Principle Introduction

Bowl Sedimentation + Differential-Speed Screw Conveying

The decanter centrifuge generates centrifugal force through a high-speed rotating bowl, causing solid particles in the material to settle onto the inner wall of the bowl. The screw conveyor rotates at a certain differential speed relative to the bowl and continuously pushes the settled solids toward the solids discharge outlet, enabling continuous feeding, continuous separation, and continuous solids discharge.

Specifically, after the material enters the bowl through the feed pipe, sedimentation and separation take place in the centrifugal field generated by high-speed rotation. Solid particles settle onto the inner wall of the bowl, while the screw conveyor continuously conveys the solid phase toward the solids discharge outlet through the differential speed between the screw and the bowl. The separated liquid phase is discharged through the liquid overflow outlet.

Simply put, the bowl is responsible for sedimentation, the screw is responsible for conveying, and the differential speed between the bowl and the screw affects the conveying and separation conditions of the solid phase.

Key Advantages

High Throughput: Suitable for high-flow continuous production.

High Solid Content Handling Capacity: Capable of processing materials that are difficult for disc stack centrifuges to handle.

Continuous Solids Discharge: No need to stop the machine for solids discharge.

Continuous Operation: Suitable for 24-hour industrial production.

Solid Dewatering: Reduces the moisture content of the solid phase and lowers downstream processing costs.

Product Specifications

Application Fields

The decanter centrifuge is suitable for solid-liquid separation processes requiring continuous feeding, continuous separation, and continuous solids discharge. It is particularly suitable for separation processes involving high throughput, high solid content, and continuous discharge of the solid phase. Its applications cover food and beverage processing, plant extraction, wastewater treatment, and oil and fat processing.

Food & Beverage: Used for fruit and vegetable juice residue separation, bean processing, starch processing, plant protein extraction, and other processes.

Plant Extraction: Used for residue-liquid separation in plant extracts and related extraction liquids, suitable for high-fiber material processing and high-throughput continuous production.

Wastewater Treatment: Used for municipal sludge dewatering, industrial wastewater treatment, and sludge reduction. Continuous solids discharge enables solid-liquid separation of sludge and supports continuous wastewater treatment processes.

Oil & Fat Processing: Used for the separation and refining of palm oil, olive oil, animal fats, and other materials, meeting solid-liquid separation requirements in oil and fat processing.

Typical Separation Tasks: Sludge dewatering, industrial wastewater treatment, palm oil, olive oil, and plant protein.

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Principle Introduction

A disc stack centrifuge is a vertical sedimentation centrifuge that uses the powerful centrifugal force generated by the high-speed rotation of the bowl to separate components with different densities in a mixture according to differences in their settling velocities.

A set of conical discs is stacked inside the bowl, with narrow gaps between the discs. The suspension or emulsion enters through the central feed pipe and flows upward through the gaps between the discs. Under the centrifugal force, denser solid particles settle onto the inner surfaces of the discs, slide outward, and accumulate at the maximum diameter of the bowl. The lighter liquid flows inward along the outer surfaces of the discs and is eventually discharged through the liquid outlet.

The key function of the disc stack is to shorten the settling distance of particles and significantly increase the settling area, thereby greatly improving separation efficiency and processing capacity.

Disc Stack Centrifuge Structure

The disc stack centrifuge consists of four major sections:

(1) Stationary Section

Base, housing, feed pipe, liquid discharge pipe, bearing housing, and vibration isolator.

Function: Supports the entire machine, collects and discharges the separated materials, and isolates vibration.

(2) Rotating Section

Bowl body, upper cover, locking ring, disc stack, distributor, central feed pipe, main shaft, and centripetal pump.

Function: Generates a high-speed centrifugal force field. The disc stack increases the settling area to achieve separation of light and heavy phases.

(3) Solids Discharge Section

Sliding piston, operating water chamber, solids discharge port, and operating water valve/solenoid valve.

Function: In models with automatic solids discharge, the sliding piston is controlled by operating water to discharge the solid phase at preset intervals and quantities.

(4) Drive and Control Section

Motor, variable frequency drive, transmission system, upper and lower bearings, seals, sensors, PLC control cabinet, lubrication system, and cleaning system.

Function: Provides power, speed control and braking, safety interlocking, and automated operation.

Working Process

The material enters the disc stack through the central feed pipe and distributor. In the centrifugal force field, the light phase moves toward the center, while the heavier phase and solid phase move outward and are discharged separately. During solids discharge, the sliding piston opens the solids discharge port and automatically returns to its original position after discharge.

