Abstract: A method for production of fuel pellets from a biological material, preferably saw dust, wood or similar, where the method comprises the following steps: supplying the material to a drying step (1) and dry the material to a relative humidity from 40-65 weight-percent to 30-45 weight-percent; supplying the material from the dryer step (1), optionally via an intermediate storage step (2), to a reactor step (3, 3?) and heat the material to 200-300° C. by supply of steam; keeping the material in the reactor at the achieved temperature in sufficient time to soften the material; reducing the pressure of the reactor step (3,3?) in at least two steps, in order to defibrate the material and release of lignin, and supply the material from the reactor step (3,3?) to an additional drying step (5), optionally via an intermediate storage step (4), and optionally pelletizing of the material.

Abstract: Liquid fuel is distributed in a fluidized bed of refractory particles through the gas constriction plate of a fluidized bed incinerator. The fuel is supplied from a distribution system of circulation pipes situated well below the constriction plate and passed to the fluidized bed through risers by means of a small amount of driving agent, preferably steam, of high pressure supplied from a separate distribution system independently of the primary combustion air and the fluidizing gas. The driving agent and the fuel are passed into the risers through nozzles at the lower end of the risers.

Abstract: Liquid fuel is distributed in a fluidized bed of refractory particles through the gas constriction plate of a fluidized bed incinerator. The fuel is supplied from a distribution system of circulation pipes situated well below the constriction plate and passed to the fluidized bed through risers by means of a small amount of driving agent, preferably steam, of high pressure supplied from a separate distribution system independently of the primary combustion air and the fluidizing gas. The driving agent and the fuel are passed into the risers through nozzles at the lower end of the risers.