The solid-liquid separation centrifuge mainly uses the principle of centrifugal sedimentation to make solid-liquid separation. Since there is no filter screen, it will not cause clogging, and the belt machine uses the filter belt to separate the solid-liquid. In order to prevent the filter belt from being clogged, high-pressure water is required to be continuously washed. The centrifuge is suitable for the concentration and dewatering of various types of sludge, and the belt machine is also applicable to various types of sludge. However, it is necessary to apply a large amount of oil to the oily, viscous and residual activated sludge and to dehydrate it.
In the process of dewatering of solid-liquid separation centrifuge, when the feed concentration changes, the slip and torque of the drum and the screw will be automatically tracked and adjusted, so there is no special operation, and the filter concentration changes during the dehydration process. At the time, the belt speed, the tension of the belt, the dosing amount, and the flushing water pressure need to be adjusted, and the operation requirements are high.
In the solid-liquid separation centrifuge, the fine sludge can also be separated from the water, so the dosage of the flocculant is less. Generally, the dosage of the mixed sludge dewatering is: 1.5kg/, and the sludge recovery rate is 95. Above 100%, the moisture content of the mud cake after dehydration is about 60%-85%, and the filter belt cannot be woven too densely. In order to prevent the fine sludge from leaking, it is necessary to add more flocculant to make the stain. The mud forms a large floc. Generally, the dosage of the mixed sludge is more than 3kg/L, the sludge recovery rate is over 90%, and the moisture content of the mud cake after dehydration is about 80%.