Belt Conveyor Reliability for Pulp & Paper Mill Material Handling
Belt Conveyor Reliability & Maintenance maintenance and reliability for Reliability Consulting for Pulp & Paper Mills facilities.
Why it matters
Key Benefits
Reliable Wood Chip and Bark Supply
Belt condition monitoring ensures chip and bark conveyor systems deliver fuel to boilers and fiber to digesters at the rates that mill production schedules require without supply interruptions.
Maintained Recycled Fiber Handling
Conveyor performance monitoring on recycled fiber handling systems maintains the throughput that repulping operations require to keep the paper machine furnish system supplied with secondary fiber.
Fire Prevention on Fuel Conveyors
Fire detection and belt condition monitoring on bark and chip conveyors prevents the conveyor fires that create extended fuel handling outages and potentially damage adjacent mill structures.
Context
Challenge & Approach
The Reliability Challenge
Belt splice failures on chip conveyor systems halt fiber supply to digesters and create pulp production bottlenecks within hours. Idler bearing seizure in outdoor bark conveyor applications causes belt damage and fire risk from friction-generated heat. Drive pulley lagging wear reduces traction and causes belt slippage during wet and frozen material handling. Belt mistracking on inclined conveyors causes material spillage that creates housekeeping and safety hazards in conveyor galleries.
Our Approach
We deploy vibration monitoring on conveyor drive motors, gearboxes, and critical idler bearings to detect degradation before seizure occurs. Belt splice condition assessment using ultrasonic and visual inspection identifies weakening before failure. Belt tracking sensors detect mistracking before material spillage occurs. Infrared scanning of idler bearings identifies hot bearings that present fire risk. We schedule conveyor maintenance to align with digester cooking cycles and bark boiler planned outages.
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Learn More →Critical conveyor applications include chip conveyors feeding digesters (supply interruption halts pulp production), bark conveyors feeding power boilers (interruption reduces steam generation), recycled fiber conveyors feeding repulping operations, and log deck conveyors feeding debarking and chipping. Each represents a material supply chain where conveyor failure directly curtails the downstream process.
Wet bark at 50 to 60 percent moisture content is heavy and adhesive, creating high belt loading and material carryback that builds up on return idlers and pulleys. Bark sticks to belt surfaces and conveyor components, requiring effective belt cleaning systems. Frozen bark in winter creates additional loading and can cause belt mistracking. Belt tracking and cleaning systems must be robust enough to handle the variability of bark moisture and consistency across seasons.
Bark and chip conveyors present fire risk from friction heat at misaligned or seized idlers, hot work in adjacent areas, spontaneous combustion of fine material accumulation, and lightning strikes on outdoor conveyors. Bark is more combustible than wood chips due to its lower ignition temperature and higher surface area. Heat detection along conveyor paths, automatic deluge systems at enclosed transfer points, and regular housekeeping to remove material accumulation are essential fire prevention measures.
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Keep Fiber Supply and Fuel Feed Moving Reliably
Our conveyor programs prevent the material handling failures that disrupt pulp production and bark boiler fuel supply.
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