Patent ID: 7059256

Claim:
Arrangement ( 1 ) for the combustion of granular, solid fuel comprising: a combustion chamber ( 16 ); a dispensing unit ( 3 ) for feeding the fuel into the combustion chamber ( 16 ) via a fuel feed pipe ( 15 ) which opens into a centre of rotation of the combustion chamber ( 16 ); air inlets ( 22 , 23 ) with blower ( 18 ) for the delivery of primary air (P) to the combustion chamber ( 16 ) via at least one air duct or air chamber ( 24 , 25 ) in order to produce a flow of air through the combustion chamber ( 16 ) and the fuel for a primary combustion of the fuel to combustion gases, and for the delivery of secondary air (S) to a secondary combustion chamber ( 26 ) via a secondary air distributor ( 26 A) in order to produce a secondary combustion of the combustion gases formed in the primary combustion; a common outlet ( 47 ) for the primary air (P), the combustion gases and the secondary air (S) from the secondary combustion chamber ( 26 ) to a boiler space ( 12 ) in a boiler ( 2 ) for transmitting the heat from the said primary and secondary combustion to the heat supply system of the boiler ( 2 ); and the secondary air distributor ( 26 A) being designed to deliver the secondary air radially inwards towards the centre of the secondary combustion chamber ( 26 ) so that combustion is concentrated at a distance from walls of the secondary combustion chamber ( 26 ); wherein at least the combustion chamber ( 16 ) is rotatable; wherein the secondary air distributor also comprises a fan ( 49 ) for producing an air and combustion gas vortex ( 50 ) inside the secondary combustion chamber ( 26 ) and on out through the outlet ( 47 ) to the boiler space ( 12 ).