Product Specifications

Application Fields

The disc stack centrifuge is suitable for fine solid-liquid separation, efficient clarification, and multiphase separation. It is used across food and beverage processing, plant and traditional Chinese medicine extraction, biopharmaceutical processing, and industrial separation.

Food & Beverage: Used for continuous clarification during production to reduce the filtration load in downstream processes. Suitable for beer, wine, fruit juice, dairy products, plant-based beverages, edible oils, and other materials.

Plant & Traditional Chinese Medicine Extraction: Moves efficient solid-liquid separation upstream to the extraction stage. Suitable for plant extracts, traditional Chinese medicine extracts, essential oils, natural products, and other materials.

Biopharmaceuticals: Designed for high-load solid-liquid separation requirements in biopharmaceutical processes. Applications include vaccines, monoclonal antibodies, recombinant proteins, enzymes, biological products, fermentation broth, cell harvesting, and microbial cell harvesting.

Industrial Applications: Used for liquid clarification, oil-water separation, and multiphase separation in industrial processes.

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The Navector High-Speed Intelligent Screening Machine is a newly upgraded high-performance fine screening system developed based on the original ultrasonic small particle screening machine. It is specifically designed for the screening of ultrafine powders with a D50 particle size and particles below 1 μm.

The machine adopts low-frequency, high-speed vibration technology with a speed range of 0–3000 rpm and stepless speed regulation, allowing screening parameters to be flexibly adjusted according to different material characteristics. At the same time, it retains the classic flower-disc adjustment structure, achieving simultaneous improvements in screening accuracy and processing capacity.

To meet the growing demand for ultrafine powder screening driven by the rapid development of the new energy industry, including solid-state batteries, lithium iron phosphate batteries, and ternary batteries, the Navector High-Speed Screening Machine effectively addresses common issues encountered by traditional screening equipment, such as mesh blinding, poor classification efficiency, and insufficient throughput. It provides a more stable and efficient screening solution for the production of advanced energy materials.

Principle Introduction

The Navector High-Speed Screening Machine utilizes low-frequency, high-speed vibration technology combined with a 0–3000 rpm stepless speed control system, enabling materials to disperse rapidly across the screen surface and pass through the mesh efficiently. For ultrafine powders that are prone to agglomeration and mesh blinding, the machine improves screening efficiency and classification accuracy by optimizing material movement trajectories and screening conditions.

Combined with the high-performance Magnetet screen mesh, the system minimizes mesh blinding and particle lodging while extending screen service life. While maintaining high screening accuracy, it delivers greater processing capacity and continuous stable operation, making it particularly suitable for precision screening and classification of ultrafine powders in lithium battery, solid-state battery, and related industries.

Equipment Advantages

• High Screening Accuracy:Specifically optimized for ultrafine powders with a D50 particle size and particles below 1 μm, the machine effectively improves incomplete screening and poor classification issues commonly found in conventional screening equipment, enhancing particle size consistency.
• Significantly Increased Throughput:Utilizing low-frequency, high-speed vibration technology, the machine greatly increases processing capacity while maintaining high screening accuracy. Throughput can reach up to five times that of conventional screening machines and three times that of traditional small particle screening machines.
• Extended Screen Mesh Service Life:Equipped with the Magnetet specialized screen mesh as standard, featuring high tension, excellent wear resistance, and high screening efficiency. The mesh tension can reach 50 N, with a service life 2–3 times longer than ordinary screen meshes.
• More Flexible Parameter Adjustment:The 0–3000 rpm stepless speed control system allows operating speed to be flexibly adjusted according to different material properties.
• Low Upgrade Cost:Existing small particle screening machines can be upgraded without replacing the entire machine. Only the variable-speed motor and control system need to be upgraded, resulting in lower investment and faster returns.
• Ideal for New Energy Ultrafine Powders:Developed specifically for ultrafine materials such as sulfide solid electrolytes, high-nickel single-crystal materials, and single-crystal lithium iron phosphate fine particles. It effectively reduces mesh blinding, improves classification performance, and increases throughput for long-term stable operation.

Applications

Widely used in industries such as solid-state batteries, lithium batteries, advanced materials, electronic materials, and fine chemicals. It is suitable for the precision screening and classification of sulfide solid electrolytes, high-nickel single-crystal materials, single-crystal lithium iron phosphate fine particles, conductive additives, and other ultrafine powder materials, meeting the requirements for both high-precision and high-capacity production.

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Principle Introduction

The system consists of a vacuum pump (oil-free and water-free), a laminated bag filter, compressed air back-blow device, pneumatic discharge valve, vacuum hopper, adjustable stainless steel suction gun, and conveying hose.

