| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pellet circulating heat exchanger to avoid defective circulation of a pellet. SOLUTION: There are provided a heat exchanger barrel 28 which comprises a gas outlet 36, a gas inlet 35, an air outlet 38, an air inlet 37, a pellet feeding means 30 for feeding a pellet 29 from an inside bottom of the heat exchanger barrel 28 toward an upper inside part, a diaphragm 32 which, with a vertically penetrating path 31 formed, so inscribes the heat exchanger barrel 28 as to be positioned between the gas inlet 35 and the air outlet 38, and a rack 50 which is, comprising many holes 50a in which the pellet 29 can pass, so provided as to be reversible above the gas inlet 35 in the heat exchanger barrel 28. The racks 50 are so reversed with an appropriate interval that the pellet 29 falling from above collides with front and rear surfaces of the rack 50 alternately, suppressing a low melting-point substance in an exhaust gas from sticking to the rack 50.</p> |
