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The operation cycle of the filtration centrifuge has two major stages, namely: * acceleration phase, feeding phase; second acceleration phase, washing phase drying phase, deceleration phase, discharge phase. The acceleration phase refers to the beginning of the operating cycle, which is the speed required to accelerate the drum to the feed, which is selected by the manufacturer.
In the feeding stage, when selecting the feeding speed, the balance between the required power and the available power is mainly considered, and then the uniform distribution of the cake should be considered to prevent the occurrence of unbalanced feeding, so that the filter cake is evenly distributed. After the feed is stopped, the drum can be accelerated to the high operating speed of Zui to filter the mother liquor as quickly as possible. This acceleration time is selected but controlled by the characteristics of the motor.
In order to obtain a pure solid product, the filter cake is generally washed. Since the washing is carried out immediately after the filtration, for the fixed cake layer, the route of the washing liquid through the filter cake is substantially formed along the original filtration. The pore structure flows out. Centrifugal drying is used as an operation stage, the purpose of which is to minimize the amount of liquid in the filter cake after centrifugation and washing, or the amount of residual liquid. The slope of the operating line during the deceleration phase is related to the type and characteristics of the drive system and to the rate at which the brake system absorbs energy. The timing of the unloading phase is influenced by a number of factors, which are determined by the torque available to rotate the drum at the discharge speed, the characteristics of the unloaded filter cake, and the design features of the scraper or other device for unloading.
The suspension of the filter centrifuge enters the spiral cavity from the feeding tube, and enters the rotating drum through the nozzle opening near the bottom of the cone end by the spiral small head. The liquid phase in the slurry passes through the rotating wall under the action of the centrifugal force field. The screen is separated, and the solid particles are trapped in the drum. At the same time, the solid particles in the drum are larger from the small end of the drum to the drum under the differential force between the centrifugal force and the screw and the drum. End movement, during this movement, due to the increase of the diameter of the rotation, the centrifugal force is rapidly increased, and the solid phase reaches the low-humidity solid phase from the high moisture content solid phase at the initial entry to the discharge drum, thereby achieving solidification. The liquid phase is automatically and continuously separated.
The processes of feeding, dehydration, washing and unloading in the separation process are continuously completed, and the production efficiency and automation are high, which is an advanced separation device. However, due to its separation principle and structural characteristics, it is also highly targeted to materials. Material selection and corresponding tests should be carried out during the selection to determine its applicability and separation performance.
Filtration centrifuges are widely used in chemical, food, salt, mining, pharmaceutical and other industries. So what is the performance of the filter centrifuge?