| 摘要 |
PROBLEM TO BE SOLVED: To provide a melting furnace not closing a cinder notch by solidification of slag in the vicinity of the cinder notch and capable of preventing corrosion of and damage to a water cooled-pipe, in a short period of time, provided inside of a furnace wall made of refractory material and positioned in a part where a slag self coat layer cannot be formed or is less likely to be formed and within a range directly exposed to high-temperature exhaust gas. SOLUTION: An ash melting furnace heats and melts ash introduced into the furnace by an inflammable gas swirl flow, and the heated and melted ash is discharged from the cinder notch formed in a furnace bottom. In the ash melting furnace, a metal water channel composed of a water pipe or a jacket is provided within the furnace wall of the ash melting furnace, and a melted slag layer is formed on the side of a furnace inner wall. A flame burner is provided below the cinder notch to heat the cinder notch and a fireproofing wall on the side of the lower surface of the furnace bottom around the cinder notch, and also the metal water channel extends to the periphery of the cinder notch in the furnace bottom to absorb heat from the furnace bottom and stimulate formation of the slag layer on the surface of the furnace bottom. Further, a heat resisting protective layer formed by overlaying or thermal spraying is provided on the part of the water channel, facing the side of the lower surface of the furnace bottom. COPYRIGHT: (C)2009,JPO&INPIT |
