| 摘要 |
<p>A gravel bed furnace comprises a particulate hearth material layer provided on a structure in which a channel is mounted in a manner to be spaced from combustion promoting air inlets provided in a lower hearth of the furnace and cover upper portions of the air inlets and a plurality of air feed holes are provided on the sides of the channel, a hearth constructed such that the particulate hearth material forms an angle of repose relative to a surface of the hearth while moving downwardly slantwise or downwardly, a combustion chamber which includes a hearth material inlet, an inlet for substance to be burnt, and the hearth contiguous to the inlets, and take-out means for combustion residue. The gravel bed furnace eliminates shortage of a feed amount of the combustion promoting air and can be stably operated over a long term.</p> |
