National Bulk Equipment dust-containing bulk bag unloader

National Bulk Equipment’s bulk bag unloader has been designed to provide dust reduction and improve process operation efficiency.

Material dust release during the bag-spouting sequence presents operator hazards and slows process cycle times and changeovers. The process-specific bulk bag discharger enables the operator to spout the bulk bag while simultaneously enclosing the bag spout interface within the closed-cycle dust recovery system, which prevents the release of dust into the work area by recovering the contained dust and reintroducing the material dust back into the discharge path.

As material flow moves from the bulk bag through the bag spout interface, the suspension system automatically reacts to the lessening volume of material in the bulk bag and lowers the bag spout interface to pull the bag into a taut, conical shape. This bag-shaping function ensures no residual material remains in the bulk bag and, as a result, no residual material dust is released during unspouting.

The bulk bag discharger unloads various semi free-flowing, hygroscopic, contaminable powders at a rate of 2721 kg/h. Changeover times are shortened due to reduced equipment cleaning times and improvements in operator bag-spouting efficiency.

The complete process sequence operates on paired, process-specific structural framework chassis, with all automation and control functions centralised to a menu-driven HMI to enable standardised and system-wide data reporting.