Daily maintenance and dust removal of bag pulse dust collector
During the trial operation of the new bag filter, special attention should be paid to check the following points:
1) The direction of rotation, speed, bearing vibration and temperature of the fan.
2) Whether the disposal air volume and the pressure and temperature of each test point are consistent with the design.
3) The device status of the filter bag, whether there is any occurrence of bag drop, loose mouth, abrasion, etc. after use, can be judged by visual inspection of the discharge status of the chimney after it is put into operation.
4) Pay attention to whether there is condensation in the bag room and whether the ash discharge system is unblocked. Avoid infarction and corrosion attacks. When the fouling is serious, it will affect the efficiency of the host.
5) Adjustment of the cleaning cycle and cleaning time. This work is an important factor affecting the performance and operation of dust collection.
6) If the cleaning time is too long, the attached dust layer will be removed, which will be the cause of leakage and damage of the filter bag. If the dust removal time is too short and the dust on the filter bag has not yet been removed, the filter operation will be resumed. The resistance will quickly recover and gradually increase, which will ultimately affect the application effect. At the beginning of the operation, some unexpected conditions are often present, for example, abnormal temperature, pressure, moisture, etc. will cause damage to the new installation.
The test operation of the equipment directly affects whether it can be put into normal operation. If it is not handled properly, the bag filter may quickly lose its efficacy. Therefore, it is necessary to be careful and cautious to do a good job in the test operation of the equipment.
- Frequently check the operation status of control valves, pulse valves and timers, etc.
The failure of the impulse valve rubber diaphragm is a common phenomenon, which directly affects the cleaning effect. This equipment belongs to the external filter type, and the bag is equipped with a skeleton. It is necessary to check whether the parts fixing the filter bag are loose, whether the tension of the filter bag is appropriate, and whether the supporting frame is smooth to avoid abrasion of the filter bag. Compressed air is used for dust removal, so oil mist and water droplets need to be removed, and the oil-water separator must be cleaned frequently.
- Avoid condensation
During use, it is necessary to prevent the gas from cooling below the dew point in the bag chamber, especially when using the bag filter under negative pressure. Because the shell often leaks air, the air temperature in the bag room is lower than the dew point, and the filter bag will be damp, causing dust to adhere to the filter bag, blocking the fabric holes, resulting in a cleaning failure, and causing a pressure drop in the dust collector If it is too large, it cannot continue to operate, and some generate paste bags and cannot remove dust.
To avoid condensation, the temperature of the gas in the dust collector and its system must be 25～35℃ higher than the dew point (such as the dew point temperature of the kiln-grinding integrated machine is 58℃, and the operating temperature should be above 90℃) to ensure Good use effect of filter bag.