Under negative pressure, the dust containing gas in the DDF large bag type back blowing dust collector enters the lower ash hopper through the inlet duct. A baffle is installed on the front of the inlet duct. Coarse dust falls into the ash hopper by collision and gravity, while fine particle dust is filtered by the filter bag and adsorbed on the inner wall of the filter bag. The purified gas passes through the bag filter chamber and is drawn into the fan through the exhaust pipe through the top switching valve of the equipment, and then discharged into the atmosphere through the exhaust pipe.
When the dust attached to the filter bag continues to increase and the resistance rises to the specified value, the cleaning process begins. The cleaning method of the DDF large bag type back blowing dust collector relies on the single chamber back blowing method. During the back blowing process, a reversing valve is used to close the exhaust pipe, open the back blowing pipe, and cut off the exhaust of the single chamber. Because the inlet ducts of each room of the equipment are connected and in a negative pressure state, the negative pressure suction effect of adjacent rooms is utilized. The airflow is sucked into the filter bag chamber through the anti blowing pipe, passes through the filter bag, enters the inner side from the outer side of the filter bag, and is sucked into the adjacent chamber through the ash hopper and the inlet pipe of the chamber for discharge. At this time, the filter bag is sucked in and deflated. The accumulated dust inside the filter bag is then shaken off to the lower dust resistance ash hopper, completing the cleaning of the single chamber. Under the control of the cleaning actuator, the same sequence of cleaning is carried out in the chamber. When the cleaning reaches a certain value, the cleaning stops. Refer to the working principle diagram of the dust collector.
DDF large-scale bag back blowing dust collectors are widely used in enterprises such as steel mills, smelters, cement plants, carbon black plants, and power plants for purifying and recovering smoke and dust generated from smelting, crushing, screening, and combustion. The DDF large-scale bag back blowing dust collector is an excellent equipment that protects the physical and mental health of operators and people, reduces costs for crop growth, mechanical equipment wear and tear, social environmental pollution, and the recycling and utilization of useful dust.
Structural characteristics of DDF large bag back blowing dust collector:
1. The cleaning method of the DDF large bag type back blowing dust collector relies on the single chamber back blowing method. During the back blowing process, a reversing valve is used to close the exhaust pipe, open the back blowing pipe, and cut off the exhaust of the single chamber.
2. When the dust attached to the filter bag continues to increase and the resistance rises to the specified value, the cleaning process begins.
3. The accumulated dust inside the filter bag is shaken off and settled in the settling ash hopper, completing the cleaning of a single chamber. The other chambers are cleaned in the same sequence under the control of the cleaning actuator, and the cleaning stops when the value is reached.
4. Because the inlet ducts of each room of the equipment are connected and in a negative pressure state, the negative pressure suction effect of adjacent rooms causes the airflow to be sucked into the filter bag chamber through the anti blowing duct. Through the filter bag, the airflow enters the inner side from the outside of the filter bag, passes through the ash hopper and the inlet duct of the room, and is sucked into the adjacent room for discharge. At this time, the filter bag is sucked in and deflated.