| 摘要 |
<p>A device for combustion of granular material, for example wood flour pellets, chippings and the like, comprises a rotary solid fuel burner (1), air intake to the burner, at least one conduit (18) for the supply of fuel and outlet (3) for combustion gases to a boiler part for heat transfer to water-cooled surfaces, for example. The rotary solid fuel burner is formed as a vessel with a rear wall, said outlet (3) for combustion gases and a jacket part between the rear wall and the outlet. A fuel feed pipe (18), which forms part of a fuel feed conduit, extends through the rear end wall, and an air admission pipe (19) surrounds the central fuel feed pipe at a distance from this, so that a space (20) which is ring-shaped in section is formed between the central fuel feed pipe (18) and the air admission pipe (19). Air admission ducts (17b, 17a), which communicate with said ring-shaped space (20), extend in a radial direction out towards the jacket part and further along this a part of the way in the direction of the outlet for combustion gases, which ducts are provided along their extension with openings (10) for the introduction of combustion air from said ducts into a combustion chamber (13) in the burner.</p> |
