Basic principles and structural features of horizontal screw centrifuge
Horizontal screw centrifuge is a high-efficiency equipment that uses the principle of centrifugal force to achieve solid-liquid separation. Its basic working process is: the mixed liquid enters the drum from the feed pipe. Under the centrifugal force generated by high-speed rotation, the solid phase particles with high density quickly settle on the drum wall and are pushed to the slag outlet by the screw conveyor for discharge; while the liquid phase with low density overflows along the liquid layer to the liquid outlet, realizing a continuous and automatic separation process.
The equipment structure mainly includes:
Drum system: one of the core components, determining the centrifugal strength;
Screw conveyor: responsible for discharging the separated solid materials;
Differential: adjusts the relative speed between the drum and the screw, which is the key control parameter;
Drive system: includes main motor, auxiliary motor and frequency converter to achieve precise control;
Control system: adopts PLC automatic control, with adaptive speed regulation, alarm, remote control and other functions.
Performance advantages
1. Efficient separation capability
Thanks to the powerful centrifugal force field, the decanter centrifuge can effectively separate solid particles as small as 1 micron, especially suitable for the treatment of high solid content and high viscosity materials, such as oil sludge, coal sludge, fruit and vegetable residues, papermaking wastewater, etc.
2. Strong continuity and stable operation
Compared with traditional intermittent separation equipment, the decanter centrifuge can achieve all-weather continuous operation, greatly improving production efficiency, reducing the frequency of manual operation, and reducing operating costs.
3. High degree of automation
Modern decanter centrifuges are generally equipped with intelligent control systems, with functions such as automatic feeding, automatic slag discharge, real-time parameter monitoring, and remote control, which greatly simplifies the operation process and improves the safety and stability of the system.
4. Wide adaptability
Whether the solid content of the suspension is 1% or the slurry is as high as 40%, the decanter centrifuge can respond flexibly; it is suitable for water treatment, food, biology, chemical industry, pharmaceutical, environmental protection and other industries, with extremely high versatility.
5. Energy saving and environmental protection
The use of variable frequency speed regulation and energy recovery system not only reduces equipment power consumption, but also reduces noise and vibration; the separated clear liquid can be reused, and the solid slag can be processed as a resource, helping enterprises achieve the “dual carbon” goal.
Typical application cases
(1) Urban sludge dehydration project
In a municipal sewage treatment plant, we customized a horizontal screw centrifuge system to replace the original plate and frame filter press process. After the new system was put into operation, the processing capacity increased by 30%, and the sludge moisture content dropped to below 75%. After the drying equipment was equipped, it can be directly used for fuel rod production to achieve resource recycling.
(2) Food processing industry
After a juice processing plant introduced our customized food-grade horizontal screw centrifuge, it achieved efficient separation of pomace and juice, increased juice clarity by 20%, and significantly increased production. It also obtained European and American food equipment certification and successfully entered the overseas market.
(3) Oilfield drilling mud treatment
In an oilfield operation area in Xinjiang, our horizontal screw centrifuge is responsible for the separation and recovery of drilling fluid mud, effectively reducing the consumption of drilling fluid by more than 80%, saving customers more than one million yuan each year.
(4) Plant extraction industry
The horizontal screw centrifuge system provided to a well-known Chinese medicine company in China can achieve efficient separation of impurities and residues in Chinese medicine extracts, improve the clarity of the extracts and the content of effective ingredients, and significantly improve the purity of the medicines.
Selection Guide
Choosing a suitable decanter centrifuge is not only related to the return on investment of the equipment, but also determines the subsequent operating costs and treatment effects. We recommend a comprehensive evaluation from the following aspects:
1. Processing material characteristics
Such as solid content, particle size distribution, viscosity, density difference, etc., are key factors affecting model selection and configuration parameters (differential speed, aspect ratio, etc.).
2. Processing capacity requirements
Determine the specifications and models of the decanter centrifuge according to the daily processing volume (m³/d or t/h), ranging from LW250 to LW720. We can provide customized solutions for enterprises of different sizes.
3. Slag dryness requirements
Is high dryness required for subsequent transportation or incineration? Different process goals require different structures, such as deep tank drum, variable pitch structure, dual motor control, etc.
4. Installation space and supporting conditions
Considering the plant area, power supply, water source, environmental humidity, anti-corrosion requirements, etc., we provide frame structure optimization and refractory customization services.
Facing the global trend of industrial intelligence and greening, the decanter centrifuge will continue to play its irreplaceable separation efficiency and wide adaptability. Our company will continue to adhere to the development concept of “customer-oriented, technological innovation, quality first”, win more customer trust with high-quality products and services, and build a green and efficient industrial ecosystem with global partners.
