Although bag dust collectors are widely used in various industrial dust removal scenarios and have the advantages of efficient and stable operation, they are bound to have problems such as bag damage, abnormal cleaning, and excessive emissions during long-term operation. Understanding the manifestations and troubleshooting methods of these common faults will help users deal with them in a timely manner and ensure the efficient operation of the equipment.
1. How to check if the filter bag is damaged?
The filter bag is the "heart" of the bag dust collector. Once damaged, the dust-containing gas will directly pass through the damaged part into the clean room or chimney, causing the emission concentration to increase rapidly.
The following are common methods for troubleshooting filter bag damage:
Abnormal emission monitoring
The most direct manifestation is the increase in the dust concentration at the outlet, the chimney "emitting dust" or obvious dust can be seen at the exhaust port. If the equipment is equipped with an online dust monitor, abnormalities can be quickly discovered.
Abnormal pressure difference fluctuations
After the filter bag is damaged, the local airflow is short-circuited, resulting in an abnormal decrease in the system pressure difference. If the pressure difference suddenly decreases, it may be that the filter bag is broken, causing the airflow to bypass the filter layer.
Physical inspection
After shutting down, open the inspection door and check the appearance of the filter bags one by one to see if there is ablation, wear, deformation or tear. You can also use a flashlight to observe whether there is light penetrating the filter bag.
Dye or smoke test
You can add harmless fluorescent powder, dye powder or smoke to the air inlet, and observe whether there are visible particles escaping from the clean air chamber to determine whether the filter bag is leaking and its location.
2. Common faults and countermeasures of bag dust collectors
In addition to bag damage, bag dust collectors also have the following common faults:
Incomplete cleaning
It manifests as a continuous increase in pressure difference, filter bag blockage, and increased equipment resistance. The main reasons may be insufficient injection pressure, damage to the solenoid valve, or blockage in the injection pipe. Check whether the pulse valve is operating normally and whether the nozzle is blocked. Clean or replace parts if necessary.
Pressure difference is too low or too high
Too low may be caused by bag damage or system leakage, and too high may be caused by bag blockage, failure to clean in time, or excessive air flow. The system sealing and cleaning frequency settings should be checked.
Severe accumulation of dust in the hopper
If the dust is not discharged for a long time or the dust discharge valve is stuck, it will cause dust backflow, excessive dust accumulation at the bottom of the filter bag, causing wear and even blockage of the filter bag. It is necessary to check whether the dust discharge device is operating normally.
Failure of the electronic control system
If the controller fails or the program is disordered, it will cause irregular spraying or shutdown. The PLC control system, line connection, sensor sensitivity, etc. should be checked regularly.
Conclusion:
Although the bag dust collector has superior performance, its operating stability depends on the good coordination of the filter bag status, the cleaning system and the control device. It is not terrible for the filter bag to be damaged. The key is to find it early and deal with it quickly. By establishing a daily inspection system, configuring intelligent monitoring equipment, and regularly maintaining the cleaning and unloading system, common faults can be effectively avoided, the equipment life can be extended, and the environmental protection compliance rate can be improved.