Process and a means for burning solid fuels, preferably coal, turf or the like, in pulverized form

Claim 1

A process for burning solid fuels, in particular coal, turf or the like, in pulverized form wherein: (a) said solid fuels are mixed with a carrier liquid such as water and/or oil to form an emulsion; (b) said emulsion is introduced into a fuel entrance of a combustion chamber forming a fuel flow configuration, said fuel entrance having radial and longitudinal axes, and entering through a wall in the combustion chamber, whereby a recirculating flow configuration of hot combustion gases is formed, said flow configuration being generally symmetric about an axis of rotation coincident with the longitudinal axis of the fuel entrance, limited by a rotating outer air flow; (c) outer air flow is blown into the combustion chamber in a multiple arrangement of at least three concentric rotating partial flows or currents, said partial flows being variable with respect to throughput and whereby the flow velocities of said partial currents are reduced as they pass from the inner area of the combustion chamber towards the outer areas; (d) two of said at least three air flows comprising a primary air flow nearest to the fuel entrance and a secondary air flow radially adjacent said primary air flow, which enter the combustion chamber at flow velocities approximately equal to each other during all modes of operation; and (e) wherein said primary air flow is arranged between said secondary air flow and said entrance and said secondary air flow is directed such that a hollow cone-shaped air flow is directed toward said fuel flow configuration and penetrates said fuel flow configuration to break up the fuel flow configuration and said primary and secondary air flows are arranged between said fuel entrance and the balance of said at least three concentric rotating partial flows or currents.