Pneumatic Conveying of Fish Food Pellets
Two dense-phase pneumatic conveying systems were supplied to handle 35 tons per hour of Fish Food Pellets over a distance of 265 feet horizontal and 90 feet vertical. The systems were 30 cubic foot vessels with a 10 inch pipe line. Both systems were located under a feed hopper with start and stop controlled in automatic mode by the feed hopper and silo reception level probes.
The systems are working very reliably with no line blockages and exceed the customer’s expectations regarding transfer rate providing 40 tons per hour for large fish food pellets and over 50 tons per hour for the smaller pellets. Material degradation was a key concern with a requirement of 0.6% maximum degradation. The pneumatic conveying systems easily achieved their objectives with an average material transfer velocity of between 8 feet per second and 9 feet per second. The pipe line conveying pressure was between 12psi and 13.5psi. These particular systems incorporated multiple manifold settings allowing the transfer of a wide range of products materials and sizes.
Material Characteristics
- Fish Food Pellets: 1/8″ to 1/2″
- Bulk Density: 40 lb/ft³
- Temperature: 60°F
- Moisture Content: 8.0%
- Condition: Free Flowing
System Objectives
- Minimal material degradation
- Low conveying pressure
- Reliable operation
System Performance
- Transfer Capacity: 35 t/h
- Conveying Distance: 355ft
- Reception Points: 1 feed and 24 reception points per system.
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Pneumatic Conveying of Fish Food Pellets (pdf)
pneumatic conveying system fish food pellets
System Flow Layout (Click for Larger Image)