Method and apparatus for burning brown coal

摘要

Method for combusting brown coal in a tangentially fired furnace comprises mixing brown coal fuel with carrier gas and a necessary amount of flue gas from the furnace with the mix of fuel and carrier gas for drying the fuel to a moisture content suitable for combustion. The mix of fuel and gas is fed into a tangentially fired furnace at least one corner of the furnace so that the mix is directed towards the center of the furnace for forming a vortex in the center of the furnace. In order to ignite the fuel/gas mix, it is fed into the furnace through a feeding pipe having a stabilizer ring extending at least partially into the pipe at the end of the pipe and the amount of the flue gas in the fuel/gas mixture is adjusted so that the oxygen content of the mix is at least 15 %.