National Bulk Equipment, Inc.

Bulk Bag Discharger with E3 System Ensures Positive Product Flow

E3 bulk bag discharger bag spout interface system installed to eliminate dust, product loss, machinery downtime and other equipment-related issues associated with a customer’s carbon black unloading process.

A multinational plastics producer and compounder utilizes powdered carbon black in several of its compounded plastics. Due to the hard, crystalline structure of carbon black and its very small particle size and gravity, the plastics producer had several material flow problems to solve to improve their bulk bag discharging operation. The discharge of bulk bags full of carbon black had traditionally caused excessive and extreme housekeeping measures due to the extremely dusty nature of the product. Constant personnel complaints resulted from their exposure to the dirty product during the full bulk bag discharging and empty bag removal processes. Additionally, an inordinate amount of processing material was wasted due to spillage, incomplete bag discharge from the bulk bag unloader, and dust from the bulk bag unloader. Finally, making the bulk bag discharger unload the bulk bags at a controlled rate had been very problematic due to the poor discharge characteristics of compacted, de-aerated carbon black.

The NBE bulk bag discharger with the "E3" system was the perfect solution to solve the customer’s bag unloading problems. The machine operator ENGAGES the bulk bag discharger's bag spout to the E3 system by spouting the untied bag over the interior product feed tube and lowering the seal plate to securely clamp and seal the bag spout. At the same time the concentric outer tube is sealed allowing for the initiation of dust EVACUATION from the equipment prior to first untieing the bag. The bag is then untied and the entire "E3" assembly is lowered ensuring that the bag discharge spout is ELONGATED to maintain a cylindrical shape aiding in consistent and controlled product discharge from the machinery. The integral "E3" bulk bag discharger vent system eliminates any dust turbulence normally created by the discharged product being exchanged with displaced air from downstream process equipment or hoppers. Bag massage paddles that are integrated with the "E3" in the bulk bag unloading system ensure positive product flow. Further, when the "E3" system is combined with the patented loop retractor bag hanger, the bulk bag is completely elongated into a cone shape ensuring complete product discharge without machine operator intervention. Once the bulk bag contents are completely discharged, the integral vent feature of the "E3" system collapses the bag by the removal of its displaced air and residual dust. Thereby allowing the operator to remove the empty bags in a dust-free environment.

Once in use, the NBE bulk bag unloading system provided the multinational plastics producer and compounder with considerable savings from reduced operating labor and housekeeping requirements, as well as an increased throughput from faster, and more complete bag discharge. Additional savings came from containing lost material due to spillage, incomplete bag discharge and dust. The operating personnel complaints due to dust, poor operating equipment, and environmental issues were also eliminated.

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Bulk bag discharger with bulk material flow aids
E3 discharge system seals bulk bag spout
Bulk material massage paddles assist in bulk material flow
Loop Retractor
Bulk bag loop retractor in full position positions bulk material bag for optimal performance
Bag Full
Bulk bag loop retractor in empty position extends bulk bag to ensure complete bulk material discharge
Bag Empty