Product Details

The 3D Printing Powder Vacuum Feeder is a dust-free, fully enclosed pipeline conveying system designed to transport granular and powdered materials using vacuum suction. By leveraging the pressure difference between the vacuum and the surrounding environment, gas flows through the pipeline, carrying the powder along and completing the material transfer process.

Imported vacuum technology, continuously improved and refined in China, is now widely applied across various light and heavy industries, including chemical, pharmaceutical, food, metallurgical, building materials, and agricultural sectors.

The 3D Printing Powder Vacuum Feeder operates in a fully enclosed pipeline, eliminating dust pollution, improving working conditions, and reducing contamination of materials by the environment or personnel, thereby enhancing cleanliness. Its compact pipeline design allows powder transport in confined spaces while maintaining an orderly workspace. It is also unrestricted by distance and significantly reduces manual labor while improving operational efficiency, making it the preferred method for most powder handling applications.

Equipment Advantages

• The aluminum powder-specific vacuum feeder offers high flexibility due to its tubular design. Common installation configurations include horizontal, vertical, inclined, and curved layouts, as well as advanced three-dimensional arrangements for complex conveying paths.
• This vacuum feeder features a high degree of automation and is equipped with an optimized external lubrication system. In case of malfunction, the system automatically shuts down, ensuring strong operational safety.
• Powered by a vortex pump that is oil-free, water-free, and maintenance-free.
• Fully enclosed conveying process eliminates dust pollution.
• Modular “building block” structure with quick-release clamp connections for easy cleaning.
• Low energy consumption, low noise, and convenient control.
• Unique S-shaped flanges between hoppers further prevent powder leakage.

The 3D Printing Powder Vacuum Feeder is primarily used for transporting powders and granules, such as active pharmaceutical ingredients, chemical powders, metal oxide powders, capsules, tablets, pellets, and small food granules. It is not suitable for extremely wet, sticky, or excessively heavy materials.

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Principle Introduction

A vacuum generator or vacuum pump is used to generate a vacuum, and the negative pressure generated by the vacuum sucks the material from the inlet. The air is then separated from the material in the filter bin of the separator vessel. The material falls automatically due to gravity and is collected in the silo. Our cyclones prevent fine powders from entering the filter to improve the efficiency of the filter.

When the silo is full of material, the vacuum pump automatically shuts down, and the pressure in the conveying equipment reaches equilibrium. The discharge valve is opened, and the material flows out through the discharge port and falls directly into the storage container. When discharging, the filter element is automatically cleaned by a back-blowing air bag. If the material is more viscous, we can install a special vibrator to assist in discharging. At the end of the blanking, the discharge compartment is automatically closed, and the whole conveying process is started again.

Equipment Advantages

• Smooth modular design: The modular design not only makes the installation and maintenance simpler, but also more convenient to disassemble and wash, and eliminates the existence of dead ends. When cleaning, the design of the clamps between the various modules of the equipment allows the conveyor to be easily removed and installed. The equipment does not have gaps and dead corners that are easy to accumulate materials.
• Fluidization device: The fluidizer is to produce a layer of air mold between the material and the inner wall of the conveyor silo, through which the air film can effectively help the flow of materials with poor fluidity, which not only prevents the material from bridging, but also improves the unloading efficiency. The fluidizer material is sintered polyethylene, which meets the requirements of FAD.
• Back-blowing system: built-in one-to-one back-blowing airbag, pulsed gas back-blowing, each cycle can efficiently clean the filter, making the equipment performance more stable.
• Filtration system: Japan Toray polyester coated filter element anti-static filter element, filtration accuracy up to 0.3 μm, maximum working temperature 130°C. Imported from Japan, it can be cleaned with alcohol, water, and compressed air, and can be used repeatedly for a long time.
• Intelligent control system

Food industry additives, candy, cocoa pills, cocoa powder, crystals, etc.
Industrial raw materials, waste materials and other materials, agricultural bulk materials.
Powdered materials, granular materials, mixed materials, tablets, capsules, etc. in the pharmaceutical industry

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Product Details

Vacuum conveying for ternary materials is widely used for pipeline transportation of powder materials, primarily solving the problems of high labor intensity in manual handling and enabling automated material feeding.

The vacuum conveyor forms an integrated production line, significantly improving automation levels. Its structure and operating principle are simple and technically mature, typically equipped with pulse back-blowing, dust removal technology, and vacuum generators.

Equipment Advantages

• Self-designed discharge bottom valve with high efficiency and low energy consumption, excellent sealing performance, and low operating costs.
• Titanium metal membrane filtration, reusable and effective in addressing material blockage and wear issues.
• Static-free material handling to maintain material quality during transportation and prevent layering problems.
• Barrel-style docking structure allows tool-free disassembly, making cleaning and maintenance simple and convenient.
• Multiple models available to meet production capacity requirements for different materials.
• Power sources can utilize compressed air or vacuum pumps.

