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From Powder to Granules: A Guide to Dry Granulation in the Chemical and Food Industries

  1. Industry Needs The chemical and food industries have increasingly strict requirements for powder granulation. Uniform granules impact mixing performance, flowability, product quality, production efficiency, and downstream reaction stability. 2. Dry Granulation Principle Dry granulation (Roller Compactor) mechanically compresses powder into high-density sheets, then cuts and mills them into granules. No water or high-temperature treatment is needed, protecting heat-sensitive materials. It is suitable for heat-sensitive chemicals, food additives, and functional nutrition powders. 3. Technical Advantages Material Activity Preservation: Mechanical compaction prevents thermal degradation and loss of chemical components. High Productivity: Suitable for large-scale production, with granule yield exceeding 85%. Ease of Operation: Compact design, easy assembly and maintenance. Granule Control: Adjustable roller gaps and hydraulic systems ensure uniform density and hardness. 4. Application Scenarios Chemical raw materials: catalysts, fillers, composite additives Food raw materials: functional nutrition powders, heat-sensitive flavor powders, seasoning powders Optimized granules improve flowability and mixing uniformity, enabling stable operation of production lines. 5. Conclusion Dry granulation technology offers an efficient, controllable, and safe solution for chemical and food industries, making it a key method to enhance productivity and quality in modern powder processing

2026

06/04

Low-Energy Granulation Solutions for the Chemical Industry: Mechanical Compaction Preserving Material Activity

  1. Industry Challenges In chemical production, the activity and uniformity of powder raw materials directly impact downstream reactions and product performance. Traditional wet granulation often requires heating or water addition, increasing energy consumption and risking degradation or loss of heat-sensitive chemical components. 2. Mechanical Compaction Dry Granulation Principle Mechanical compaction dry granulation (Roller Compactor) compresses powder into high-density sheets using high-pressure rollers, which are then cut and milled into granules. The process requires no water or high-temperature treatment, preserving chemical activity. Granule density and hardness are adjustable to meet different processing needs. 3. Technical Advantages Activity Preservation: Mechanical compaction prevents loss of chemical components, ideal for heat-sensitive materials. High Productivity: Granule yield can reach 85% (8–60 mesh), significantly enhancing production efficiency. Energy Saving: No water or drying required, reducing energy consumption and wastewater discharge. Operational Safety: Excellent sealing prevents dust leakage, ensuring operator safety. 4. Application Examples Dry granulation is widely used for catalyst powders, functional fillers, and composite additives. Uniform granules improve reaction efficiency, dosing accuracy, flowability, and solubility, providing reliable support for large-scale chemical production. 5. Conclusion For chemical manufacturers seeking high productivity, low energy consumption, and preservation of raw material activity, mechanical compaction dry granulation offers a sustainable, cost-effective, and safe solution—a new trend in modern chemical powder processing

2026

06/04

How to Optimize Chemical Raw Material Granule Quality with High-Efficiency Dry Granulation

  In the chemical industry, the granule quality of powder raw materials directly impacts downstream processing, reaction efficiency, and final product performance. While traditional wet granulation can improve particle morphology, it may cause active ingredient loss and increased energy consumption for heat-sensitive or easily oxidized materials. To address these challenges, high-efficiency dry granulation equipment (Roller Compactor) offers an ideal solution. Dry granulation mechanically compacts powder into high-density sheets, which are then cut and milled into uniform granules. The entire process requires no water, stirring, or drying, conserving energy and preventing degradation of thermally sensitive chemicals. Adjustable roller gaps and hydraulic systems allow precise control over granule density and hardness, ensuring consistent particle uniformity. The advantages of dry granulation include: (1) chemical properties remain stable, preserving active components; (2) high productivity, with finished granules achieving 85% yield for 8–60 mesh sizes; (3) compact design with easy assembly and disassembly, requiring less than 8 minutes for maintenance; and (4) excellent sealing, preventing leakage and ensuring operator safety. Particularly for heat-sensitive chemicals, mechanical compaction avoids thermal damage, improving product stability and downstream processing performance. In practical applications, dry granulation is suitable for various chemical raw materials such as catalyst powders, functional fillers, and composite additives. By optimizing particle size and density distribution, it enhances flowability, solubility, and uniformity, providing reliable support for precision reactions and subsequent processing. For large-scale chemical production demanding high efficiency and consistency, high-efficiency dry granulation is a sustainable and cost-effective choice.

2026

06/04

Key points to consider when discussing or designing a spray dryer

Here are some key points to consider when discussing or designing a spray dryer: 1. Inlet Temperature: The temperature of the air entering the spray dryer affects the drying rate and the final product quality. Typically, it ranges from 150°C to 250°C, depending on the product being dried. 2. Outlet Temperature: The outlet temperature (air leaving the dryer) should be carefully controlled to avoid over-drying or burning the product. It usually ranges from 60°C to 100°C. 3. Feed Characteristics: The feed’s temperature, viscosity, solids content, and particle size are critical for determining the dryer’s efficiency and the quality of the end product. 4. Atomization Method: The method of atomizing the feed into fine droplets plays a significant role in the drying efficiency. Common methods include pressure nozzles, rotary atomizers, and twin-fluid nozzles. 5. Airflow Configuration: Co-current flow: The hot air and product travel in the same direction, which results in a higher outlet temperature and is suitable for heat-sensitive materials. Counter-current flow: The hot air and product travel in opposite directions, providing more efficient drying but often leading to a lower outlet temperature. Mixed flow: A combination of co-current and counter-current airflow, balancing the pros and cons of both. 6. Drying Time: The time the droplets spend in the drying chamber should be sufficient for drying but not so long that it causes product degradation. This is influenced by air temperature, airflow rate, and droplet size. 7. Particle Size: The particle size of the dried product can vary depending on the atomization technique and drying conditions. Smaller particles generally lead to quicker drying times but might need finer control of the drying parameters. 8. Residence Time: The residence time of droplets in the dryer should be optimized to ensure that the particles are adequately dried without excessive heat exposure. 9. Cyclone Separator: The cyclone separator is often used to collect fine particles from the exhaust air, separating them from the exhaust stream before discharge. 10. Moisture Content: The desired final moisture content of the dried product is a critical factor. Usually, spray dryers target a final moisture content of 2-5%, depending on the product. 11. Energy Efficiency: Spray dryers can be energy-intensive, so efficient heat recovery systems and optimal air handling (e.g., using waste heat) can improve overall energy efficiency. 12. Product Quality: Factors such as particle size distribution, color, and solubility are important product quality indicators. These can be influenced by drying conditions like inlet temperature, feed rate, and atomization method. 13. Feed Pump: The feed pump must be capable of delivering a consistent flow of slurry or liquid to the atomizer to ensure uniform drying. 14. Scale-Up Considerations: When scaling up from lab-scale to industrial-scale spray drying, factors such as heat transfer, atomization, and particle behavior should be thoroughly tested. 15. Cleaning and Maintenance: Regular cleaning of the spray dryer (especially the atomizer, cyclone separator, and chamber) is essential to prevent build-up and ensure consistent product quality. 16. Automation and Control Systems: Modern spray dryers often come with sophisticated control systems for monitoring and adjusting parameters like temperature, humidity, and airflow in real time for optimal performance. 17. Safety Considerations: Proper safety measures should be in place, including explosion protection (especially when drying flammable or combustible materials) and adequate ventilation to handle the exhaust.

2025

12/16

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