Multi-station bag unloader

National Bulk Equipment (NBE) has introduced a 5-station bulk bag unloader system that is said to discharge safely and accurately 12 million pounds a year of combustible input ingredients.

The system combines high-capacity structural construction with a centralised control and automation architecture to supply to downstream process operations. Each station is constructed of thick-wall, 6-ins by 4-ins carbon steel structural tubing, and heavy-gauge carbon steel plate to meet, or exceed, ANSI and ASME specifications and ensure reliable, low-maintenance operation during virtually continuous-duty operation.

The control and automation architecture uses custom PLCs and HMIs engineered, programmed, and built by NBE to integrate to the process facility’s central control system, while also complying with international standards. The five different material types range in bulk density from 150kg/cbm to 630kg/cbm, each with varied, non-free flowing material characteristics. Each unloader uses two integrated, hydraulic massage paddles with 2,200 pounds of paddle pressure to condition the material and aid material flow. The combustible materials move from the bulk bag through the NBE E3 enclosed bag spout interface where, with the closed-cycle dust collection system, migrant material generated during bag unloading is collected and re-introduced to the process flow.

The E3 also works during bulk bag unloading to elongate the bulk bag to further ensure complete material discharge. Operator exposure to these materials was eliminated, and operator physical ergonomics were optimised as a result of rigorous NBE risk assessment procedures.

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