Structure and working principle of decanter centrifuge
Decanter centrifuge is a device that uses the centrifugal force field generated by high-speed rotation to achieve solid-liquid two-phase or solid-liquid-liquid three-phase separation. The main structure of the equipment includes:
Drum (rotating drum): It is the core component of the centrifuge, in which the material completes high-speed rotation and sedimentation separation;
Screw conveyor: It is coaxial with the drum and rotates at a differential speed to push the settled solids to the slag outlet;
Differential (planetary gear/hydraulic differential): It realizes differential speed adjustment between the screw and the drum;
Frame and motor: Support and drive the operation of the entire system;
Feeding system and discharging system: They are responsible for material feeding and the discharge of liquid and solid after separation respectively.
Brief description of the working process:
The mixed material continuously enters the drum from the feed pipe;
Under high-speed rotation, materials with different densities (usually solids and liquids) are separated by centrifugal force;
The solid particles are thrown to the inner wall of the drum and slowly pushed to the slag outlet by the spiral;
The separated clear liquid flows out from the overflow port at the other end of the drum.
This structural design ensures that the horizontal screw centrifuge can operate continuously and automatically discharge slag, greatly improving the separation efficiency and production automation level.
Analysis of technical advantages of horizontal screw centrifuge
1. Efficient continuous separation capacity
Horizontal screw centrifuge can achieve 24-hour uninterrupted operation, with high processing efficiency and strong stability. It is particularly suitable for treating large quantities of industrial wastewater, oil sludge, pomace, protein liquid, etc.
2. High degree of automation
The whole process from feeding, separation, liquid discharge to slag discharge is completed automatically. Combined with the PLC system, remote control and monitoring can be realized, which greatly saves labor costs.
3. Strong adaptability
The equipment can adjust the differential speed and speed to adapt to the viscosity, particle size and density characteristics of different materials. It can also achieve ideal separation effects for high-concentration, high-viscosity and high-density suspensions.
4. Small footprint and easy maintenance
The overall structure of the equipment is compact and occupies a small area; the key components are made of corrosion-resistant and wear-resistant alloy materials, with a long maintenance cycle and low maintenance cost.
5. Energy saving and environmental protection
High-efficiency separation reduces the subsequent processing pressure and pollutant emissions. Some systems can also recover valuable components in the material, with good environmental protection and economic benefits.
Typical application industries of horizontal screw centrifuge
1. Environmental water treatment industry
Municipal sludge dehydration: treatment of sludge in the secondary sedimentation tank or concentration tank of urban domestic sewage treatment plants;
Industrial wastewater treatment: such as wastewater from printing and dyeing, electroplating, papermaking, chemical industry, etc.;
River sludge cleaning: concentration and dehydration of river sludge salvaged ashore;
Aquaculture wastewater treatment: treatment of high-concentration organic wastewater from pig farms, chicken farms, fish ponds, etc.
2. Chemical and pharmaceutical industries
Fine chemical separation: such as pigments, fillers, colloids, catalysts, etc.;
Fermentation broth treatment: separation of antibiotics, yeast, penicillin cells and fermentation broth;
Solid-liquid separation of fertilizers, additives, etc.;
Solvent recovery process auxiliary separation
3. Food and beverage industry
Fruit and vegetable juice separation: processing of extracts such as pomace and vegetable juice;
Starch and protein separation: production of corn starch and potato starch;
Winemaking industry: used for wine lees dehydration and yeast precipitation separation;
Slaughter by-product processing: such as blood and viscera separation.
Common problems and solutions for horizontal screw centrifuges
1. Large vibration of the equipment
Possible causes:
Unbalanced drum or improper installation;
Severe wear of the spiral;
Uneven distribution of solids;
Unsound foundation.
Solution:
Check and redo dynamic balance;
Replace worn parts;
Install shock-absorbing base;
Improve feeding method.
2. Poor separation effect
Possible causes:
Improper differential speed setting;
Feed concentration is too low or viscosity is high;
Insufficient drum speed;
Solid particles are too fine.
Solution:
Optimize differential speed and speed;
-Add coagulant appropriately;
Increase material concentration;
Combined with other equipment (such as flocculation + centrifugal separation).
With its efficient, stable, environmentally friendly and intelligent separation capabilities, the decanter centrifuge plays an increasingly critical role in all walks of life. Whether it is sludge dehydration, oil-water separation, fruit and vegetable juice extraction, or chemical material fine separation, you can see the decanter centrifuge.
As a professional decanter centrifuge manufacturer in China, we always adhere to customer demand-oriented, continuous research and development and innovation, and provide customized solutions. We not only provide customers with high-quality products, but also provide one-stop services such as selection support, on-site commissioning, operation training, and after-sales service to help users achieve efficient, safe, and energy-saving solid-liquid separation.
