Filter cartridge dust collector; The adopted sinking flow layout and inclined filter cartridge structure, after the dust containing gas enters the dust collector ash hopper, due to the sudden expansion of the airflow section and the action of the airflow distribution plate, some coarse particles in the airflow settle in the ash hopper under the action of dynamic and inertial forces; After the dust particles with fine particle size and low density enter the dust filter chamber, they deposit on the surface of the filter material through a combination of Brownian diffusion and screening effects. The purified gas enters the clean air chamber and is discharged through the exhaust pipe and fan. The resistance of the filter cartridge dust collector increases with the increase of the thickness of the dust layer on the surface of the filter material. Clean the dust when the resistance reaches a certain specified value. At this time, the PLC program controls the opening and closing of the pulse valve. Firstly, the lifting valve of the first chamber is closed to cut off the filtered airflow. Then, the electromagnetic pulse valve is opened, and the compressed air expands in the upper box for a short period of time, flowing into the filter cartridge, causing the filter cartridge to expand and deform, generating vibration. Under the action of the reverse airflow brush, the dust attached to the outer surface of the filter bag is peeled off and falls into the ash hopper. After the dust cleaning is completed, the electromagnetic pulse valve closes, the lift valve opens, and the chamber returns to the filtering state. The cleaning process is carried out sequentially in each room, starting from the cleaning of each room and ending with the next cleaning cycle. The fallen dust falls into the ash hopper and is discharged through the ash removal valve.
When the resistance reaches a certain specified value, dust cleaning is carried out, and 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 is sprayed through the small hole on the spray pipe through the electromagnetic pulse valve
Inject a high-speed and high-pressure injection airflow, forming an induced defect flow equivalent to 1-2 times the volume of the injection airflow, which enters the filter cartridge together, causing instantaneous positive pressure and swelling and micro motion inside the filter cartridge; The dust deposited on the filter material falls off and falls into the ash hopper. The dust in the ash hopper is continuously discharged through the unloader. This pulse jet cleaning method involves sequentially cleaning the filter cartridges one by one. The pulse valve opens and closes once to generate a pulse action, which takes 0.1-0.2 seconds; The interval between two adjacent opening and closing of the pulse valve is 1-2 minutes, and the time required for all filter cartridges to complete one cleaning cycle is 10-30 minutes. Due to the low-pressure pulse cleaning function of this equipment, the injection pressure, injection interval, and injection cycle should be adjusted according to the resistance of the equipment.
The resistance increases with the thickness of the dust layer on the surface of the filter material. In order to ensure the normal operation of the system, the upper limit of the dust collector resistance should be maintained within the range of 1400-1600Pa. When this limit is exceeded, the PLC pulse automatic controller should issue instructions for dust cleaning through fixed resistance or timing.
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