| 摘要 |
<p>The invention relates to a system and a device for firing fuel supplied into the furnace as solid or fluid particles (1), which consist e.g. of spent liquors from the pulp industry and the organic content of which is partly burnt as char (2) on the floor (3) of the furnace with oxygen-containing gas jets (4), which usually are arranged in horizontal rows, and partly higher up in the furnace as char in suspended particles and as volatiles, utilizing vertical rows of oxygen-containing gas jets (5), which induce strong flows perpendicular to the jet rows, or in other words give good horizontal mixing, enabling burning with lower oxygen content thus reducing emission of NOx, but on the other hand weak vertical gas flows, which give stronger concentration of burning in the lower part of the furnace, and thanks to that higher temperatures and better burning stability but less transportation and carry-over of particles.</p> |
