This industrial case study demonstrates how Sanyuantang solved high-temperature fertilizer granule cooling and vertical conveying challenges by integrating a vibrating spiral elevator with water-cooled and air-cooled conveying technology.
Project Background
A Russian fertilizer manufacturer needed a stable and efficient system to handle hot granular fertilizer after production. Traditional conveying equipment, site constraints, and material properties presented certain challenges in selecting the right equipment. Let’s take a look at this case study:
- Material: fertilizer granules
- Bulk density: 0.8–1 kg/L
- Capacity requirement: 1000 kg/h
- Inlet temperature: 70°C
- Final temperature: 20°C
- Lifting height: from 450 mm to 4500 mm
- Operation mode: continuous vertical conveying with stable cooling
During production, the client faced several critical issues:
The high-temperature fertilizer granules tended to agglomerate during conveying, especially under continuous operation. The limited plant footprint required a vertical lifting height of 4.5 meters, which traditional conveying systems struggled to achieve reliably. In addition, conventional conveyors could not integrate cooling and lifting in a single compact system, resulting in unstable product temperature and inconsistent discharge quality. These limitations directly affected product quality, storage stability, and downstream packaging efficiency.
Why Fertilizer Cooling Matters for Storage Stability
High-temperature fertilizer granules are prone to moisture migration and crystal bridging during storage and transportation, increasing the risk of caking. Cooling fertilizer close to ambient temperature before packaging is widely recognized as an effective method for improving storage stability and product quality.
Read more about fertilizer cooling technology and storage stability
Engineering Challenge
The core technical difficulties included:
- Preventing caking of hot fertilizer granules during transfer
- Achieving stable vertical conveying over 4.5 meters
- Integrating cooling into a continuous conveying process
- Maintaining product integrity under 1000 kg/h throughput
- Ensuring uniform final discharge temperature close to ambient conditions
The client required a compact, energy-efficient, and continuous system capable of combining conveying and cooling without interrupting production flow.
Sanyuantang Solution: Vertical Lifting + Water Cooling + Air Cooling System
Sanyuantang engineered an integrated Vibrating Spiral Elevator-based cooling-conveying system that combines mechanical lifting with staged cooling.
The system consists of three core functional modules:
1. Vertical Conveying Module
- Stable lifting from 450 mm inlet to 4500 mm discharge height
- Designed for continuous operation at 1000 kg/h capacity
- Gentle vibration-driven conveying to minimize particle breakage and abrasion
- Compact spiral structure suitable for limited plant space
This section ensures reliable vertical transport without material blockage or degradation.
2. Water Cooling Stage (Primary Cooling)
- Indirect water-cooling system integrated into the conveying path
- Rapid heat exchange reduces bulk temperature immediately after lifting
- Designed to handle continuous high-temperature inflow at 70°C
This stage significantly reduces thermal load before final cooling.
3. Air Cooling Stage (Final Stabilization)
- Forced air cooling system for secondary heat removal
- Fine temperature adjustment to reach final target of ~20°C
- Ensures uniform cooling across all granules before discharge
This dual-stage cooling approach improves consistency and prevents overheating.
Workflow Steps
Step 1: Hot fertilizer granules are fed into the inlet at 450 mm height
Step 2: Material is lifted continuously to a discharge height of 4500 mm
Step 3: Primary water cooling removes the majority of thermal energy
Step 4: Secondary air cooling stabilizes the final temperature
Step 5: Cooled granules are discharged for packaging or storage
The entire process runs continuously without interruption, ensuring stable production output.
Equipment Reference
This solution is based on Sanyuantang’s Vibrating Spiral Elevator series, designed for vertical conveying and integrated process handling in industrial environments:
Project Results
After system commissioning and optimization, the client achieved significant operational improvements:
- Stable continuous operation at 1000 kg/h
- Final discharge temperature consistently maintained at 20°C
- Eliminated material caking during vertical conveying
- Improved product quality, consistency, and storage stability
- Reduced manual handling and energy losses
- Increased overall production line efficiency
The system demonstrated strong reliability under continuous industrial operation, particularly in high-temperature granular handling.
Client Feedback & Performance Evaluation
The Russian fertilizer producer reported that the integrated system significantly improved process stability compared to their previous conveying setup. Key observations included:
- More consistent product flow during long production cycles
- Noticeably reduced downtime caused by clogging or overheating
- Easier integration into existing production layout due to compact vertical design
- Improved downstream packaging efficiency due to stable discharge conditions
Conclusion
This project demonstrates how Sanyuantang delivers engineered solutions rather than standalone equipment.
By integrating vertical conveying, water cooling, and air cooling into a single compact system, Sanyuantang provided a tailored solution for:
- High-temperature granular materials
- Space-limited industrial plants
- Continuous production environments
- Strict temperature control requirements
The system is also suitable for similar applications involving chemical powders, feed pellets, and other granular materials that require both cooling and vertical conveying in a single integrated process.
Email: info@sanyuantang.com
Phone: +86-18639095165
