Huading decanter centrifuge is an efficient solid-liquid separation solution for high-solid suspensions, offering excellent clarification and dewatering in continuous processes. Energy-efficient, low-maintenance, and filter-free, it is essential in modern industrial applications.
Solid-liquid separation is a common process in manufacturing. Huading has extensive experience in decanter centrifuge applications, serving a wide range of industries. For handling solid-liquid mixtures with high solid content, the decanter centrifuge is the most efficient choice, offering excellent clarification, maximum dewatering, and effective solid removal during liquid separation.
Our decanter centrifuge technology delivers high-capacity, low-cost, and fast separation solutions for over 2500 applications, suitable for virtually all processes that rely on density differences. Featuring a modular design, our decanter centrifuges are adaptable to various industries worldwide. These machines consist of a high-speed rotating drum, a differential-speed screw conveyor, a drive unit, and a chassis, and are used for tasks such as clarification, separation, classification, concentration, cleaning, and extraction.
High Performance
High G-force for efficient separation at ultra-high speeds.
Touchscreen Control
PLC with HMI for automatic mode settings, sludge dryness adjustments, and alarm monitoring.
Product-based Performance
Adjustable solid transport speed for varying solid loads and dryness.
Flexible Configuration
Multiple material options, wear protection, motor power, and gearbox torque choices to meet diverse needs.
The decanter centrifuge generates high centrifugal force through rapid rotation. This force separates the solid and liquid phases of the feed material based on their density differences. The solid and liquid phases are then continuously discharged through separate outlets. The feed material enters the high-speed rotating screw conveyor through the feed pipe, and is then transported into the centrifuge drum. Under centrifugal force, the material stratifies along the drum wall according to density differences, with the heavier solid phase settling against the drum wall, and the lighter liquid phase flowing towards the liquid outlet.
The solid phase is conveyed to the solid outlet in the conical part of the drum by the differential speed between the drum and the screw conveyor. The liquid phase is discharged through an adjustable height plate at the cylindrical section. This process ensures efficient solid-liquid separation, maintaining stability and continuity throughout the separation.
The decanter centrifuge consists of several key components, including the main motor drive system, auxiliary motor, differential gearbox, screw conveyor, drum, protective cover, base, lifting system, main bearing housing, and lubrication system. Huading focuses on stringent quality control for every detail, ensuring that each component is precision-engineered for optimal performance and long-term stability.
Drum (Bowl)
The drum in modern decanter centrifuges is a cylindrical tube with flanges at both ends. One end is bolted to a liquid discharge hub, while the other end serves as the center for cake discharge or the beach area behind it. The beach section is typically bolted to the flange of the cylindrical part at the end of the drum, ensuring mechanical positioning stability. The thickness of the drum wall depends on the chosen material, maximum rotational speed, and the weight and density of the process materials (feed, concentrate, or cake). These factors will impact the drum’s safe operating speed.
Screw Conveyor
The screw conveyor, designed in an Archimedean screw form, is installed between the beach and the two end hubs of the drum, with a gap of less than 2 1mm. Its primary function is to convey the solids toward the cake discharge port once they are formed, and it also accelerates the feed material’s flow depending on the drum speed. The simplest form of the conveyor features a cylindrical central hub with welded spiral blades, forming a continuous screw. Bearings and seals are installed at both ends of the central hub, with a feed zone chamber between the bearings, isolated by seals.
Gearbox (Differential)
The gearbox is a critical component for generating the differential speed between the drum and the screw conveyor. It is typically driven by a planetary gearbox, which ensures that the screw conveyor rotates slightly slower than the drum. The three main types of gearboxes used are planetary gearboxes,hydraulic differential and Cycloid gearboxes, both of which provide stable differential drive to ensure effective solid conveyance and dewatering.
Frame and Enclosure
The frame is usually made of steel channels or box-type steel to provide rigid support for the rotating components. The main bearing housing surfaces are precisely machined and aligned to ensure that the rotating components are properly centered, preventing end-to-end misalignment that could lead to premature bearing failure. The enclosure protects the rotating components and acts as a barrier between the high G-force field and the surrounding stationary area.
Main and Rear Drive
The main drive motor of the centrifuge is typically mounted on a slide rail on the frame or subframe, connected via a V-belt to the centrifuge drive pulley. The motor on larger decanter centrifuges can consume several hundred kilowatts of power and is often mounted directly on the floor, with a special belt tensioning device used to create the differential motion between the rotating components. The drive system controls the speed of the small gear shaft of the gearbox (thus controlling the differential speed of the screw conveyor) using motors or brakes, ensuring efficient and stable separation.
Decanter centrifuges are widely used in various industries, including food and fermentation, chemical and pharmaceutical manufacturing, and biotechnology. In addition to research and development (R&D) applications, decanter centrifuges have proven to be highly effective in the production of high-quality products, especially where material flow rates are below 100 L/h.
Huading decanter centrifuges feature various discharge port designs tailored to meet specific industry needs:
Huading decanter centrifuges provide exceptional flexibility in separating various phases, including:
Huading decanter centrifuges can operate under diverse process conditions, including gas-tight, vapor-tight, or pressurized environments. They offer low vibration levels and can function under absolute pressures from 0 to 8 bar and temperatures ranging from -90°C to +200°C. With the ability to handle CIP (Clean-in-Place) cleaning, they meet stringent cleanliness and safety standards.
BD plate technology in Huading decanter centrifuges improves solid-liquid separation by reducing the moisture content of activated sludge and enhancing solid recovery rates. This technology operates at lower speeds, which not only reduces energy consumption but also minimizes the use of chemicals.
Designed with durability in mind, Huading decanter centrifuges feature targeted wear protection configurations. Components such as titanium, pure nickel, or Hastelloy materials are used in demanding applications to prevent corrosion and extend the lifespan of the centrifuge. These measures reduce maintenance costs and ensure continuous, stable operation without frequent part replacements.
The compact design of Huading decanter centrifuges offers high throughput while minimizing the need for extra space. The self-contained system requires no additional peripheral equipment, making it suitable for installations with limited space.
Huading decanter centrifuges feature advanced counter-current washing and efficient dewatering systems. The solids are dewatered through drainage and compression, depending on the nature of the material, while the appropriate combination of conveyor geometry and differential speed ensures optimal transport and discharge, even for shear-sensitive or paste-like solids.
The special solids discharge geometry (gutter) allows for direct mixing of dewatered solids with liquid at the discharge point, eliminating the need for additional mixing vessels and further streamlining the process.
Regular maintenance reduces the risk of unplanned downtime and costly repairs. Below are the essential maintenance steps and recommended intervals for routine checks.
Operators should perform a quick daily check to identify potential issues. Focus on:
On a weekly basis, operators should conduct more detailed inspections:
Monthly maintenance involves more thorough checks to ensure the machine remains in good condition:
Once a year, operators should perform an in-depth evaluation of the centrifuge to ensure all components are functioning properly:
By adhering to these maintenance procedures, operators can enhance the performance and lifespan of Huading decanter centrifuges, while minimizing downtime and operational costs. Regular maintenance ensures the continued high performance and reliability of the equipment.
If you need to stay in touch with Huading separator, there are a few ways to do so. You can send an email to info@huading-separator.com, give us a call at +86-510-8783-6501, or fill out the form on our website. We'll be sure to get back to you as soon as possible.
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