The filter cartridge dust collector, with its advantages of efficient filtration, compact structure, and stable operation, is widely used in various industrial fields such as mechanical processing, welding and cutting, furniture manufacturing, and building materials. It is a key equipment to ensure that the production environment meets standards and improve operational safety. The long-term stable operation of equipment cannot be separated from standardized daily maintenance, among which daily inspection, as the core link of preventive maintenance, can timely detect potential hazards, avoid the expansion of faults, and extend the service life of equipment. This article provides a detailed overview of the core items for daily inspection of filter cartridge dust collectors, providing clear inspection guidelines for operation and maintenance personnel.

1、 Basic operating parameter check

Basic operating parameters are intuitive indicators that reflect the operating status of equipment, and should be checked first to ensure that all parameters are within the normal range.

1. Import and export pressure difference: The value is read by the pressure difference gauge equipped with the equipment. During normal operation, the pressure difference between the inlet and outlet of the filter cartridge dust collector is usually between 800-1200Pa. If the pressure difference suddenly increases, it may be due to issues such as clogged filter cartridges or incomplete dust removal; If the pressure difference is too low or drops sharply, be alert to situations such as filter cartridge damage and seal leakage. During inspection, it is necessary to confirm that the differential pressure gauge displays accurately, without any lagging or malfunction, and to regularly calibrate the accuracy of the differential pressure gauge.
2. Air volume and wind speed: Check whether the actual air volume meets the equipment design requirements through the air volume monitoring device, or observe the dust diffusion situation in the production workshop. At the same time, pay attention to the operation status of the fan and determine whether the wind speed is stable. If the air volume is abnormal, further investigation is needed to address issues such as air duct blockage and fan failure.
3. Operating temperature: Use temperature measuring instruments to detect the inlet and outlet gas temperature of the equipment, as well as the surface temperature of the casing, to ensure that the temperature is within the tolerance range of the filter cartridge material. If the temperature is too high, it may cause the filter cartridge to burn out or deform; If the temperature is too low, it may cause water vapor in the gas to condense, causing the filter cartridge to become damp and blocked.

2、 Core filtration component - filter cartridge inspection

The filter cartridge is the core filtering element of the filter cartridge dust collector, and its state directly determines the dust removal efficiency, which needs to be carefully inspected.

1. Appearance status: Open the equipment maintenance door and visually inspect the surface of the filter cartridge for any damage, tearing, deformation, etc. If obvious holes are found on the surface of the filter cartridge or cracks are found at the edge seal, it is necessary to immediately replace it with a filter cartridge of the same model and material to avoid dust leakage; If the filter cartridge is deformed, it is necessary to investigate whether it is caused by high temperature or improper installation.
2. Dust accumulation situation: Observe the dust adhesion state on the surface of the filter cartridge. During normal operation, a uniform dust layer should adhere to the surface of the filter cartridge and be effectively peeled off by the dust cleaning system. If the dust layer is too thick and compacted to be removed by cleaning, it indicates that the filter cartridge is clogged and needs to be cleaned or replaced in a timely manner; If there is almost no dust adhering to the surface of the filter cartridge, it may be due to damage to the filter cartridge or uneven airflow distribution.
3. Sealing performance: Check the fit between the filter cartridge, mounting seat, and sealing gasket to ensure no looseness or gaps. If the sealing gasket ages, deforms, or is damaged, it can cause a short circuit in the dusty airflow, affecting the dust removal efficiency. It is necessary to replace the sealing gasket in a timely manner.

3、 Dust cleaning system inspection

The normal operation of the dust cleaning system is the key to ensuring the filtration performance of the filter cartridge, and it is necessary to check whether the working status of each component is stable.

1. Pulse valve inspection: Listen to the sound of the pulse valve when it is working. Under normal circumstances, the pulse valve should emit a clear and regular "pu pu" blowing sound. If the pulse valve does not operate, operates irregularly, or leaks air, it may be caused by damage to the solenoid valve, stuck valve core, or insufficient compressed air pressure. You can use a multimeter to check the on/off status of the solenoid valve coil, disassemble the pulse valve to clean impurities in the valve core, or check the pressure of the compressed air pipeline.
2. Spray pipe and nozzle: Check whether the spray pipe is blocked, deformed, misaligned, etc., clean the dust and debris inside the spray pipe, and ensure that the spray pipe is installed firmly; Confirm that the nozzle is aligned with the opening of the filter cartridge. If the nozzle is misaligned, it will cause uneven dust removal and the nozzle position needs to be adjusted.
3. Compressed air system: Check whether the pressure in the compressed air pipeline is stable at 0.4-0.6MPa and whether there is any air leakage in the pipeline; Check the working status of the oil-water separator and dryer, promptly discharge the moisture and oil stains inside the oil-water separator, ensure that the compressed air is dry and clean, and avoid moisture and oil stains from adhering to the surface of the filter cartridge and causing blockage.
4. Dust cleaning control parameters: Check whether the control parameters such as dust cleaning interval time and blowing time meet the current working conditions requirements. If the cleaning interval is too long and the spraying time is too short, it will lead to incomplete cleaning; If the interval is too short or the blowing time is too long, it will cause compressed air waste and may also damage the filter cartridge. Parameters need to be adjusted according to dust concentration and operating conditions.

