Wet Granulation Line for Seasoning Granule

Introduction

Hywell Machinery specializes in designing and manufacturing fully integrated seasoning granule production lines that meet food-grade processing standards. This seasoning granule processing line combines intelligent dosing, high-efficiency mixing, precision granulation, uniform drying, particle size classification, and packaging – all within a sealed and dust-free environment.

This complete line is ideally suited for the production of instant seasoning granules or herbal granules, offering high automation, reduced labor, consistent granule quality, and easy cleaning. It is perfect for industries producing food seasonings, functional ingredients, herbal formulas, and natural flavoring granules.

Production Flow Overview

Process Flow:
Raw Material Feeding → Powder Conveying → Automatic Weighing & Dosing → Wet Mixing → Granulation → Drying → Sieving → Packaging → Recycling of Oversized/Undersized Particles

1. Dust-Free Raw Material Feeding

For bagged raw materials, traditional manual dumping into the mixer often generates a large amount of dust. To address this issue, Hywell’s SL-800 Dust-Free Feeding Station is used. This station is equipped with a safety screen to prevent foreign matter or agglomerates from entering the system. By minimizing airborne particles during the feeding process, the station helps maintain a clean and hygienic working environment.

 2. Vacuum Powder Transfer

The HS-5 Vacuum Conveying System (5.5 kW) automatically transfers the screened powder from the dust-free feeding station to the storage hopper under sealed negative pressure conditions. This enclosed design ensures dust-free operation and prevents material loss or contamination. The powder is then discharged from the hopper according to preset proportions and conveyed via a screw feeder into the GHJ High-Speed Wet Mixing Granulator. This fully automated transfer and dosing system greatly improves efficiency, ensures formulation accuracy, and maintains a clean production environment suitable for food or pharmaceutical processing.

3.     Precision Dosing

The raw material storage hopper is equipped with a load cell weighing module to ensure precise powder dosing according to preset formulations. This system significantly improves batch consistency and reduces material waste. However, proportion-based dosing can also be carried out manually by operators using standard weighing methods, so the automatic weighing and dosing system is offered as an optional feature based on production requirements.

4. High-Speed Wet Mixing

In the GHJ High-Shear blender, spice powders are quickly and thoroughly blended with the flavoring solution. The high-speed mixing machine is equipped with a powerful mixing impeller and a high-speed chopper to ensure uniform wet mass suitable for granulation. Its closed design and precise mixing action make it ideal for food-grade production and processing of flavor-sensitive ingredients, ensuring product consistency and minimal aroma loss.

5. Wet granulation Process

The wet mixture is then transferred to a ZL Rotary Granulator or a YK Oscillating Granulator, where it is processed into semi-uniform wet granules. Both granulation machines are constructed from 304 stainless steel, ensuring durability and easy cleaning. Granule size can be adjusted by changing the mesh screen, with typical spice granules ranging from 1.5 to 3 mm. Depending on production capacity requirements, different models and quantities of wet granulators can be selected to ensure optimal throughput and granule quality

6. Continuous Fluid Bed Drying

Conveyor transports wet granules into the ZLG Vibrating Fluid Bed Dryer or, for larger-scale production, the SFD Shaking Fluid Bed Dryer. These continuous fluid bed dryers efficiently remove moisture from the granules while maintaining their structural integrity. The gentle and uniform drying process minimizes thermal degradation of volatile aroma compounds, making them ideal for spice and flavor granule applications where preserving taste and scent is critical. Their energy-efficient design also supports continuous, high-output operations.

7. Sieving and Classification

After fluid bed drying, the granules are sent to the ZF Square Vibrating Sieve for precise particle size classification. Oversized and undersized granules are automatically separated and removed from the main product stream. Only granules within the desired size range are delivered to the packaging station. The rejected particles are finely ground using a pin mill and then recycled back into the granulation process. This closed-loop system ensures minimal material loss, consistent product quality, and high overall process efficiency.

8. Automated Packaging

The final qualified granules are conveyed to a fully automated granule packaging machine, which performs weighing, filling, sealing, and labeling. The packaging system supports sachets, pouches, or small jars depending on the customer's needs.

