Abstract A high intensity burner for burning a carbonaceous fuel in an oxygen containing atmosphere has one or more ports through which the fuel emerges and adjacent which complete combustion of the fuel occurs within a limited combustion region at a temperature above the dissociation temperature of CO2. A heat exchanger, which is maintained at a temperature below the recombination temperature of CO and O2, is located outside the limits of said combustion region but sufficiently close to the burner ports so that, at the normal operating velocity of the burned gases these gases would reach the heat exchanger before the temperature of the gases had dropped below the dissociation temperature and into the recombination temperature range, except for the fact that a screen is located between the limits of the combustion region and the heat exchanger, and is heated by the gases, thereby extracting heat from the gases, to a temperature at which it radiates energy, thus reducing the temperature of such gases into the recombination temperature range before they reach the heat exchanger.
The combination of claim 1 in which the heat exchanger structure presents heat conductive members adjacent said refractory member and said refractory member is substantially insulated against any high heat conductivity paths between it and all adjacent heat conductive members, whereby said refractory member during operation is heated by said products to a temperature at which it loses heat substantially solely by radiation.
Claim 2
Dependent Claim
28 words
The combination of claim 1 in which said burner, said refractory member and said heat exchanger are cylindrical in form and concentrically arranged with respect to each other.
Claim 3
Dependent Claim
17 words
The combination of claim 1 in which said refractory member is comprised of a refractory metal alloy.
Claim 4
Dependent Claim
28 words
The combination of claim 2 in which said refractory member is supported by one or more heat insulating, sound absorbing members supported by the adjacent heat exchange structure.
Claim 5
Dependent Claim
15 words
The combination of claim 5 in which said heat insulating members are comprised of asbestos.