4、 Inspection of ash hopper and ash unloading device

The ash hopper and ash unloading device are responsible for collecting and discharging filtered dust, ensuring that they are unobstructed and unobstructed.

1. Ash accumulation in the ash hopper: Check the ash accumulation height through the ash hopper observation window or level gauge. If the ash accumulation is too high, it will cause the equipment resistance to increase, and even block the bottom of the filter cartridge, affecting the airflow. It is necessary to ensure the normal operation of the ash unloading device and timely discharge the accumulated ash.
2. Working status of ash unloading device: Check the operating status of ash unloading equipment such as screw conveyors and star shaped unloaders, listen to whether the equipment's operating noise is normal, and check for dust leaks. If the ash unloading device experiences jamming, abnormal noise, shutdown, etc., it is necessary to immediately stop the machine for inspection, clean up the stuck debris inside the equipment, and repair the faulty components.
3. Ash hopper heating and anti blocking device: Under low temperature and high humidity conditions, it is necessary to check whether the ash hopper heating device is working properly and whether the temperature displayed by the temperature controller meets the requirements, in order to avoid the dust in the ash hopper from getting damp, clumping, and blocking; Check the operation status of the ash hopper vibration anti blocking device (if any) to ensure that it can effectively assist in the fall of accumulated ash.

5、 Fan and duct system inspection

The fan is the power source of the filter cartridge dust collector, and the air duct is responsible for conveying the airflow. The stable operation of both directly affects the overall performance of the equipment.

1. Fan operating status: Check if there is severe vibration or abnormal noise during fan operation, touch the fan casing with your hand to feel if the temperature is too high. If there is vibration or abnormal noise, it may be due to unbalanced dust accumulation on the fan impeller, bearing damage, motor failure, etc. It is necessary to stop the machine for disassembly and inspection, clean the impeller dust, replace the bearing, or repair the motor.
2. Fan sealing and lubrication: Check whether the fan shaft seal is tight and whether there is dust leakage; Check the lubrication condition of the bearings, check whether the lubricating oil level is sufficient and the oil quality is good. If the oil level is insufficient, it should be replenished in a timely manner. If the oil quality deteriorates, the lubricating oil should be replaced.
3. Duct system: Check whether there is any damage or air leakage in the inlet and outlet ducts, whether the sealing gasket at the flange connection of the duct is aging or falling off, and promptly repair the damaged ducts and replace the sealing gasket; Clean up the accumulated dust and debris inside the air duct to ensure smooth flow and reduce airflow resistance.

6、 Electrical and control system inspection

The electrical and control system is the "brain" of equipment operation, and it is necessary to ensure that its circuits are unobstructed and components are intact.

1. Wiring and wiring terminals: Check whether the power and control wires of the equipment are damaged, aged, or exposed, and whether the wiring terminals are loose or oxidized. If the circuit is found to be damaged, it should be replaced in a timely manner. Loose terminals should be tightened, and oxidized terminals should be cleaned or replaced to avoid poor contact and equipment failure.
2. Control component status: Check the working status of PLC controller, touch screen, relay, contactor and other control components, check whether the indicator lights are displayed normally, and whether the parameter settings are accurate. If the control component malfunctions, it needs to be repaired or replaced in a timely manner.
3. Safety protection device: Check whether the overload protection, overheating protection, emergency stop button and other safety devices of the equipment are effective. Test whether the emergency stop button can quickly cut off the power supply of the equipment, and whether the overload and overheating protection devices can trigger alarms and shut down in case of abnormalities, ensuring the safety of operators.

7、 Daily inspection summary and precautions

The daily inspection of the filter cartridge dust collector should follow the principle of "comprehensive, meticulous, and timely". It is recommended to develop a daily inspection checklist, clarify the inspection items, responsible persons, and inspection time, record the problems found during the inspection, and rectify them in a timely manner. Meanwhile, the following points should be noted:

1. Before inspection, safety precautions should be taken, such as wearing dust masks, protective gloves, and other protective equipment. When stopping the machine for inspection, the power supply of the equipment should be cut off, and a "Do Not Close" warning sign should be hung to avoid accidental start-up.
2. For vulnerable components, it is necessary to reserve spare parts of the same model in advance for quick replacement and to reduce downtime.
3. Daily inspections should be adjusted according to the operating conditions of the equipment, such as increasing the inspection frequency of filter cartridges and ash hoppers in conditions with high dust concentration and humidity; Under high temperature conditions, it is necessary to focus on monitoring temperature parameters and filter cartridge status.

Standardized daily inspections are an important guarantee for the stable operation of filter cartridges and dust collectors. Through a comprehensive investigation of basic parameters, core components, and auxiliary systems, potential problems can be discovered and solved in a timely manner, avoiding small hidden dangers from evolving into major failures. Operations personnel need to strictly implement daily inspection procedures, continuously accumulate operational experience, optimize inspection focus based on actual working conditions, and ensure long-term efficient and stable operation of equipment.