Horizontal centrifuge Is a common Solid liquid separation equipment It is mainly composed of drum, screw, differential system, liquid level baffle, drive system and control system. It uses the density difference between solid and liquid phases to accelerate the settling speed of solid particles under the action of centrifugal force Solid-liquid separation 。 The specific separation process is that the sludge and flocculant solution are sent to the mixing chamber in the drum through the inlet pipe for mixed flocculation; Due to the high-speed rotation and friction resistance of the rotor (spiral and drum), the sludge is accelerated inside the rotor and forms a cylindrical liquid ring layer; Under the action of centrifugal force, solid particles with higher density settle to the inner wall of the drum; Then, the relative velocity difference between the spiral and the drum is used to push the solid phase to the cone end of the drum. After the liquid level is pushed out, the sludge can be dehydrated and dried, and then pushed to the slag outlet for discharge; The supernatant is discharged from the big end of the drum to realize solid-liquid separation.

influence Centrifuge The factors of effect mainly include non adjustable mechanical factors and adjustable operational factors. Non adjustable mechanical factors include drum diameter and effective length, drum half cone angle, pitch and screw type. Among them, the larger the drum diameter and effective length are, the greater the processing capacity is, and the better the separation effect is; The larger the semi cone angle of the drum is, the greater the sludge is squeezed by centrifugal force, the greater the torque of the screw thrust, the greater the wear of the blades, and even the sediment backflow phenomenon, resulting in the inability of the screw feeder to discharge slag; The larger the pitch, the greater the chance of material blocking between the spiral blades; The spiral type can be divided into counter flow type and forward flow type. The counter flow type is suitable for difficult to separate materials with small solid-liquid density difference, poor solid sedimentation performance, and low solid content. The forward flow type is suitable for easy to separate materials with large solid-liquid density difference, good solid sedimentation performance, and high solid content.

The adjustable operating factors mainly include feed concentration, flocculant type and dosage, rotation speed, spiral rotation speed, etc. If the feed concentration is too high or too low, the separation effect of the centrifuge will be affected; Selection of appropriate flocculant type and dosage can improve the flocculation effect of sludge, thus improving the separation effect of centrifuge; The separation effect of the centrifuge can be optimized by properly adjusting the rotating speed and the rotating speed of the screw.

Adjustable operating factors:

1. Feed concentration

The feed concentration is one of the important factors affecting the centrifuge effect. Proper feed concentration can improve the separation effect of centrifuge. High feed concentration may lead to equipment blockage and affect separation effect; Too low feed concentration may reduce treatment efficiency and affect production capacity. Therefore, in actual operation, it is necessary to adjust the feed concentration according to the equipment capacity and production demand.

2. Type and dosage of flocculant

In the process of sludge dewatering, adding flocculant can improve the flocculation effect of sludge, thus improving the separation effect of centrifuge. It is the key to select the appropriate flocculant type and dosage. Different flocculants have different flocculation effects and application conditions on sludge, which need to be selected according to specific conditions.

3. Speed

The rotating speed of centrifuge directly affects the effect of solid-liquid separation. The separation effect of centrifuge can be optimized by adjusting the rotating speed properly. Generally speaking, the higher the rotating speed, the better the separation effect. However, in actual operation, the speed needs to be adjusted according to equipment performance and production demand.

4. Screw speed

The rotating speed of the screw is also one of the factors affecting the effect of the centrifuge. The separation effect of the centrifuge can be optimized by properly adjusting the rotating speed of the screw. Generally, there is a certain relationship between the screw speed and the centrifuge speed, which needs to be adjusted according to the specific situation.

In a word, the factors affecting the centrifuge effect include non adjustable mechanical factors and adjustable operating factors. In actual operation, these factors need to be comprehensively considered to optimize the equipment performance and improve the separation effect. At the same time, the centrifuge needs to be maintained regularly to ensure long-term stable operation of the equipment.

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