Common fault analysis of pneumatic pulse bag filter: Pneumatic pulse bag filter belongs to a type of bag filter. The main body of the pneumatic pulse bag filter is divided into several box areas, with 32, 64, 96 filter bags in each box. There is a lifting valve driven by a cylinder on the outlet pipe on the side of each box. When the dust collector is filtering the dusty gas, the dust cleaning controller will send a signal, and the lift valve of each chamber will start to close and cut off the filtered airflow; Then the pulse valve in the chamber is opened, and compressed air greater than 0.4 MPa is injected into the clean air chamber to remove the dust on the filter bag; After this action is completed, the lift valve will reopen, allowing the chamber to resume filtering work, and complete all dust cleaning actions one by one according to the above procedure. The pneumatic pulse bag filter adopts a separate chamber for dust cleaning. During dust cleaning, each box is isolated and rotated. The pulse and cleaning cycle of each compartment are automatically and continuously carried out by the cleaning program controller according to the pre-set program, thus achieving the effect of compressed air cleaning. The entire box design adopts an outlet main pipe structure, and the ash hopper can be extended below the main pipe, allowing the incoming dusty flue gas to directly enter the expanded ash hopper to achieve the effect of pre dust removal. So the gas box pulse bag filter can not only handle dust containing gases of general concentration, but also handle dust containing gases. 1、 The diaphragm of the electromagnetic pulse valve is damaged. At this time, all pulse valves of the pneumatic bag filter are not working, the air bag pressure drops to zero, the cylinder closes, the pressure difference of the dust collector continues to increase, and the ventilation volume decreases. 2、 The pressure balance hole of the electromagnetic pulse valve is blocked. The blockage of the air pressure balance hole of the electromagnetic pulse valve is mainly caused by two reasons. 3、 The compressed air of the bag type pulse dust collector contains a lot of oil and water; When installing compressed air pipelines, foreign objects such as rust and welding slag inside the pipelines were not cleaned thoroughly. Dust removal effect of gas box pulse bag filter: The gas box pulse bag filter uses separate box rooms for dust cleaning. During dust cleaning, each box is isolated and rotated. The pulse and cleaning cycle of each compartment are automatically and continuously carried out by the cleaning program controller according to the pre-set program, thus achieving the effect of compressed air cleaning. The entire box design of the Flender gas box pulse bag dust collector adopts a structure with an outlet main pipe. The ash hopper can be extended below the main pipe, allowing the incoming dusty flue gas to directly enter the expanded ash hopper to achieve the effect of pre dust removal. So the gas box pulse bag filter can not only handle dust containing gases of general concentration, but also handle dust containing gases. As the filtration process continues, the amount of dust adhering to the outer surface of the filter bag increases, and the operating resistance of the dust collector increases. The conversion valve of a certain filtration unit closes, and the filtration unit stops working. Compressed air is blown back into the filtration unit to blow off the dust on the outer surface of the filter bag. Then, the conversion valve plate opens, and the filtration unit resumes operation, and the cleaning of dust shifts to the next filtration unit. The entire dust cleaning process is carried out alternately by each filtering unit. Characteristics of the pneumatic pulse bag filter: 1. The dust removal efficiency can reach over , and the dust emission can be controlled below 30mg/Nm3. 2. Can handle dust below 100g/Nm3. 3. The sealing measures have an air leakage coefficient of less than 2%. 4. The structural design has a large filtration area per unit volume and a small equipment volume. 5. Dust cleaning method extends the service life of filter bags. 6. Key parts have a long service life. 7. Stable performance, high degree of automation, and simple daily maintenance and management.
