With the increasing development of industrialization, solid-liquid separation is a key link in various production processes, and its efficiency directly affects the production capacity, energy consumption and cost of the entire system. Especially in the chemical, environmental protection, food, biological, energy and other industries, the process requirements of solid-liquid separation are evolving towards high efficiency, continuity, automation, and low energy consumption.
Among many separation equipment, the Decanter Centrifuge has gradually become the preferred equipment for continuous solid-liquid separation in modern industry with its advantages of continuous feeding, continuous dehydration, and automatic slag discharge. Especially for the treatment of high-solid content and high-viscosity materials, the Decanter Centrifuge shows advantages that are difficult to match with other separation equipment.
Working Principle of Decanter Centrifuge
1. Basic Working Principle
The basic structure of the horizontal screw centrifuge consists of a drum, a screw conveyor, a differential, a main bearing, a feeding system and a slag discharge system. Its working principle is based on the solid-liquid density difference in the centrifugal field for separation.
The material continuously enters the inner cavity of the drum through the feed pipe;
Under the centrifugal force of high-speed rotation, the solid phase particles with higher density are thrown to the inner wall of the drum to form a sediment layer;
The screw conveyor rotates slowly at a small differential speed relative to the drum, continuously pushing the deposited solids to the small end of the drum and discharging them;
The separated liquid overflows and discharges along the large end of the drum, realizing continuous solid-liquid separation.
2. The role of the differential
The differential is one of the core components of the horizontal screw centrifuge, which determines the speed difference between the screw conveyor and the drum. Reasonable differential speed regulation can achieve the best solid phase transportation and clear liquid quality, and adapt to different material properties.
Key advantages of decanter centrifuge in continuous solid-liquid separation
1. Continuous operation, higher efficiency
The decanter centrifuge’s continuous feeding, continuous dehydration, and continuous slag discharge are carried out simultaneously, greatly improving the processing capacity, especially suitable for industrial production lines that run continuously for 24 hours. For example, sewage treatment plants, chemical mother liquor concentration processes and other links all require long-term stable operation.
2. High degree of automation, reducing manual intervention
Modern decanter centrifuges are equipped with PLC automatic control systems, supporting one-button start and stop, real-time differential speed adjustment, automatic speed matching and other functions, which can achieve unattended operation and reduce operation intensity and misoperation risks.
3. Wide adaptability to materials
Whether it is high-concentration suspension, flocculated sludge, or mixed liquid containing crystals, fibers, and oily substances, decanter centrifuges can effectively separate and are suitable for a variety of industry needs.
4. Wear-resistant and corrosion-resistant, low maintenance cost
The use of 2205 duplex stainless steel, carbide spraying and other processes greatly extends the service life of key components; high wear areas such as spiral blades and discharge ports can be locally strengthened, with a long maintenance cycle and good economy.
5. Energy saving and environmental protection, high recycling rate
The separated liquid is clear and transparent, and the solid moisture content is low, which can greatly reduce the burden of subsequent processing and improve the recycling efficiency; the motor system adopts variable frequency speed regulation and energy-saving control, with lower energy consumption.
Typical industry application analysis
1. Chemical industry
Application scenarios: crystallization mother liquor separation, catalyst recovery, organic solvent separation.
Process requirements: corrosion resistance, resistance to organic solvents, high separation efficiency at high concentrations.
Configuration suggestions: 2205 duplex steel + ceramic patch + corrosion-resistant sealing system.
2. Environmental protection industry
Application scenarios: urban sludge treatment, industrial wastewater dehydration, hazardous waste volume reduction.
Process requirements: adapt to high solid content, strong continuous operation capability, simple maintenance.
Configuration suggestions: tungsten carbide spray spiral, dual motor drive system, automatic anti-blocking control.
3. Food and beverage industry
Application scenarios: juice, vegetable protein, lees, dairy product dehydration.
Process requirements: clean, food grade, no material pollution.
Configuration suggestions: 304/316L food grade contact surface, CIP online cleaning design, sanitary seal.
4. Biopharmaceutical industry
Application scenarios: fermentation broth separation, cell recovery, bacterial removal.
Process requirements: sterile environment, high-precision separation, strong corrosion resistance.
Configuration recommendations: fully sealed structure, titanium alloy drum, variable frequency intelligent control system.
With the continuous upgrading of manufacturing technology, Chinese decanter centrifuge manufacturers are gradually breaking the monopoly of international brands and making significant breakthroughs in equipment performance, technology integration, cost performance, etc. We always adhere to the development concept of “technological innovation + lean manufacturing + customer orientation” and are committed to providing efficient, reliable and intelligent solid-liquid separation solutions to global customers.
