Pneumatic Convey of Difficult Materials
Some raw materials are difficult to transport by traditional pneumatic systems. Raw materials categorized problematic can be oily, sticky, hygroscopic or heat sensitive or have a high oxidation potential.
Possible solutions are:
- Use dry air as transport media
- Use dry and cold air as transport media
- Adjust the product/air ratio
- Ensure that no condensation takes place in the transport pipe by insulation/tracing
- Use nitrogen as cooling agent
- Nitrogen as transport media to avoid oxidation
- Modify powder intake system if needed
- Test products expected to be difficult in a pilot pneumatic system
- Design the pneumatic system based on test results
It is important to collect process and product information,
in order to design the correct pneumatic system for difficult raw materials
- Room temperature and humidity variation in actual production area
- Transport distance bendings and pressure drop
- Raw material temperature variation
- Raw material particle size distribution
- If needed, trial results from pilot plant
- Product data sheet
- Physical analyses (Flow ability, density etc.)