The 5-station, bulk bag unloader system combines high-capacity structural construction with a centralized controls and automation architecture to safely and accurately supply to downstream process operations a total of 12 million lbs. per year of five combustible input ingredients. Each bulk bag unloader station is constructed of thick-wall, 6" x 4" 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 controls and automation architecture of the system use custom PLCs and HMIs engineered, programmed and built 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/m3 to 630kg/m3, each with varied, non-free flowing material characteristics. Each bulk bag unloader uses two integrated, hydraulic massage paddles with 2,200 lbs. 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.
National Bulk Equipment, Inc., www.nbe-inc.com