Patent ID: 7739966
Filing Date: 2010-06-22
Classification: F23B,F23J,F23N

Abstract:
1. A device for the combustion of granular, solid fuel comprising: a combustion chamber, including a fire place, an air inlet for feeding air to the combustion chamber via at least one air chamber and at least one air-duct for attaining an air flow through the combustion chamber, a feeding and dosing arrangement for feeding of the fuel into the combustion chamber, an ignition device for ignition of the fuel, a control unit for operation of the combustion device and parts co-operating therewith, including automatic starts and stops of the combustion device, an outlet for hot combustion gases from the combustion chamber, a reciprocally movable ash feeder with a drive unit, controlled by the control unit for automatic feeding of ashes, unburned fuel, and slag products, out of the combustion chamber at predetermined intervals, wherein the ash feeder comprises a reciprocally movable front part having a perforated plate that enables through flow of air into the combustion chamber, and which plate constitutes an inner bottom, movable between at least an operative position, shutting the lower end of the fire place, and an ash evacuating position, and a first temperature sensor positioned in the vicinity of said combustion chamber and along a wall of the combustion chamber outside of the ash, wherein said first sensor is connected to said control unit such that after an automatic stop of said combustion device, the control unit allows activation of said drive unit only if the sensed temperature is below a critical value.