The horizontal centrifuge equipment is the important solid-liquid separator in the fish oil production line, which also named fish oil separator, three-phase centrifuge, centrifugal filtration and so on. This fish oil separator can mainly separate the fishmeal, water and fish oil from the waster water of the cooked fish squeezing machine. The three-phase centrifuge uses the difference in specific gravity between the light phase liquid, the heavy phase liquid, and the solid phase. Under the centrifugal force generated by the high-speed rotation of the centrifuge, the solid matter such as fish meal settles on the inner wall of the drum to form a solid ring layer. Light phase materials such as sewage and fish oil flow out from different outlets of the machine.
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This industrial centrifuge can realize oil-water separation, water-slag separation and simultaneous separation of oil, water, and slag. The horizontal centrifuge is mainly used for the extraction and separation of animal protein, can refine animal fats in meat processing, and is used for concentrated separation of fish oil in aquatic processing.
The three-phase horizontal centrifuge relies on the density difference of the material to be treated and relies on the centrifugal force of the machine to realize the sedimentation stratification. The lighter the liquid phase is closer to the axis of the rotary shaft, the heavier the liquid phase is closer to the inner wall of the drum, the heaviest solid-phase settles on the inner wall of the drum, and the light and heavy liquid phases are discharged from the respective channels designed by the machine itself, and the solid phase is discharged by the screw feeder.
The main components of the centrifuge machine include drum, spiral, main motor, belt drive system, mechanical differential, base, casing, feed pipe, bearing, shock absorber, vibration switch, on-site emergency switch, the comprehensive dehydration system control cabinet and so on.
The fish oil separator can continuously separate fish meal and fish oil with different specific gravity. Solid fishmeal is discharged by gravity, and fish oil and water are discharged by gravity through the overflow. In order to ensure the service life of the centrifuge, all parts in contact with the material are made of high-quality stainless steel. In addition, the machine uses the most advanced welding process and is solution treated to ensure the corrosion resistance of the material.
The ratio of the sedimentation velocity of the solid phase particles in the suspension to the sedimentation velocity under the action of gravity is called the separation factor. The separation factor chosen is different under different materials and operating conditions.
If the material solid particle size is small, the solid-liquid density difference is small, the liquid viscosity is high (low temperature), the separation factor is selected to be higher; the material solid phase particle size is large, the solid-liquid density difference is large, and the liquid viscosity is small (high temperature) ), the separation factor is chosen to be lower; if the flocculant is added during the separation process, the separation factor can be lower.
In order to stabilize the differential speed between the screw and the drum, the horizontal centrifuge is equipped with a differential. When the rotation speed of the drum is constant, changing the rotation speed of the input shaft of the differential can adjust the differential speed between the screw and the drum, thereby adjusting the separation effect of the horizontal centrifuge.
Under other conditions, when the differential rotation speed is low, the screw pushing speed is lowered, the residence time of the solid phase in the dewatering zone is increased, and a solid phase having a lower moisture content can be obtained. As the screw push speed is reduced, the push can be reduced and the liquid phase clarity can be reduced, and vice versa.
The interval between the liquid level in the drum of the fish oil separator and the drum wall is the liquid level “height”, which is called the depth of the drum pool. The inner diameter of the overflow plate is different, the depth of the liquid pool is also different, and the lengths of the dewatering zone and the settling zone in the drum are also different, thereby changing the sedimentation and dewatering capacity of the centrifuge.
Under other conditions, using a larger inner diameter overflow plate will reduce the depth of the liquid pool, shorten the length of the settling zone, and reduce the sedimentation capacity of the centrifuge. However, it will increase the length of the dewatering zone, increase the dewatering time of the fishmeal, and improve the dewatering performance of the decanter centrifuge, and vice versa.