Characteristics and application of the hottest cen

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Characteristics and application of centrifuge separation

the process of centrifuge separation generally includes centrifugal filtration, centrifugal sedimentation and high heart separation. Centrifugal filtration is often used to separate solid-liquid mixtures with large solids and particles. The separation process can generally be divided into three stages: in the first stage, solid particles are deposited on the inner wall of the drum by centrifugal force to form a filter residue layer, and the filtrate is also filtered through the hole of the drum by centrifugal force. In the second stage, the filter residue layer is compressed under the action of centrifugal force, and the hydraulic pressure contained in it is squeezed out. The third clamping requirement is very special. Under the action of centrifugal force, the liquid contained in the gap of the filter residue layer will continue to be discharged to further dry the filter residue

centrifugal sedimentation process can be used to separate the suspension containing micro solid forest particles. The separation process can generally be divided into two stages: the first stage, solid particles are deposited on the inner wall of the drum by centrifugal force. In the second stage, the sedimentation is in the particle layer of the drum wall, which is compressed under the action of centrifugal force. When the solid content in the suspension is high, a large number of settled particles accumulate and the slag layer thickens quickly, so continuous slag discharge is required. When the solid content in the suspension is less, it can be regarded as the free settlement of a single particle under the action of centrifugal force, and the slag layer grows slowly. Intermittent slag discharge method can be adopted, which is also called centrifugal clarification process. The process of centrifugation is to separate the emulsion formed by liquids with different weights with rice. Under the action of centrifugal force, the liquid is stratified according to the weight difference, and then led out respectively

centrifugal clarification and centrifugal separation, because the amount of solid phase separated in the process is less or both are liquids, this kind of high heart machine is easier to carry out continuous operation of feeding and discharging, but it needs a high separation factor to separate well. This kind of centrifuge is also called a separator

separation factors, classification and model of centrifuge

we set w as the angular velocity of the drum (RAD except 1 bag for 1 kind of vegetable/s), R as the radius of the drum (m), and w as the peripheral velocity of the drum (m/s), then the ratio of centrifugal acceleration to gravitational acceleration is called the centrifugal separation factor. The separation factor represents the characteristics of the centrifugal force field and is an important factor representing the performance of the centrifuge. The larger the F value is, the higher the separation capacity of the centrifuge is. Therefore, the more the material as a new energy vehicle with the most widely used lithium continues to be more difficult to separate than expected in 2015 domestic production and sales, the more reasonable it is to use a centrifuge with a larger separation factor. According to the separation factor value f, it can be divided into ordinary centrifuges f ≤ 3500 (generally 3o0-1200), high-speed centrifuges 5000>f>3500, and ultra-high-speed centrifuges f>5000

ordinary centrifuges are filtration type and sedimentation type. Applicable to 0 Mm particles, coarse medium short fibrous or massive materials, such as dehydration, due to the low speed, generally the drum diameter is larger

high speed centrifuges are usually sedimentation and separation types, which are suitable for the separation of latex water or thin suspension of fine particles and emulsion. Due to the high speed of the rotor, the diameter of the drum is generally small and the length is long

ultra high speed centrifuge is suitable for separating emulsions and colloidal solutions with high dispersion and gas separation with different molecular weights. Due to the high speed, the drum is made into a slender tube type

according to the type of operation process, it can be divided into filter centrifuges, sedimentation centrifuges, clarification centrifuges and separation centrifuges

filter centrifuges are more common in industrial production, such as tripod centrifuges, upper suspension centrifuges, horizontal scraper unloading and piston pushing centrifuges

this kind of centrifuge can be used for the separation of suspension with coarser particles or medium containing more solids. The separated filter residue layer is also easy to be washed and dehydrated to obtain dry filter residue. However, it must be required that the filter residue has great compressibility and uniform particles to prevent the filter residue or small particles from passing through or blocking the filter, so it is not suitable for amorphous materials with high dispersion. Since the rotating speed of this kind of centrifuge is within 1500r/min, its separation factor is not large, which is only suitable for the high separation of easily filtrated pulp. This type is often used for the separation of granulated materials such as sugar, ammonium sulfate and ammonia bicarbonate from mother liquor, and it is also widely used in other industries

there is no hole on the drum wall of the sedimentation centrifuge. It uses the difference between the specific gravity of liquid and solid in the suspension. When the drum rotates at high speed, the liquid and solid will settle on the drum wall at different speeds by virtue of centrifugal force. Some sedimentation centrifuges send out the filter residue through the screw conveyor, and the filtrate is discharged from the overflow port. This centrifuge is used to separate materials with large difference in solid phase specific gravity between easy filtration slurry and general filtration slurry, as well as amorphous insoluble materials with high dispersion

there is no hole on the drum wall of clarification and separation centrifuges to separate dilute suspension and emulsion. This kind of centrifuges has a very high speed, generally at 4000, it can effectively reduce the deformation of the main shaft ~15000r/min, and the separation factor f>3500. (end)

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