Centrifugation is the use of a powerful centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation velocity of the particles in the liquid, separating the sedimentation coefficients and buoyancy-density materials in the sample. Therefore, it is necessary to use a centrifugal machine to generate a strong centrifugal force in order to force these particles to overcome the diffusion to produce a settling motion.

Horizontal piston discharge centrifuge search

Working cycle: continuous feeding, separation, washing and drying at full speed, the piston continuously pushes and unloads.

Working characteristics: continuous operation at constant speed, automatic continuous feeding, hydraulic pulsation piston unloading, can achieve unattended, automatic operation.

Structure: drum, screen, pusher tray, cloth bucket, hollow shaft, push rod, composite cylinder, casing, frame, hydraulic system, etc.

Widely in: chemical, fertilizer, pharmaceutical, sugar and other industries.

Advantages: 1 High efficiency, high output and stable operation. 2 It can automatically load and unload, and realize unattended 3. It has strong adaptability to materials and adapts to the suspension of coarse and medium particles.

Disadvantages: 1 Not suitable for fine particle suspensions. 2 It is sensitive to concentration fluctuations and is prone to leakage. 3 The structure is relatively complicated. The pusher plate is reciprocated, the number of reciprocations is 20~30 times/min; the stroke is 1/10 of the length of the drum.

This centrifuge is classified as: 1 single-stage piston pusher centrifuge. 2 multi-stage piston push-type centrifuge - each stage is short, the slag is easy to push, the filter residue layer is thin, and the filter residue stays for a long time, which is good for dehydration and washing.

Centrifugal inertial force unloading centrifuge search

Also known as: cone basket centrifuge. The type of centrifuge: vertical cone basket type; horizontal cone basket type.

Working cycle: continuous feeding, separation, washing, drying and unloading at full speed.

Working characteristics: working at full speed, automatic feeding and unloading, no special unloading device.

Structure: Conical drum, filter, feed tube, distributor, spindle, housing, vibration isolator, motor, etc.

Advantages: 1 Simple structure, small size and low cost. 2 High efficiency and low power consumption. 3 Can be automatically loaded and unloaded, unattended.

Disadvantages: 1 sensitive to material properties, concentration changes, poor adaptability. 2 The material residence time is not easy to control, and it is easy to produce running liquid.

Principle of filter residue movement: (ignoring the gravity of the particles)

Widely used: chemical, small fertilizer, pharmaceutical, food and so on.

Second, the decanter centrifuge

Principle: There is no hole on the drum, and there is no filter. The suspension rotates at high speed with the drum. Due to the different specific gravity of the solid and liquid phases, different centrifugal inertia forces are generated. The solid phase particles with large centrifugal force are deposited on the inner wall of the drum, and the liquid phase settles in the inner layer, and then respectively Different outlets are discharged to achieve the purpose of separation.

The decanter centrifuge generally has a higher speed: n=7000~8000rpm

Adaptation range: less solid phase content and smaller solid particles (d < 10 μm).

Common models: screw unloading. Divided into:

(1) Screw discharge type sedimentation centrifuge (with: horizontal; vertical)

(2) scraper discharge horizontal sedimentation centrifuge

(3) Three-legged sedimentation centrifuge

Screw unloading sedimentation centrifuge search

Widely used: chemical, petroleum, metallurgical, pharmaceutical, light, food, sewage treatment, for processing particle size d <10μm suspension.

Working characteristics: continuous feeding, separation, unloading, full speed operation, high speed n=7000~8000rpm.

Working principle: The suspension enters from the center. Under the action of centrifugal force, a circular liquid pool is formed in the drum, and the heavy phase particles settle to the inner surface of the drum to form sediment, which is pushed by the spiral blade to the small end of the drum. The large end cap of the drum has a circularly arranged overflow hole, and the clarified liquid is discharged from the overflow hole.

The main operating parameters of the screw discharge sedimentation centrifuge are: the number of revolutions of the drum, the difference between the rotation speed of the drum and the conveying screw, the position of the overflow port and the feeding speed; the main structural parameters are: the inner diameter D of the big end of the drum, The length of the drum is L, the length-to-diameter ratio of the drum is L/D, the half cone angle α of the drum, and the number of spiral heads and pitch of the conveying screw.

The main advantages of the spiral discharge sedimentation centrifuge: automatic continuous operation, no need for filter cloth, long-term continuous operation, easy maintenance; wide application range, can be used for solid liquid removal, liquid clarification, solid particle size classification, and Liquid-liquid-solid separation; good adaptability to materials, the range of solid particle size that can be separated is 0.005mm-2mm, and the volume concentration range of suspension is 2%-40%. Concentration fluctuation has little effect on the separation effect; compact structure, easy to achieve structurally closed, closed machine can operate under a certain positive pressure; single machine production capacity is large (mainframe can reach 190m3/h), operating cost is low, accounting for The area is small.

The disadvantage of the screw discharge sedimentation centrifuge is that the liquid content of the sediment is generally high; although the sediment can be washed, the washing effect is not good; the structure is complicated and the machine cost is high.

Settling - Filter Centrifuge Search

Drum: divided into: settling section and filter section

1. Settlement section: the form has a cylindrical shape and a conical shape; the full conical shape.

Function: The suspension enters the settling section, sedimentation is separated, and the clear liquid overflows from the big end overflow hole; the sediment is transported by the screw conveyor to the filter section for filtration and dehydration.

2. Filtration section: The form is cylindrical, with a sieve and a mesh.

Function: The sediment is filtered through the screen in this section, the liquid is separated, and the filter residue is discharged from the large hole at the left end. If the filter residue requires washing or drying, the Center Hole is passed through a washing liquid or steam, and the filter residue is washed in the filtration section.

Screen reversal: Compressed air or clean water is supplied from the back-blowing tube, and the screen is back-flushed to make it new.

Spiral-disc centrifuge search

Mechanism: Horizontal spiral discharge centrifuge and butterfly separator are composed of two parts.

Function: The spiral discharge centrifuge separates the solid and liquid; the butterfly separator further processes the liquid to obtain a liquid product with high clarity.

Drum: It consists of two parts: the main separation chamber and the auxiliary separation chamber.

Main separation chamber: It is a horizontal screw centrifuge, which mainly performs solid and liquid separation. Most of the solid particles are separated and discharged by a screw conveyor.

Auxiliary separation chamber: a butterfly separator, which further separates the liquid and separates finer particles.

working principle:

The suspension enters the spiral centrifuge section from the center tube, and the solid particles are separated from the liquid by the centrifugal force at a high speed, and the sediment is discharged from the small end discharge hole by the conveyor.

The liquid enters the butterfly separator through the overflow end of the centrifuge end, and the solid-liquid separation is performed again. The fine particles are discharged from the peripheral holes, and the high-clarity liquid is discharged from the central overflow hole (9).

Xinxiang sunrise  precision Machining Center, which is optimized and designed by finite element method, integrates functions of milling, boring, drilling, tapping and 3D mold processing, and is equipped with a library of 40 ~ 60 cutting tools.The control system has the ability of multi-axis linkage.Equipped with high-precision worktable, right-angle milling head accessories, can complete the processing of five and complex three-dimensional surface.It is the best choice for heavy machinery industry such as metallurgy, energy, electric power and large Parts Processing field.

Machining Center

Machining Center,Horizontal Machining Center,Vertical Machining Center,Mighty Gantry Machining Center

Xinxiang Sunrise CNC Bearing Equipment Co., Ltd. , https://www.cncsunrise.com