Managing the risk of combustible gas in drum dryers

The Wood Pellet Association of Canada (WPAC) and the BC Forest Safety Council (BCFSC) have released a report that summarises the key actions plant operators can take to manage the risk of combustible gas in drum dryers.

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In wood pellet production, there is the potential for the formation and ignition of combustible gas, primarily in dryers and burners. Combustible gas, also known as synthesis gas or syngas, is a mixture of flammable hydrocarbons and volatiles (such as methane), carbon monoxide and hydrogen. Combustible gas is formed when biomass is heated in low-oxygen environments. It can accumulate in enclosed areas, like dryers, ducts, cyclones and piping. Ignition of combustible gas can lead to explosions that cause injuries, facility damage and production downtime.