Suitable for industries such as pharmaceuticals, food, chemicals, new materials, energy, and 3D printing.

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Equipment Advantages

The vacuum feeder for granular materials uses sealed pipeline conveying, which eliminates dust pollution, improves the working environment, and reduces contamination of materials by the environment and personnel, thereby enhancing cleanliness.

Since it relies on pipeline transportation, it occupies little space and can convey powders even in narrow areas, making the workshop environment neat and aesthetically pleasing.

It is also not limited by long or short distances. Additionally, the vacuum feeder reduces manual labor intensity and improves work efficiency — making it an excellent choice for most powder material conveying methods.

Product Structure of Vacuum Feeder for Granular Materials

The vacuum feeder mainly consists of three parts:

1.Vacuum Power Unit：Common vacuum power sources include

Roots vacuum pump

Turbine vacuum pump

Vacuum generator

Water ring vacuum pump
The main function is to provide sufficient vacuum negative pressure airflow.

2.Gas–Material Separation Unit (Main Machine)
There are two main types:

Continuous vacuum feeder

Intermittent vacuum feeder
Currently, the market trend favors continuous vacuum feeders, especially those designed for long-distance and high-capacity conveying — and this will remain the mainstream direction.

3.Control System
The control system mainly has two types:

Microcontroller (simple system): limited functions and programming options, suitable for basic working conditions.

PLC control: widely applicable and allows customized programming based on site conditions.

Common Faults of Vacuum Feeders:

1.Low vacuum and no suction
First, check the pipeline and equipment connections to see if any clamps are loose and causing air leakage.

2.Remove the inlet of the vacuum pump and check whether the pump is functioning normally.3.Material blockage
Check for blockages in the pipeline or filter element using a sectional inspection method.

The gas–solid mixing ratio in vacuum feeding is a key parameter in pneumatic conveying. It represents the ratio of powder mass to air mass passing through the conveying pipe section per unit time. Increasing the mixing ratio can enhance conveying capacity and reduce energy consumption. However, if the ratio is too high under the same conveying speed, it may cause blockages and require higher conveying pressure. Therefore, during design, factors such as material properties, conveying method, and operating conditions should be comprehensively considered to select an appropriate mixing ratio.

The scope, design, and installation of pneumatic conveying systems are complex and involve many variables. If any link is improperly designed or executed, it may increase operating costs and affect system reliability. We have extensive experience in helping customers design pneumatic conveying systems. Follow us to learn more and design a conveying solution that suits your needs.

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Product Introduction

Operating Steps of the Powder Vacuum Conveying Machine

1. Equipment Inspection
Before using the vacuum conveying machine, users must inspect the equipment to ensure it is functioning properly. Many production issues arise because the equipment is not checked prior to use, leading to disrupted material flow and unnecessary material waste. Therefore, inspection is a critical first step.

2. Starting the Equipment
When starting the vacuum conveying machine, operations should commence promptly. Delaying material loading after the machine has been running can cause idle operation, reducing performance and shortening equipment lifespan. Users should start loading materials immediately after powering on the machine to ensure proper operation.

3. Operating Process
During material loading, attention to technique and operational details is essential to avoid issues. Improper handling can prevent the machine from functioning correctly, affecting production quality and efficiency. Users are reminded to follow operational procedures carefully to ensure smooth and accurate conveying.

4. Shutting Down the Equipment
After material loading is complete, the machine should be turned off promptly to save energy. Leaving the machine running idle can significantly impact its performance and longevity.

Although these steps may appear simple, many operators fail to standardize procedures in practice. Proper attention to operational details is crucial to maintain consistent production performance.

Maintenance of the Powder Vacuum Conveying Machine

1.Filter Maintenance

Instructions: Regularly inspect the filter surface and check the tightness of nuts to prevent clogging, damage, or detachment.

Method: Use compressed air to clean accumulated dust from the filter surface; water may also be used if necessary.

Frequency: For new machines, inspect weekly; thereafter, adjust based on usage.

2.Water-Circulating Vacuum Pump Maintenance

Instructions: Regularly check the turbidity of water in the tank. When starting the vacuum conveying machine, observe whether material is present at the drainage outlet.

Method: Replace the tank water if it becomes excessively dirty.

Frequency: Weekly is recommended, depending on water quality.

3.Electrical Maintenance

Instructions: Because pneumatic control is involved, ensure compressed air is free of water, oil, and impurities to prevent damage to electrical components.

