During the sludge treatment process, the horizontal screw centrifuge mainly reduces the water content of the sludge through efficient solid-liquid separation, thereby indirectly reducing the total volume and weight of the sludge, rather than directly reducing the “amount of sludge produced” (because the amount of sludge produced is usually determined by the production process and the treatment object, and the centrifuge cannot control it). The following are several ways to reduce the volume and weight of sludge: The horizontal screw centrifuge is a powerful tool in sludge treatment. By utilizing solid-liquid separation, it effectively decreases the water content, hence indirectly lowering the total volume and weight of the sludge. While the amount of sludge produced is out of the centrifuge’s control, it plays a significant role in reducing the volume and weight of sludge.
Optimize centrifuge operating parameters
Speed adjustment: Properly increasing the speed of the centrifuge can increase the centrifugal force, separate the water in the sludge more effectively, and reduce the water content of the sludge.
Differential speed control: The differential speed (i.e. the relative speed difference between the screw conveyor and the drum) directly affects the dehydration effect of the sludge and the solid content of the mud cake. Proper adjustment of the differential speed can optimize the dehydration effect, but care should be taken to avoid the “re-mixing” phenomenon caused by excessive differential speed.
Liquid ring layer thickness adjustment: The liquid ring layer thickness is controlled by adjusting the height of the liquid level baffle, which affects the residence time of the sludge in the centrifuge and the dehydration effect. When the liquid ring layer thickness is moderate, it can not only ensure the dehydration effect, but also avoid the reduction of the sludge cake degree caused by too short drying area.
Use of flocculants
Choose appropriate flocculants: Choose appropriate flocculants (such as polyacrylamide PAM) according to the properties of the sludge. Through flocculation, the sludge particles are aggregated and enlarged, which is beneficial to the solid-liquid separation during the centrifugal dehydration process.
Optimize the dosage: Too much or too little flocculant will affect the dehydration effect. Therefore, it is necessary to determine the optimal flocculant dosage based on the specific conditions of the sludge and the performance parameters of the centrifuge.
Equipment maintenance and care
Regular cleaning: Keeping the centrifuge clean, especially the key components such as the drum and screw conveyor, can prevent sludge clogging and increased wear, and ensure the normal operation and dehydration effect of the centrifuge.
Inspect and replace wearing parts: Regularly check the wearing parts of the centrifuge (such as bearings, seals, etc.), and replace severely worn parts in time to avoid a decrease in dehydration effect due to equipment failure.
In summary, by optimizing the operating parameters of the horizontal screw centrifuge, rationally using flocculants, strengthening equipment maintenance and taking other auxiliary measures, the moisture content and volume weight of the sludge can be effectively reduced, achieving the goals of energy conservation, emission reduction and resource utilization. By following these simple steps, you can effectively reduce the moisture content and volume weight of your sludge. With proper optimization of operating parameters, the use of flocculants, and regular equipment maintenance, you can achieve energy conservation, emission reduction, and resource utilization.