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Can the service life of the P84 filter bag be effectively controlled?

Can the service life of the P84 filter bag be effectively controlled?

The P84 filter bag uses it as the raw material to make felt by needle punching method, and then through special treatment to obtain P84 filter felt.

Ways to improve the life of P84 filter bag:

1. Problems that should be paid attention to in manufacturing and installation:

The processing accuracy of the P84 filter bag, the design and processing of the bag cage should minimize the curvature of the filter bag, the distance between the pipe and the bottom plate should be accurate, and the tightness of the shell should be strictly enforced during the installation process. The processing accuracy of the bag is as follows: The size of the filter bag for the low-pressure long-bag pulse bag filter is basically in the range of 5M~7m. Due to the length of the filter bag, the distance between the bag and the shell wall is to prevent the filter bag from contacting, but The casing is too large and the investment is increased. The processing accuracy of the flower board will directly affect the verticality of the filter bag and the concentricity of the nozzle. The processing requirements mainly include three aspects to control the quality:

[1] The hole spacing of the flower plate is controlled at ±1mm, and CNC plasma cutting is required to achieve the accuracy.

[2] The deformation of the flower plate should be controlled within 1/1000, which requires at least 6mm of steel plate thickness, and specific stiffeners for rigidity, while the welding deformation in the welding process is controlled within a small range.

[3] The flatness of the flower plate should be controlled within ±2mm/square meter. All these regulations are for the filter bag to reduce collision.

[4] The design and processing of the bag cage should minimize the distortion of the filter bag:

The design and processing of the bag cage should minimize the distortion of the filter bag, mainly through several aspects:

[1] Make the fit between the filter bag and the bag cage as appropriate as possible, not too loose or too tight, and adapt to the filter bag before the bag cage is mass-produced.

[2] The vertical ribs of the cage generally use 20-24 carbon steel, each rib is Φ3.2 mm thick, the inner ring of the cage uses Φ4 mm thick carbon steel, the cage ring upward from the bottom of the cage and the cage bottom have The spacing of 50 mm, the distance between the two cage rings and the root of the cage should be less than 155 mm, and so on, the distance between one cage ring and the top flange bottom of the cage should be 50 mm. In addition, the processing quality requirements of the bag cage are also very important. The ring-making and processing spot welding equipment should be used to minimize burrs during processing and maintain verticality.

2. In the installation process, the tightness of the shell should be strictly:

In the installation process, the tightness of the shell should be strictly enforced, especially the airtightness between the dust-containing room and the clean air chamber. After the installation of the filter bag, the amphoteric powder inspection must be carried out to isolate the dust-containing room and the clean air chamber. The air leakage rate of the entire bag filter.

3. The distance between the spray tube and the flower plate is calculated accurately:

The distance between the spray tube and the flower plate is calculated accurately according to the nozzle form and diameter. The deviation of the nozzle and the bag axis should be controlled within ±1mm, otherwise it is easy to cause eccentricity during spraying, which will directly cause local wear of the filter bag, and Affect the life of the filter bag.