Patent ID: 6655303
Filing Date: 2003-12-02
Classification: F23C,F23J,F23L

Abstract:
A furnace comprising:a combustion chamber; a downwardly tilted burner arranged on a wall of the combustion chamber, the burner injecting an air-fuel mixture into the combustion chamber; an ash hopper beneath the combustion chamber and connected thereto, the ash hopper having a slotted mouth; and, an airflow device beneath the ash hopper and connected with the ash hopper via the slotted mouth, the airflow device having an air nozzle for injecting an air flow, and a curved surface arranged opposite the air nozzle, the air nozzle cooperating with the curved surface to return at least a portion of the fuel which enters the airflow device to the ash hopper, wherein the curved surface includes a lower portion arranged at an angle relative to the nozzle axis, and wherein the angle between the lower portion of the curved surface and the nozzle axis is between 0 degrees and 45 degrees inclusive.