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Decanter centrifuge | Sludge dehydrator | Centrifugal dehydrator | mud dehydrator | Jinhua horizontal screw centrifuge | Complete set of sludge dewatering equipment

Causessolutions of failure of sludge dehydrator

2021-05-28 11:22:03


Causes and solutions of failure of sludge dehydrator


1. The electric control cabinet cannot be powered on and the motor cannot be started. The reason is that the overload or emergency stop power switch is locked, or the protection device is started. The solution is to check whether the protection device is disconnected, whether the transmission load is overloaded, and whether the circuit system. Whether it is damaged.


2. The barometer cannot be adjusted because the pipeline or pneumatic components of the sludge dehydrator leak, or the air compressor cannot start automatically, or the air filter is blocked or the pressure regulating valve is damaged. Solution: check whether the air pipe is damaged or discounted, check the air compressor and pneumatic components, and repair or replace them in time.


3. The main engine stopped automatically because the filter screen deviated and exceeded the limit, and the protection was started. The solution is to loosen the mesh belt, manually move the mesh belt to reset the middle, remove the protection, and then locate the travel switch after the operation is normal.


4. If the filter screen deviates beyond the limit or causes wrinkling, the sludge dehydrator is the failure of the deviation adjustment device. The solution is to check the air pressure, check whether the deviation adjustment valve is damaged, check whether the filter screen induction roller is separated from the mesh edge, check whether the connecting rod is sensitive, check whether the cylinder is damaged, check whether there is air leakage, and check whether the deviation adjustment roller rotates flexibly


5. The roller shaft cannot rotate because the bearing is damaged. The solution is to replace the bearing.


6. The water content of the filter cake is high because the flocculation is insufficient, or the tension of the filter screen is insufficient, or the filter press speed is fast, or the filter screen is not cleaned thoroughly. The solution of sludge dehydrator is to adjust the mixing ratio of sludge and liquid medicine, adjust the tension of filter screen and the speed of main drive, and check the cleaning device.


7. The reason for sludge leakage on both sides of the extrusion section is that the feed volume is too large, or the flocculation effect is poor, or the water permeability of the filter screen is not timely. The solution is to adjust the switch of the sludge valve, adjust the flocculation effect and the concentration of the flocculant, and check whether the cleaning device of the sludge dehydrator works normally.


8. There is too much suspended solids in the filter press or cleaning water because the permeable clearance hole of the filter screen is too large or the flocculation is insufficient. The solution is to replace the filter screen and check whether the flocculant is properly selected and whether the dissolution concentration is too high or low.


9. The filter screen is not cleaned cleanly because the nozzle is blocked, or the water pressure is not enough, or the flocculation effect is poor. The solution is to dredge the nozzle, replace the cleaning water pump and check the flocculation effect.


10. The flocculation effect of sludge is poor, the mixing ratio of sludge and flocculation liquid is incorrect, the concentration of flocculation liquid is low, and the sludge concentration is too high. Check the concentration of flocculation liquid, adjust the dosage of sludge dehydrator, and replace the type and quality of flocculant.





The treatment capacity of the sludge dehydrator shall be controlled within an appropriate range and adjusted in combination with the flow of sludge, the flow of flocculant and the difference degree, so as to avoid the frequent fluctuation of the system and affect the treatment effect caused by the sudden increase of load, and realize relatively large equipment treatment efficiency at the same time;


The dehydration effect of the dehydrator is often detected. If the separation liquid is turbid and the solid return rate decreases, the causes shall be analyzed in time and targeted measures shall be taken to solve it.


Often observe the dewatering effect of sludge. If the solid content of sludge cake decreases, analyze the situation and take corresponding measures to solve it.


Regularly observe the operation status of sludge dewatering unit and take corrective measures against abnormal phenomena to ensure normal operation.


Sufficient washing time of the dehydrator shall be ensured every day. When the dehydrator is shut down, the interior and whole body of the machine shall be washed clean to ensure cleanliness and there shall be no foul smell. Otherwise, it is very difficult to wash after the mud is dry.


According to the requirements of the dehydrator, observation and inspection and maintenance of the machine shall be done frequently.




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