INDUSTRY NEWS


Can pellet quality affect boilers?


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8 Summer 2018 8


he value of preventative maintenance for all services and fixed assets within any business is


well-established, but what should be done to reduce unplanned maintenance?


According to The Land Energy Team, a common cause of wood pellet boiler breakdowns can be attributed to poor quality pellets. Typically, this is demonstrated by dust or fines within the pellets and pellets that are not a uniform length. A larger problem is the presence of contaminants such as stones and pieces of metal (known to sawmills and foresters as ‘tramp iron’).


These issues will, in turn, lead to either a boiler stoppage or will affect the quality of the burn, heat and ash output. Dust-free, uniform pellets will move through the boiler at the optimum speed to ensure a complete burn takes place, extracting the maximum amount of heat and producing the least amount of ash. Every ten tonnes of high quality ENPlus A1 pellets should be producing about ten kilogrammes of ash. High volumes of dust and fines can cause wear and tear on the conveying systems such as augurs and vacuum systems, along with


the potential to cause blockages, thus affecting the quality of the burn and heat output. Conveying systems can also suffer from severe damage such by stones and metallic elements within the pellets. In addition, the boiler grate is also susceptible to increased mechanical wear and unnecessary breakages due to contaminated supplies.


However, by choosing to invest in high quality pellets from a reliable source, the amount of unplanned maintenance is sure to be reduced over the life of the boiler.


More information from www.land-energy.com


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