A horizontal screw centrifuge is a spiral discharge settling centrifuge. It mainly consists of a high-speed drum, a screw conveyor with a hollow shaft that rotates in the same direction as the drum and has a lower speed ratio than the drum, and a differential. When the suspension to be separated is sent into the drum by the hollow shaft, it is immediately thrown into the drum cavity under the centrifugal force generated by high-speed rotation. The high-speed rotating drum generates strong centrifugal force, which throws solid particles with higher density than the liquid phase onto the inner wall of the drum, forming a solid layer (called a solid ring layer due to its ring shape); Due to its low density and centrifugal force, water can only form a liquid layer inside the solid ring layer, known as the liquid ring layer. Due to the different rotational speeds of the spiral and the drum, there is a relative motion (i.e. speed difference) between the two. The relative motion between the spiral and the drum is used to slowly push the sludge in the solid ring layer to the cone end of the drum, and after passing through the drying zone, it is continuously discharged through the outlet distributed around the circumference of the drum; The liquid in the liquid ring layer is continuously 'overflowed' by gravity from the weir to the outside of the drum, forming a separated liquid.

A horizontal spiral centrifuge is a settling equipment that operates continuously and discharges materials horizontally. The drum and the screw rotate at a certain speed difference in the same direction and high speed. The material is continuously introduced into the inner cylinder of the conveying screw through the feeding pipe, accelerated and enters the drum. Under the action of the centrifugal force field, heavier solid substances deposit on the drum wall to form a sediment layer. The feeding spiral continuously pushes the deposited solid phase to the cone end of the drum and discharges it outside the machine through the slag discharge outlet. The lighter liquid phase forms an inner liquid ring, which continuously overflows from the large end overflow port of the drum and is discharged outside the machine through the discharge port.

The horizontal spiral centrifuge is mainly composed of a drum, a screw, a differential system, a liquid level baffle, a drive system, and a control system. A decanter centrifuge utilizes the density difference between solid and liquid phases to accelerate the settling velocity of solid particles under the action of centrifugal force, thereby achieving solid-liquid separation. The specific separation process is that the sludge and flocculant solution are sent into the mixing chamber of the drum through the inlet pipeline, where they are mixed and flocculated (if they are added before the sludge pump or after the pump pipeline, the flocculation reaction has been carried out in advance). Due to the high-speed rotation and frictional resistance of the rotor (spiral and drum), the sludge is accelerated inside the rotor and forms a cylindrical liquid ring layer (liquid ring area). Under the action of centrifugal force, solid particles with high specific gravity settle on the inner wall of the drum to form a mud layer (solid ring layer). Then, the relative velocity difference between the spiral and the drum is used to push the solid phase towards the cone end of the drum. After pushing out the liquid surface (shore area or drying area), the sludge is dehydrated and dried, pushed towards the slag discharge outlet, and the supernatant is discharged from the large end of the drum, achieving solid-liquid separation. The sentence is:. With continuous use, you may ask how to improve the efficiency of the horizontal spiral centrifuge?

Adjustment of the drum speed of the horizontal spiral decanter centrifuge
The spiral decanter centrifuge should use an involute planetary gear differential, so this reducer has a large transmission ratio and high accuracy. On the whole machine, there is a mechanical and electrical dual overload protection device, so it is safe and reliable to use. If the main motor adopts a power frequency speed regulation type, coupled with a hydraulic coupling, it can ensure smooth operation of the motor. The part in contact with the material is made of stainless steel, which has excellent corrosion resistance. At the same time, the drum speed of the horizontal screw centrifuge can also be adjusted.

The working principle of a Decanter Centrifuge is based on the synergistic effect of centrifugal sedimentation and screw conveying. Its core lies in using centrifugal force generated by high-speed rotation to separate substances of different densities, while leveraging the differential motion of the screw conveyor to discharge solid phases and overflow liquid phases. The following detailed description unfolds from three aspects: material movement processes, key physical mechanisms, and principle differences in various separation scenarios:

Attention to maintenance of horizontal spiral centrifuge

The movement of materials in a decanter centrifuge is a dynamic coupling process of centrifugal sedimentation, radial stratification, and axial transportation, involving complex motions in three-dimensional space (radial, axial, and circumferential). The following description unfolds from four key stages: feeding, centrifugal separation, solid discharge, and liquid overflow, analyzing the motion laws in combination with fluid mechanics characteristics:

The horizontal screw centrifuge is suitable for solid-liquid separation treatment of sewage, sludge and other solid and liquid in various industries. It is used in the treatment of papermaking wastewater
It also played a significant role.
During papermaking operations, a large amount of wastewater is discharged from both pulp and paper making. The wastewater generated from pulp production is severely polluted. The wastewater discharged during pulp washing is
Black brown, also known as black water, has a high concentration of pollutants with a BOD of 5-40g/L. It contains a large amount of fiber, inorganic salts, and
Pigments. The wastewater discharged from the bleaching process also contains a large amount of acidic and alkaline substances. The wastewater discharged from the paper machine is called white water, which contains
A large amount of fibers and fillers and adhesives added during the production process.

As a highly precise equipment, it is essential to grasp the selection criteria when choosing a centrifuge. Here we introduce to everyone
The factors to consider when choosing a centrifuge are as follows.
When choosing a centrifuge, the main factors to consider include the following: (1) density, viscosity, and surface tension of the liquid phase material
power. (2) The separation of materials mainly involves solid or liquid phase materials. (3) Particle size, density, and hardness of solid materials
Degree. (4) The flammability and explosiveness of materials. (5) Affinity, concentration, and all charge properties (positive charge) of solid and liquid phase materials
(6) Sludge properties: The higher the organic matter content and oil content of the sludge, the worse the dewatering performance. (7) The material's
rate of recovery. (8) The volatility of materials. (9) The corrosiveness of materials. (10) Speed difference: Its size not only affects processing energy
Strength also affects the processing effect. (11) When solid materials are crystalline products, it is required that the degree of crystal damage during separation be low
There are special requirements for the structure and unloading methods of the equipment. (12) Sludge treatment capacity, for a certain specification of centrifuge, output
The water efficiency changes with the increase of sludge treatment capacity. In order to achieve the expected goal, select the appropriate machine with the appropriate treatment capacity based on the sludge volume
Type is very important.
As long as you can grasp these 12 factors when choosing a centrifuge, you can choose a device that is more suitable for yourself,
It also plays an important role in the development of enterprises

Definition and application fields of bacterial tubular centrifuge
Bacterial tube centrifuge is a device specifically designed for the separation of bacterial cells and bacteria in the biological industry. It has been uniquely designed based on the original tube centrifuge, making it more suitable for the separation of bacterial cells. This device is widely used in various fields such as food, chemical, petroleum, water treatment, and pharmaceuticals

The three-phase horizontal spiral centrifuge (tricanter )is driven by the main motor to rotate the drum at full speed. The material is continuously introduced into the spiral through the feed pipe and evenly distributed to the spiral discharge port. Under the action of centrifugal force, the solid phase settles on the drum wall and is pushed out by the spiral pusher towards the slag outlet of the conical drum. The liquid phase flows out along the spiral towards the overflow hole at the large end of the drum, forming a small end with solid phase and a large end with liquid phase. Separate solid particles from the liquid in the mixture, or separate two immiscible mixtures with different densities.

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