Principle of cartridge filter

- Jan 09, 2020-

 

Principle of cartridge filter


After ash hopper in the dusty gas into the dust, because of air flow section will expand, there will be some particles in air flow, bulky, the effect of gravity and inertia force will decline, if the size is fine, the density of small dust particles, as it enters the filter chamber through the diffusion and brown screen and other comprehensive effect, make the dust deposition on the surface of the filter material, after purification, the air chamber by the exhaust gas into the net by the fan discharge.  


The resistance of the filter cartridge dust collector increases with the increase of the dust layer thickness on the filter surface. When the resistance reaches a specified value, the dust is cleaned. At this point, the pulse controller controls the opening and closing of the electromagnetic pulse valve. When the pulse valve is opened, the compressed air in the air bag ejects a high speed and high pressure ejector air through the pulse valve through the holes in the jet tube, thus forming an induced defect flow equal to 1 ~ 2 times the volume of the ejector air, which together enters the filter barrel, causing instantaneous positive pressure in the filter barrel and causing swelling and fretting; The dust deposited on the filter material falls off and falls into the dust hopper. The dust in the dust hopper is discharged continuously through the unloader.  


This kind of pulse jet ash removal method is the sequential ash removal of filter cylinder one by one. The pulse valve opens and closes to produce one pulse action at a time, and the required time is 0.1 ~ 0.2s. The interval between the opening and closing of two adjacent pulse valves is 1 ~ 2min, and the time required for all filter cylinders to complete a cleaning cycle is 10 ~ 30min. Since the equipment is low-pressure pulse ash removal, according to the resistance of the equipment, the injection time should be extended, and the injection interval and injection cycle should be shortened.  

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