Method: Use a three-stage filter system; for special cases, add two additional filters.

Frequency: Drain water or oil accumulations promptly as needed.

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Principle Introduction

Using the vacuum conveying principle, various powders and granules can be conveyed from the storage container to the hopper of any plastic machine. It can be used in conjunction with profile units, compounding systems, and chemical processing equipment. It is equipped with a pneumatic fan valve and a discharge auxiliary air valve, which can make the discharge more smooth; As well as the back-flushing sealing valve and high-pressure back-blowing device, so that the back-blowing effect is better; 6 sets of filter elements and special filter element lamination are used to make the filtration area larger and the filtration effect better; Convenient quick-release design, easy to clean and repair. It completely replaces manual feeding, realizes fully enclosed automation in the production process, and is safe, reliable, green and environmentally friendly.

Product Details

The powder vacuum feeder uses a single air as the power source, which is an intrinsically safe explosion-proof equipment, a dust-free closed pipeline conveying equipment that transports particles and powdery materials with the help of vacuum suction, which can eliminate dust environmental pollution, improve the working environment, and reduce the pollution of materials by the environment and personnel, and improve cleanliness.

Equipment Advantages

• Adopt microchip control technology, which has the characteristics of accurate control, easy operation, and multiple alarm prompts;
• Imported dust interception filter device is adopted, which has the characteristics of high strength, good dust interception effect, green environmental protection, etc.;
• Equipped with pulse compressed air backflush cleaning device, the cleaning effect is better;
• The suction port is automatically closed at the suction port when the blowback is blown, and there is no dust and no pollution;
• The vibrating discharge system can effectively prevent bridging, and the discharge is more uniform and stable;
• It can be equipped with 1-7 vacuum hoppers, which is suitable for a pair of multiple raw materials to be transported to the extruder or storage tank/replenishment bin over a long distance;
• It has the characteristics of easy cleaning, easy disassembly, easy maintenance, no noise, etc.;
• Realize automated, unmanned and green production, and effectively reduce labor costs.

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Principle Introduction

The dust-free feeding station is a powder unloading system mainly composed of a working platform, filter assembly, filter back-blowing cleaning device, negative-pressure fan, bar grating, temporary storage hopper, and related components.

Optional configurations include a vibrating screen, crusher, magnetic separator, and drum tipping bracket to adapt to various application requirements.

Product Details

The starch dust-free feeding station is primarily designed for manual bag opening and material dumping into the enclosed feeding unit. A negative-pressure dust collection system automatically extracts dust particles generated during the unloading process, effectively preventing the dust dispersion associated with conventional feeding methods.

The dust-free feeding station is widely used in food processing, new energy lithium battery production, chemical industries, and other sectors. It is typically installed upstream of mixers and packaging machines for floor-level feeding, integrating feeding and material transfer into a single operation. The feeding hopper is equipped with an independent dust removal system to ensure that no dust escapes during loading. The equipment is constructed from stainless steel and complies with GMP standards.

Equipment Advantages

• Simple structural design, easy operation, and low maintenance cost.
• Automated control system ensuring stable and reliable operation.
• Dust-free unloading, preventing dust dispersion and enabling clean production.
• Equipped with screening and vibration devices to facilitate material discharge and downstream pneumatic or mechanical conveying.

Widely applied in food, pharmaceutical, chemical, and metallurgical industries for unpacking, feeding, screening, and unloading small-bag materials. It is particularly suitable for manual powder feeding and pre-screening operations. During bag opening, the integrated dust collection fan effectively prevents dust from spreading into the workspace.

Working Process of the Starch Ton-Bag Feeding Station

Preparation:
Prepare the feeding station equipment and operating area in advance. This may include installing a ton-bag unpacking machine, setting up conveyors, and preparing containers to receive the material.

Material Placement:
The station is typically used for materials packed in ton bags (also known as bulk bags or FIBC bags). Operators position the ton bag securely at the designated location of the feeding station.

Lifting and Positioning:
Some ton-bag feeding stations are equipped with lifting mechanisms. A crane or hoisting system can be used to lift and accurately position the ton bag, ensuring proper alignment for discharge.

Start of Unloading:
Once the bag is securely positioned, operators initiate unloading. This may involve opening the bag outlet to allow material flow. Some systems incorporate vibration or flow-aid devices to promote smooth discharge.

Material Transfer:
The discharged material is transferred via conveyor belts or other conveying systems to the designated destination, such as a storage silo, mixing unit, production line, or other processing equipment.

Completion:
After the material has been fully transferred, operators shut down the feeding station and prepare the system for the next loading operation.

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