Creating process heat using biogenic solid fuels
Biomass plants use organic solid fuels such as sawdust, wood chips, timber or landscape management by products to produce hot flue gases. Biomass is an excellent alternative to generating heat using conventional fossil fuel products. Depending on their quality, these solid biomass fuels can create high demands on a plant. The combustion process, the heating components and the legal and emission regulations must be considered.
Many biomass burning plants have been built since the end of the 90s as a measure to end dependence on fossil fuels. Many plants constructed early on have ongoing issues with the two and three-pass heaters. Recurring ash is a major reason heaters require frequent cleaning – up to six times a year. This cleaning operation requires the plant to be shut down. The ash is also a solid material that in certain conditions (ex: high flow rate) can take on abrasive properties and over time, the tube coil can be damaged. Over a period of time, the abrasion from ash causes a reduction in wall thickness of the tube coil and holes will eventually form. In the worst case, a fire will occur. At the minimum, extensive repairs will be required for proper and safe operation.