Common Problems and Solutions for Baghouse Dust Collectors (Part 2)

Low Fan Motor Current / Low Air Volume

Main causes and troubleshooting: 

1. High differential pressure of the dust collector: Refer to the above solutions. 

2. Reversed pulleys of fan and motor: Check the drawing and reverse the pulleys. 

3. Dust accumulation and blockage in pipelines: Clean the pipelines and inspect the gas flow rate. 

4. Closed fan damper: Open the damper and lock it in the open position. 

5. Closed hoist valve of the dust collector: Inspect the air circuit and open the valve plate. 

6. Excessively high system static pressure: Measure the static pressure at both ends of the fan and check the design specifications, adjust as needed. For high flow rates, 

inspect the pipelines and replace the original defective design. 

7. Fan not operating to design requirements: Inspect the fan inlet structure to ensure smooth air flow, check for blade wear and repair or replace as needed. 

8. Reverse fan rotation: Reverse the wiring on the motor.

Filter Bag Degradation

Main causes and troubleshooting: 

1. Filter media incompatible with working conditions: Analyze the chemical properties of the gas and consult the filter bag/cartridge manufacturer.

2.  Filter media unsuitable for gas composition: Treat the gas before it enters the dust collector, or replace the filter bags/cartridges.

3. Operation below acid dew point temperature: Raise the gas temperature.

Filter Bag Clogging

Cause analysis: 

1. Condensation caused by air leakage or low flue gas temperature, pipeline water leakage, and wet bags leading to dust adhesion. 

2. Excessively high filtration speed, overly fine or coarse dust, sticky dust properties, and poor filter bag cleaning.

3.  Too short pulse jet cleaning time and cycle. 

4. Insufficient pulse jet pressure resulting in weak blowing. 

Troubleshooting: 

1. Insulate or heat the dust collector, provide rain and air leakage protection. 

2. Reduce the filtration speed and control the cooling water spray volume before pre-dust collection and pulse jet cleaning.

3.  Observe the differential pressure and adjust the pulse jet time and cycle.

4.  Adjust the pulse jet pressure.

Excessive Filter Bag Wear

Main causes and troubleshooting: 

1. Worn-out flow distribution baffle: Replace the flow distribution baffle. Excessive dust: Install a primary dust collector. 

2.Over-frequent cleaning cycles: Extend the cycle time. 

3.Improper flow distribution of inlet gas by filter bags/cartridges: Consult the manufacturer.

4.Dust in clean air plenum/on tube sheet: Clean the tube sheet and the inside of filter bags/cartridges, conduct a fluorescent test to find leakage points. 

5. Burrs/corrosion on cage frame (if used): Smooth and remove burrs, replace if needed. If corroded, consider using a cage frame with anti-corrosion coating.