Pulp and paper manufacturing carries a combustible dust hazard that’s easy to overlook because the raw material, wood, doesn’t register as an explosion risk the way a chemical powder does. Wood dust generated during debarking, chipping, sanding, and finishing operations is genuinely explosible, and fine, dry wood fiber accumulating on structural surfaces throughout a mill has contributed to some of the more serious dust explosions in industrial history. The scale of these facilities compounds the risk, since a large pulp and paper mill can generate enormous volumes of fine material continuously, and housekeeping across a sprawling, multi-building site is a genuinely difficult operational challenge.
Recovery boilers and chemical recovery processes add a different hazard entirely. Black liquor, the byproduct of the pulping process, contains water and molten smelt at high temperature, and if water finds its way into contact with molten smelt inside a recovery boiler, the result can be a smelt-water explosion, one of the most serious and well documented hazards specific to this industry. Biomass and wood waste used as fuel for power generation on site introduce their own combustible dust and self-heating concerns in fuel storage and handling, layering onto the pulping and papermaking hazards already present.
HazBasis supports pulp and paper facilities with Dust Hazard Analysis for wood dust generated throughout processing, combustible dust testing for wood fiber and biomass fuel, self-heating and thermal instability testing for stored wood waste and biomass, and hazardous area classification for chemical recovery and processing areas. We approach these facilities with an understanding of both the dust hazards common to wood processing and the distinct chemical recovery hazards that set pulp and paper apart from other forestry and wood products industries.