To prevent bag filter failure, you must size the filter right for the job. Also, you must inspect and maintain it often. And, you must ensure that it is installed correctly. If a bag filter fails, it’s key to quickly find the cause. Then, take action to stop more issues.
The reasons for the bag-dust collector’s weak back-blowing
①Fan itself is faulty;
②Fan speed cannot be reached;
③The back-blowing air pipe is leaking;
④The gap between the back-blowing port and the bag opening is too large or not aligned.
What caused the failure of the dust discharge device in the bag dust collector?
① Failure of the transmission motor, reducer and transmission gear;
② The transmission chain is broken;
③ The chain is out of oil;
④ The safety pin is broken;
⑤ The chain is too loose;
⑥ The spiral connecting pin is broken;
⑦ Dust is fixed in the spiral casing;
⑧ The spiral blade is damaged;
⑨ The rotary valve blade is broken;
⑩ Foreign matter is entangled in the rotary valve;
⑪ The spiral blade is worn;
⑫ The spiral blades are full of fixed dust;
⑬ The fixed dust on the inside of the casing rubs against the blades;
⑭ The discharge port is blocked by dust;
⑮ The dust in the ash hopper is blocked;
⑯ The rotary valve blade is full of fixed dust.
What is causing the decline in bag dust collector fan performance?
① The speed is reduced due to insufficient frequency;
② The impeller is worn or damaged;
③ The valve does not work properly;
④ The filter bag resistance is too large.
What is causing the abnormal vibration of the bag dust collector fan?
①Imbalance due to impeller wear or damage;
②Imbalance due to dust adhering to the impeller;
③Shaft bending;
④Unbalanced coupling;
⑤Collision and friction between the rotor and the casing;
⑥Incomplete contact of the sealing gland;
⑦Pressure fluctuation and surge.
Why can’t the dust in the hopper of the bag dust collector be emptied?
① The dust at the bottom of the ash hopper is blocked;
② The rotary conveyor fails;
③ The rotary valve does not work properly;
④ Dust solidifies;
⑤ The discharge chute is blocked;
⑥ The dust is wet and adheres to the dust, making it difficult to fall.
The causes and treatments for bag filter blockage in bag dust collectors
Filtering bag blockage is the main cause of filter bag damage and dust collector failure.
The blockage is caused by water leakage. You should fix it by drying and cleaning it again.
The bag is hanging incorrectly. It is too loose. This causes blockage. The hanging method needs improvement.
The filter bag is jammed. This is due to an excessive filtration speed. The air volume needs to be adjusted.
The filter bag is blocked because the dust is too wet. Improving insulation and heating.
Blockages in the bag are the result of poor cleaning. To fix this, improve the cleaning device or do more manual cleaning.
What is the reason for the damage of bag filter bag and how to deal with it
Once the dust bag is damaged, the dust collection effect will be greatly reduced. If the filter bag is seriously damaged, it will lose its dust collection function. It shows as constant “dust emission” at the discharge port. Or, as “dust emission” when cleaning.
The filter bag frame has uneven welding. This causes burrs, edges, or friction with the box body. These wear or puncture the filter bag during shaking. Treatment method: trim the frame; adjust the filter bag installation method.
Due to the excessive looseness of the filter bag hanging, the filter bag is damaged. Treatment method: improve the quality of the hanging bag work.
The metal edges collide with the filter bag during removal or installation. This causes hidden injuries and damage during use. Method for treatment: watch all links before and after installing the filter bag. This prevents sharp tools from damaging it.
Due to the short or long cleaning cycle, or when manually poking the ash, the iron tool damages the bag. Treatment method: adjust the cleaning cycle and try not to manually poke the ash.
The bag has too much dusty gas and faces high winds. This strains the bag and damages it early. Treatment method: appropriately adjust the air volume and reduce the filtration wind speed.
The filter bag is burned due to the high exhaust gas temperature and poor filter bag material. The treatment method has three parts. First, control the inlet temperature. Second, add a temperature control device. Third, improve the filter material. For example, use glass expanded yarn filter cloth as a filter bag.
What is the reason for the malfunction of the bag dust collector cylinder?
① The solenoid valve does not work properly;
② Leakage;
③ Piston rod rusts;
④ Poor stroke;
⑤ Damage to the compressed air pipeline;
⑥ Cracks and separation at the joint of the compressed air pipeline;
⑦ Insufficient compressed air pressure;
⑧ Pressure is not reached;
⑨ Piston rod breaks;
⑩ Poor sealing packing.
What is the reason for poor cleaning of bag dust collector?
① The filter bag is too tight;
② The filter bag is loose;
③ The dust is damp;
④ The filter bag expands during cleaning. This happens when the reversing valve is not well sealed or has a malfunction.
⑤ The cleaning mechanism has a malfunction;
⑥ The cleaning valve has a malfunction;
⑦ The cleaning timer has an incorrect setting value or has a malfunction;
⑧ Insufficient backwash air volume.
What is the reason for the abnormal increase in bag dust collector resistance?
① The reversing valve does not work properly and the air leakage is large;
② The back-blowing valve does not work properly and the air leakage is large;
③ The back-blowing air volume regulating valve fails and is poorly adjusted;
④ The back-blowing air volume regulating valve is blocked;
⑤ The timing of the reversing valve and the back-blowing valve is inaccurate;
⑥ The back-blowing pipe is blocked by dust;
⑦ The reversing valve is not sealed properly;
⑧ The gas temperature changes and makes cleaning difficult;
⑨ The cleaning mechanism fails;
⑩ The dust humidity is high, blocking or poor cleaning occurs;
⑪ The cleaning timer is set incorrectly;
⑫ The vibration mechanism does not work properly;
⑬ The compressed air pressure for the cylinder is reduced;
⑭ The solenoid valve for the cylinder does not work properly;
⑮ A large amount of dust accumulates in the ash hopper;
⑯ The air volume is too large;
⑰ The filter bag is blocked;
⑱ The filter bag is wet due to water leakage.