Line Features & Benefits

• Fully Enclosed System: Dust-free      operation with high GMP compliance

• Integrated Control: PLC system with      recipe management and interlocked safety alarms

• High Efficiency: Reduces manual      handling, shortens batch cycles, and improves throughput

• Scalable Capacity: Equipment can be      scaled to meet small or industrial production volumes

• Hygienic Design: All parts in      contact with the product are made of 304 or 316L stainless steel

• Easy Cleaning: CIP system available      for mixers, granulators, and conveyors

Main Equipment Descriptions

1. LS-800 Dust-Free Feeding Station (with Sieving)

The LS-800 Dust-Free Feeding Station is designed for manual feeding of powder materials while preventing dust contamination. It includes a safety vibrating sieve that filters out foreign materials, agglomerates, or oversized particles before entering the next stage. The enclosed hood with negative-pressure ventilation keeps the working area clean and protects operators' respiratory health. This equipment is especially useful in environments where hygiene and dust control are critical, such as food, pharmaceutical, or seasoning processing. The feeding table is ergonomically designed to reduce labor fatigue and facilitate bag opening. The station is constructed entirely from food-grade stainless steel and features quick-disassembly clamps for fast cleaning. It can be directly connected to the vacuum conveyor, ensuring smooth transfer with minimal residue. Optional upgrades include a magnetic grid separator and bag compactor system for enhanced safety and environmental compliance.

2. HS-5 Vacuum Conveyor (5.5 kW)

The HS-5 Vacuum Conveyor provides efficient and hygienic powder transfer between processing stages. It uses compressed air to create negative pressure for conveying materials in a fully enclosed system, eliminating dust emissions and contamination risks. With a capacity suitable for medium to large-scale operations, this model can transport powders, small granules, or even fragile ingredients over long distances. It includes a stainless steel hopper, filter cleaning system, pulse valve, and PLC control. The unit is designed for easy disassembly, allowing fast filter replacement and system cleaning. The conveyor can be integrated with upstream equipment such as mixers or feeders, and its discharge timing can be synchronized with downstream equipment like granulators or hoppers. Optional features include level sensors, anti-static components, and explosion-proof design for working with volatile or fine powders.

3. GHJ High-Speed Wet Mixer

The GHJ Wet Mixing Machine is a high-efficiency system that combines blending and granulating in a single closed chamber. It features a specially designed mixing impeller and a high-speed chopper blade to create uniform wet granules from powder and binder solutions. This equipment significantly reduces mixing time while enhancing batch consistency. It is ideal for forming granules used in the food, pharmaceutical, or herbal industry. The wet powder blending system is housed in a hygienic, easy-to-clean stainless steel structure with mirror-polished inner surfaces to prevent residue build-up. Its control system allows precise adjustment of mixing and chopping speeds. A built-in spray nozzle system ensures even distribution of binder liquid, and a quick-opening discharge valve allows fast product discharge. An optional CIP system makes it suitable for cleanroom-grade production. The design complies fully with GMP requirements.

4. ZL Rotary Granulator

The ZL Rotary Granulator shapes wet powder into cylindrical or round granules by pushing material through a perforated screen using a rotating blade. It’s widely used in food, seasoning, herbal, and chemical industries where uniform granule size is important. The screen mesh is easily interchangeable to adjust particle size. Built from stainless steel, it is corrosion-resistant, easy to clean, and low-noise. Its compact design fits both lab and industrial setups. Speed is adjustable via a frequency inverter for better control of granule density and output. Optional features include variable mesh sizes .

5. YK Oscillating Granulator

The YK Oscillating Granulator provides a gentle granulation process, ideal for heat-sensitive or fragile materials. Using a rotating drum and swinging arm, it presses wet material through a mesh to produce soft, uniform granules. It’s suitable for seasonings, herbal blends, and supplements. The machine features quick sieve changeover, adjustable motor speed, and stainless steel construction for easy cleaning and hygiene. Compact and efficient, it's commonly used for small-batch or specialty production. Optional features include a noise-reducing cover, discharge chute, and mobile base. Its reliability and ease of use make it a solid choice for any granulation process.

6. ZLG Vibrating Fluid Bed Dryer

The ZLG Vibrating Fluid Bed Dryer is designed for continuous drying of free-flowing granular or crystalline materials such as seasoning granules. Utilizing a combination of hot air flow and mechanical vibration, the material fluidizes evenly on a perforated plate, ensuring fast and uniform moisture removal. Vibration helps to maintain constant movement and prevent agglomeration or sticking, which is crucial for heat-sensitive or flavor-rich products. The airflow rate, temperature, and vibration frequency are fully adjustable to suit different materials and moisture contents. Its stainless steel construction ensures hygienic operation and resistance to corrosion. ZLG dryers are widely used in the seasoning, pharmaceutical, and food industries where preserving aroma and product integrity is essential.

