The dust remover plays an important role in the treatment of atmospheric pollution. During the daily operation of the bag filter, due to certain changes in the operating conditions, or some failures, it will affect the normal operation of the equipment and work performance, and it is necessary to conduct regular inspections and appropriate adjustments.
The dust remover plays an important role in the treatment of atmospheric pollution. During the daily operation of the bag filter, due to certain changes in the operating conditions, or some failures, it will affect the normal operation of the equipment and work performance, and it is necessary to conduct regular inspections and appropriate adjustments. The purpose is to extend the life of filter bags, reduce power consumption and recycle useful materials.
First, the operating record
Every ventilation and dust removal system must be installed and equipped with the necessary test instruments. In daily operation, it must be measured regularly and accurately recorded. This can be judged according to the pressure difference of the system, the gas temperature of the inlet and outlet, the value and change of the voltage, current of the main motor, etc., and the fault can be discharged in time to ensure its normal operation. The problems found through records are: The working conditions of the dust removal mechanism, the working conditions of the filter bags, and the changes in the air volume of the system.
Second, fluid resistance
The pressure difference can be used to determine the operating conditions: If the pressure difference increases, it means that the filter bag is clogged, the water vapor on the filter bag is condensing, the cleaning mechanism is ineffective, the dust accumulation in the ash hopper is too large, the filter bag is blocked, and the gas flow increases. A decrease in the pressure difference means that the filter bag has been broken or loosened, the intake side duct is blocked, or the valve is closed. There are leaks between the cabinets or sub-chambers, and fan speeds slow down.
Third, security
Bag dust collectors should pay special attention to measures to prevent combustion, explosions and fire accidents. When dealing with combustion or high-temperature gases, incomplete combustion of dust, sparks, burning and explosive gases, etc. often enter the system, and some of the dusts have the property of spontaneous ignition or charging, and most of the materials of the filter materials are all of them are flammable and frictionally prone to accumulate static electricity. Under such operating conditions, there are hazards of burning and explosion accidents. The consequences of such accidents are often very serious. It should be well considered to adopt fire prevention and explosion protection measures.
1. Install a combustion chamber or Mars trap in front of the dust collector to completely burn unburned dust and gas or trap Mars.
2. Take measures to prevent the accumulation of static electricity. Each part is grounded with a conductive material, or conductive fibers are added during the manufacture of filter media.
3. To prevent the accumulation or accumulation of dust, so as to avoid spontaneous combustion and explosion of dust.
4. Before entering the bag room or piping inspection or maintenance, be sure to ventilate and prevent CO poisoning.
Fourth, stop the job precautions
Before the bag filter stops running, in addition to the need for thorough cleaning, attention should also be paid to the following issues.
1.Moisture condensation often occurs in the bag room, which is caused by the presence of moisture-containing gas, especially the cooling of gases produced by combustion. Therefore, before the system is cooled, the moisture-containing gas is discharged and the dry air is completely replaced. That is, after the process equipment is stopped, the exhaust fan of the bag filter should be operated for a period of time before it is stopped.
2. During the period of long-term shutdown, adequate attention shall be paid to the cleaning and rust prevention of the fan to prevent dust and rain from entering the bearing. Before the operation is stopped, the dust in the ash hopper should be removed.
3. During the stoppage of the bag filter, regular short-time operation (air running) is the best maintenance method to ensure the normal operation of the dust removal system.