Working principle of horizontal screw centrifuge
Horizontal screw centrifuge is a device that uses the principle of centrifugal sedimentation to perform continuous solid-liquid separation. When the equipment rotates at high speed, the mixed liquid enters the drum. Under the action of centrifugal force, the solid particles with high density quickly settle to the outer wall to form a solid slag layer, while the liquid with low density is thrown to the central area and discharged from the internal channel.
The core structure of the horizontal screw centrifuge includes the drum, screw conveyor, differential, drive system and frame. The drum and the screw are installed coaxially, and the relative rotation between the two is achieved through the differential, so that the solids deposited on the inner wall of the drum are continuously pushed to the slag outlet through the screw to achieve continuous separation.
Structural features and technical highlights
As a high-end separation equipment, the horizontal screw centrifuge has many technical advantages in structural design and process manufacturing, reflecting the precision and intelligence of modern manufacturing.
1. High-speed drive system
The core components, the drum and the spiral, are made of high-strength stainless steel materials, processed by CNC milling and dynamic and static balancing processes to ensure stability and safety under high-speed operation. Some models have a maximum speed of up to 4500rpm and a separation factor of more than 3000G, which is suitable for processing materials with small particle size and slight density difference.
2. Accurate differential control
As a key component for controlling the solid phase discharge speed, the differential is directly related to the separation effect and processing volume. Our products adopt a variety of configurations such as hydraulic differential, variable frequency differential or planetary differential, combined with PLC intelligent control system, which can automatically adjust the differential value according to the properties of the material to improve the separation efficiency and dehydration rate.
3. Wear-resistant and corrosion-resistant design
According to different working conditions, the spiral blades can be equipped with a variety of wear-resistant structures such as tungsten carbide hard alloy welding layer, ceramic patch, alloy spraying, etc., which significantly extend the service life of the equipment. For acidic, alkaline or corrosive media, 316L, 2205, 2507 duplex steel and other materials can be selected to build the drum and spiral to comprehensively improve the corrosion resistance.
4. Modular maintenance structure
The equipment design fully considers the convenience of use, adopts a retractable machine cover and a quick-opening structure, which is easy to clean, inspect and maintain, greatly shortening the downtime.
Wide range of industry application scenarios
Due to its wide adaptability, the decanter centrifuge can be used in almost all industrial occasions that require continuous solid-liquid separation. The following are some typical application areas:
1. Municipal sewage and industrial wastewater treatment
In the treatment of high-concentration wastewater such as urban sewage plants, chemical parks, papermaking, printing and dyeing, electroplating, etc., the decanter centrifuge can efficiently remove sludge and reduce water content, saving a lot of energy for subsequent drying or incineration.
2. Food and beverage industry
It is used for soy whey separation, fruit and vegetable juice clarification, starch recovery, fish meal dehydration, lees treatment and other occasions to ensure food quality while improving resource utilization efficiency.
3. Oil, natural gas and sludge treatment
In the process of oilfield produced liquid separation, sludge dehydration, and oily sewage treatment, the decanter centrifuge can achieve efficient oil-water-solid three-phase separation, helping enterprises reduce treatment costs and improve recovery efficiency.
4. Biopharmaceutical and fermentation industry
In antibiotic extraction, cell collection, fermentation broth separation, and vaccine production, the decanter centrifuge can achieve stable separation of high-concentration suspensions or fermentation broths to maintain product activity.
5. New materials and resource recycling
In mine dressing, rare earth extraction, metal recovery, and dehydration of new energy materials (such as lithium battery mud), the decanter centrifuge also demonstrates excellent adaptability and economy.
Selection points and configuration suggestions
Different application scenarios have significantly different parameter requirements for centrifuges. In order to ensure the best operating results, it is recommended that users focus on the following indicators when selecting:
Processing capacity (m³/h): determine the equipment model according to the feed flow rate;
Solid phase concentration: determine the drum volume and spiral thrust configuration;
Material viscosity and particle size: affect the speed, differential speed and cone angle design;
Clear liquid clarity and solid dryness requirements: determine the separation factor and spiral form;
Material corrosiveness and abrasiveness: determine the equipment material and protection level;
Electronic control system requirements: whether additional functions such as remote control, DCS integration, and automatic dosing are required.
Our company provides two supply solutions: standardized and customized, supporting a variety of control logics, drive modes and material combinations to meet users’ dual requirements for performance and economy.
With its high efficiency, energy saving and continuous operation, the decanter centrifuge has become the backbone of modern industrial separation. For enterprises pursuing capacity upgrades, cost savings and environmental compliance, choosing a reliable decanter centrifuge is not only a technological investment, but also a guarantee of future market competitiveness.
We are willing to work with global customers to create clean, efficient and sustainable separation solutions with high-standard manufacturing processes and professional technical services.
