Device and method for the combustion of granular, solid fuel

A method for the combustion of granular, solid fuel comprising the following steps:

• providing a combustion chamber, including a fire place,
• providing an air inlet for feeding air into said combustion chamber via at least one air chamber and/or at least one air duct for attaining an air flow through the combustion chamber,
• providing a feeding and dosing arrangement for feeding of fuel into the combustion chamber,
• providing an ignition device for ignition of the fuel,
• providing a control unit for operation of the combustion device and part co-operating therewith, including automatic starts and stops of the combustion device,
• providing an outlet for hot combustion gases from the combustion chamber,
• providing a reciprocally movable ash feeder with a drive unit, controlled by said control unit for automatic feeding of ashes, unburned fuel and slag products out of said combustion chamber at predetermined intervals,
• wherein said ash feeder is provided with a reciprocally movable front part having a perforated plate that enables through flow of air into the combustion chamber, and which plate constitutes at least a portion of an inner bottom within said combustion chamber, said ash feeder being movable between at least an operative position shutting the lower end of the fire place and an ash evacuating position,
• wherein a first temperature sensor is positioned in the vicinity of said combustion chamber and along a wall of the combustion chamber outside of the ash, and wherein said first temperature sensor is in connection with 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.