To maintain the stable operation of the mobile dust collector, it not only requires regular maintenance, but also operates in accordance with the correct start and stop sequence and management requirements. Whether the equipment is running properly will directly affect the dust collection capacity, filtration resistance, dust removal efficiency and filter material service life.

1. Operation and management requirements for mobile dust collectors

1. Timely clean up dust: Regularly clean dust collection buckets, ash hoppers, dust suction pipes and equipment surfaces to avoid dust accumulation affecting the air volume and on-site environment.

2. Establish a maintenance system: Develop daily inspection, regular maintenance and troubleshooting plans based on the frequency of equipment use, and detect and handle abnormalities in a timely manner.

3. Check the filter components: When the filter bag or filter cartridge is damaged, blocked, deformed or aged, it should be cleaned or replaced in time.

4. Check the sealing status: Regularly check the access doors, flanges, measuring holes, air ducts and connections to prevent air leakage or blockage.

5. Check wearing parts: Regularly check the fan belt, bearings, impeller, motor and switch device, and deal with them promptly if looseness, abnormal noise or insufficient lubrication is found.

6. Live maintenance is prohibited: During the operation of the equipment, it is not appropriate to disassemble, refuel, clean or make internal adjustments. Shut down the machine and cut off the power supply before maintenance.

2. Correct startup sequence

The mobile dust collector should follow the principle of “turn on the dust removal equipment first, then the dust production equipment” so that the dust collection system has formed a stable negative pressure before the dust production process is started.

1. Check whether the power supply, fan, filter components, dust bucket and pipelines are normal.

2. Confirm that the vacuum hood is aligned with the location where dust is generated.

3. Start the mobile dust collector and observe the fan sound, vibration and suction.

4. After confirming that the equipment is running stably, start the dust-generating equipment or production process.

5. In the early stage of operation, check whether the interface is leaking and whether the dust cover can effectively capture dust.

3. Correct shutdown sequence

When shutting down, the dust-producing equipment should be stopped first, and then the mobile dust collector should continue to run for a period of time to suck the residual dust near the dust suction pipe and hood into the equipment.

1. Stop dust-producing equipment or close dust-producing points.

2. Keep the dust collector running to remove residual dust in the pipeline.

3. Turn off the dust removal fan and control power supply.

4. Clean the dust bucket and check the dust accumulation on the filter components.

5. When shutting down for a long time, the equipment should be cleaned and kept dry inside.

IV. Main factors affecting dust removal effect

1. Filter material selection: Filter material should be selected based on dust particle size, temperature, humidity, corrosiveness and viscosity. Ordinary mobile dust collectors commonly use needle felt, film-coated filter materials or filter cartridge materials, and it is not appropriate to directly apply the material selection standards for high-temperature industrial dust collectors.

2. Processing air volume: The actual air volume should match the equipment design capacity. If the air volume is too small, the collection effect will be reduced, while if the air volume is too large, the filter resistance will be increased and the life of the filter material will be shortened.

3. Filtration wind speed: If the filtration wind speed is too high, it will easily cause dust compaction and filter material clogging. If it is too low, it may lead to an increase in equipment volume and energy consumption. It should be reasonably determined based on the nature of the dust.

4. Dust hood location: The dust hood should be as close to the dust generation point as possible and match the direction of dust diffusion to reduce unorganized escape.

5. System air leakage: Air leakage from access doors, pipes and connections will reduce the suction of the mask and affect the dust collection effect.

6. Filtration resistance: When there is too much dust in the filter bag or filter cartridge, the equipment resistance will increase and the air volume will decrease. Therefore, the dust should be cleaned in time according to the pressure difference or usage time.

7. Dust humidity and viscosity: Moist, oily or sticky dust easily adheres to the surface of the filter material, causing clogging and difficulty in cleaning.

8. Equipment sealing and structure: Box sealing, airflow organization and internal diversion structure will affect whether dust-containing gas can pass through the filter area evenly.

9. Dust cleaning methods: mechanical vibration, pulse injection or manual dust cleaning should match the properties of the filter material and dust. Insufficient or excessive dust cleaning will affect the operation.

10. Maintenance status: The maintenance status of fans, filter materials, vacuum pipes and dust collection devices will directly affect the long-term stability of the equipment.

5. Temperature control requirements

The temperature of the gas entering the mobile dust collector must not exceed the range allowed by the filter material, fan and equipment structure. The temperature resistance levels of different filter materials vary greatly and should not be uniformly controlled at 200°C.

For high-temperature smoke and dust, cooling, spark separation or other pretreatment measures should be taken at the front end of the equipment to confirm that the temperature meets the requirements before entering the dust collector. Ordinary mobile dust collectors are usually not suitable for directly handling high-temperature flue gas.

6. Configuration of fan and dust collection system

Mobile dust collectors usually use negative pressure dust collection, and the fan sucks the dust-containing gas into the filter device. The fan air volume and total pressure should be selected based on the dust hood, pipe resistance, filter resistance and actual working conditions.

The bigger the fan, the better. Excessive air volume may lead to increased noise, energy consumption and filter load, while insufficient air volume may result in insufficient suction of the mask. When selecting, ensure that the system air volume and filter area are reasonably matched.

7. Pre-separation and secondary dust removal

When the dust contains a lot of large particles or high-density particles, a settling chamber, cyclone separator or other pre-separation structure can be set up in front of the filtering device to remove part of the large particles first.

Pre-separation can reduce the load and wear of the filter material, but whether it needs to be configured should be comprehensively judged based on the dust properties, concentration and equipment space. Not all mobile dust collectors must be equipped with secondary dust removal.

8. Suggestions for improving dust removal effect

1. Reasonably design the dust hood according to the size of the dust generation point and the direction of dust diffusion.

2. Keep pipelines clear and reduce unnecessary elbows and excessively long pipelines.

3. Clean the dust regularly and clean the dust bucket promptly.

4. Replace the filter material promptly when it is found that it is damaged, aged or unable to restore air permeability.

5. Select the appropriate filter material and cleaning method according to the nature of the dust.

6. Regularly inspect fans, motors, seals and electrical systems.

For flammable and explosive dust, high-temperature sparks, toxic dust or high-concentration dust, a special dust removal system that meets the corresponding safety requirements should be selected. Ordinary mobile dust collectors should not be used directly without risk assessment.