Solid fuels such as coal and biomass (for example, wood chips) are both cost-effective and readily available fuel source options. However, both come with unique benefits and challenges says specialist steam and boiler operations maintenance and service provider, Associated Energy Services (AES).
Once fed into a furnace, solid fuel takes time to ignite. Conversely, liquid or gaseous fuel allows for almost immediate ignition: “The response of liquid- or gas-fueled boilers to any changes in steam demand is rapid. With solid fuels, there is a delay in the response of the boiler to ramp up adequately and meet the new demand,” explains AES Operations Director Ray Lund.
“With biomass – where moisture content can fluctuate between 20% and 55% – the response is even slower than coal, as it takes time to drive off extra moisture before ignition,” he adds.