. is as follows: the dust containing gas enters the ash hopper through the inlet pipe, is purified by the filter bag in the box, and is discharged to the outlet pipe through the main valve plate opened by the electric three-way valve. The gas in the outlet pipe is then discharged into the atmosphere through the centrifugal fan and chimney.
As the working time increases, the thickness of the dust layer on the inner wall of the filter bag gradually increases, and the resistance also gradually increases. When the resistance increases to 80-120 millimeters of water column (as can be seen by the U-shaped pressure gauge), the electric cylinder starts to use the main valve plate of the electric three-way valve to close, and the auxiliary valve plate to open for reverse blowing and dust cleaning.
After the blowback air enters the box through the electric three-way valve, it passes through the filter bag in the opposite direction compared to the filtered state. At the same time, the high-frequency electric vibrator starts to operate, causing the filter bag to vibrate at high frequencies. Under the simultaneous action of blowback and high-frequency vibration, it has the effect of cleaning dust (the cleaning time is adjustable). When the dust cleaning is completed, the high-frequency electric vibration stops vibrating. The main valve plate of the electric three-way valve is opened, and the auxiliary valve is closed at the same time, restoring the normal filtering state. The adjacent interval time for cleaning can be adjusted as needed to ensure that each box is cleaned in the specified time sequence.
The dust cleaning system of the back blowing bag filter adopts high-frequency vibration and back blowing. The back blowing is achieved by a designed electric motor driving a three-way valve, and the action of the electric cylinder is controlled by a set of automatic control system.
Welcome to choose our company's bag filter for sand processing in our foundry.