7. SFD Swirl Flow Fluid Bed Dryer (for High Capacity Production)

The SFD Swirl Flow Fluid Bed Dryer is ideal for large-scale seasoning granule drying. Its advanced swirl flow design allows turbulent hot air to interact with the material more efficiently, enhancing heat transfer and evaporation rates. Unlike traditional dryers, the SFD promotes a cyclone-like motion that ensures granules are suspended evenly, reducing the chance of clogging or uneven drying. This leads to a significantly shorter drying time, lower energy consumption, and better preservation of product characteristics like color, aroma, and solubility. The system supports precise control of air velocity, inlet temperature, and retention time. Constructed with stainless steel and food-grade gaskets, it meets the highest hygiene standards. The SFD fluid bed dryer is particularly effective when paired with upstream wet granulation equipment, ensuring consistent product throughput. It includes safety systems such as pressure relief vents, temperature alarms, and emergency stops.

8. ZF Square Vibrating Sieve

The ZF square Vibrating Sieve is designed for precise classification of dried granules by size. Driven by a horizontal vibration motor, it uses multi-layer screens to separate fine powder, acceptable granules, and oversized particles. The vibrating motion ensures high efficiency and prevents screen clogging. Screens are easy to replace for size adjustments. Made from food-grade stainless steel, the unit features a smooth finish, dust-tight seals, and inspection doors for easy cleaning. Ideal for applications requiring consistent particle size, it handles both wet and dry sieving. Optional features include ultrasonic cleaning and mobile frames with lockable wheels.

9. Pin Mill Pulverizer

The Pin Mill is a high-speed impact grinder used to reduce oversized granules or agglomerates into fine powder for reuse in the granulation process. It uses fixed and rotating pins to create a high-shear zone that breaks down material efficiently without overheating. The resulting fine powder can be recycled back into wet mixing, reducing waste and boosting yield. Made from stainless steel, it meets GMP standards and is easy to clean. Features include dust-tight operation, overload protection, and safety interlocks. Particle size is adjustable via rotor speed or screen mesh. Its compact design allows easy integration into production lines.

10. Automatic Granule Packaging Machine

The Automatic Granule Packaging Machine is a fully integrated system designed to pack granules into pouches, sachets, or jars with high speed and precision. It performs multiple operations – automatic weighing, filling, sealing, cutting, coding, and counting – with minimal operator intervention. The machine supports various packaging styles such as pillow bags, stick packs, gusseted bags, and quad-seal bags. It uses servo-driven auger or cup filler mechanisms, depending on the product characteristics. The machine's smart PLC control system allows easy recipe changeover and real-time monitoring of production parameters. All contact parts are made of 304 or 316L stainless steel, and the structure is sealed to prevent dust ingress. Advanced options include nitrogen flushing, zipper sealing, and film auto-alignment. The system ensures accurate dosing with minimal product waste and complies with global food and pharmaceutical packaging standards. It’s a critical end-of-line solution for granule producers seeking consistent output, appealing packaging, and automated performance.

Applications

This line is especially suitable for:

• Food Seasonings (e.g., curry, chili, onion powders)

• Instant Herbal Granules

• Flavoring Compounds

• Natural Nutraceuticals

• Dry Soup Bases

• Seasoningd Instant Beverage Bases

Optional Customizations

• Full stainless steel 316L contact surfaces for highly corrosive      or salty ingredients

• Automated CIP cleaning systems for high hygiene environments

• Integration with MES or ERP systems for intelligent      manufacturing

• Custom PLC and HMI interfaces in English, Spanish, or other      languages

• Validation support for food, pharma, and nutraceutical      production

Conclusion

Hywell Machinery’s fully integrated seasoning granule production line offers superior efficiency, hygiene, and control for customers seeking a reliable solution to produce high-quality seasoning or herbal granules. Whether your application requires small-batch flexibility or continuous large-scale output, we provide tailored systems to meet your technical and production demands.

Contact our sales engineers today for a custom quotation or to schedule a live demonstration of our granulation technology.