Sewage mixer may encounter a variety of common faults during use. The following are some common faults and their solutions for reference:

First, common faults and solutions

Submersible mixer vibrates or wobbles

Reasons: Inundation depth is not enough, forming a vortex, inhaled air; The pool capacity is small, the mixing is too violent, resulting in unbalanced impeller; Guide rod support installation foundation loose; Multiple devices interfere with each other; The impeller is damaged.

Solution: increase the submerged depth; Select the equipment suitable for the pool volume; Re-reinforce the installation foundation; Increase equipment spacing or set anti-interference board; Replace the impeller.

Excessive load current

Reason: strong viscosity or high concentration of liquid; Rotation direction is wrong; Impeller obstruction; The guide hood interferes with the impeller.

Solution: Use high-power equipment; Change the rotation direction; Remove debris on the impeller; Adjust the clearance between impeller and fairing.

Abnormal noise

Reason: the guide hood and impeller interference; The bearing is damaged.

Solution: Adjust the gap between the impeller and the fairing; Replace the bearings.

Stator overtemperature alarm

Cause: the load current is too large; Electronic overtemperature alarm damage; The motor is damaged.

Solution: Replace the stator overtemperature alarm device; Check motor performance and replace motor if necessary.

Oil chamber leak alarm

Solution: Change the oil, check again after 3 weeks, if the current situation continues, check the mechanical seal.

Motor does not respond or does not start

Cause: The power line contact is poor; The motor is damp or water; There is debris blocked inside the motor; The fuse is blown.

Solution: Check the power line and reconnect; Dry the motor and check the insulation performance; Clean up the motor internal debris; Replace the fuse.

Abnormal noise or excessive temperature of the reducer

Reason: insufficient lubricating oil; Gear or bearing wear.

Solution: add or replace lubricating oil; Inspect and replace worn gears or bearings.

Stirrer speed is not stable or can not meet the requirements

Cause: The power supply voltage is unstable; Capacitor failure; Gear box wear; The transmission device is damaged or loose.

Solution: Adjust the power supply voltage to a stable state; Replace capacitors; Inspect and replace worn gearbox components; Tighten the transmission.

Second, maintenance suggestions

Regular cleaning: Regularly clean the blade of the mixer and the surrounding area to ensure that no solid matter is attached to the mixer to improve mixing efficiency and prevent misoperation.

Check bearings and seals: Check bearings and seals of agitator regularly to ensure normal operation. Lubricate if necessary to reduce friction and extend bearing life.

Calibrate the motor: Check the operating status of the motor, and adjust the position and alignment of the motor as needed to ensure that the motor is well connected to the mixer to avoid unnecessary vibration and damage.

Monitor electrical systems: Regularly inspect electrical systems, including cables, wiring and control panels, to ensure safety and reliability.

Regular lubrication: For parts that require lubrication, such as bearings, ensure regular lubrication as recommended by the manufacturer.

Replace worn parts: Check the key parts of the mixer regularly, such as blades, bearings and seals, and replace them in time if they are worn or damaged.

Comply with the operating procedures: the operator should strictly abide by the operating procedures and safety specifications of the sewage mixer to ensure the safety and effectiveness of the operation process.

By following the above troubleshooting methods and maintenance recommendations, the failure of the sewage mixer can be effectively reduced, the service life of the equipment can be extended, and the normal operation of the sewage treatment system can be ensured.

Nanjing LanJiang Water Treatment Equipment Co.,Ltd manufactures equipment for wastewater treatment. We were established in 2001. Since then, we designed and produced submersible mixers, top entry mixers, aerators and other wastewater treatment equipment.